Advertisement

Stress distribution characteristic analysis and control of coal and gas outburst disaster in a pressure-relief boundary area in protective layer mining

  • Zhen Liu
  • He YangEmail author
  • Weimin Cheng
  • Lin Xin
  • Guanhua Ni
Original Paper

Abstract

Coal and gas outburst disasters in coal seams are becoming more serious as coal mines extend deeper underground in China. Furthermore, the protective coal seam mining technology featured by economic efficiency has been proven to be the most effective and widely applied method for the prevention of coal and gas outburst disasters. However, the determinations of the protective area coal and gas outburst prevention in a pressure-relief boundary area are fundamental issues that research should be focused on. The technical method for determining stress distribution in pressure-relief boundary area during protective coal seam mining is put forward in this paper. The method is based on a stress-seepage coupled relationship within a gas-containing coal seam. The method includes complex lab experiments and on-site measurements at the Qingdong Coal Mine. The final data illustrate that the permeability and vertical stress in the pressure-relief boundary area of the coal sample form a negative exponential function relationship. Additionally, the permeability of the coal sample within the abovementioned area is significantly different compared with that located at the center of the pressure-relief area. In the pressure-relief boundary area, the gas pressure distribution gradient is 0.0375 MPa/m, while the vertical stress distribution gradient registers 0.56 MPa/m. Under this condition, coal and gas outburst disasters are prone to be triggered. Therefore, effective precautions against coal and gas outburst disasters can be put forward in accordance with stress distribution characteristics within the abovementioned “boundary area.”

Keywords

Protective coal seam Pressure-relief boundary Stress distribution Precautions against a coal and gas outburst 

Notes

Acknowledgements

This work was financially supported by National Natural Science Foundation of China (Project No.51604168, 51504142), Natural Science Foundation of Shandong Province (CN) (Project No.ZR2014EEQ038, ZR2016EEQ18), China Postdoctoral Science Foundation funded project (Project No.2016 M592222), Specialized Support for the Postdoctoral Application Research Program of Qingdao (Project No.2016123), and Scientific Research Foundation of Shandong University of Science and Technology for Recruited Talents (Project No.2015RCJJ046).

