Research on Optimization of Roof Control Parameters in Caving Top Coal Mining
Aiming at the problems of roof management of top coal caving process and low recovery rate of a mine,through analyzing the roof management of roadway and crushing roof as well as the reasons for low recovery rate,the optimization design of coal mining process is proposed,specifically optimizing the size of coal caving step and the size of stop-draw ratio,and the practical application is carried out.The results show that when the coal caving step is set to 1.13 m and the stop-draw ratio is set to 1.08.After using the coal drawing process of one mining and one drawing,the recovery rate of the working face reaches 92.1%,ensuring the efficient mining of coal resources.
caving top coal miningcoal drawing steprecovery rateroof management
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