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Hamanaka Akihiro Last modified date：2021.04.19

Assistant Professor / Mining System Engineering
Department of Earth Resources Engineering
Faculty of Engineering


Graduate School
Department of Earth Resources Engineering
Graduate School of Engineering
Undergraduate School
Department of Earth Resources,Marine and Civil Engineering
School of Engineering


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Homepage
https://kyushu-u.pure.elsevier.com/en/persons/akihiro-hamanaka
　Reseacher Profiling Tool　Kyushu University Pure
Phone
092-802-3331
Fax
092-802-3368
Academic Degree
Dr. Eng.
Country of degree conferring institution (Overseas)
Yes　Doctor
Field of Specialization
Rock Engineering, Geospace Development Engineering
Total Priod of education and research career in the foreign country
00years00months
Outline Activities
-Research-
My recent research topics are as follows;
*Rehabilitation of post surface mined area
*Acid mine drainage
*Soil erosion
*Underground coal gasification

-Education-
*Adviser to Graduation (Undergraduate) and Master's Research and Thesis

-Social Activities-
*Awareness activities of UCG as Mikasa-city in Hokkaido
Research
Research Interests
  • Study on Rehabilitation of post mined surface in tropical regions
    keyword : Acid mine drainage, Opencut mine, Revegetation, Soil erosion
    2012.04～2025.03.
  • Utilization of Unused Coal Resources by means of Underground Coal Gasification
    keyword : Unused coal, Underground coal gasification, Acouostic emission
    2015.04～2024.03.
  • Study on Rehabilitation of post mined surface in tropical regions
    keyword : Acid mine drainage, Opencut mine, Revegetation, Soil erosion
    2012.04～2017.03.
  • Eco-friendly development of seabed resources in deep sea area
    keyword : seabed resources , seabed structure
    2012.04～2022.03.
  • Study on effect of chemical grout injection on stability of soil and environment
    keyword : Chemical grouting, Improvement of soil
    2012.04～2020.03.
  • Study on design and construction of underground pipeline by pipe jacking
    keyword : Pipe jacking, Thrust, Mud slurry, Mud cake, No-dig method
    2012.04～2017.03.
  • Study on the utilization of cemented flyash
    keyword : Flyash cement, Highly Utilization
    2012.04～2017.03.
  • Study on blast control at limestone quarry
    keyword : Limestone Quarry, Blast vibration, Control of fragmentation
    2012.04～2023.03.
Current and Past Project
  • Based on the previous research results, the regional innovation business model which utilizes underground coal gasification (UCG) is suggested. In addition, the next plan for demonstration test is planned.
  • Study on the utilization of flyash considering global environment
Academic Activities
Reports
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Papers
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1. Peng MA, Hideki SHIMADA, Takashi SASAOKA, Akihiro HAMANAKA, Tumelo K. M. DINTWE, Donjiang PAN, Investigation on the Performance of Pipe Roof Method Adjacent to the Underground Construction, Geotechnical and Geological Engineering, 2021.02.
2. Takashi SASAOKA, Pisith MAO, Hideki SHIMADA, Akihiro HAMANAKA, Jiro OYA, Numerical Analysis of Longwall Gate-Entry Stability under Weak Geological Condition: A Case Study of an Indonesian Coal Mine, Energies, https://doi.org/10.3390/en13184710, 13, 18, 2020.09.
3. Takashi SASAOKA, Akihiro HAMANAKA, Takahiro FUNATSU, Hideki SHIMADA, Keisuke TAKAHASHI, Study on Addition of Surfactants Agents to Improve the Behavior of High Water Content Sediment for Rare Earth Mining in Deep Sea, Inzynieria Mineralna, http://doi.org/10.29227/IM-2020-01-64, 1(45), 183-188, 2020.07.
4. Kazuki MAEHARA, Akihiro HAMANAKA, Takashi SASAOKA, Hideki SHIMADA, Seiya SAKUMA, Study on Control of Wall Deflection in Earth Stepped-Twin Retaining Wall Using Anchor Method by means of Numerical Simulation, Advances in Civil Engineering , https://doi.org/10.1155/2020/2710954, 2020, Article ID 2710954, 8 pages, 2020.01.
5. Akihiro HAMANAKA, Fa-qiang SU, Ken-ichi ITAKURA, Kazuhiro TAKAHASHI, Jun-ichi KODAMA, Gota DEGUCHI , Large-scale Laboratory Experiment on Development of Underground Coal Gasification with Horizontal Well , Proc. of 5th ISRM YSRM2019 and REIF2019, USB memory, 2019.12.
