锦界矿回采巷道围岩破坏特征与支护参数优化
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摘要
针对巷道围岩破坏特征及稳定性控制问题,基于该类围岩的变形特点,对锦界矿某工作面平巷进行了锚固支护参数优化。通过钻孔窥视、岩心试验、松动圈测试等现场试验及数值模拟分析,分析了回采巷道受采动影响时围岩应力分布规律及围岩破坏特征,优化了巷道支护参数。结果表明:受工作面采动影响后,巷道两帮围岩破坏不大而顶底板完整;优化后顶板和两帮支护参数减少了支护强度。工程实践表明:优化后支护参数有效控制了巷道围岩变形,节约了支护成本,提高了掘进效率。
According to the deformation characteristics and stability control of surrounding rock of roadway, based on the deformation characteristics of surrounding rock, the anchoring support parameters of a working face in Jinjie Mine were optimized.Through the field test and numerical simulation analysis of borehole peeping, core test and loose circle test, the distribution law of surrounding rock stress and surrounding rock failure characteristics of mining roadway affected by mining are analyzed, and the roadway support parameters are optimized. The results show that the surrounding rock of the two sides of roadway is not damaged and the top and bottom plates are intact after the mining face is affected; the roof and the two supporting parameters reduce the support strength after the optimization. The engineering practice shows that the optimized support parameters can effectively control the surrounding rock deformation of the roadway, save the support cost and improve the tunneling efficiency.
According to the deformation characteristics and stability control of surrounding rock of roadway, based on the deformation characteristics of surrounding rock, the anchoring support parameters of a working face in Jinjie Mine were optimized.Through the field test and numerical simulation analysis of borehole peeping, core test and loose circle test, the distribution law of surrounding rock stress and surrounding rock failure characteristics of mining roadway affected by mining are analyzed, and the roadway support parameters are optimized. The results show that the surrounding rock of the two sides of roadway is not damaged and the top and bottom plates are intact after the mining face is affected; the roof and the two supporting parameters reduce the support strength after the optimization. The engineering practice shows that the optimized support parameters can effectively control the surrounding rock deformation of the roadway, save the support cost and improve the tunneling efficiency.
引文
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[12]刘洪涛,马念杰.煤矿巷道冒顶高风险区域识别技术[J].煤炭学报,2011,36(12):2043-2047.
[13]苏晓建.锦界矿回采巷道围岩破坏特征及控制技术研究[J].煤炭技术,2017,36(5):114-116.
[2]康红普.软岩巷道底鼓的机理及防治[M].北京:煤炭工业出版社,1993.
[3]康红普,司林坡,苏波.煤岩体钻孔结构观测方法及应用[J].煤炭学报,2010,35(12):1949-1956.
[4]刘洪涛,马念杰,王建民,等.回采巷道冒顶隐患级别分析[J].煤炭科学技术,2012,40(3):6-9.
[5]赵志强.大变形回采巷道围岩变形破坏机理与控制方法研究[D].北京:中国矿业大学(北京),2014.
[6]张明磊,张益东,季明,等.基于模糊可拓综合评价方法的巷道支护参数优化[J].采矿与安全工程学报,2016,33(6):972-978.
[7]王猛,牛誉贺,于永江,等.主应力演化影响下的深部巷道围岩变形破坏特征试验研究[J].岩土工程学报,2016,38(2):237-244.
[8]董方庭.巷道围岩松动圈支护理论及应用技术[M].北京:煤炭工业出版社,2001.
[9]张益东.锚固复合承载体承载特性研究及在巷道锚杆支护设计中的应用[D].徐州:中国矿业大学,2013.
[10]余伟健,高谦,韩阳,等.不稳定围岩开挖与让压支护的优化设计及数值分析[J].煤炭学报,2008(1):11.
[11]余伟健,王卫军,张农,等.深井煤巷厚层复合顶板整体变形机制及控制[J].中国矿业大学学报,2012,41(5):725-732.
[12]刘洪涛,马念杰.煤矿巷道冒顶高风险区域识别技术[J].煤炭学报,2011,36(12):2043-2047.
[13]苏晓建.锦界矿回采巷道围岩破坏特征及控制技术研究[J].煤炭技术,2017,36(5):114-116.