青海江仓矿区娘姆特煤矿是世界上第一座在高原高寒地区正在建设的大型井工开采煤矿。由于矿井地处高原高寒地区，基岩上部覆盖着较厚的永冻层，而且煤层倾角大，矿井开采条件特殊。研究认识矿井开采引起的永冻层及覆岩破坏规律是保证矿井安全高效开采的重要基础之一。 本文通过相似材料模拟实验、数值计算和理论分析方法，对娘姆特煤矿永冻层下大倾角煤层开采覆岩破坏规律进行了研究。通过反复试验得到了常温下模拟实验中模拟永冻层的相似材料及配比，通过物理模拟实验及数值模拟实验得到了永冻层和覆岩的变形破坏形态、破坏范围、采高对破坏高度的影响等基本特征，综合分析认为永冻层下大倾角煤层开采时永冻层初次破坏将呈现横向O-X式破断形态，永冻层周期性破断将对工作面矿压显现产生一定影响，覆岩破坏仍然具有比较明显的分带性和不对称性。文中还分析得到了区段煤柱的合理尺寸和不同开采高度下覆岩的破坏高度。

Qinghai Jiangcang NiangMute mine is the first large underground coal mine establishing in high altitude alpine region in the world. The mine is located in plateau alpine region, the upper part of the bedrock is covered with thick permafrost, and the angle of coal seam is large, which make the conditions of the underground mining special. Studies suggest that the law of permafrost and overlying strata failure due to underground mining is one of the important basis to ensure mining safely and efficiently. In this paper, through similar material simulation experiments, numerical calculation and theoretical analysis method, the overburden rock destruction features when mining steeply dipping seam beneath the permafrost in NiangMute mine is studied. The similar material and the ratio to simulate permafrost at normal temperature is got through repeated experiments. Through physical simulation and numerical simulation, the deformation and failure morphology of the permafrost layer and overlying strata, the extent of damage, the failure height influenced by mining height, and so on are studied. Comprehensive analysis indicated that the initial destruction of permafrost in steeply dipping seam mining will show horizontal O-X breaking model, periodically breaking of permafrost will bring face pressure a certain impact, and the destruction of overlying strata is still more obvious zonation and asymmetry. The reasonable size of coal pillar and the failure height of overlying strata at different mining height are also analyzed.