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针对江仓娘姆特矿地表覆盖多年冻土层的具体地质条件,通过相似模拟和数值模拟的方法研究了区段煤柱尺寸对煤层覆岩垮落特征和地表多年冻土层变形破坏规律的影响。研究结果表明:煤柱宽度对工作面局部覆岩垮落高度和结构特征均存在一定的影响,但是对覆岩垮落高度的影响不大。随着煤柱宽度增加,地表冻土层的竖直位移量逐渐减小,但水平位移变化不大,冻土层与覆岩之间的离层现象逐渐消失。
In view of the specific geologic conditions of permafrost covering the Nang Mute mine site in Jiangcang, the influence of section size on the caving characteristics of overburden strata and the deformation and failure of the permafrost layer was studied by similar simulation and numerical simulation. The results show that the coal pillar width has some influence on the caving height and structural characteristics of the overburden strata in the working face, but has little effect on the caving height of the overlying strata. With the increase of coal pillar width, the vertical displacement of surface frozen soil gradually decreases, but the horizontal displacement does not change much, and the phenomenon of layer separation between permafrost and overburden gradually disappears.