6. Akihiro HAMANAKA, Han Huor OENG, Kazuki MAEHARA, Takashi SASAOKA, Hideki SHIMADA, Toru SATO, Effects of Lubricants in Over-cutting Area of Pipe Roof Method on Reducing Surface Settlement, Proc. of VCRES 2019 international symposium, 141-148, 2019.11.
7. Akihiro HAMANAKA, Takashi SASAOKA, Hideki SHIMADA, Shinji MATSUMOTO, Experimental study on soil erosion under different soil composition using rainfall simulator, Plant, Soil and Environment, 10.17221/68/2019-PSE, 65, 4, 181-188, 2019.04, Soil erosion is one of the major environmental problems in open-cut mines in tropical regions. It causes negative impacts including the removal of nutrient-rich topsoil, destroys aquatic habitat, dam and pond siltation, clog river by deposition of sediment, and water pollution in the rehabilitation process. Soil texture is an important factor to affect soil erosion. In this study, artificial rainfall experiment in laboratory scale was conducted to clarify the mechanism of soil erosion under the different soil composition and to discuss the method for minimizing soil erosion. Obtained results showed that the soil seal generated due to the presence of fine particle under high rainfall intensity is the main contributor to accelerate the soil erosion. Additionally, the surface coverage by the cover crops is most effective measures to reduce soil erosion because the both of coarse and fine contents runoff can be minimized while the arranging slope angle is effective for reducing the runoff of coarse contents and the soil compaction is effective to reduce that of fine contents. Soil erosion can be minimized by selecting prevention method considering the type of soil because the prevention effect on soil erosion is different depending on the type of soil..
8. Akihiro HAMANAKA, Ken-ichi ITAKURA, Fa-qiang SU, Gota DEGUCHI, Jun-ichi KODAMA, Estimation of Gasification Area of Underground Coal Gasification by using Acoustic Emission Monitoring, Prof. of 10th Asian Rock Mechanics Symposium, CD-ROM, 2018.11.
9. Akihiro HAMANAKA, Hiroto YAMASAKI, Takashi SASAOKA, Hideki SHIMADA, Shinji MATSUMOTO, Application of Fly Ash to Acidic Soil to Improve Plant Growth in Disturbed Land of Open-cut Mining, Proc. of 18th Symposium on Environmental Issues and Waste Management in Energy and Mineral Production, 129-137, 2018.11.
10. Akihiro HAMANAKA, Ken-ichi ITAKURA, Fa-qiang SU, Jun-ichi KODAMA, Gota DEGUCHI, Several Considerations on Application of Underground Coal Gasification (UCG) with High Efficiency and Safety, Proc. of 25th World Mining Congress, USB memory, 2018.06.
11. Fa-qiang SU, Akihiro HAMANAKA, Ken-ichi ITAKURA, Gota DEGUCHI, Wenyan ZHANG, Hua NAN, Evaluation of a Compact Coaxial Underground Coal Gasification System Inside an Artificial Coal Seam, Energies, doi:10.3390/en11040898, 11, 4, 2018.04.
12. Shinji MATSUMOTO, Shunta OGATA, Hideki SHIMADA, Takashi SASAOKA, Akihiro HAMANAKA, Ginting Jalu KUSUMA, Effects of pH-Induced Changes in Soil Physical Characteristics on the Development of Soil Water Erosion, Geosciences, doi:10.3390/geosciences8040134, 8, 4, 2018.04.
13. Fa-qiang SU, Akihiro HAMANAKA, Ken-ichi ITAKURA, Wenyan ZHANG, Gota DEGUCHI, Kohki SATOH, Kazuhiro TAKAHASHI, Jun-ichi KODAMA, Monitoring and evaluation of simulated underground coal gasification in an ex-situ experimental artificial coal seam system, Applied Energy, 223, 82-92, 2018.04, In this study, to better simulate underground coal gasification (UCG), an artificial coal seam was constructed to
use as a simulated underground gasifier, which comprised coal blocks excavated from the coal seam. This study
reports the process and results of three independently designed experiments using coaxial-hole and linking-hole
UCG models: (a) a coaxial model using a coaxial pipeline as a gasification channel, (b) a coaxial model using the
coaxial pipeline combined with a bottom cross-hole, and (c) a linking-hole model using a horizontal V-shaped
cross-hole. In the present work, the fracturing activities and cavity growth inside the reactor were monitored
with acoustic emission (AE) technologies. During the process, the temperature profiles, gas production rate, and
gas content were measured successively. The results show that AE activities monitored during UCG process are
significantly affected by operational variables such as feed gas rate, feed gas content, and linking-hole types.
