梁北矿高瓦斯特软煤层巷道变形特征及原因
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摘要
梁北矿-550m水平二1煤层属典型"三软"煤层,煤层透气性差,瓦斯含量高、压力大,地应力大,具有较强的突出危险性。11采区煤巷埋深达610~750m,现场调查表明,巷道持续大变形,底鼓严重,支护难度大。本文对梁北矿-550m水平11采区二1煤层巷道工程地质特征进行了调研,总结了煤巷变形特征,运用FLAC数值模拟方法对巷道大变形的原因进行了分析。指出该煤巷变形以显著底鼓为特征,其主要原因是煤层软弱、底板煤扰动、瓦斯防突钻孔效应和支护缺陷。认为高瓦斯特软煤层巷道的支护应兼顾瓦斯治理与支护两方面,宜把它们当成一个系统进行协同分析,这是有效解决此类煤巷稳定性控制难题的一种有效途径。在此基础上,提出了相应的防治对策。
The B 1 coal seam at-550 m level in the Liangbei Coal Mine is a typical "three-soft"coal seam. There are relatively strong gas outbursts due to soft coal and poor air permeability,high gas content and high gas pressure in the coal. The coal roadway at the 11 mining area has a depth of 610 to 750 m. The in-situ investigation indicates that there are problems of large deformation,serious floor heave in the coal roadway. The engineering geological characteristics of the rock surrounding roadway in the B 1 coal seam at-550 m level is examined,and the deformation characteristics is summarized. The reason of large deformation is also analyzed by using the FLAC numerical test method. The results show that the coal roadway deformation is characterized by the serious floor heave,and the main reasons are weak floor coal,floor disturbance,effect of boreholes for gas outburst prevent and the support defects. Both the roadway support and gas treatment should be synergistically considered as the same system for the coal roadway within soft coal with high gas content. It is an effective way to control the larger deformation of the roadway. The corresponding control countermeasure is also put forward.
The B 1 coal seam at-550 m level in the Liangbei Coal Mine is a typical "three-soft"coal seam. There are relatively strong gas outbursts due to soft coal and poor air permeability,high gas content and high gas pressure in the coal. The coal roadway at the 11 mining area has a depth of 610 to 750 m. The in-situ investigation indicates that there are problems of large deformation,serious floor heave in the coal roadway. The engineering geological characteristics of the rock surrounding roadway in the B 1 coal seam at-550 m level is examined,and the deformation characteristics is summarized. The reason of large deformation is also analyzed by using the FLAC numerical test method. The results show that the coal roadway deformation is characterized by the serious floor heave,and the main reasons are weak floor coal,floor disturbance,effect of boreholes for gas outburst prevent and the support defects. Both the roadway support and gas treatment should be synergistically considered as the same system for the coal roadway within soft coal with high gas content. It is an effective way to control the larger deformation of the roadway. The corresponding control countermeasure is also put forward.
引文
[1]杨永康,季春旭,康天合,等.大厚度泥岩顶板煤巷破坏机制及控制对策研究[J].岩石力学与工程学报,2011,30(1):58-67.[YANG Y K,JI C X,KANG T H,et al.Damage mechanisms of mudstone roof with greatthick in coal roadway and its controlling countermeasures[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(1):58-67.(in Chinese)]
[2]方新秋,赵俊杰,洪木银.深井破碎围岩巷道变形机理及控制研究[J].采矿与安全工程学报,2012,29(1):1-7.[FANG X Q,ZHAO J J,HONG M Y.Failure mechanism and control measure of roadway deformation with fractured surrounding rock in deep mine[J].Journal of Mining&Safety Engineering,2012,29(1):1-7.(in Chinese)]
[3]刘泉声,时凯,黄兴.临近巷道掘进扰动效应下巷道变形监测分析[J].煤炭学报,2011,36(6):897-902.[LIU Q S,SHI K,HUANG X.Analysis on site monitoring of roadway under disturbed effects by excavation of neighboring roadways[J].Journal of China Coal Society,2011,36(6):897-902.(in Chinese)]
[4]张国锋,于世波,李国峰,等.巨厚煤层三软回采巷道恒阻让压互补支护研究[J].岩石力学与工程学报,2011,30(8):1619-1626.[ZHANG G F,YU S B,LI G F,et al.Research on Complementary Supporting System of Constant Resistance With Load Release for Three-Soft Mining Roadways in Extremely Thick Coal Seam[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(8):1619-1626.(in Chinese)]
