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Variation characteristics of coal rock layer and gas extraction law of surface well under mining pressure relief

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Abstract

In order to study the variation characteristics of coal rock layers and gas extraction law of surface well under mining pressure relief, in Taoyuan Coal Mine of Huaibei mining area, this paper carried out the researches of bottom hole flow pressure and extraction parameter monitoring of surface extraction wells and FLAC3D stress numerical simulation under mining pressure relief and obtained variation data of the bottom hole flow pressure, the extraction volume, and the in situ stress in mining progress. Based on on-site monitoring and numerical simulation results, the changes of coal rock layers in mining affected areas are divided into seven stages. The four stages in front of the mining position are the pressure relief stage (mining position to 15 m in front), the stress concentration stage (15 ~ 40 m in front), the pressure relief stage (40 ~ 65 m in front), and the stage near the original condition (> 65 m in front). The three stages behind mining position are the pressure relief stage (mining position ~ − 40 m), stress recovery stage (− 40 ~ − 250 m), and post-compaction stability stage (> − 250 m). It is found that the gas extraction curve of surface well in mining pressure relief has a positive skew distribution. The extraction stage can be divided into three stages: initial gas production, high production, and gas production attenuation. It is believed that the methane in gas mainly comes from the upper coal seam in initial stage and the main mining seam in the late mining period. According to researches, it is recommended that the “one well multi-purpose” surface gas extraction method can be actively explored in mining affected areas.

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References

  • Abbas M (2012) Prediction of the height of destressed zone above the mined panel roof in longwall coal mining. Int J Coal Geol 98:62–72

    Article  Google Scholar 

  • Aguado MBD, Nicieza CG (2007) Control and prevention of gas outbursts in coal mines, Riosa-Olloniego coalfield, Spain. Int J Coal Geol 69(4):253–266

    Article  Google Scholar 

  • Alireza J, Tayfun B (2013) Relationship between percolation-fractal properties and permeability of 2D fracture networks. International Journal of Rock Mechanics & Mining Sciences 1(7):353–362

    Google Scholar 

  • Chen JH, Hu QT (2009) Analysis on mining released gas sources for surface borehole drilling and gas drainage. Coal Science and Technology 37(12):38–42

    Google Scholar 

  • Cheng WM, Sun LL, Wang G, Huang XC, Huang QM (2016) Similar material simulation test of steep-inclined extra-thick coal seam. Journal of Mining& Safety Engineering 33(3):387–392

    Google Scholar 

  • Das SK (2000) Observations and classification of roof strata behavior over longwall coal mining panels in India. Int J Rock Mech Min Sci 37:585–597

    Article  Google Scholar 

  • Dong GF, Hu QT, Wang Z, Shi BM (2012) Study on distribution of gas flow fields in working face under the condition of mining. Journal of Mining& Safety Engineering 29(4):581–585

    Google Scholar 

  • Hoek E, Diederichs MS (2006) Empirical estimation of rock mass modulus. International Journal of Rock Mechanics & Mining Sciences 43(2):203–215

    Article  Google Scholar 

  • Hu QT, Liang YP, Liu JZ (2007) CFD simulation of goaf gas flow patterns. J China Coal Soc 32(7):719–723

    Google Scholar 

  • Jiang WP, Zhang Q, Zeng FG (2019) Dependence of metamorphic degree of coal on content and genesis of coal-bed methane in China. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 41(3):378–388

    Google Scholar 

  • Karacan CO (2007) Development and application of reservoir models and artificial neural networks for optimizing ventilation air requirements in development mining of coal seams. Int J Coal Geol 72:221–229

    Article  Google Scholar 

  • Karacan CO (2009) Reconciling longwall gob gas reservoirs and venthole production performances using multiple rate drawdown well test analysis. Int J Coal Geol 80(3–4):181–195

    Article  Google Scholar 

  • Karacan CO, Goodman G (2009) Hydraulic conductivity changes and influencing factors in longwall overburden determined by slug tests in gob gas ventholes. Int J Rock Mech Min Sci 46:1162–1174

