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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 is uncovered under complex geological conditions, the coal body is apt to collapse and form holes. According to the occurrence of coal seams and the actual mining situation, the numerical simulation method was used to analyze the morphological characteristics of the collapsed holes in soft coal and the site investigation and analysis of the hole shapes were conducted. The maximum height of the collapsible holes in the soft coal was determined to be 22 m, the maximum collapse width is 7.5 m, and at the same time, it is determined that the morphological characteristics of the ellipsoid in the collapse area are determined.