Study on the Influence of High Lateral Pressure Coefficient near Horizontal Bedding Slip Structure on Outburst Prevention and Pressure Relief Angle
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摘要: 为确定近水平层滑构造高侧压系数对上保护层开采保护范围的影响，以韩城矿区下峪口煤矿为工程背景，分析了不同侧压系数对被保护层垂直应力演化、弹性能分布的影响，理论分析得出保护层开采后在煤层走向上产生高地应力梯度，进而减小防突卸压保护角；采用数值模拟方法得出保护层开采条件下煤层走向防突卸压角随侧压系数增大而减小，工作面倾斜上、下方的防突卸压角基本不受侧压系数影响的规律。该研究可为矿井被保护层工作面布置及瓦斯治理提供符合矿井实际的科学依据，并对相似矿井保护层开采范围的确定具有借鉴意义。Abstract: In order to determine the influence of high lateral pressure coefficient near horizontal bedding slip structure on the protection zone of the upper protective layer,taking Xiayukou Coal Mine in Hancheng mining area as engineering background,the influence of different lateral pressure coefficients on vertical stress evolution and elastic energy distribution of protected layer was studied.The theoretical analysis shows that high stress gradient is generated on the coal seam direction after the protective layer is mined,and then the protective angle of outburst prevention and pressure relief is reduced;the numerical simulation method is used to obtain that outburst prevention and pressure relief angle of coal seam strike decrease with the increase of lateral pressure coefficient,outburst prevention and pressure relief angle at the top and bottom of the inclined working face are not affected by the lateral pressure coefficient.The research provides the scientific basis for the arrangement of coal mine protected layer and gas control,and it can be used for reference to the determination of protective layer mining range of similar coal mine.
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[1] 国家安全生产监督管理总局,国家煤矿安全监察局.防治煤与瓦斯突出规定[S].北京:煤炭工业出版社,2009. [2] 国家安全生产监督管理总局,国家煤矿安全监察局.煤矿安全规程[S].北京:煤炭工业出版,2011. [3] 何国益.矿井瓦斯治理实用技术[M].北京:煤炭工业出版社,2009:138-146. [4] 李建铭.煤与瓦斯突出防治技术手册[M].徐州:中国矿业大学出版社,2006. [5] 胡千庭,文光才.煤与瓦斯突出的力学作用机理[M].北京:科学出版社,2013. [6] 孟贤正,汪长明,唐兵,等.具有突出和冲击地压双重危险煤层工作面的动力灾害预测理论与实践[J].矿业安全与环保,2007,34(3):1-4. [7] MENG Xianzheng,XIA Yongjun,TANG Bing,et al.Analysis of the dialectical relation between top coal caving and coal-gas outburs[J].Joural of Coal Science & Engineering(China),2009,15(2):181-187.
[8] 石必明.保护层开采覆岩变形移动特性及防突工程应用实践[M].北京:煤炭工业出版社,2008. [9] 乐粉华.天府三汇一矿倾斜煤层群上保护层保护范围的研究[D].重庆:重庆大学,2010. [10] 胡国忠,王宏图,范晓刚,等.急倾斜俯伪上保护层保护范围的三维数值模拟[J].岩石力学与工程学报,2009,28(S1):2845-2852. [11] 李篷,陈延可,王列平,等.上保护层开采卸压范围的相似模拟试验[J].煤矿安全,2012,43(12):32-36. [12] 胡千庭,孟贤正.关于远距离下保护层开采防止突出卸压角的研究[C]//中国煤炭学会煤矿安全专业委员会2004年学术年会论文集,2004:8. [13] 俞启香.矿井瓦斯防治[M].徐州:中国矿业大学出版社,1993. [14] 朱连山.关于煤层中的瓦斯膨胀能[J].煤矿安全,1985,16(2):47-50. -
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