松软煤体垮落孔洞特征分析

Caving Hole Features Analysis of Soft Coal Body

复杂地质构造条件下揭露松软煤层时,煤体极易发生垮落形成孔洞。针对煤层赋存及实际开采情况,采用数值模拟方法对松软煤体垮落孔洞的形态特征进行分析,同时进行孔洞形态的现场考察分析,确定了该矿松软煤体垮落孔洞的最大高度为22 m,最大垮落宽度为7.5 m,同时确定了确定了垮落区域呈现椭球体的形态特征。

When the soft coal seam was uncovered under the conditions of complicated geological structure, the coal is prone to collapse and form holes. According to the coal seam and the actual mining situation, the soft coal caving hole features were analyzed by simula- tion methods, at the same time, the hole forms were studied with site investigation, the soft coal caving hole features presented spheroid were determined, the maximum altitude was 22 m, the maximum width was 7.5 m.