关键词: 综采工作面, 大坡度, 采区下山, 围岩支护, 工作面回撤

Abstract: The average slope of the stoping position in 21015 coal mining face of Chen silou Coal Mine is 24o and the maximum is 30o. Due to geological constraints, in order to ensure the safe and efficient withdrawal of coal mining face equipment, it is necessary to use the downhill withdrawal method. On the basis of considering the actual conditions of the working face and the technology of withdrawal, the method of optimizing the ending technology, setting the winch of retaining frame, and adjusting the construction process method of the support withdrawal is adopted. It realizes the safe withdrawal of the equipment in the working face under the condition of the large slope, solves the problems in the withdrawal process, and provides a new method for the withdrawal of the equipment in the working face under the condition of downhill.