[5]杨军,孙晓明,王树仁.济宁2#煤深部回采巷道变形破坏规律及对策研究[J].岩石力学与工程学报,2009,28(11):2280-2285.[YANG J,SUN X M,WANG S R.Study of Deformation And Failure Laws of Deep Roadway And Countermeasures in Jining Coal Mine No.2[J].Chinese Journal of Rock Mechanics and Engineering,2009,38(11):2280-2285.(in Chinese)]
[6]何满潮,齐干,程骋,等.深部复合顶板煤巷变形破坏机制及耦合支护设计[J].岩石力学与工程学报,2007,26(5):987-993.[HE M C,QI G,CHENG C,et al.Deformation and damage mechanisms and coupling support design in deep coal roadway with compound roof[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(5):987-993.(in Chinese)]
[7]王巨光,赵忠理,陆明心,等.三软煤层巷道持续变形控制技术[J].煤炭工程,2011,(5):23-24.[WANG J G,ZHAO Z L,LU M X,et al.Control technique for the continuous deformation of the roadway within the three-soft-coal seam[J].Coal Engineering,2011,(5):23-24.(in Chinese)]
[8]贠三强,杨现国,张清廷,等.梁北煤矿矿井地质报告[R].许昌:河南省许昌新龙矿业有限责任公司,2006.[YUAN S Q,YANG X G,ZHANG Q T,et al.Mine geology report for Liangbei Coal Mine[R].Xuchang:Henan Xuchang Xinrong Mining Limited Company,2006.(in Chinese)]
[9]张延新,蔡美峰,王克忠.平顶山一矿地应力分布特征研究[J].岩石力学与工程学报,2004,23(23):4033-4037.[ZHANG Y X,CAI M F,WANG K Z.Study on distribution characteristics of in-situ stresses for Pingdingshan No.1 Mine[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(23):4033-4037.(in Chinese)]
[10]刘海波,刘玉丽,任奋华,等.平顶山八矿地应力分布规律[J].西安科技大学学报,2009,29(2):144-148.[LIU H B,LIU Y L,REN F H,et al.Distribution regularities of in-situ stresses for eighth mine of Pingdingshan coal mining cooperation[J].Journal of Xi’an University of Science and Technology,2009,29(2):144-148.(in Chinese)]
[2]方新秋,赵俊杰,洪木银.深井破碎围岩巷道变形机理及控制研究[J].采矿与安全工程学报,2012,29(1):1-7.[FANG X Q,ZHAO J J,HONG M Y.Failure mechanism and control measure of roadway deformation with fractured surrounding rock in deep mine[J].Journal of Mining&Safety Engineering,2012,29(1):1-7.(in Chinese)]
[3]刘泉声,时凯,黄兴.临近巷道掘进扰动效应下巷道变形监测分析[J].煤炭学报,2011,36(6):897-902.[LIU Q S,SHI K,HUANG X.Analysis on site monitoring of roadway under disturbed effects by excavation of neighboring roadways[J].Journal of China Coal Society,2011,36(6):897-902.(in Chinese)]
[4]张国锋,于世波,李国峰,等.巨厚煤层三软回采巷道恒阻让压互补支护研究[J].岩石力学与工程学报,2011,30(8):1619-1626.[ZHANG G F,YU S B,LI G F,et al.Research on Complementary Supporting System of Constant Resistance With Load Release for Three-Soft Mining Roadways in Extremely Thick Coal Seam[J].Chinese Journal of Rock Mechanics and Engineering,2011,30(8):1619-1626.(in Chinese)]
[5]杨军,孙晓明,王树仁.济宁2#煤深部回采巷道变形破坏规律及对策研究[J].岩石力学与工程学报,2009,28(11):2280-2285.[YANG J,SUN X M,WANG S R.Study of Deformation And Failure Laws of Deep Roadway And Countermeasures in Jining Coal Mine No.2[J].Chinese Journal of Rock Mechanics and Engineering,2009,38(11):2280-2285.(in Chinese)]
[6]何满潮,齐干,程骋,等.深部复合顶板煤巷变形破坏机制及耦合支护设计[J].岩石力学与工程学报,2007,26(5):987-993.[HE M C,QI G,CHENG C,et al.Deformation and damage mechanisms and coupling support design in deep coal roadway with compound roof[J].Chinese Journal of Rock Mechanics and Engineering,2007,26(5):987-993.(in Chinese)]
[7]王巨光,赵忠理,陆明心,等.三软煤层巷道持续变形控制技术[J].煤炭工程,2011,(5):23-24.[WANG J G,ZHAO Z L,LU M X,et al.Control technique for the continuous deformation of the roadway within the three-soft-coal seam[J].Coal Engineering,2011,(5):23-24.(in Chinese)]
[8]贠三强,杨现国,张清廷,等.梁北煤矿矿井地质报告[R].许昌:河南省许昌新龙矿业有限责任公司,2006.[YUAN S Q,YANG X G,ZHANG Q T,et al.Mine geology report for Liangbei Coal Mine[R].Xuchang:Henan Xuchang Xinrong Mining Limited Company,2006.(in Chinese)]
[9]张延新,蔡美峰,王克忠.平顶山一矿地应力分布特征研究[J].岩石力学与工程学报,2004,23(23):4033-4037.[ZHANG Y X,CAI M F,WANG K Z.Study on distribution characteristics of in-situ stresses for Pingdingshan No.1 Mine[J].Chinese Journal of Rock Mechanics and Engineering,2004,23(23):4033-4037.(in Chinese)]
[10]刘海波,刘玉丽,任奋华,等.平顶山八矿地应力分布规律[J].西安科技大学学报,2009,29(2):144-148.[LIU H B,LIU Y L,REN F H,et al.Distribution regularities of in-situ stresses for eighth mine of Pingdingshan coal mining cooperation[J].Journal of Xi’an University of Science and Technology,2009,29(2):144-148.(in Chinese)]