References

  1. An FH, Cheng YP, Wang L, Li W (2013) A numerical model for outburst including the effect of adsorbed gas on coal deformation and mechanical properties. Comput Geotech 54:222–231. doi: 10.1016/j.compgeo.2013.07.013 CrossRefGoogle Scholar
  2. Balucan RD, Turner LG, Steel KM (2016) Acid-induced mineral alteration and its influence on the permeability and compressibility of coal. J Nat Gas Sci Eng 33:973–987. doi: 10.1016/j.jngse.2016.04.023 CrossRefGoogle Scholar
  3. Beamish BB, Crosdale PJ (1998) Instantaneous outbursts in underground coal mines: an overview and association with coal type. Int J Coal Geol 35:27–55. doi: 10.1016/S0166-5162(97)00036-0 CrossRefGoogle Scholar
  4. Brandt J, Sdunowski R (2007) Gas drainage in high efficiency workings in German coal mines. In: Proceeding of 2007’ China (Huainan) international symposium on coal gas control technology. China university of mining and technology press. Xuzhou, pp 22–29Google Scholar
  5. Burra A, Esterle JS, Golding SD (2014) Horizontal stress anisotropy and effective stress as regulator of coal seam gas zonation in the Sydney Basin, Australia. Int J Coal Geol 132:103–116. doi: 10.1016/j.coal.2014.08.008 CrossRefGoogle Scholar
  6. Cao SG, Guo P, Li Y (2010) Effect of gas pressure on gas seepage of outburst coal. Journal of China Coal Society 35(4):595–599. doi: 10.13225/j.cnki.jccs.2010.04.025 Google Scholar
  7. Cervik J (1979) Methane control on longwalls—European and U.S. practices. Longwall-Shortwall Mining, Art. Society of Mining Engineers of American Institute of Mining, Metallurgical, and Petroleum Engineers, New York, pp 75–80Google Scholar
  8. Chatterjee R, Paul S (2013) Classification of coal seams for coal bed methane exploitation in central part of Jharia coalfield, India—a statistical approach. Fuel 111:20–29. doi: 10.1016/j.fuel.2013.04.007 CrossRefGoogle Scholar
  9. Clarkson CR, Bustin RM (1999) The effect of pore structure and gas pressure upon the transport properties of coal: a laboratory and modeling study. 1. Isotherms and pore volume distributions. Fuel 78(11):1333–1344. doi: 10.1016/S0016-2361(99)00055-1 CrossRefGoogle Scholar
  10. Connell LD (2016) A new interpretation of the response of coal permeability to changes in pore pressure, stress and matrix shrinkage. Int J Coal Geol 162:169–182. doi: 10.1016/j.coal.2016.06.012 CrossRefGoogle Scholar
  11. Cronshaw I, Grafton RQ (2016) A tale of two states: development and regulation of coal bed methane extraction in Queensland and New South Wales, Australia. Resour Policy 50:253–263. doi: 10.1016/j.resourpol.2016.10.007 CrossRefGoogle Scholar
  12. Danesh NN, Chen Z, Aminossadati SM, Kizil MS, Pan Z, Connell LD (2016) Impact of creep on the evolution of coal permeability and gas drainage performance. J Nat Gas Sci Eng 33:469–482. doi: 10.1016/j.jngse.2016.05.033 CrossRefGoogle Scholar
  13. Enever J R E,Henning A (1997) The relationship between permeability and effective stress for Australian coal and its implications with respect to coalbed methane exploration and reservoir modeling. Proceedings of the 1997 International Coalbed Methane Symposium. Tuscaloosa, pp 13–22Google Scholar
  14. Gray I (1987) Reservoir engineering in coal seams: part 1-The physical process of gas storage and movement in coal seams. Geol Soc Spec Publ 2:28–34. doi: 10.2118/12514-PA Google Scholar
  15. Harpalani S, Chen G (1995) Estimation of changes in fracture porosity of coal with gas emission. Fuel 74(10):1491–1498. doi: 10.1016/0016-2361(95)00106-F CrossRefGoogle Scholar
  16. Harpalani S, Schraufnage RA (1991) Shrinkage of coal matrix with release of gas and its impact on permeability of coal. Fuel 69(5):551–556. doi: 10.1016/0016-2361(90)90137-F CrossRefGoogle Scholar
  17. Hu GZ, Wang HT, Fan XG (2010) The law of methane gas leak flow in adjacent layer and its relief-pressure protection region. J China Coal Soc 10:1654–1659. doi: 10.13225/j.cnki.jccs.2010.10.025 Google Scholar
  18. Hu SB, Wang EY, Kong XG (2015) Damage and deformation control equation for gas-bearing coal and its numerical calculation method. J Nat Gas Sci Eng 25:166–179. doi: 10.1016/j.jngse.2015.04.039 CrossRefGoogle Scholar
  19. Hu SB, Wang EY, Li XC, Bai B (2016) Effects of gas adsorption on mechanical properties and erosion mechanism of coal. J Nat Gas Sci Eng 30:531–538. doi: 10.1016/j.jngse.2016.02.039 CrossRefGoogle Scholar
  20. Iwanec AMS, Carter JP, Hambleton JP (2016) Geomechanics of subsidence above single and multi-seam coal mining. J Rock Mech Geotech Eng 8(3):304–313. doi: 10.1016/j.jrmge.2015.11.007 CrossRefGoogle Scholar
  21. Ji HJ, Li ZH, Peng YJ, Yang YL, Tang YB, Liu Z (2014) Pore structures and methane sorption characteristics of coal after extraction with tetrahydrofuran. J Nat Gas Sci Eng 19:287–294. doi: 10.1016/j.jngse.2014.05.020 CrossRefGoogle Scholar
  22. Jiang CL (1988) Study of the methods for determining the permeability of the coal seams. J China Inst Min Technol 02:77–83Google Scholar
  23. Jiang FX, Yao SL, WeiD Q, Wang FQ, Hao YG, Wang DY, Feng Y (2015) Tremor mechanism and disaster control during repeated mining. J Min Saf Eng 03:349–355. doi: 10.13545/j.cnki.jmse.2015.03.001 Google Scholar
