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导水裂隙带高度是水下采煤的主要依据,通过相似材料模拟对高头窑煤矿水多湖川河下浅埋煤层开采时导水裂隙带高度进行了研究。结果表明:相似材料试验和“三下”开采规程预测高头窑煤矿煤层开采导水裂隙带高度有一定的差距。随着采高的增加,两者相差越来越大。高头窑煤矿水多湖川采煤时裂采比为15,煤层开采是需要进行采高控制,h≤H/19,以达到控制导水裂隙带高度的目的,实现河下采煤的安全开采。
The height of water-conducting fractured zone is the main basis for underwater coal mining. The similar material simulation is used to study the height of water-conducting fractured zone when mining shallow and shallow coal seam beneath Huhuntao Coal Mine. The results show that there is a certain gap between the similar material test and the “three times” mining regulation to predict the height of water-conducting fracture zone in seam mining of Gaotouyao coal mine. With the increase of mining height, the difference between the two is getting bigger and bigger. The coal-to-water ratio of the Kaohutou coal mine when mining lake water is 15, and the mining of coal seam requires the control of mining height, h≤H / 19 in order to achieve the goal of controlling the height of water-conducting fracture zone and realize the safe mining of coal under the river .