Moreover, the amount of coal consumed during UCG process were estimated using both of the stoichiometric
approach and balance computation of carbon (C) based on the product gas contents. A maximum error of less
than 10% was observed in these methods, in which the gas leakage was also considered. This demonstrates that
the estimated results using the proposed stoichiometric approach could be useful for evaluating energy recovery
during UCG..
14. Akihiro HAMANAKA, Takashi Sasaoka, Hideki Shimada, Study on Soil Spread at Rehabilitation Area for Promotion of Plant Growth in Open Cut Coal Mine in Kalimantan Area in Indonesia, Asian Journal of Environment & Ecology, DOI : 10.9734/AJEE/2017/37291, 4, 2017.11.
15. Zhiyi ZHANG, Hideki SHIMADA, Takashi SASAOKA, Akihiro HAMANAKA, Stability Control of Retained Goaf-Side Gateroad under Different Roof Conditions in Deep Underground Y Type Longwall Mining, Sustainability, doi:10.3390/su9101671, 9, 10, 2017.09.
16. Akihiro HAMANAKA, Ken-ichi ITAKURA, Fa-qiang SU, Kazuhiro TAKAHASHI, Kohki SATOH, Jun-ichi KODAMA, Gota DEGUCHI, Experimental Study on The Compact Underground Coal Gasification System with A Horizontal Well, Proc. of the 26th International Symposium on Mine Planning and Equipment Selection, 329-333, 2017.08.
17. Akihiro HAMANAKA, Ken-ichi ITAKURA, Faqiang SU, Gota DEGUCHI, Jun-ichi KODAMA, Application of Acoustic Emission Monitoring during Underground Coal Gasification, Proc. of 2017 ISRM Young Scholars’ Symposium on Rock Mechanics (YSRM 2017) & 2017 International Conference on New Development in Rock Mechanics and Geotechnical Engineering (NDRMGE 2017), USB memory, 2017.05.
18. Akihiro HAMANAKA, Ken-ichi ITAKURA, Fa-qiang SU, Kazuhiro TAKAHASHI, Kohki SATOH, Yukio HAMA, Wenyan ZHANG, Jun-ichi KODAMA, Gota DEGUCHI, Field Underground Coal Gasification (UCG) Experiment: Trial 1, Proc. of Joint Seminar on Environmental Science and Disaster Mitigation Research 2017, 129-130, 2017.03.
19. Akihiro HAMANAKA, Fa-qiang SU, Ken-ichi ITAKURA, Kazuhiro TAKAHASHI, Jun-ichi KODAMA, Gota DEGUCHI, Effect of injection flow rate on product gas quality in underground coal gasification (UCG) based on laboratory scale experiment
Development of co-axial UCG system, Energies, 10.3390/en10020238, 10, 2, 2017.01, 同軸型UCGシステムの確立のため、室内石炭地下ガス化モデル実験を行い、注入ガスの流量が生成ガス質に与える影響に関して検討した。その結果、注入ガス量を制御することで、生成ガス質が制御し得ることが明らかとなった。.
20. Fa-qiang SU, Akihiro HAMANAKA, Ken-ichi ITAKURA, Gota DEGUCHI, Kohki SATOH, Jun-ichi KODAMA, Evaluation of coal combustion zone and gas energy recovery for underground coal gasification (UCG) process, Energy & Fuels, 10.1021/acs.energyfuels.6b01922, 31, 1, 154-169, 2017.01.
21. Akihiro HAMANAKA, Ken-ichi ITAKURA, Faqiang SU, Kazuhiro TAKAHASHI, Kouki SATOH, Gota DEGUCHI, and Jun-ichi KODAMA, Model Experiment for Co-axial Underground Coal Gasification System Development, Proc. of 24th World Mining Congress (Sustainability in mining), 326-336, 2016.10.
22. Akihiro HAMANAKA, Fa-qiang SU, Ken-ichi ITAKURA, Kohki SATOH, Kazuhiro TAKAHASHI, Gota DEGUCHI, Jun-ichi KODAMA, Koutarou OHGA, Ex-situ Model Experiment for Development of Compact Underground Coal Gasification (UCG) System, Modern Environmental Science and Engineering, Doi: 10.15341/mese, 2, 9, 599-605, 2016.09.
23. Akihiro HAMANAKA, Ken-ichi ITAKURA, Faqiang SU, Gota DEGUCHI, Jun-ichi KODAMA, Underground coal gasification with monitoring technique by using acoustic emission, Proc. of 6th International Symposium on Energy Challenges and Mechanics, Online, 2016.08.
