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Abstract Based on 1301 working face of Jingfang coal industry under the influence of abandoned roadway, as well as fracture mechanism and caving ability of top coal, effects of coal caving and top coal were researched in different ways. Top coal caving characteristics in 1301 working face was firstly analyzed through mathematical method, which proposed a new way of coal caving. Then coal caving was used in old coal mining influence area, and determined its rationality and practicability.
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