Abstract
In order to solve the problems of hard roof caving and overhanging area in 220116 working face of Xinji No.2 Coal Mine, deep-hole pre-splitting blasting overburden technology is adopted to destroy the integrity of roof in advance so as to make it collapse as soon as possible, reduce the apparent strength of rock pressure of initial weighting, and slow down the destructive effect of initial weighting on support. The numerical simulation shows that the first collapse step of the basic roof is obviously reduced after the forced roof caving, which greatly reduces the impact disaster caused by large area roof weighting, is conducive to the stability of the support and roof safety management, and is of great significance to the safety production of the working face.
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