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破碎顶板下综采冒顶是较常见的事故,而且影响时间长,对人身和设备安全威胁大,又是影响综机充分发挥效能的重要因素。根据生产技术条件,分析冒顶原因,从中寻求防治片帮、冒顶的有效方法,对实现综采面稳产高产,安全生产,具有重要意义。 一、基本情况 杨庄矿Ⅱ611~W综采面直接顶为页岩,厚4米,老顶为砂质页岩,厚5～10米,底板为条带状砂质页岩,煤层平均厚度3.1米,煤层倾角8～12°,煤硬度f=0.8～1.8。工作面装备为:联邦德国产G320—20/36型掩护式支架78架、
It is a common accident that the roof of fully mechanized coal mining under the broken roof is affected by a long time, which poses a great threat to personal and equipment safety. It is also an important factor that affects the performance of a fully mechanized mining machine. According to the conditions of production technology, it is of great significance to analyze the causes of roof fall and seek effective ways of preventing and controlling vanes and falling from the roof. It is of great significance to realize stable, high yield and safe production of fully mechanized coal mining face. First, the basic situation Yangzhuang Ⅱ 611 ~ W fully mechanized mining face directly to the top of the shale, 4 meters thick, the old top for sandy shale, thickness 5 to 10 meters, the bottom of the strip of sandy shale, the average thickness of the coal seam 3.1 meters, coal seam dip 8 ~ 12 °, coal hardness f = 0.8 ~ 1.8. Face equipment: Federal Republic of Germany G320-20 / 36-type shield bracket 78,