某煤矿1304工作面顶板冒裂带高度研究

摘要

Based on the composition and structural characteristics of the floor and roof rock strata in 1304 working face in a mine,composition and structural properties of the 1304 coal face in a coal mine,an engineering geological model that can reflect the composition of the complete roof strata was established,analysis was made on the roof stress and the distribution characteristics of the plastic zone by FLAC3D numerical simulation in the mining process of the coal seam,and 64m roof fall height of the coal seam being mined was obtained. Combined with the results obtained by analogy method,it came to the conclusion that the roof fall height of 1304 working face was 34. 6~77. 5m.%　　根据某煤矿1304工作面煤层顶底板岩层组合及结构性质特点，建立反映完整顶板岩层组合的工程地质模型，通过FLAC3D数值模拟分析了煤层开采过程中顶板应力及塑性区分布特征，得出采动煤层顶板冒裂带高度为64 m。并采用类比法分析所得冒裂带高度，综合对比分析得出1304工作面顶板冒裂带高度为34.6~77.5 m。