Caving Hole Features Analysis of Soft Coal Body

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 simulation 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.