多煤层开采不同开采顺序时覆岩裂隙带高度模拟分析

Simulation of the Fracture Zone Height of Overburden in Different Mining Sequence of Multi-seam Mining

1930煤矿地处艾维尔沟下,属于地表水系开采,水体下开采时裂隙带高度对安全生产意义重大。为研究1930煤矿的4号、5号和6号煤层不同开采顺序条件下的覆岩裂隙带高度,采用UDEC数值模拟的方法进行分析。分别对3个煤层的开采顺序为4号→5号→6号和5号→4号→6号时的覆岩裂隙带高度进行模拟,结果显示:开采顺序为4号→5号→6号时的裂隙带高度为128 m,开采顺序为5号→4号→6号时的裂隙带高度为119 m,裂隙带距离水体距离分别是233 m和242 m。由此得出,不同开采顺序对覆岩裂隙带发育范围产生了影响,但最终裂隙带边缘与水体距离变化不大。

The 1930 coal mine is located in Ewirgol,which belongs to the surface water system mining. The height of the fracture zone is of great significance to the safety production during mining under water. The UDEC numerical simulation method is used to analyze the height of fracture zone of overburden under different mining sequence conditions,which are coal seam of No. 4,5 and 6 in 1930 coal mine. The height of the overburden fracture zone of the three coal seam are respectively simulated,when the mining sequence at No. 4→5→6 and No. 5→4→6. The result shows that the fractured zone height respectively is 128 m and 119 m when the mining sequence is No. 4→5→6 and No. 5→4→6,the distance from the fracture zone to the water is respectively 233 m and 242 m. It can be concluded that the different mining sequence has an effect on the development range of the fracture zone of overburden,but the distance between the edges of fracture zone to water body change not very much.