摘要
针对义马矿区煤层顶板巨厚砾岩层垮落引起的动载荷,通过FLAC3D数值计算,研究动载荷幅值的大小对静压巷道围岩应力场、位移场及塑性区范围的影响。模拟结果表明:随着动载荷幅值的增加,巷道顶板下沉量和煤壁位移量迅速增大,但变形速率逐渐减小,最终趋于零。随着动载峰值增大巷道围岩塑性区范围增大。
In view of the dynamic load caused by roof fracture of thick gravel strata over the coal seam in Yima mining area of China,using FLAC3 Dnumerical calculations,studied the influence of changing the dynamic load amplitude on the stress field,displacement field and plastic zones of surrounding rock in static pressure roadway. The simulation results show that the values of roof subsidence and rib displacement are increasing rapidly with the increase of amplitude of dynamic load,but the deformation rates decrease,and finally tend to zero. With the increase of load peak amplitude,the range of the plastic zone of gateway surrounding rock is increase.
出处
《煤炭技术》
CAS
北大核心
2015年第1期32-34,共3页
Coal Technology
基金
国家自然科学基金资助项目(51074065
51104056)
关键词
顶板破断
冲击载荷
深井巷道
动载荷幅值
扰动应力波
roof fracture
impact load
roadway in deep shaft
dynamic load amplitude
disturbance-stress wave