Abstract
It is an important research subject to realize safety and effective mining with the top-coal caving method in complicated geological condition. Based on the bad occurrence conditions and thick dirt band between No.8 and No.9 coal seams of Zhuxianzhuang coal mine in Huaibei mining area, the physical and mechanical properties of dirt band were analyzed, the fracture mechanism of dirt band was studied, caving laws of roof and top coal were summarized, and optimal caving technology of coal was designed and adopted. The results show that the safety and effective mining has been realized in thick seams working face of dirt band, and good economic benefit was achieved. The research results have certain guiding significance and reference value to thick seams mining under similar conditions.
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