浅埋特厚煤层综放工作面覆岩运动破坏规律研究

Research on Failure Law of Shallow and Very Thick Coal Seam in Full-mechanized Top Coal Caving Faces

覆岩运动破坏规律对保护生态及矿井的安全生产具有重要意义。以酸刺沟煤矿为试验矿井,采用深基点和数值模拟试验对采动覆岩运动破坏规律进行研究。结果表明:酸刺沟煤矿综放开采覆岩两带高度分别为49.24 m和133.62 m,从煤层至地表,随着埋深的减小,岩层起始运动时间滞后,说明覆岩运动是自下往上逐渐发展的,且基点的相对位移量整体呈降低趋势。

Overburden movement law on protection of the ecological destruction and mine production safety is important. In Suancigou coal mine for the trial, with deep and numerical simulation on the basis of mining overburden failure law of motion study. Results showed that: Suancigou coal caving overburden two band heights of 49.24 m and 133.62 m,from coal to the surface, with the depth decreases, the rock start exercise time lag, and in addition to some basis points, overburden movement is evolving from the bottom up and bps the absolute amount of displacement as a whole is decreasing.