采场矿压与覆岩运动的机械模拟实验研究
Experimental Study on Mechanical Simulation of Mining Pressure and Overlying Strata Movement
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摘要: 以华丰煤矿特殊地质条件下厚煤层开采为研究对象,利用采场矿压机械模拟实验台,进行了采动过程中支承压力发展演化与覆岩运动规律的机械模拟实验。实验结果表明:支承压力随煤层推采发生明显的变化,塑性区压力逐渐上升,弹性区压力则单调下降;覆岩形成组合结构有规律的运动,离层呈现出动态变化的特性;最大下沉值随工作面开采不断变大且最大下沉值点逐渐向开采方向发展。Abstract: Taking thick coal seam mining with special geological condition of Huafeng coal mine as the research object,the mechanical simulation experiment of abutment pressure development and overlying strata movement laws during mining process were carried out by using mechanical simulation testing bench of mining pressure.The experimental results showed that abutment pressure had significant change with coal seam mining,and the pressure in plastic zone rised gradually while in elastic zone decreased monotonically;overlying strata formed composite structure and moved regularly,and bed separation had a characteristics of dynamic change;the maximum subsidence increased with the working face mining and maximum subsidence point gradually developed to the mining direction.
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