24. Akihiro HAMANAKA, Ken-ichi ITAKURA, Faqiang SU, Numerical Simulation on Product Gas of Underground Coal Gasification Based on Laboratory Scale Experiment, Proc. of First International Conference Mining in Europe, 34, 2016.05.
25. Akihiro HAMANAKA, Ken-ichi ITAKURA, Faqiang SU, Gota DEGUCHI, Preparation of Field Underground Coal Gasification (UCG) Test, Proc. of Joint Seminar on Environmental Science and Disaster Mitigation Research 2016, 12-13, 2016.03.
26. Akihiro HAMANAKA, Ken-ichi ITAKURA, Faqiang SU, Kouki SATOH, Kazuhiro TAKAHASHI, Gota DEGUCHI, Jun-ichi KODAMA, Koutarou OHGA, Development of Compact Underground Coal Gasification (UCG) System as a Local Energy Resource, Proc. of International Symposium on Earth Science and Technology 2015, 8-13, 2015.12.
27. Akihiro HAMANAKA, Hideki SHIMADA, Takashi SASAOKA, Yasuhiro YOSHIDA, Shuichi FUJITA, Material for construction of seabed structures using fly ash-surfactant mixtures, Proc. of the 23rd International Symposium on Mine Planning and Equipment Selection, 955-964, 2015.11.
28. Akihiro HAMANAKA, Hideki SHIMADA, Takashi SASAOKA, Study on method for minimizing soil erosion in open-cut mines in tropical regions, Proc. of 34th International Conference on Ground Control in Mining (China 2015), 230-236, 2015.10.
29. Akihiro HAMANAKA, Hideki SHIMADA, Shunta OGATA, Takashi SASAOKA, Ikuo MIYAJIMA, Utilization of Coal Ash for Preparation of Seedbed in Disturbed Land in Indonesian Open Cut Coal Mine, Proc. of 19th Conference on Environment and Mineral Processing, 103-110, 2015.06.
30. Akihiro HAMANAKA, Naoya INOUE, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, Ikuo MIYAJIMA, Design of self-sustainable land surface against soil erosion at rehabilitation areas in open-cut mines in tropical regions, International Journal of Mining, Reclamation and Environment, 29, 4, 305-315, 2015.04.
31. Akihiro HAMANAKA, Naoya INOUE, Shinji MATSUMOTO, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, Ikuo MIYAJIMA, Rehabilitation of Open Cut Coal Mine with Paper Mulberry (Broussonetia Papyrifera) in Indonesia, INZYNIERIA MINERALNA Journal of the Polish Mineral Enginering Society, 15, 2(34), 159-163, 2014.12.
32. Akihiro HAMANAKA, Naoya INOUE, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, Ikuo MIYAJIMA, Assessment of Soil Erosion at Rehabilitation Area in Tropical Regions Based on Laboratory Experiment, Proc. of International Symposium on Earth Science and Technology 2014, 175-180, 2014.12.
33. Akihiro HAMANAKA, Naoya INOOUE, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, An Evaluation on Mixture Materials Using Overburden and Flyash as Cover Layer for Acid Mine Drainage Prevention and Underlying Materials of Seedbed in Indonesian Coal Mine, Research Journal of Environmental and Earth Sciences, 6, 10, 486-492, 2014.10.
34. Akihiro HAMANAKA, Naoya INOUE, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, An Experimental Study for Assessment of Soil Erosion at Rehabilitation Area in Indonesian Coal Mine, Proc. of the Beijing International Symposium Land Reclamation and Ecological Restoration, 171-175, 2014.10.
35. Akihiro HAMANAKA, Amarsailhan TSEDENDORJ, Naoya INOUE, Takashi SASAOKA, Hideki SHIMADA, Kikuo MATSUI, Current Geotechnical Issues in Open Cut Mining in Desert Area in Mongolia, Proc. of 33rd International Conference on Ground Control in Mining (China), 156-160, 2014.10.
36. Akihiro HAMANAKA, Naoya INOUE, Shinji NATSUMOTO, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, Ikuo MIYAJIMA, Revegetation for Utilization of Disturbed Land by Paper Mulberry in Indonesian Open Cut Mine, Proc. of 18th Conference on Environment and Mineral Processing, 29-35, 2014.05.
37. Akihiro HAMANAKA, Naoya INOUE, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, Ikuo MIYAJIMA, Several Considerations on Soil Erosion at the Rehabilitation Area in Indonesian Coal Mine, Proc. of International Symposium on Earth Science and Technology 2013, 347-351, 2013.12.
