Geosciences Journal

The Association of Korean Geoscience Societies (한국지질과학협의회)
권호 표지
DOI QR코드

DOI QR Code

Protection scope and gas extraction of the low-protective layer in a thin coal seam: lessons from the DaHe coalfield, China

  • Cao, Zuoyong (Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education) ;
  • He, Xueqiu (School of Safety Engineering, China University of Mining & Technology) ;
  • Wang, Enyuan (Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education) ;
  • Kong, Biao (Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education)
  • Received : 2017.05.13
  • Accepted : 2017.11.01
  • Published : 2018.06.01
⟨ Previous Next ⟩

Abstract

Aiming at promoting thin coal seam pressure relief gas extraction, as well as delimiting the protection range of the low-protective layer in thin coal seam, in this paper, we simulated the changing process of the protective layer stress field and deformation field during the low-protective layer mining and obtained the characteristics of the displacement as well as the stress varied characteristics of the overlying strata in the low-protective layer mining. According to the protection layer mining stress relief and the deformation protection criterion, the tendency and trend of the protection layer protection scope were determined, and the theoretical calculation results were basically consistent with the direction protection angle of the protected coal seam. Taking the Dahe (DH) coalmine as an example, the floor rock roadway as the gas drainage roadway to extraction gas as well as the scheme of gas extraction and pressure relief in the upper and lower layers of the protective layer were implemented. The effect of gas control scheme showed that the working gas concentration reached the mining requirement. We finally established the low-protective layer in thin coal mining integrated technical scheme of protection scope and pressure relief gas extraction.

