摘要
基于柴里矿二水平南轨上山实际地质开采条件,采用UDEC数值模拟计算,对岩层移动模拟研究中初始地应力场对巷道围岩稳定性的影响进行了研究。研究结果表明,地应力的大小、方向对巷道围岩稳定性影响很大,巷道两帮移近量、顶板下沉量和底板底臌量整体上都随着侧压系数增大而增大;巷道顶、底板和两帮内围岩垂直应力随着侧压系数增大而增大,当侧压系数超过1.5以后,随着侧压系数增大,两帮支承压力峰值逐渐趋于一定值,且支承压力峰值位置有靠近巷帮的趋势;巷道两帮和顶底板岩层不同层位处的位移大小和方向是不同的,两帮和顶底板一定距离内存在着位移为0的点或面。
Based on the actual geological condition of south rail at No. 2 Level in Chaili Mine, some research was done for the influence of initial crustal stress field on stability of roadway surrounding rock in the simulation of strata movement by UDEC numerical simulation computation. The findings indicated that the magnitude, direction of crustal stress has a big influence on stability of roadway surrounding rock, and the side-to-side convergence, the roof-to-floor convergence of roadway all increased with the increase of lateral pressure coefficient, vertical stress of roof and floor and surrounding rock among two sides also increased with the increase of lateral pressure coefficient. As lateral pressure coefficient exceeds 1.5, the abutment pressure peak values of two sides tend gradually to be a certain value with the increase of lateral pressure coefficient, and position of it tends to be adjacent to roadway sides. The magnitude and direction of displacement at different level are different in two sides, roof and floor of roadway. There are spots or surface with zero displacement in certain distance between two sides or roof and floor.
出处
《矿冶工程》
CAS
CSCD
北大核心
2008年第6期1-4,共4页
Mining and Metallurgical Engineering
基金
河南省教育厅自然科学研究计划项目(2008A440006)
河南理工大学博士基金(648234)
关键词
初始地应力
巷道
围岩
稳定性
initial crustal stress
roadway
surrounding rock
stability
