为得到厚煤层大采高综放开采煤岩体冒落规律,采用改进的非连续变形数值模拟分析DDA软件研究不同回采阶段大采高综放开采工作面的应力场及煤岩体运移规律。结果表明:随着工作面的回采,采场周围的圆形应力场逐步转变为椭圆形应力场,且出现3个明显的分区,即应力释放区、应力升高区及两者间的过渡区,同时水平位移随时间变化较为复杂,而垂直位移变化具有一定的规律,通过垂直位移的变化可将上覆岩层划分为"三带",得到了大采高综放工作面覆岩和顶煤运移规律。

In order to have the coal and rock falling down law of the high cutting fully mechanized top coal caving mining in thick seam, the improved discontinuous deformation numerical simulations DDA software was applied to study the stress field and the coal and rock migration law of the high cutting fully mechanized top coal C aving mining at different mining stages.The results showed that with the mining operation of the coal mining face, the round stress filed surrounded the coal mining face would steadily change to be an elliptical stress field.There would be three obvious zones and they were a stress released zone, a stress increased zone and a transit zo ne between the above zones.Meanwhile, the horizontal displacement varied with the time would be complicated and the vertical displacement variation would have a ce rtain law.With the vertical displacement variation, the overburden strata could be divided into three zones and the overburden strata and top coal migration law of the hi gh cutting fully mechanized top coal caving mining face could be obtained.

国家重点基础研究发展计划(973计划)资助项目(2010CB732002)；国家自然科学基金资助项目(11102225)；教育部新世纪优秀人才支持计划资助项目(NCET-09-0726)；高等学校全国优秀博士学位论文作者专项资金资助项目(201030)；