38. Akihiro HAMANAKA, Naoya INOUE, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, Ikuo MIYAJIMA, Study on Backfilling of Soil for Revegetation at the Rehabilitation Area in Indonesian Coal Mine, Proc. of the 22nd Mine Planning and Equipment Selection, 803-811, 2013.10.
39. Akihiro HAMANAKA, Naoya INOUE, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, Ikuyo MIYAJIMA, Fundamental Study on Revegetation of Post Mine Surface by Paper Mullberry in Open Cut Mine, Proc. of the 8th International Forum on Strategic Technology 2013, 550-554, 2013.06.
40. Akihiro HAMANAKA, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, Shuichi FUJITA, Ikuo MIYAJIMA, Effect of Mixture Materials Using Waste Rock and Flyash for the AMD Prevention and Vegetation, Proc. of the 21st International Symposium on Mine Planning and Equipment Selection, 279-290, 2012.11.
41. Akihiro HAMANAKA, Sri MARYATI, Jin OKAZAKI, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, The Experimental Study for Prediction of Soil Erosion in the Rehabilitation Area of Indonesia Coal Mine, Proc. of International Symposium on Earth Science and Technology 2012, 557-562, 2012.09.
42. Akihiro HAMANAKA, Ginting Jalu KUSUMA, Candra NUGRAHA, Takashi SASAOKA, Hideki SHIMADA, Ikuo MIYAJIMA, Shuichi FUJITA, Kikuo MATSUI, Fundamental Study on Application of Paper Mulberry for Rehabilitation of Surface Coal Mine in Indonesia, Proc. of International Symposium on Earth Science and Technology 2011, 419-422, 2011.12.
43. Akihiro HAMANAKA, Nay Zar LIN, Takashi SASAOKA, Hideki SHIMADA, Kikuo MATSUI, Hiroshi TAKAMOTO, Eco Underground Coal Mining Systems for Ultra-Thick Coal Seam - Utilisation of Flyash and CO2 Storage, Proc. of 2nd International Future Mining Conference 2011, 121-129, 2011.11.
44. Akihiro HAMANAKA, Takashi SASAOKA, Hideki SHIMADA, Kikuo MATSUI, Hiroshi TAKAMOTO, Application of Punch Mining System to Indonesian Coal Mining Industry, Proc. of the 20th International Symposium on Mine Planning and Equipment Selection, 187-197, 2011.10.
45. Akihiro HAMANAKA, Takashi SASAOKA, Hideki SHIMADA, Kikuo MATSUI, Hiroshi TAKAMOTO, Pinyo MEECHUMNA, Pipat LAOWATTANABANDIT, Study on Applicable Highwall Mining System for Thick and Weak Coal Seams, Proc. of 5th International Workshop and Conference on Earth Resources Technology, 102-106, 2011.05.
46. Akihiro HAMANAKA, Takashi SASAOKA, Hideki SHIMADA, Kikuo MATSUI, Hiroshi TAKAMOTO, Pinyo MEECHUMNA, Pipat LAOWATTANABANDIT, Application of Multi Slicing Highwall Mining System with Stowing at Surface Coal Mine at Thailand, Proc. of 19th International Symposium on Mine Planning & Equipment Selection, 719-727, 2010.12.
47. Akihiro HAMANAKA, Takashi SASAOKA, Hideki SHIMADA, Kikuo MATSUI, Hiroshi TAKAMOTO, Pinyo MEECHUMNA, Pipat LAOWATTANABANDIT, Application of Multi-Slicing Highwall Mining System with Stowing at Surface Coal Mine in Thailand, Proc. of International Symposium on Earth Science and technology 2010, 57-60, 2010.12.
48. Akihiro HAMANAKA, Takashi SASAOKA, Hideki SHIMADA, Kikuo MATSUI, Hiroshi TAKAMOTO, Pinyo MEECHUMNA, Pipat LAOWATTANABANDIT, Application of Highwall Mining System at Surface Coal Mine in Thailand, Proc. of 29th International Conference on Ground Control in Mining, 301-311, 2010.07.
49. Akihiro HAMANAKA, Takashi SASAOKA, Hideki SHIMADA, Kikuo MATSUI, Hiroshi TAKAMOTO, Pinyo MEECHUMNA, Pipat LAOWATTANABANDIT, Application of Highwall Mining System at Surface Coal Mine in Thailand, Proc. of the 4th International Workshop and Conference on Earth Resources Technology, CD-ROM, 2010.05.