Keywords

Acknowledgement

Supported by : Central Universities

References

  1. Dong, G.W., 2013, The preventing coal and gas outburst technology of middle distance and low permeability and upper protective layer. Advanced Materials Research, 690, 3059-3067.
  2. Fu, J. and Cheng, Y., 2007, Present situation of coal and gas outburst in Chinese coal mines and its prevention. Journal of Mining & Safety Engineering, 1, 253-259.
  3. Hu, Q., Zhou, S., and Zhou, X., 2008, Mechanical mechanism of coal and gas outburst. Journal of China Coal Society, 33, 1368-1372.
  4. Huang, B., Zhao, X., and Zhang, Q., 2016, Framework of the theory and technology for simultaneous mining of coal and its associated resources. Journal of China University of Mining & Technology, 45, 653-662.
  5. Jin, K., Cheng, Y., Wang, W., Liu, H., Liu, Z., and Zhang, H., 2016, Evaluation of the remote lower protective seam mining for coal mine gas control: a typical case study from the Zhuxianzhuang Coal Mine, Huaibei Coalfield, China. Journal of Natural Gas Science & Engineering, 33, 44-55. https://doi.org/10.1016/j.jngse.2016.05.004
  6. Kong, B., Wang, E., Li, Z., Wang, X., Liu, X., Li, N., and Yang, Y., 2016, Electromagnetic radiation characteristics and mechanical properties of deformed and fractured sandstone after high temperature treatment. Engineering Geology, 209, 82-92. https://doi.org/10.1016/j.enggeo.2016.05.009
  7. Lama, R.D. and Bodziony, J., 1998, Management of outburst in underground coal mines. International Journal of Coal Geology, 35, 83-115. https://doi.org/10.1016/S0166-5162(97)00037-2
  8. Li, Q., Lin, B., and Zhai, C., 2015, A new technique for preventing and controlling coal and gas outburst hazard with pulse hydraulic fracturing: a case study in Yuwu coal mine, China. Natural Hazards, 75, 2931-2946. https://doi.org/10.1007/s11069-014-1469-9
  9. Li, Z., 1997, Mechanism of coal and gas outburst and its occurrence condition. Coal Science and Technology, 11, 44-47.
  10. Li, P., 1989, Hypothesis of coal and gas outburst mechanism: hypothesis of two phases. Coal Mine Safety, 11, 29-35.
  11. Li, X. and Lin, B., 2010, Research status and analysis of coal and gas outburst mechanism. Coal Geology & Exploration, 38, 7-13.
  12. Li, H., Li, S., and Tan, Y., 2015, Research status and trend of protective layer mining of coal seam group. Mining Engineering Research, 30, 45-49.
  13. Liu, H., Liu, H., and Cheng, Y., 2014, The elimination of coal and gas outburst disasters by ultrathin protective seam drilling combined with stress-relief gas drainage in Xinggong coalfield. Journal of Natural Gas Science & Engineering, 21, 837-844. https://doi.org/10.1016/j.jngse.2014.10.022
  14. Liu, H., Cheng, Y., Wang, H., and Shang, Z., 2009, Change rule of initial speed of gas emission from borehole in outburst coal seam before and after pressure relief. Journal of Mining and Safety Engineering, 26, 225-228.
  15. Liu, T., Lin, B., Zou, Q., and Zhu, C., 2016, Microscopic mechanism for enhanced coal bed methane recovery and outburst elimination by hydraulic slotting: a case study in Yangliu mine, China. Greenhouse Gases Science & Technology, 6, 597-614. https://doi.org/10.1002/ghg.1591
  16. Mareshev, Н., 2008, Prediction methods and prevention measures of coal and gas outburst. Earthquake Press, Beijing, 358 p.
  17. Mohamed, K.M., Murphy, M., Lawson, H.E., and Klemetti, T., 2016, Analysis of the current rib support practices and techniques in U.S. coal mines. International Journal of Mining Science & Technology, 26, 77-87. https://doi.org/10.1016/j.ijmst.2015.11.014
  18. Tu, Q., Cheng, Y., Guo, P., Jiang, J., Wang, L., and Zhang, R., 2016, Experimental study of coal and gas outbursts related to gas-enriched areas. Rock Mechanics & Rock Engineering, 49, 3769-3781. https://doi.org/10.1007/s00603-016-0980-6
  19. Tang, J., Pan, Y., and Yang, S., 2013, Experimental study of coal and gas outburst under tridimensional stresses. Chinese Journal of Rock Mechanics & Engineering, 32, 960-965.
  20. Tu. M., Huang, N.B., and Liu, B.A., 2007, Research on pressure-relief effect of overlying coal rock body using far distance lower protective seam exploitation method. Journal of Mining & Safety Engineering, 24,418-421.
  21. Verma, S. and Chaudhari, S., 2016, Highlights from the literature on risk assessment techniques adopted in the mining industry: a review of past contributions, recent developments and future scope. International Journal of Mining Science & Technology, 26, 691-702. https://doi.org/10.1016/j.ijmst.2016.05.023
  22. Wang, E., Kong, B., Liang, J., Liu, X., and Liu, Z., 2016, Experimental study on EMR effect of coal heating. Journal of China University of Mining & Technology, 45, 205-210.
  23. Wang, H., Huang, G., Yuan, Z., Shu, C., and Zhong, H., 2014, Model of gas-solid coupling and protection range for gas flow in steeply inclined upper protective layer mining. Rock and Soil Mechanics, 5, 1377-1382.
  24. Wen, Z.J., Tan, Y.L., Han, Z.Z., and Meng, F.B., 2016a, Construction of time-space structure model of deep stope and stability analysis. Polish Journal of Environmental Studies, 25, 2633-2640. https://doi.org/10.15244/pjoes/63779
  25. Wen, Z., Wang, X., Tan, Y., Zhang, H., Huang, W., and Li, Q., 2016, A study of rock burst hazard evaluation method in coal mine. Shock & Vibration, 16, 1-9.
  26. Wen, Z.J., Wang, X., Li, Q.H., and Jiang, Y.J., 2016c, Simulation analysis on the strength and acoustic emission characteristics of jointed rock mass. Tehnicki vjesnik - Technical Gazette, 23, 51277-51284.
  27. Xiang, W., Cheng, W.Y., and Yi, M., 2011, Research on establishing the indexes system of controlling the coal and gas outburst accident. Procedia Engineering, 26, 2018-2026. https://doi.org/10.1016/j.proeng.2011.11.2399
  28. Xie, J.L. and Xu, J.L., 2017, Effect of key stratum on the mining abutment pressure of a coal seam. Geosciences Journal, 21, 267-276. https://doi.org/10.1007/s12303-016-0044-7
  29. Xue, Y., Gao, F., Gao, Y., Cheng, H., Liu, Y., Hou, P., and Teng, T., 2016, Quantitative evaluation of stress-relief and permeability-increasing effects of overlying coal seams for coal mine methane drainage in Wulan coal mine. Journal of Natural Gas Science & Engineering, 32, 122-137. https://doi.org/10.1016/j.jngse.2016.04.029
  30. Xue, Y., Gao, F., and Liu, X., 2015, Effect of damage evolution of coal on permeability variation and analysis of gas outburst hazard with coal mining. Natural Hazards, 79, 1-15.
  31. Yu, B.F., 1985, Mechanism of Coal and gas outburst. Coal Industry Press, Beijing, 282 p.
  32. Yuan, L. and Xue, S., 2014, Coal seam gas content method to determine the protective layer mining outburst range of technology and application. Journal of China Coal Society, 39, 1786-1791.
  33. Yang, W., Lin, B., Gao, Y., Lv, Y., Wang, Y., Mao, X., Wang, N., Wang, D., and Wang, Y., 2015, Optimal coal discharge of hydraulic cutting inside coal seams for stimulating gas production: a case study in Pingmei coalfield. Journal of Natural Gas Science & Engineering, 28, 379-388.
  34. Yang, Y., Chen, C., and Li, C., 2010, Coal and gas outburst prediction and prevention measures. Journal of Liaoning Technical University, 29, 5-7.
  35. You, X., Liu, G., and Zhang, H., 2011, Coal and gas outburst protective layer mining technology research status quo. Shanxi Cooking Coal Science & Technology, 35, 16-18.
  36. Yu, J.H., Choi, J.H., Shinn, Y.J., and Lee, D.S., 2016, Hydraulic properties measurement of tight sandstone for $CO_2$ geological storage. Geosciences Journal, 20, 551-559. https://doi.org/10.1007/s12303-015-0063-9
  37. Yuan, L., Xue, J., and Zhang, N., 2013, The status quo and prospect of coal bed methane extraction and key technology of coal and gas extraction. Coal Science and Technology, 41, 6-11.
  38. Yuan, L., 2016, China's deep coal and gas a total of mining strategic thinking. Journal of China Coal Society, 1, 1-6.
  39. Yu, Q.X., 2012, Coal mine gas control. China University of Mining and technology press, Xuzhou, 371 p.
  40. Zhai, C., Xiang, X., Xu, J., and Wu, S., 2016, The characteristics and main influencing factors affecting coal and gas outbursts in Chinese Pingdingshan mining region. Natural Hazards, 82, 507-530. https://doi.org/10.1007/s11069-016-2195-2
  41. Zhang, Z., Wang, E., and Li, N., 2017, Temporal and spatial characteristics of coal-mine microseism based on single-link cluster. Geosciences Journal, 21, 223-233. https://doi.org/10.1007/s12303-016-0038-5
  42. Zhou, S. and He, X., 1990, The rheological hypothesis of coal and gas outburst Mechanism. Journal of China University of Mining & Technology, 2, 1-7.

