Advertisement

Simulation research on the mechanism of water inrush from fractured floor under the dynamic load induced by roof caving: taking the Xinji Second Coal Mine as an example

  • Hailong LiEmail author
  • Haibo Bai
Original Paper
  • 39 Downloads

Abstract

The deformation and failure modes of the fractured floor are very complicated, under the coupled action of the dynamic and static stress superposition disturbance as well as the seepage field induced by high strength deep mining. Currently, there are not enough researches on the mechanism of water inrushes from the fractured floor under the action of dynamic and static stress superposition disturbance in deep parts. In this paper, the background was the geological conditions of Xinji Second Coal Mine No.1 coal seam, which is located in Huainan of Anhui Province in China. This paper was based on the results of the 3D seismic exploration for small faults in the field floor, and the roof carving over great extent was taken as the typical dynamic disturbance inducement. The FLAC program was applied in this paper, and the non-linear dynamic module and the seepage module of the software were coupled to simulate the activation and re-development process of the floor fracture under the dynamic load caused by roof caving. The evolution law of the water inrush from floor fractures under the action of dynamic and static stress superposition disturbance was studied. From the aspects of the stress, plastic failure zones, pore water pressure lifting height, the fracture seepage velocity, the dynamic load strength, and the confined water pressure of the fractured floor model, this paper analyzed the activation and re-development process of the floor fracture under the dynamic load caused by roof caving and the formation mechanism of the water-flowing channel. The results revealed the mechanism of the secondary failure of the floor fracture caused by roof caving, and provided the theoretical basis and calculation methods for predicting the water inrush from floor fractures in high strength deep mining.

Keywords

Mining dynamic load Floor fractures Water inrush Deep FLAC 

Notes

Funding information

This work received financial support from the National Basic Research Program of China (2013CB227900), National Natural Science Foundation of China (51404266), and Scientific Research Doctoral Foundation of Shandong Jianzhu University (XNBS1856).