  24. Karacan CÖ (2008) Evaluation of the relative importance of coalbed reservoir parameters for prediction of methane inflow rates during mining of longwall development entries. Comput Geosci 34(9):1093–1114. doi: 10.1016/j.cageo.2007.04.008 CrossRefGoogle Scholar
  25. Keshavarz A, Badalyan A, Carageorgos T, Bedrikovetsky P, Johnson R (2015) Stimulation of coal seam permeability by micro-sized graded proppant placement using selective fluid properties. Fuel 144:228–236. doi: 10.1016/j.fuel.2014.12.054 CrossRefGoogle Scholar
  26. Liu YK (2012) Study on the depressurization effect produced by exploitation of lower distant protective coal seam and elimination of outburst hazard of the protected seams by applying gas drainage with surface boreholes. J China Coal Soc 37(6):1067–1068. doi: 10.13225/j.cnki.jccs.2012.06.012 Google Scholar
  27. Liu HB, Cheng YP (2015) The elimination of coal and gas outburst disasters by long distance lower protective seam mining combined with stress-relief gas extraction in the Huaibei coal mine area. J Nat Gas Sci Eng 27:346–353. doi: 10.1016/j.jngse.2015.08.068 CrossRefGoogle Scholar
  28. McKee CR, Bumb AC, Koenig RA (1988) Stress-dependent permeability and porosity of coal and other geologic formations. SPE formation evaluation 3(01): 81-91. doi: 10.2118/12858-PA
  29. Meng ZP, Zhang J, Shi XC, Tian YD, Li C (2016) Calculation model of rock mass permeability in coal mine goaf and its numerical simulation analysis. J China Coal Soc 41(8):1997–2005. doi: 10.13225/j.cnki.jccs.2016.0608 Google Scholar
  30. Noack K (1998) Control of gas emissions in underground coal mines. Int J Coal Geol 35:57–83. doi: 10.1016/S0166-5162(97)00008-6 CrossRefGoogle Scholar
  31. Palchik V (2003) Formation of fractured zones in overburden due to longwall mining. Environ Geol 44:28–38. doi: 10.1007/s00254-002-0732-7 Google Scholar
  32. Psaltis S, Farrell T, Burrage K, Burrage P, McCabe P, Moroney T, Mazumder S (2015) Mathematical modelling of gas production and compositional shift of a CSG (coal seam gas) field: local model development. Energy 88:621–635. doi: 10.1016/j.energy.2015.05.107 CrossRefGoogle Scholar
  33. Shahtalebi A, Khan C, Dmyterko A, Shukla P, Rudolph V (2016) Investigation of thermal stimulation of coal seam gas fields for accelerated gas recovery. Fuel 180:301–313. doi: 10.1016/j.fuel.2016.03.057 CrossRefGoogle Scholar
  34. State administration of work safety (2009) Provisions of the prevention of coal and gas. China coal industry publishing house, BeijingGoogle Scholar
  35. State safety production standard (2006) Code for coal mine gas drainage. China coal industry publishing house, BeijingGoogle Scholar
  36. Tang YB (2015) Sources of underground CO: crushing and ambient temperature oxidation of coal. J Loss Prev Process Ind 38:50–57. doi: 10.1016/j.jlp.2015.08.007 CrossRefGoogle Scholar
  37. Tu M, Miao XX, Huang NB (2006) Deformation rule of protected coal seam exploited by using the long-distance-lower protective seam method. J Min Saf Eng 23(3):253–257. doi: 10.3969/j.issn.1673-3363.2006.03.001 Google Scholar
  38. Wang HF, Cheng YP, Yuan L (2013) Gas outburst disasters and the mining technology of key protective seam in coal seam group in the Huainan coalfield. Nat Hazards 67(2):763–782. doi: 10.1007/s11069-013-0602-5 CrossRefGoogle Scholar
  39. Wang G, Li WX, Wang PF, Yang XX, Zhang ST (2017) Deformation and gas flow characteristics of coal-like materials under triaxial stress conditions. Int J Rock Mech Min Sci 91:72–80. doi: 10.1016/j.ijrmms.2016.11.015 Google Scholar
  40. Yang W, Lin BQ, Qu YA, Li ZW, Zhai C, Jia LL, Zhao WQ (2011) Stress evolution with time and space during mining of a coal seam. Int J Rock Mech Min Sci 48(7):1145–1152. doi: 10.1016/j.jngse.2015.08.068 CrossRefGoogle Scholar
  41. Yang W, Lin BQ, Yan Q, Zhai C (2014) Stress redistribution of longwall mining stope and gas control of multi-layer coal seams. Int J Rock Mech Min Sci 72:8–15. doi: 10.1016/j.ijrmms.2014.08.009 Google Scholar
  42. Yin GZ, Li XQ, Zhao HB, Li XS, Li GS (2010) In situ experimental study on the relation of drilling cuttings weight to ground pressure and gas pressure. J Univ Sci Technol Beijing 32(1):1–7. doi: 10.13374/j.issn1001-053x.2010.01.004 Google Scholar
  43. Yin W, Miao XX, Zhang JX, Zhong SJ (2017) Mechanical analysis of effective pressure relief protection range of upper protective seam mining. Int J Min Sci Technol 27(3):537–543. doi: 10.1016/j.ijmst.2017.03.021 CrossRefGoogle Scholar
  44. Yuan L, Xue S (2014) Defining outburst-free zones in protective mining with seam gas content-method and application. J China Coal Soc 39(9):1786–1791. doi: 10.13225/j.cnki.jccs.2014.8019 Google Scholar
  45. Zhou SN, Lin BQ (1999) Coal seam gas occurrence and flow theory. China coal industry publishing house, Beijing, pp 153–156Google Scholar

Copyright information

© Saudi Society for Geosciences 2017

Authors and Affiliations

  1. 1.College of Mining and Safety EngineeringShandong University of Science and TechnologyQingdaoPeople’s Republic of China
  2. 2.Mine Disaster Prevention and Control-Ministry of State Key Laboratory Breeding BaseShandong University of Science and TechnologyQingdaoPeople’s Republic of China
  3. 3.College of Mining and Safety EngineeringShandong University of Science and TechnologyQingdaoPeople’s Republic of China

Personalised recommendations