Numerical simulation research of coal and gas outburst near tectonic region in Ping ding shan mining area
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The complicated process of coal and gas outburst hinders the exploration of gas outburst mechanism. In order to better quantitatively evaluate gas outburst instability of reverse fault and normal fault combination using the RFPA2D numerical simulation software to study the coal face through fault from downthrown side to uplifted side and from uplifted side to downthrown side, the results showed that the outburst process can be divided into four stages, namely, stress concentration stage, coal-rock fracturing and splitting induced by the combinations of gas pressure and in situ stress, cracks propagation driven by gas pressure and the abrupt ejection of coal and gas; Wu 9-10-20090 belt transporter tunnel outburst occurs near the fault by the tensile failure, coal seam pressure shear failure occur, due to the fault sealing formation pressure gradient, under the influence of ground stress and gas pressure, fault and broken coal outburst risk; − 320 east outstanding is due to the fault sealing effect in coal roadway, gas pressure, coal shear failure occurs, breakage of coal is relatively serious, to highlight the accident when exposed fault; face from fault plate to increase plate driving is more likely to happen to highlight the phenomenon is determined by the conditions of gas release.
KeywordsSafety engineering Coal and gas outburst Numerical simulation Pingdingshan mining area
Financial support was provided by the Scientific and Technologial Innovation Programs of Higher Education Institutions in Shanxi (2019L0954) and Key Innovation Team for Fault Diagnosis and Health Management Technology of Coal Mine Machinery Equipment of 1331 Project in Shanxi Province (TD201812).
- Cheng YP, Zhang XL, Wang L (2013) Controlling effect of ground stress on gas pressure and outburst disaster. J Min Saf Eng 30:408–414Google Scholar
- Fan CH, Qin QQ (2016) Tectonic fractures in tight sandstone reservoirs of the upper cretaceous Qingshaokou formation in Yaoyingtai area of southern Songliao Basin, China. J Balkan Tribol Assoc 22:2640–2476Google Scholar
- Fan CH, Qin QQ, Wang XL (2018a) Comprehensive prediction of fractures distribution: a case study of Badaowan formation of Baka oilfield, turban-Hami Basin, Chinas. Indian J Geo Mar Sci 47:2042–2048Google Scholar
- Fan CH, He S, Zhang Y (2018b) Development phases and mechanism of tectonic fractures of shale-a case study of Longmaxi formation of Dingshan area in the southeast of Sichuan Basin, China. Acta Geol Sin (Engl Ed) 92:2351–2366Google Scholar
- Fan CH, Zhong C, Zhang Y, Qin QR, He S (2019) Geological factors controlling the accumulation and high yield of marine-facies shale gas: case study of the Wufeng-Longmaxi formation in the Dingshan area of Southeast Sichuan. China 93(3):536–560Google Scholar
- Han J, Zhang HW, Zhu ZM (2007) Controlling of tectonicstress field evolution for coal and gas outburst in Fuxin Basin. J China Coal Soc 32:934–938Google Scholar
- Li B, Wang K, Wei JP (2013) On the basic characteristic features and incidental regularity of coal and gas outbursts in China since from 2001 to 2012. J Saf Environ 13:274–278Google Scholar
- Li H, Tang HM, Qin QR, Zhou JL, Qin ZJ, Fan CH, Su PD, Wang Q, Zhong C (2019) Characteristics, formation periods and genetic mechanisms of tectonic fractures in the tight gas sandstones reservoir: a case study of Xujiahe formation in YB area, Sichuan Basin, China. J Petrol Sci Eng 178:723–735CrossRefGoogle Scholar
- Wang XL, Qin QQ, Xiong ZQ (2017) Applications of level grouting process in soft roadway to reinforce broken surrounding rock. Chin J Undergr Space Eng 13:206–212Google Scholar
- Yu BH, Wang DM (2013) Research on dilatation energy of released gas from coal seam. J Min Saf Eng 30:773–777Google Scholar
- Zhang JG (2013) Control effect of structure environment to coal and gas outburst in Pingdingshan mining area. J Min Saf Eng 30:432–436Google Scholar