Cited by

  1. Study on the distribution law of stress deviator below the floor of a goaf vol.21, pp.3, 2018, https://doi.org/10.12989/gae.2020.21.3.301
  2. Physical simulation of upper protective coal layer mining with different coal seam inclinations vol.8, pp.9, 2020, https://doi.org/10.1002/ese3.740
  3. Study on Deformation and Failure Characteristics of Surrounding Rock of Overlying Roadway under Upward Mining in the Deep Mine vol.2021, pp.None, 2018, https://doi.org/10.1155/2021/5667183
  4. Numerical and Similarity Simulation Study on the Protection Effect of Composite Protective Layer Mining with Gently Inclined Thick Coal Seam vol.2021, pp.None, 2018, https://doi.org/10.1155/2021/6679199
  5. Stress Distribution and Gas Concentration Evolution during Protective Coal Seam Mining vol.2021, pp.None, 2018, https://doi.org/10.1155/2021/6644142
  6. Analysis of the Influence of Upper Protective Layer Mining on the Effect of Pressure Relief and Protection of Coal and Rock Masses between the Lower Overburden Layers vol.2021, pp.None, 2018, https://doi.org/10.1155/2021/8682156
  7. Influence of hard-roof on gas accumulation in overlying strata: A case study vol.90, pp.None, 2018, https://doi.org/10.1016/j.jngse.2021.103948
  8. Prediction of gas pressure in thin coal seams in the Qinglong Coal Mine in Guizhou Province, China vol.11, pp.11, 2018, https://doi.org/10.1007/s13202-021-01267-2
  9. Study on the optimal position of the roof low roadway based on the response surface methodology vol.11, pp.1, 2021, https://doi.org/10.1038/s41598-021-93997-w