References

  1. Bai HB, Miao XX (2009) Research progress and major problems of water preserved coal mining. J Min Saf Eng 26(3):253–260.aGoogle Scholar
  2. Bai HB, Miao XX (2016) Hydrogeological characteristics and mine water inrush prevention of late Paleozoic coalfields. J China Univ Min Technol 45(1):1–10Google Scholar
  3. Bai HB, Ma D, Chen ZQ (2013) Mechanical behavior of groundwater seepage in karst collapse pillars. Eng Geol 164:101–106CrossRefGoogle Scholar
  4. Chen LW, Zhang SL, Gui HR (2014) Prevention of water and quicksand inrush during extracting contiguous coal seams under the lowermost aquifer in the unconsolidated Cenozoic alluvium-a case study. Arab J Geosci 7(6):2139–2149CrossRefGoogle Scholar
  5. Chen B, Li JS, Chen GQ, Wei WD, Yang Q, Yao MT, Shao JA, Zhou M, Xia XH, Dong KQ, Xia HH, Chen HP (2017) China’s energy-related mercury emissions: characteristics, impact of trade and mitigation policies. J Clean Prod 141:1259–1266CrossRefGoogle Scholar
  6. Cheng JL, Sun XY, Zheng G et al (2013) Numerical simulations of water-inrush induced by fault activation during deep coal mining based on fluid-solid coupling interaction. Disa Adv 6(11):10–14Google Scholar
  7. Drover C, Villaescusa E, Onederra I (2018) Face destressing blast design for hard rock tunnelling at great depth. Tunn Undergr Sp Technol 80:257–268CrossRefGoogle Scholar
  8. Dai SF, Ren DY, Chou CL, Finkelman RB, Seredin VV, Zhou Y (2012) Geochemistry of trace elements in Chinese coals: a review of abundances, genetic types, impacts on human health, and industrial utilization. Int J Coal Geol 94:3–21CrossRefGoogle Scholar
  9. Fairhurst C (2017) Some challenges of deep mining. Engineering 3(4):527–537CrossRefGoogle Scholar
  10. Green F, Stern N (2017) China’s changing economy: implications for its carbon dioxide emissions. Clim Policy 17(4):423–442CrossRefGoogle Scholar
  11. Gui H, Lin M (2016) Types of water hazards in China coalmines and regional characteristics. Natl Hazards 84(2):1–12CrossRefGoogle Scholar
  12. Gui H, Xu JP (2017) A numerical simulation of impact of groundwater seepage on temperature distribution in karst collapse pillar. Arab J Geosci 10(1):10.  https://doi.org/10.1007/s12517-016-2806-y CrossRefGoogle Scholar
  13. Gui HR, Song XM, Lin ML (2017) Water-inrush mechanism research mining above karst confined aquifer and applications in North China coalmines. Arab J Geosci 10(7):180.  https://doi.org/10.1007/s12517-017-2965-5 CrossRefGoogle Scholar
  14. Guo WJ, Zhao JH, Yin LM et al (2017) Simulating research on pressure distribution of floor pore water based on fluid-solid coupling. Arab J Geosci 10(1):5.  https://doi.org/10.1007/s12517-016-2770-6 CrossRefGoogle Scholar
  15. Hao L, Bai HB, Wu JJ et al (2017) Mechanism of water inrush driven by grouting and control measures-a case study of Chensilou mine, China. Arab J Geosci 10(21):468.  https://doi.org/10.1007/s12517-017-3258-8 CrossRefGoogle Scholar
  16. He MC (2014) Progress and challenges of soft rock engineering in depth. J China Coal Soc 39(8):1409–417Google Scholar
  17. He MC, Xie HP, Peng SP et al (2005) Study on rock mechanics in deep mining engineering. Chin J Rock Mech Eng 24(16):2803–2813Google Scholar
  18. He MC, Wang Y, Su JS et al (2018) Analysis of fractal characteristics of fragment of sandstone impact rock burst under static and dynamic coupled loads. J China Univ Min Technol 47(4):699–705Google Scholar
  19. Hou XG, Shi WH, Yang TH (2018) A non-linear flow model for the flow behavior of water inrush induced by the karst collapse column. RSC Adv 8(3):1656–1665CrossRefGoogle Scholar
  20. Huang J, Tian CY, Xing LF, Bian Z, Miao X (2017) Green and sustainable mining: underground mine fully mechanized solid dense stowing-mining method. Sustainability 9(8).  https://doi.org/10.3390/su9081418 CrossRefGoogle Scholar
  21. Jiang YD, Pan YS, Jiang FX et al (2014) State of the art review on mechanism and prevention of coal bumps in China. J China Coal Soc 39(2):205–213Google Scholar
