两软薄煤层综采面矿压显现规律研究

A study on the law of mine pressure behaviors at a fully mechanized longwall coal face in a soft thin coal seam with soft roof and floor

对两软薄煤层综采工作面液压支架工作阻力进行实时监测,研究了薄煤层工作面在走向和倾向上的顶板压力分布规律,得出其来压动载强度系数为1.28,薄煤层开采来压强度较小;对回采巷道顶底板及两帮移近量进行了监测和分析,得出了薄煤层开采超前支承压力可分为三个区的特征规律。

Based on a real-time monitoring of work resistance of the hydraulic supports in a fully mechanized longwall coal face in a soft thin coal seam with soft roof and soft floor,roof pressure distribution along the strike and dip of the thin seam is studied.It is found that the ground pressure dynamic load factor is 1.28,with a less ground pressure strength in thin seam mining.The roof to floor and the rib-to-rib convergence of the gateways were monitored and analyzed and the three-zone characteristics of advanced abutment pressure on soft coal seam mining are found.The results provide a basis for a reasonable maintenance of the gateways.