Presentations
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1. Akihiro HAMANAKA, Fa-qiang SU, Ken-ichi ITAKURA, Kazuhiro TAKAHASHI, Jun-ichi KODAMA, Gota DEGUCHI , Large-scale Laboratory Experiment on Development of Underground Coal Gasification with Horizontal Well , The 5th ISRM Young Scholars' Symposium on Rock Mechanics & International Symposium on Rock Engineering for Innovative Future, 2019.12, Underground coal gasification (UCG) is a technique to recover coal energy by the in-situ conversion of coal into gaseous products. In this study, an application of co-axial UCG system with a horizontal well is discussed by means of the model UCG experiment with a large-scale simulated coal seam which the size is 550 × 600 × 2,740 mm. A horizontal well which has 45 mm diameter is used as an injection/production well. The effect of injection rate is evaluated by using the results of gas compositions, temperature profile, and acoustic emission monitoring. During the experiment, the changes of temperature field and product gas compositions were observed by changing the position of an injection pipe, meaning that it is possible to control gasification area and the quality of product gas by controlling the injection position. Additionally, the increase of injection rate attribute to improve the calorific value of product gas while the higher flow rate may cause to move the gasification area rapidly when the coal with higher ash is gasified..
2. Akihiro HAMANAKA, Han Huor OENG, Kazuki MAEHARA, Takashi SASAOKA, Hideki SHIMADA, Toru SATO, Effects of Lubricants in Over-cutting Area of Pipe Roof Method on Reducing Surface Settlement, VCRES 2019 international symposium, 2019.11.
3. Akihiro HAMANAKA, Hiroto YAMASAKI, Takashi SASAOKA, Hideki SHIMADA, Shinji MATSUMOTO, Application of Fly Ash to Acidic Soil to Improve Plant Growth in Disturbed Land of Open-cut Mining, 18th Symposium on Environmental Issues and Waste Management in Energy and Mineral Production, 2018.11, The amount of fly ash disposed as industrial wastes is increasing with increasing coal demands all over the world. Although fly ash is generally disposed by landfill, the demand of effective utilization of them is increasing because of the limitation of the disposal site. 80 % of coal ash is utilized such as a material for cements though less of them are disposed by landfill. Considering the preparation of landfill area and environmental issues, it is very meaningful to discuss the utilization of fly ash except a cement usage. Most of coal is mined by open-pit mining method in Indonesia. A broad post-mining area is built after the mining operation. The broad area has to be revegetated in terms of environmental conservation. However, soil acidification caused by mixing acid sulfate rocks or soils mined in the operation influences the revegetation. As the plant growth is inhibited under the acidic conditions, the utilization of fly ash which has higher neutralizing capacity due to its alkalinity is expected in order to improve the conditions of seedbed in the revegetation area. In this paper, the utilization of fly ash for preparation of seedbed in disturbed land in Indonesian open cut coal mine is discussed by means of laboratory pot trials by using simulated acidic soil with a mixture of pyrite, fly ash which has higher alkalinity, and Acacia mangium which is a typical species planted for fast growing tree in Indonesia. The results suggested that the appropriate mixture of fly ash to neutralize the acidic soil can be improved the plant growth under the acidic condition..
4. Akihiro HAMANAKA, Ken-ichi ITAKURA, Fa-qiang SU, Gota DEGUCHI, Jun-ichi KODAMA, Estimation of Gasification Area of Underground Coal Gasification by using Acoustic Emission Monitoring, 10th Asian Rock Mechanics Symposium, 2018.10.
5. Akihiro HAMANAKA, Ken-ichi ITAKURA, Fa-qiang SU, Jun-ichi KODAMA, Gota DEGUCHI, Several Considerations on Application of Underground Coal Gasification (UCG) with High Efficiency and Safety, 25th World Mining Congress, 2018.06.
6. Akihiro HAMANAKA, Ken-ichi ITAKURA, Fa-qiang SU, Kazuhiro TAKAHASHI, Kohki SATOH, Jun-ichi KODAMA, Gota DEGUCHI, Experimental Study on The Compact Underground Coal Gasification System with A Horizontal Well, 26th International Symposium on Mine Planning and Equipment Selection, 2017.08.
7. Akihiro HAMANAKA, Ken-ichi ITAKURA, Faqiang SU, Gota DEGUCHI, Jun-ichi KODAMA, Application of Acoustic Emission Monitoring during Underground Coal Gasification, 2017 ISRM Young Scholars’ Symposium on Rock Mechanics (YSRM 2017) & 2017 International Conference on New Development in Rock Mechanics and Geotechnical Engineering (NDRMGE 2017), 2017.05.