  22. Li HL (2016) Study on coal seam floor failure rule under mining dynamic loading effect and control technique of water-inrush. China University of Mining and Technology, XuzhouGoogle Scholar
  23. Li LC, Tang CA, Li G et al (2009) Damage evolution and delayed groundwater inrush from micro faults in coal seam floor. Mine Water Environ 31(12):1838–1844Google Scholar
  24. Li LP, Lu W, Li SC et al (2010) Research status and developing trend analysis of the water inrush mechanism for underground engineering construction. J Shandong Univ (Eng Sci) 40(3):107–112,118Google Scholar
  25. Li LC, Yang TH, Liang ZZ et al (2011) Numerical investigation of groundwater outbursts near faults in underground coal mines. Int J Coal Geol 85(3):276–288Google Scholar
  26. Li LP, Li SC, Shi SS et al (2012) Multi-field coupling mechanism of seepage damage for the water inrush channel formation process of coal mine. J Min Saf Eng 29(2):232–238Google Scholar
  27. Li HL, Bai HB, Ma D et al (2016) Experimental study on mining-induced failure depth lagging coal wall secondary deepening rule. J Min Saf Eng 33(2):318–323Google Scholar
  28. Li HL, Bai HB, Ma D et al (2018a) Physical simulation testing research on mining dynamic loading effect and induced coal seam floor failure. J Min Saf Eng 35(2):366–372Google Scholar
  29. Li A, Liu Y, Mou L et al (2018b) Numerical analysis and case study on the mitigation of mining damage to the floor of no. 5 coal seam of Taiyuan Group by grouting. J South Afr Inst Min Metall 118(5):461–470Google Scholar
  30. Liu B, Lu CP, Dou LM et al (2011) Simulation study on shock wave propagation character in coal and rock. J China Coal Soc 36(S2):247–253Google Scholar
  31. Lu YL, Wang LG (2015) Numerical simulation of mining-induced fracture evolution and water flow in coal seam floor above a confined aquifer. Comput Geotech 67:157–171CrossRefGoogle Scholar
  32. Ma D, Bai HB, Wang YM (2015) Mechanical behavior of a coal seam penetrated by a karst collapse pillar: mining-induced groundwater inrush risk. Nat Hazards 75(3):2137–2151CrossRefGoogle Scholar
  33. Ma D, Miao XX, Bai HB (2016) Effect of mining on shear sidewall groundwater inrush hazard caused by seepage instability of the penetrated karst collapse pillar. Nat Hazards 82(1):73–93CrossRefGoogle Scholar
  34. Miao XX, Qian MG (2009) Research on green mining of coal resources in China: current status and future prospects. J Min Saf Eng 26(1):1–14Google Scholar
  35. National Development and Reform Commission, National Energy Administration (2016) The 13th five-year plan for energy development. http://www.ndrc.gov.cn/zcfb/zcfbtz/201701/W020170117335278192779.pdf.
  36. Qian MG, Miao XX, Xu JL et al (2008) On scientized mining. J Min Saf Eng 25(1):1–10Google Scholar
  37. Qian ZW, Huang Z, Song JG (2018) A case study of water inrush incident through fault zone in China and the corresponding treatment measures. Arab J Geosci 11(14):381.  https://doi.org/10.1007/s12517-018-3727-8 CrossRefGoogle Scholar
  38. Ranjith PG, Zhao JA, Ju MH, de Silva RVS, Rathnaweera TD, Bandara AKMS (2017) Opportunities and challenges in deep mining: a brief review. Engineering 3(4):546–551CrossRefGoogle Scholar
  39. Shi WH, Yang TH, Yu QL, Li Y, Liu H, Zhao Y (2017) A study of water-inrush mechanisms based on geo-mechanical analysis and an in-situ groundwater investigation in the Zhongguan iron mine, China. Mine Water Environ 36(3):409–417CrossRefGoogle Scholar
  40. Shi WH, Yang TH, Liu HL et al (2018) Numerical modeling of non-Darcy flow behavior of groundwater outburst through fault using the Forchheimer equation. J Hydrol Eng 23(2):04017062.  https://doi.org/10.1061/(ASCE)HE.1943-5584.0001617 CrossRefGoogle Scholar
  41. Sun W, Zhou W, Jiao J (2016) Hydrogeological classification and water inrush accidents in China’s coal mines. Mine Water Environ 35(2):214–220CrossRefGoogle Scholar
