深井高地应力节理化巷道围岩支护设计数值模拟研究
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摘要
为确定深井高地应力节理化巷道围岩变形原因及其支护技术,通过地应力测试、围岩窥视、数值模拟的研究方法,对变形破碎回采巷道进行了研究,研究结果表明:巷道破碎的主要原因为最大主应力方向与巷道轴向垂直,巷道围岩为节理化破碎围岩;针对矿山巷道的地质条件,基于正交试验法确定了6种支护方案,并采用FLAC3D对支护方案进行了数值模拟,根据各方案塑性区的模拟结果,最终选择方案五作为破碎回采巷道的支护方案。
In order to determine the deformation reasons and the supporting technology of surrounding rock in deep joint-controlled roadway with high ground stress,the deformation and crushing mining roadway was researched through the study of geostress test,peering of surrounding rock and numerical simulation.The results showed that,the main reason of the broken roadway was that the direction of the maximum principal stress was perpendicular to the axial direction of the roadway,and the surrounding rock of the roadway was joint-controlled broken type.Aimed at the geological conditions of the mine roadways,6 supporting schemes were determined based on orthogonal test,and simulated by FLAC~(3D).According to the simulation results of the plastic zone for each scheme,the No.5 scheme was determined as the final supporting scheme of crushing mining roadway.
In order to determine the deformation reasons and the supporting technology of surrounding rock in deep joint-controlled roadway with high ground stress,the deformation and crushing mining roadway was researched through the study of geostress test,peering of surrounding rock and numerical simulation.The results showed that,the main reason of the broken roadway was that the direction of the maximum principal stress was perpendicular to the axial direction of the roadway,and the surrounding rock of the roadway was joint-controlled broken type.Aimed at the geological conditions of the mine roadways,6 supporting schemes were determined based on orthogonal test,and simulated by FLAC~(3D).According to the simulation results of the plastic zone for each scheme,the No.5 scheme was determined as the final supporting scheme of crushing mining roadway.
引文
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[3]张佳飞,王开,张小强,等.蠕变破坏影响下残采煤柱宽度数值研究[J].矿业研究与开发,2017,37(11):51-54.
[4]焦雪峰,张文杰,康天合.节理岩体强度及其破坏机制研究[J].矿业安全与环保,2012,39(1):10-13.
[5]王卫军,罗立强,黄文忠,等.高应力厚层软弱顶板煤巷锚索支护失效机理及合理长度研究[J].采矿与安全工程学报,2014,31(1):17-21.
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[8]郝育喜,王炯,王浩,等.深井断层破碎带穿层软岩巷道锚网索耦合控制对策[J].采矿与安全工程学报,2016,33(2):231-237.
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