矿井过断层底板注浆改造效果的数值模拟分析  

Numerical Simulation Analysis on the Effect of GroutingReconstruction in Coal Passing Through Fault Floor

作　　者：吕绍文[1,2] 汪华君[1,2] 王昌琪[1,2] 温良霞[1,2] 

机构地区：[1]贵州工程应用技术学院,贵州毕节551700 [2]西部矿井开采及灾害防治教育部重点实验室毕节研究室,贵州毕节551700

出　　处：《煤矿机电》2015年第1期56-60,共5页Colliery Mechanical & Electrical Technology

摘　　要：根据矿井的水文地质条件,建立煤层开采的ANSYS数值模型,模拟了断层条件下底板注浆改造前后采动破坏带的演化规律。结果表明:随着煤层开采的不断推进,底板破坏区主要集中在开挖煤层两侧及断层破裂带,且范围逐渐扩大并不断向断层带靠近,但注浆后底板及断层带力学性质得到显著改善,有效地封堵了底板水源。根据模拟结果设计了马坊煤矿三采区底板注浆加固工程,增强了底板的阻水能力,使断层处煤层得到安全回收,取得了显著的经济效益和安全效益。According to the hydro-geological conditions of coal mine, the numerical models are established with ANSYS. The numerical simulations are directed for revealing the failure evolution of the seam floor above confined aquifer before grouting and after when passing through fault floor. The simulation results show that the floor failure zone mainly concentrated in the two sides of mined coal and the fault fracture zone along with the mining of coal. Those zones would become bigger and closer to faults. But the mechanical properties of the floor and fault fracture zone gets remarkable improvement after grouting, and the floor water had been plugged effectively. Accordingly, the grouting firming projects are designed for the third mining area in Mafang mine, which reinforces the waterresisting strength of the coal seam floor. So the coal located in the faults is mined in security, and achieves remarkable economic and safety benefits.

关 键 词：承压水 数值模拟分析 注浆堵水 断层破裂带 

分 类 号：TD743[矿业工程—矿井通风与安全]