孤岛面采场压力拱拱体形态特征

Morphological Characteristics of Pressure Arch of Island Coal Face Overburden Strata

利用有限差分数值模拟软件Flca3d,根据皖北煤电集团任楼煤矿117212孤岛工作面的实际开采情况,模拟分析孤岛工作面采场覆岩压力拱的形态,并与相同地质条件下的非孤岛工作面与半岛工作面形成的拱形态进行比较,弄清了孤岛采场压力拱拱体形态的特征。研究表明,孤岛工作面采场压力拱的拱内应力增加,但压力拱的拱带宽度明显减小,拱高降低。研究结果加深了对孤岛工作面覆岩压力拱结构特征的认识,进一步解释了孤岛面采场矿压显现剧烈的现象。

Based on the exploration of II7212 Renlou Coal Mine island eoalface conducted by Wanbei Coal-Electricity Group Co. ,Ltd, the patterns of pressure arch of overburden strata of island coalfaee stope are simulated and analyzed with the help of finite difference numerical simulation software. Then them are compared with those of peninsula face and non island face in the same geographical conditions. In this way, the properties and features of pressure arch of island coalface can be clearly understood. The researches indicate that with the increase of pressure arch of island eoalface, the band of pressure arch narrowed substantially, and so is the height of pressure arch. The results deepen the understanding of structures of pressure arch of island coal face overburden strata and further explains steep change of rock pressure.