Optimization and Practice on Advanced Pre-splitting Scheme for Fault Broken Zone

Aiming at the difficult problems of severe pick loss, large difficulty in rock-breaking, low stoping efficiency and others during the period of stoping passing through faults, taking the 31130 coal mining working face stoping passing through the F₃ fault of Xiezhuang Coal Mine as the research object. The advanced pre-splitting stoping process is adopted, through joint technical schemes such as "exposing fault research map+optimizing blasthole layout+endoscope observation", etc, precise "what is cut is what is blasted" is achieved. The application effect shows that after adopting the advanced pre-splitting technology, the stoping efficiency is improved by 67%, the pick loss of the shearer is reduced by 75%, and the large-scale roof fragmentation and roof collapse are avoided.