软煤层复合顶板巷道围岩受力变形规律试验研究
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摘要
以澄合矿区为工程背景,采用相似模拟试验方法,对软煤层复合顶板巷道围岩应力-变形及破坏规律开展研究,其目的是为巷道支护措施提供科学依据。结果表明:对于软煤层复合顶板巷道,两帮软弱煤层在很低的地应力作用下,首先发生明显变形破坏并向深部迅速转移,从而加剧了复合顶板的极早破坏。因此,对于软弱复合顶板巷道而言,两帮稳定性控制是整体巷道的稳定性控制的关键。
The Chenghe mining area is taken as the engineering background. Similar simulation test method is used to study the stress-deformation and failure law of surrounding rock in soft coal seam composite roof.Its purpose is to provide scientific basis for roadway support measures. The research results show that for soft coal seam composite roof roadways. Two weak coal seams under the action of very low ground stress, the first obvious deformation and damage to the deep transfer quickly, which exacerbated the very early destruction of the composite roof. Therefore, for the soft composite roof roadway, the stability of the two roads is the key to the stability control of the overall roadway.
The Chenghe mining area is taken as the engineering background. Similar simulation test method is used to study the stress-deformation and failure law of surrounding rock in soft coal seam composite roof.Its purpose is to provide scientific basis for roadway support measures. The research results show that for soft coal seam composite roof roadways. Two weak coal seams under the action of very low ground stress, the first obvious deformation and damage to the deep transfer quickly, which exacerbated the very early destruction of the composite roof. Therefore, for the soft composite roof roadway, the stability of the two roads is the key to the stability control of the overall roadway.
引文
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[3]常聚才,谢广祥.深部巷道围岩力学特征及其稳定性控制[J].煤炭学报,2009,34(7):881-886.
[4]岳中文,杨仁树,闫振东,等.复合顶板大断面煤巷围岩稳定性试验研究[J].煤炭学报,2011,36(S1):47-52.
[5]张红柱.迎回采工作面沿空巷道围岩稳定性机理及控制技术研究[J].煤炭技术,2014,33(10):123-125.
[6]柏建彪,侯朝炯,杜木民,等.复合顶板极软煤层巷道锚杆支护技术研究[J].岩石力学与工程学报,2001(1):53-56.
[7]邓鹏海,张文科,刘昂.三软煤层巷道支护关键技术研究[J].煤炭技术,2014,33(4):118-121.
[8]谷拴成,苏锋,崔希鹏.煤巷复合顶板变形破坏规律分析[J].煤炭科学技术,2012,40(5):20-23,62.
[9]王建宇.地下工程锚喷支护原理和设计[M].北京:中国铁道出版社,1980.
[10]勾攀峰,侯朝炯.回采巷道锚杆支护顶板稳定性分析[J].煤炭学报,1999,24(5):466-470.