半煤岩回采巷道围岩稳定性及控制的数值分析.pdfVIP

学兔兔 第17卷第1期 (总第104期) 煤 矿 开 采 Vo1．17No．1(Series No．104) 2012年2月 Coal mining Technology February 2012 半煤岩回采巷道围岩稳定性及控制的数值分析 金 淦 ，郝光生 (1．山西煤炭运销集团忻州有限公司，山西忻州034000；2．中国矿业大学矿业学院，江苏徐州221008) [摘 要] 针对袁庄煤矿IV622工作面的半煤岩回采巷道，为有效控制回采巷道围岩的稳定， 以圆形巷道围岩弹塑性变形范围及位移场分布作理论分析，得出除考虑反映岩石自身强度等因素外， 如何提高支护阻力P 是控制巷道围岩稳定的关键；按实际地质条件建立数值计算模型，数值分析无 支护状态和锚网支护及对支护承载结构进行结构补偿后半煤岩回采巷道的弹塑性变形范围及位移场分 布特征，提出合理围岩控制方案。对半煤岩回呆巷道围岩稳定性分析及围岩控制中合理的结构补偿位 置分析具有重要指导意义。 [关键词] 半煤岩；回采巷道；位移场；围岩控制；数值模拟 [中图分类号]TD322．4 [文献标识码]A [文章编号]1006—6225(2012)01—0055—04 Numerical Simulation of Anchored Rope Supporting in Half-coal and Half-rock Roadway JIN Gan ，HAO Guang．sheng (1．Xinzhou Co．，Ltd，Shanxi Coal Marketing Group，Xinzhou 034000，China； 2．Mining Schoo1．China University of Mining＆Technology，Xuzhou 221008，China) Abstract：In order to effectively control the stability of half-coal and half-rock roadway in 1V622 mining face of Yuanzhuang Colliery， applying elastic—plastic theory of round roadway，the result was obtained that for controlling roadway stability，except for rock strength， how to improve supporting resistance was a key problem．Elastic—plastic deformation zone and displacement field distribution under the condition of no—supporting，anchored—mesh supporting and structure—compensation supporting were analyzed by numerical model based on actual geological condition．On the basis of this，rational surrounding rock control project was present．It is very important that analy— zing surrounding rock stability of half-coal and half-rock roadway and analyzing rational position of structure-·compensation in surround-- ing rock control for this kind of roadway． Key