    Article  Google Scholar 

  • Lee S, Park I (2013) Application of decision tree mode for the ground subsidence hazard mapping near abandoned underground coal mines. J Environ Manag 127(2):166–176

    Article  Google Scholar 

  • Li, R.F..2014.Study on the reservoir and resource evaluation technique of CBM in the stabilization region after mining. Chongqing:Chongqing University Press 46–68

  • Li SG, Qian MG, Shi PW (2000) Methane migration and accumulation state after seam mining. Coal geology & exploration 28(5):31–33

    Google Scholar 

  • Li HY, Wang WH, Qi QX, Zhang L (2014) Study on fissure development rule of overlying strata influenced by mining based on fractal theory. J China Coal Soc 39(6):1023–1030

  • Li SG, Lin HF, Zhao PX, Xiao P, Pan HY (2014) Dynamic evolution of mining fissure elliptic paraboloid zone and extraction coal and gas. J China Coal Soc 39(8):1455–1462

  • Li DP, Zhou HW, Xue DJ, Yi HY, Hao HL (2015) Relationship between percolation and fractal properties of mining-induced crack network in coal and rock masses. Rock Soil Mech 36(4):1135–1140

    Google Scholar 

  • Li SG, Ding Y, An CF, Li HT, Wei XW (2016) Experimental research on the shape and dynamic evolution of repeated mining-induced fractures in short-distance coal seams. Journal of Mining& Safety Engineering 33(5):904–910

    Google Scholar 

  • Liang YP (2007) Practice of methane drainage by surface well drilling in Huainan mining area. Journal of Mining& Safety Engineering 4:409–413

    Google Scholar 

  • Luo F, Cao SG, Li Y (2018) Evolution of mine-induced stress concentration shell and stress relief body and its gas migration. Journal of Mining& Safety Engineering 35(01):155–162

    Google Scholar 

  • Meng P, Ye JY (2012) Fracture development of overlying strata and optimization of high position boring:with working face 34low 2 in Qinan mine as example. Coal geology & exploration 40(2):19–22

    Google Scholar 

  • Palchik V (2002) Influence of physical characteristics of weak rock mass on height of caved zone over abandoned subsurface coal mines. Environ Geol 42(1):92–101

    Article  Google Scholar 

  • Palchik V (2003) Formation of fractured zones in overbur-den due to long wall mining. Environ Geol 44(1):28–38

    Article  Google Scholar 

  • Palchik V (2015) Bulking factors and extents of caved zones in weathered overburden of shallow abandoned underground workings. Int J Rock Mech Min Sci 79:227–240

    Article  Google Scholar 

  • Sheorey PR, Loui JP, Singh KB, Singh SK (2003) Ground subsidence observations and a modified influence function method for complete subsidence prediction. International Journal of Rock Mechanics & Mining Sciences 37(5):801–818

    Article  Google Scholar 

  • Sisavath S, Mourzenko V, Genthon P, Thovert JF, Adler PM (2004) Geometry, percolation and transport properties of fracture networks derived from line data. Geophys J Int 157(2):917–934

    Article  Google Scholar 

  • Suchowerska AM, Merifield RS, Carter JP (2013) Vertical stress changes in multi-seam mining under supercritical longwall panels. Int J Rock Mech Min Sci 61:306–320

    Article  Google Scholar 

  • Suchowerska AM, Carter JP, Merifield RS (2014) Horizontal stress under supercritical longwall panels. Int J Rock Mech Min Sci 70:240–251

    Article  Google Scholar 

  • Sun S, Tian SX, Xia SB, Zhang AF, Hu QT, Liu L (1999) Comprehensive gas control technology of high gas and high production blasting mining face in Xinzhuangzi mine. Mining Safety & Environmental Protection 6:42–44

    Google Scholar 

  • Tayfun B (2001) Fractal analysis of 2D fracture networks of geothermal reservoirs in South-Western Turkey. J Volcanol Geotherm Res 11(2):83–103

    Google Scholar 

  • Wang CG (2013) Determination of overlying strata caving zone and fractured zone height. Opencast Mining Technology 3:30–32

