摘要
通过UDEC数值模拟研究了"两硬"薄煤层采空区煤柱下支承压力分布规律,结果表明:"两硬"近距离煤层采空区煤柱下工作面侧向支承压力可达16.1 MPa,沿空留巷巷旁充填体需要具有一定的"让-抗"特性。通过理论计算和FLAC^(3D)数值模拟分析确定了巷旁充填体参数,即巷旁充填体宽度为2.0 m,充填体终凝强度不低于25 MPa,通过对该矿88105工作面运输巷沿空留巷围岩移近量监测,结果表明按此参数沿空留巷效果较好。
The support pressure distribution law of the coal pillars under goaf in ＂ two hard＂ and thin coal seam was studied through the UDEC numerical simulation. Results showed that lateral support pressure of the working face under the coal pillar of goaf in ＂ two hard＂ and thin coal seam reached 16. 1 MPa,and the filling body beside roadway needed to have a certain features that was ＂ yield- resistance＂. Through the analysis of theoretical calculation and numerical simulation of FLAC-（3D）,parameters of filling body beside roadway were defined that the width of filling body beside roadway was 2. 0 m Pa,and the final strength was not less than 25 MPa. Through the deformation monitoring of surrounding rocks in the 88105 working face transportation roadway,and results showed that this effect of gob- side entry- retaining was better off according to this parameter.
出处
《煤矿安全》
CAS
北大核心
2015年第12期88-91,共4页
Safety in Coal Mines
关键词
“两硬”薄煤层
采空区下
侧向支承压力
沿空留巷
数值模拟
矿压监测
＂ two hard＂ and thin coal seam
under goaf
lateral support pressure
gob-side entry retaining
numerical simulation
rock pressure monitoring
