煤厚变异区采动应力分布规律的数值模拟研究  

Numerical Simulation Study of Mining Stress Distribution Law in Coal Thickness Variation Area

作　　者：赵军利 吴桂明 张文晓 ZHAO Junli;WU Guiming;ZHANG Wenxiao(Shaanxi Shaanmei Hancheng Mining Co.,Ltd.,Weinan 715400,China;School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]陕西陕煤韩城矿业有限公司,陕西渭南715400 [2]中国矿业大学安全工程学院,江苏徐州221116

出　　处：《煤炭技术》2023年第4期56-60,共5页Coal Technology

基　　金：国家自然科学基金项目(51874291)。

摘　　要：针对煤层开采过程中出现的煤层厚度变化情况,采用数值模拟的方法研究煤层厚度变异区域的原岩应力分布特征、煤层开采过程中的应力以及应变能的演化规律。在模拟过程中分别进行了薄向厚开采以及厚向薄开采,计算结果表明,当回采工作面逐渐靠近煤厚变异区时,采掘应力场受煤厚影响明显。由厚煤区向薄煤区开采时,应力集中系数远大于薄煤区向厚煤区开采,应变能也由于煤厚的变化造成由厚向薄开采时的变化梯度大于由薄向厚开采,因此由厚向薄开采动力现象发生的可能性更大。According to the change of coal seam thickness in the process of coal seam mining,the distribution characteristics of original rock stress in the area of coal seam thickness variation and the law of stress evolution in the process of coal seam mining are studied by numerical simulation.In the simulation process,thin to thick mining and thick to thin mining are carried out respectively,the calculation results show that when the mining face is gradually close to the coal thickness variation area,the mining stress field is obviously affected by the coal thickness.When mining from thick coal area to thin coal area,the stress concentration factor is much greater than that from thin coal area to thick coal area,and the possibility of dynamic phenomenon is greater.

关 键 词：煤厚变化 煤岩动力灾害 地应力 数值模拟 应力集中 

分 类 号：TD323[矿业工程—矿井建设] TD821