    Google Scholar 

  • Wang ZG, Zhou HW, Xie HP (2009) Research on fractal characterization of mined crack network evolution in overburden rock stratum under deep mining. Rock Soil Mech 30(8):2403–2408

    Google Scholar 

  • Wei MM, Ju YW, Hou GL, Wang GC, Yu LY, Zhang WJ, Li XS (2017) A new parameter as an indicator of the degree of deformation of coals. J Earth Sci 28(2):358–366

    Article  Google Scholar 

  • Wei YC, Xiang XX, Wang AM, Zhang Q, Cao DY (2019) Influence of water with different salinity on the adsorption performance of coal reservoir. J China Coal Soc 44(9):2833–2839

    Google Scholar 

  • Wu YZ (2014) Gas migration law and stereo gas drainage technology of coal seam with soft and low permeability under the effect of mining. China University of Mining & Technology Press, Beijing, pp 35–56

    Google Scholar 

  • Xie HP, Zhou HW, Xue DJ, Gao F (2014) Theory, technology and engineering of simultaneous exploitation of coal and gas in China. J China Coal Soc 39(8):1391–1397

    Google Scholar 

  • Xu JL, Qian MG (2000) Evolution of mine-induced stress concentration shell and stress relief body and its gas migration. Journal of China University of Mining & Technology 1:78–81

    Google Scholar 

  • Xu G, Wang YL, Zhang TJ, Pan XH (2020) Fracture distribution characteristics of mining-induced overburden in thick coal seam and pressure relief gas extraction technology. Safety in Coal Mines 51(2):150–155

    Google Scholar 

  • Yasitli NE, Unver B (2005) 3D numerical modeling of longwall mining with top-coal caving. Int J Rock Mech Min Sci 42(2):219–235

    Article  Google Scholar 

  • Yavuz H (2004) An estimation method for cover pressure re-establishment distance and pressure distribution in the goaf of longwall coal mines. Int J Rock Mech Min Sci 41(2):193–205

    Article  Google Scholar 

  • Yin GZ, Li X, Han PB, Li MH, Li WP, Deng BZ (2016) Experimental study on overburden strata fracture evolution law in three dimensional mine-induced stress conditions. J China Coal Soc 41(2):406–413

    Google Scholar 

  • Yuan L (2009) Theory of pressure-relieved gas extraction and technique system of integrated coal production and gas extraction. J China Coal Soc 34(1):5–12

    Google Scholar 

  • Yuan L (2016) Strategic thinking of simultaneous exploitation of coal and gas in deep mining. J China Coal Soc 41(1):1–6

    Google Scholar 

  • Yuan L, Guo H, Li P, Liang YP, Liao BC (2013) Theory and technology of goaf gas drainage with large-diameter surface boreholes. J China Coal Soc 38(1):1–8

    Google Scholar 

  • Zhang, Y.J. 2014. Study on strata control fundamental theory of mining mid full residual coal above longwall caving goaf. Taiyuan :Taiyuan University of Technology Press 36–58

  • Zhang Y, Zhang B, Zhang CL, Zhao JJ, Liu JK, Zhang SQ (2013) Study of the dynamic evolution rules and distribution on pattern of mining-induced fractures of thick coal seam. Journal of China University of Mining & Technology 42(6):935–940

    Google Scholar 

Download references

Funding

This work was conducted under the financial support of the National Natural Science Foundation of China (Grant No. 41972167).

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Authors and Affiliations

  1. Xi’an Research Institute of China Coal Technology & Engineering Group Corp, Xi’an, 710054, People’s Republic of China

    Wenping Jiang, Long Zhao & Bin Cheng

Authors
  1. Wenping Jiang
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  2. Long Zhao
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  3. Bin Cheng
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Corresponding author

Correspondence to Wenping Jiang.

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The author(s) declare that they have no competing interests.

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Responsible Editor: Murat Karakus

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Jiang, W., Zhao, L. & Cheng, B. Variation characteristics of coal rock layer and gas extraction law of surface well under mining pressure relief. Arab J Geosci 14, 298 (2021). https://doi.org/10.1007/s12517-021-06694-3

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  • DOI: https://doi.org/10.1007/s12517-021-06694-3

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