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以实验室相似材料模拟试验和现场放煤工艺试验为依据，对综放开采分层厚度和放煤工艺形式进行了深入的研究，指出针对大雁矿务局二矿３０＃煤层的实际情况，采用分二层综放开采和一刀一放单轮间隔的放煤工艺形式为提高回采率、降低原煤含矸率的有效途径
Based on the laboratory simulation experiment of similar material and the coal caving test in the field, the stratified thickness and coal caving technology form of fully mechanized caving mining are studied in depth. According to the actual situation of 30 # seam in No.2 Mine of Dayan Mining Bureau, Divided into two layers of fully mechanized caving mining and a knife put a single round of the interval of the form of caving technology to improve recovery rate and reduce the effective rate of raw coal refuse