摘要
利用数值计算方法，研究了最大水平主应力对巷道围岩稳定性的影响。结果表明，最大水平主应力方向与巷道轴向方向夹角对巷道围岩稳定性的影响大致可以分为3个阶段。0°～20°为第1阶段，巷道两帮较顶、底板承载更高的围岩应力，要注重巷道两帮的支护；20°-50°为第2阶段，巷道两帮与顶、底板承载相同的围岩应力，应采用相同的支护强度；50°～90°为第3阶段，巷道顶、底板承载的围岩应力远高于巷道两帮，要特别注重巷道顶、底板的支护，夹角越大，项、底板支护强度越高。
The influence of maximum horizontal principal stress on the stability of surrounding rock of roadway was studied bu numerical simulation. The results indicate that the influence of the angle between the orientation of maximum horizontal principal stress and the axial orientation of roadway on the surrounding rock stability of roadway can be classified into three phases, i. e. , it is the first phase when the angle is 0° -20° ,in which the two sides of roadway bear higher surrounding rock stress than its roof and floor, here more considerations should be given to the wall supporting;it is the second phase when the angle is 20°- 50° ,in which the two sides of roadway bear the same surrounding rock stress as its roof and floor,so the same supporting strength should be taken for its two sides, roof and floor ; it is the third phase when the angle is 50°-90° ,in which the roof and floor of roadway bear much higher surrounding rock stress than its two sides, so more considerations should be given to the roof and floor supporting, and larger the included angle is, stronger the supporting strength of roadway＇s roof and floor should be.
出处
《矿业研究与开发》
CAS
北大核心
2008年第1期62-64,共3页
Mining Research and Development
关键词
最大水平主应力
巷道围岩
数值分析
巷道支护
Maximum horizontal principal stress, Surroundingrock of roadway, Numerical analysis, Roadway support