  42. Sun J, Wang LG, Zhao GM (2018) Failure characteristics and confined permeability of an inclined coal seam floor in fluid-solid coupling. Adv Civ Eng 2356390.  https://doi.org/10.1155/2018/2356390 Google Scholar
  43. Wang LG, Han M, Wang ZS et al (2013) Stress distribution and damage law of mining floor. J Min Saf Eng 30(3):317–322Google Scholar
  44. Wen YY, Mu ZL, Yi EB et al (2013) The response features of roadway surrounding rock in different hardness coal seams under dynamic disturbance. J Mi Saf Eng 30(4):555–559Google Scholar
  45. Wu Q, Zhu B, Li JM et al (2008) Numerical simulation of lagging water-inrush mechanism of rock roadways near fault zone. J China Univ Min Technol 37(6):780–785Google Scholar
  46. Wu Q, Zhu B, Liu SQ (2011) Flow-solid coupling simulation method analysis and time identification of lagging water-inrush near mine fault belt. Chin J Rock Mech Eng 30(1):93–104Google Scholar
  47. Wu Q, Liu YZ, Liu DH et al (2016) Prediction of floor water inrush: the application of GIS-Based AHP vulnerable index method to Donghuantuo coal mine, China. Nat Hazards 82(1):73–93CrossRefGoogle Scholar
  48. Wu Q, Zhao DK, Wang Y et al (2017) Method for assessing coal-floor water-inrush risk based on the variable-weight model and unascertained measure theory. Hydrogeol J 25(7):2089–2103CrossRefGoogle Scholar
  49. Xie HP (2017) Research framework and anticipated results of deep rock mechanics and mining theory. Adv Eng Sci 49(2):1–16Google Scholar
  50. Xie JL, Xu JL, Wang F (2018) Mining-induced stress distribution of the working face in a kilometer-deep coal mine-a case study in Tangshan coal mine-a case study in Tangshan coal mine. J Geophys Eng 15(5):2060–2070CrossRefGoogle Scholar
  51. Xu YC, Chen XM, Li JB et al (2013) Experimental research on floor heave and water inrush in the broken rock roadway under great depth and high water pressure. J China Coal Soc 38(S1):124–128Google Scholar
  52. Xu YC, Luo YQ, Li JH, Li K, Cao X (2018) Water and sand inrush during mining under thick unconsolidated layers and thin bedrock in the Zhaogu No. 1 coal mine, China. Mine Water Environ 37(2):336–345CrossRefGoogle Scholar
  53. Yu SW, Wei YM, Guo HX, Ding L (2014) Carbon emission coefficient measurement of the coal-to-power energy chain in China. Appl Energy 114:290–300CrossRefGoogle Scholar
  54. Yuan L (2015) Theory and practice of integrated coal production and gas extraction. Int Coal Sci Technol 2(1):3–11CrossRefGoogle Scholar
  55. Yuan L (2016) Strategic thinking of simultaneous exploi-tation of coal and gas in deep mining. J China Coal Soc 41(1):1–6Google Scholar
  56. Zhang JC (2005) Investigations of water inrushes from aquifers under coal seams. Int J Rock Mech Min Sci 42:350–360CrossRefGoogle Scholar
  57. Zhang JC, Liu TQ (1990) Discussion on depth and distribution characteristics of coal seam floor fracture zone. Coal Sci Technol 15(2):46–54Google Scholar
  58. Zhang JC, Shen BH (2004) Coal mining under aquifers in China: a case study. Int J Rock Mech Min Sci 41:629–639CrossRefGoogle Scholar
  59. Zhang SC, Guo WJ, Li Y (2017) Experimental simulation of water-inrush disaster from the floor of mine and its mechanism investigation. Arab J Geosci 10(22):503.  https://doi.org/10.1007/s12517-017-3287-3 CrossRefGoogle Scholar
  60. Zhang MW, Liu SD, Shimada H (2018) Regional hazard prediction of rock bursts using microseismic energy attenuation tomography in deep mining. Nat Hazards 93(3):1359–1378CrossRefGoogle Scholar
  61. Zhou FB, Xia TQ, Wang XX, Zhang Y, Sun Y, Liu J (2016) Recent developments in coal mine methane extraction and utilization in China: a review. J Nat Gas Sci Eng 31:437–458CrossRefGoogle Scholar

Copyright information

© Saudi Society for Geosciences 2019

Authors and Affiliations

  1. 1.School of ScienceShandong Jianzhu UniversityJinanChina
  2. 2.State Key Laboratory for Geomechanics and Deep Underground EngineeringChina University of Mining & TechnologyXuzhouChina

Personalised recommendations