【摘要】 通过FLAC3D软件对大采高采场工作面推进过程中煤岩内部应力场分布规律及其塑性破坏进行了模拟,并提取了各个单元的应力值,以此分析了大采高采场支承压力的分布特征,得出大采高采场支承压力分布规律。从而为研究大采高采场工作面煤壁的片塌、端面冒顶和底板鼓起的机理、顺槽超前巷道的支护设计、冲击地压和煤层突出等矿井灾害的预防提供了重要理论依据。更多还原

【Abstract】 The distribution laws of stress fields and plastic failure with the distance of coalface advance in the large mining height workface are simulated by means of FLAC3D software,and the stress value in each unit is obtained. According to the simulation,the distribution characteristics of abutment pressure in the workface is analyzed. Then the distribution law of abutment pressure in large mining height workface is found,which offers a theovitical base for the research on the rules of rib fall,roof failure and floor heave,the support design of advance roadway and prevention of colliery disasters.更多还原