断层倾角对大采高综采面围岩应力的影响
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摘要
针对断层影响工作面回采的安全性,以西山煤电东曲矿大采高工作面为背景,通过相似模拟实验,设计了无断层、F_1～F_6七种不同倾角断层条件下,模拟大采高工作面回采时支架压力、围岩运移及顶板应力的分布变化情况,研究不同倾角断层对大采高工作面的影响。结果表明:由上盘向断层掘进时,工作面支架压力、顶板的应力和位移均随断层倾角的增大而增大;由下盘向断层掘进时,工作面压力、顶板应力和位移随着断层倾角的增加,先变大后减小,在断层倾角为85°时达到峰值。该研究对提高煤矿工作面开采过断层的安全提供了理论指导。
This paper is a response to faults affecting the safety of the mining face. The study building on the case of the large mining height working face of Dongqu Mine of Xishan Coal Electricity Group Co. Ltd. involves designing seven different dip angles of No fault,F1-F6 using similar simulation experiments; simulating the way the distribution varies in support pressure,surrounding rock migration,and roof stress,as occurs in the mining of large mining height face; and thereby identifying the effect of different dip faults on the mining face with a large mining height. The results reveal that an increase grows in the pressure of the support surface and the stress and displacement of the roof,depending on the increasing dip angle of the fault as driving proceeds from the upper plate to the fault; and an initial increase and subsequent decrease occurs in the working face pressure,roof stress,and displacement depending on the increasing dip angle of the faults as drilling goes from the lower plate to the fault,and a peak occurs given the dip angle of 85°. This research could inform an improvement in the safety of mining faults in coal mining face.
This paper is a response to faults affecting the safety of the mining face. The study building on the case of the large mining height working face of Dongqu Mine of Xishan Coal Electricity Group Co. Ltd. involves designing seven different dip angles of No fault,F1-F6 using similar simulation experiments; simulating the way the distribution varies in support pressure,surrounding rock migration,and roof stress,as occurs in the mining of large mining height face; and thereby identifying the effect of different dip faults on the mining face with a large mining height. The results reveal that an increase grows in the pressure of the support surface and the stress and displacement of the roof,depending on the increasing dip angle of the fault as driving proceeds from the upper plate to the fault; and an initial increase and subsequent decrease occurs in the working face pressure,roof stress,and displacement depending on the increasing dip angle of the faults as drilling goes from the lower plate to the fault,and a peak occurs given the dip angle of 85°. This research could inform an improvement in the safety of mining faults in coal mining face.
引文
[1]陈敏,张庆华,王麒翔.断层对煤与瓦斯突出范围的影响[J].煤炭科学技术,2014(3):39-41.
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[4]李志华,窦林名,牟宗龙,等.断层对顶板型冲击矿压的影响[J].采矿与安全工程学报,2008,25(2):154-158.
[5]王庆雄.5 m大采高工作面过断层矿压显现规律研究[J].煤炭科学技术,2015(5):22-25.
[6]杨科,王志根,华心祝,等.超长大采高综采工作面过大落差断层技术及应用[J].煤炭科学技术,2016(6):89-93.
[7]丁楠,李小裕,蒋力帅,等.不同倾角下正断层下盘开采支承应力演化规律研究[J].煤炭技术,2018(2):91-93.
[8]柳研青,蒋金泉,张培鹏,等.逆断层倾角对断层两侧巷道围岩稳定性的影响[J].金属矿山,2017(4):157-161.
[9]李超,吕兆兴,任巍杰,等.不同倾向断层对大采高工作面矿压及顶板运移影响研究[J].煤炭工程,2016(4):86-88.
[10]李超.断层对大采高综采工作面矿压及顶板运移规律影响研究[D].太原:太原理工大学,2016.
[11]康希并,张建义.相似材料模拟中的材料配比[J].淮南矿业学院学报,1988(2):50-64.
[2]徐长全.地质构造对煤矿安全生产的影响分析[J].商品与质量,2017,26(2):208.
[3]孟召平,彭苏萍,冯玉,等.断裂结构面对回采工作面矿压及顶板稳定性的影响[J].煤田地质与勘探,2006,34(3):24-27.
[4]李志华,窦林名,牟宗龙,等.断层对顶板型冲击矿压的影响[J].采矿与安全工程学报,2008,25(2):154-158.
[5]王庆雄.5 m大采高工作面过断层矿压显现规律研究[J].煤炭科学技术,2015(5):22-25.
[6]杨科,王志根,华心祝,等.超长大采高综采工作面过大落差断层技术及应用[J].煤炭科学技术,2016(6):89-93.
[7]丁楠,李小裕,蒋力帅,等.不同倾角下正断层下盘开采支承应力演化规律研究[J].煤炭技术,2018(2):91-93.
[8]柳研青,蒋金泉,张培鹏,等.逆断层倾角对断层两侧巷道围岩稳定性的影响[J].金属矿山,2017(4):157-161.
[9]李超,吕兆兴,任巍杰,等.不同倾向断层对大采高工作面矿压及顶板运移影响研究[J].煤炭工程,2016(4):86-88.
[10]李超.断层对大采高综采工作面矿压及顶板运移规律影响研究[D].太原:太原理工大学,2016.
[11]康希并,张建义.相似材料模拟中的材料配比[J].淮南矿业学院学报,1988(2):50-64.
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