下保护层开采上覆岩层采动裂隙动态演化与分布特征研究

摘要

结合相似模拟试验研究，对平顶山煤业集团四矿开采下保护层后，上覆岩层的采动裂隙动态演化与分布特征进行分析，得出保护层在开采后随着工作面的推进顶板垮落的位置、垮落高度和裂隙的发育程度。%This paper research on dynamic evolution and distribution characteristics about minedcrack in overburden rock stratum, basing on the simulated material models. Through the analysis, the position and height of falled roof and the development evel of mined crack are identified.