8. Akihiro HAMANAKA, Ken-ichi ITAKURA, Fa-qiang SU, Kazuhiro TAKAHASHI, Kohki SATOH, Yukio HAMA, Wenyan ZHANG, Jun-ichi KODAMA, Gota DEGUCHI, Field Underground Coal Gasification (UCG) Experiment: Trial 1, Joint Seminar on Environmental Science and Disaster Mitigation Research 2017, 2017.03.
9. Akihiro HAMANAKA, Ken-ichi ITAKURA, Faqiang SU, Kazuhiro TAKAHASHI, Kouki SATOH, Gota DEGUCHI, and Jun-ichi KODAMA, Model Experiment for Co-axial Underground Coal Gasification System Development, 24th World Mining Congress (Sustainability in mining), 2016.10.
10. Akihiro HAMANAKA, Ken-ichi ITAKURA, Faqiang SU, Gota DEGUCHI, Jun-ichi KODAMA, Underground coal gasification with monitoring technique by using acoustic emission, 6th International Symposium on Energy Challenges and Mechanics, 2016.08.
11. Akihiro HAMANAKA, Ken-ichi ITAKURA, Faqiang SU, Numerical Simulation on Product Gas of Underground Coal Gasification Based on Laboratory Scale Experiment, First International Conference Mining in Europe, 2016.05.
12. Akihiro HAMANAKA, Ken-ichi ITAKURA, Faqiang SU, Gota DEGUCHI, Preparation of Field Underground Coal Gasification (UCG) Test, Joint Seminar on Environmental Science and Disaster Mitigation Research 2016, 2016.03.
13. Akihiro HAMANAKA, Ken-ichi ITAKURA, Faqiang SU, Kouki SATOH, Kazuhiro TAKAHASHI, Gota DEGUCHI, Jun-ichi KODAMA, Koutarou OHGA, Development of Compact Underground Coal Gasification (UCG) System as a Local Energy Resource, International Symposium on Earth Science and Technology 2015, 2015.12.
14. Akihiro HAMANAKA, Hideki SHIMADA, Takashi SASAOKA, Yasuhiro YOSHIDA, Shuichi FUJITA, Material for construction of seabed structures using fly ash-surfactant mixtures, 23rd International Symposium on Mine Planning and Equipment Selection, 2015.11.
15. Akihiro HAMANAKA, Hideki SHIMADA, Takashi SASAOKA, Study on method for minimizing soil erosion in open-cut mines in tropical regions, 34th International Conference on Ground Control in Mining (China 2015), 2015.10.
16. Akihiro HAMANAKA, Hideki SHIMADA, Shunta OGATA, Takashi SASAOKA, Ikuo MIYAJIMA, Utilization of Coal Ash for Preparation of Seedbed in Disturbed Land in Indonesian Open Cut Coal Mine, 19th Conference on Environment and Mineral Processing, 2015.06.
17. Akihiro HAMANAKA, Naoya INOUE, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, Ikuo MIYAJIMA, Assessment of Soil Erosion at Rehabilitation Area in Tropical Regions Based on Laboratory Experiment, International Symposium on Earth Science and Technology 2014, 2014.12.
18. Akihiro HAMANAKA, Amarsailhan TSEDENDORJ, Naoya INOUE, Takashi SASAOKA, Hideki SHIMADA, Kikuo MATSUI, Current Geotechnical Issues in Open Cut Mining in Desert Area in Mongolia, 33rd International Conference on Ground Control in Mining (China), 2014.10.
19. Akihiro HAMANAKA, Naoya INOUE, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, An Experimental Study for Assessment of Soil Erosion at Rehabilitation Area in Indonesian Coal Mine, Beijing International Symposium Land Reclamation and Ecological Restoration, 2014.10.
20. Akihiro HAMANAKA, Naoya INOUE, Shinji NATSUMOTO, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, Ikuo MIYAJIMA, Revegetation for Utilization of Disturbed Land by Paper Mulberry in Indonesian Open Cut Mine, 18th Conference on Environment and Mineral Processing, 2014.05.
21. Akihiro HAMANAKA, Naoya INOUE, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, Ikuo MIYAJIMA, Several Considerations on Soil Erosion at the Rehabilitation Area in Indonesian Coal Mine, International Symposium on Earth Science and Technology 2013, 2013.12.
