摘要
为分析兴宁一矿1207工作面垮落法开采和充填开采后,覆岩破坏范围和超前支撑压力分布特征,采用UDEC数值模拟的方法,根据1207工作面的地质采矿条件建立数值模拟模型,分别对垮落法开采和充填开采后的覆岩破坏范围和超前支撑压力进行模拟。模拟得出垮落法开采和充填开采时覆岩破坏范围分别是30 m和2 m,超前支撑压力峰值位置分别为4 m和1 m,峰值分别为22 MPa和17 MPa,超前影响范围分别为25 m和15 m。可以得出充填法开采相较于垮落法开采对覆岩应力分布和破坏范围的影响减弱很多。
In order to analyze the failure scope of overlying rock and the distribution characteristics of the leading support pressure in the1207 working face of Xingning No. 1 coal mine after caving and filling mining,the UDEC numerical simulation method is adopted in this paper. According to the geological and mining conditions of the 1207 working face,a numerical simulation model is established to simulate the overlying rock failure area and the pre support pressure after caving mining and filling mining respectively. Simulation of caving mining and backfill mining overburden failure range were 30 m and 2 m,advanced support pressure peak position were 4 m and1 m,the peak were 22 MPa and 17 MPa,advance the influence ranges of 25 m and 15 m. It can be concluded that the influence of mining by filling method on stress distribution and damage extent of overlying rock is much less than caving mining.
出处
《煤》
2018年第2期11-14,共4页
Coal
基金
国家自然科学基金资助项目(50704024)
关键词
覆岩破坏范围
超前应力
UDEC数值模拟
充填开采
垮落法开采
overburden failure area
advance stress
UDEC numerical simulation
filling mining
caving mining method
