常村煤矿S6-8工作面岩层运动的连续-非连续方法模拟

为了细致地模拟煤矿开采中复杂的岩层运动现象，探讨开采速度的影响，采用自主开发的连续-非连续方法，通过引入应力跌落和准静力计算模式，以常村煤矿S6-8工作面为背景建立数值模型，模拟采动诱发采场上覆岩层的变形-开裂-运动过程。结果表明:本方法可较为细致地模拟煤矿开采中一系列复杂现象，例如，采场上覆岩层的弯曲变形、下沉、开裂、离层和层间错动、直接顶的周期垮落、工作面煤壁上方岩层近似平行展布的倾斜穿层裂缝、若干破断岩块形成的近似等腰梯形结构和采空区局部闭合；开采速度越快，直接顶初次垮距越大，这是由于采场上覆岩层向下运动不充分，直接顶垮落主要受自身和开采卸荷的影响。

Simulation on strata motion of S6-8 working face in Changcun coal mine with continuum discontinuum method

In order to simulate the complex phenomenon of strata motion during the mining of coal mine in detail,and discuss the influence of mining velocity,through applying the self-developed continuum-discontinuum method and introducing into the stress drop and quasi-static calculation mode,a numerical model was established by taking the S6-8 working face in Changcun coal mine as the background,and the deformation cracking motion process of overlying strata in the stope induced by mining was simulated.The results showed that this method could simulate a series of complex phenomena during the mining of coal mine in detail,such as the bending deformation,subsidence,cracking,abscising layer and shear movement of overlying strata in the stope,the periodic collapse of immediate roof,the inclined across-layer fracture with approximately parallel traversing in the strata above the coal wall of working face,the approximately isosceles trapezoid structure formed by some fracturing rock block,and the local closure of goaf.The faster the mining velocity,the larger the first collapse distance of immediate roof,which was due to the downward motion of overlying strata in the stope was insufficient,and the collapse of immediate roof was mainly affected by itself and mining unloading.