煤矿充填体作用数值模拟研究及其机理分析

为了在建筑物下、水体下和铁路下采煤技术中应用条带开采技术和绿色充填开采技术,采用数值模拟方法,模拟研究了在条带开采后充填与否条件下不同采出率开采方案的煤柱、充填体的受力及变形状态,定量计算了不同采出率开采方案的地表沉陷量;较系统研究了充填体在采动围岩系统中的作用机理。结果表明,通过煤柱和充填体的垂直应力支撑、充填体的侧限作用,充填体能有效改善煤柱和围岩系统的应力条件,而煤柱和充填体的垂直应力与充填体水平应力随着采出率和留宽而变化趋势具有规律性,充填条带开采法是将来"三下"压煤绿色开采的有效途径。

Numerical Simulation Study and Mechanism Analysis on Backfill Material in Coal Mine

In order to promote the strip mining technology and the mine green backfill mining technology for the coal mining technology under the buildings,water body and railway line and to fully play the unique advantages,the numerical simulation method was applied to simulate and study the stressed and deformation conditions of the coal pillars and backfill material for different coal recovery mining plan with the backfill.The paper quantitatively calculated the surface ground subsidence value for the different coa...