近距离煤层群超长工作面采场矿压分布及围岩运移规律研究

Study on Mining Pressure Distribution and Surrounding Rock Migration Law of Stope in Ultra-long Working Face of Short-distance Coal Seam Group

以叙永一矿15采区缓斜近距离多煤层群为研究对象,采用离散元数值模拟软件UDEC 6.0分别对其C19、C20、C24煤层开采过程中的采场围岩运移情况及应力分布规律进行了系统地分析研究,揭示了缓斜近距离多煤层群采动影响区内的复杂应力场分布、上覆岩层变形破坏形态及煤层间相互影响规律,所得研究结果可为近距离多煤层群的安全、经济、高效开采提供一定的参考及补充。

Taking the multi-coal group of slow-sloping and short-distance in the mining area of Xuyong No.1 mine as the research object,using the discrete element numerical simulation software UDEC 6.0,the systematic analysis and research on the surrounding rock migration and stress distribution of C19,C20,C24 coal seams have be carried out. It reveals the distribution of complex stress field, the deformation and failure mode of overlying strata and the mutual influence of coal seams in the mining affected zone of slow-sloping and short-distance multi-coal strata. The obtained research results can provide some reference and supplement for the safe,economical and efficient mining of short-distance multi-coal groups.