CHINA MINE ENGINEERING

Pre-conditioning by hydraulic fracturing is an important auxiliary caving technology in the production process of block caving mine, which plays a vital role in improving rock cavability. Relying on the application research project of preconditioning by hydraulic fracturing at the start mining area of 410m level in Tongkuangyu Copper Mine, the technology and related equipment of pre-conditioning by hydraulic fracturing in block caving mine were formed and successfully used in advancing caving rate and decreasing oversize rate. Some new study thoughts are given to promote hydraulic fracturing pre-conditioning technology.