22. Akihiro HAMANAKA, Naoya INOUE, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, Ikuo MIYAJIMA, Study on Backfilling of Soil for Revegetation at the Rehabilitation Area in Indonesian Coal Mine, 22nd Mine Planning and Equipment Selection, 2013.10.
23. Akihiro HAMANAKA, Naoya INOUE, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, Ikuyo MIYAJIMA, Fundamental Study on Revegetation of Post Mine Surface by Paper Mullberry in Open Cut Mine, 8th International Forum on Strategic Technology 2013, 2013.06.
24. Akihiro HAMANAKA, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, Shuichi FUJITA, Ikuo MIYAJIMA, Effect of Mixture Materials Using Waste Rock and Flyash for the AMD Prevention and Vegetation, 21st International Symposium on Mine Planning and Equipment Selection, 2012.11.
25. Akihiro HAMANAKA, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, Shuichi FUJITA, Ikuo MIYAJIMA, Effect of mixture materials using waste rock and flyash for the AMD prevention and vegetation, The 9th International Symposium on Novel Carbon Resource Science, 2012.11.
26. Akihiro HAMANAKA, Sri MARYATI, Jin OKAZAKI, Hideki SHIMADA, Takashi SASAOKA, Kikuo MATSUI, The Experimental Study for Prediction of Soil Erosion in the Rehabilitation Area of Indonesia Coal Mine, International Symposium on Earth Science and Technology 2012, 2012.09.
27. Akihiro HAMANAKA, Ginting Jalu KUSUMA, Candra NUGRAHA, Takashi SASAOKA, Hideki SHIMADA, Ikuo MIYAJIMA, Shuichi FUJITA, Kikuo MATSUI, Fundamental Study on Application of Paper Mulberry for Rehabilitation of Surface Coal Mine in Indonesia, International Symposium on Earth Science and Technology 2011, 2011.12.
28. Akihiro HAMANAKA, Nay Zar LIN, Takashi SASAOKA, Hideki SHIMADA, Kikuo MATSUI, Hiroshi TAKAMOTO, Eco Underground Coal Mining Systems for Ultra-Thick Coal Seam - Utilisation of Flyash and CO2 Storage, 2nd International Future Mining Conference 2011, 2011.11.
29. Akihiro HAMANAKA, Takashi SASAOKA, Hideki SHIMADA, Kikuo MATSUI, Hiroshi TAKAMOTO, Application of Punch Mining System to Indonesian Coal Mining Industry, 20th International Symposium on Mine Planning and Equipment Selection, 2011.10.
30. Akihiro HAMANAKA, Takashi SASAOKA, Hideki SHIMADA, Kikuo MATSUI, Hiroshi TAKAMOTO, Pinyo MEECHUMNA, Pipat LAOWATTANABANDIT, Study on Applicable Highwall Mining System for Thick and Weak Coal Seams, 5th International Workshop and Conference on Earth Resources Technology, 2011.05.
31. Akihiro HAMANAKA, Takashi SASAOKA, Hideki SHIMADA, Kikuo MATSUI, Hiroshi TAKAMOTO, Pinyo MEECHUMNA, Pipat LAOWATTANABANDIT, Application of Multi-Slicing Highwall Mining System with Stowing at Surface Coal Mine in Thailand, International Symposium on Earth Science and technology 2010, 2010.12.
32. Akihiro HAMANAKA, Takashi SASAOKA, Hideki SHIMADA, Kikuo MATSUI, Hiroshi TAKAMOTO, Pinyo MEECHUMNA, Pipat LAOWATTANABANDIT, Application of Multi Slicing Highwall Mining System with Stowing at Surface Coal Mine at Thailand, 19th International Symposium on Mine Planning & Equipment Selection, 2010.12.
33. Akihiro HAMANAKA, Takashi SASAOKA, Hideki SHIMADA, Kikuo MATSUI, Hiroshi TAKAMOTO, Pinyo MEECHUMNA, Pipat LAOWATTANABANDIT, Application of Highwall Mining System at Surface Coal Mine in Thailand, 29th International Conference on Ground Control in Mining, 2010.07.
34. Akihiro HAMANAKA, Takashi SASAOKA, Hideki SHIMADA, Kikuo MATSUI, Hiroshi TAKAMOTO, Pinyo MEECHUMNA, Pipat LAOWATTANABANDIT, Application of Highwall Mining System at Surface Coal Mine in Thailand, 4th International Workshop and Conference on Earth Resources Technology, 2010.05.
Membership in Academic Society
  • Japanese Society for Rock Mechanics
  • Japanese Society of Agricultural Technology Management
  • The Mining and Materials Processing Institute of Japan


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