Abstract:

Accidents of hanging wall rock collapse,caving,sinking spalling and roof-fall which caused by unstable wall rock frequently occur in mining process of Hubazhuang gold mine.This also increases loss rate and dilution rate.We formulate a shallow hole mining method of plate removed on the hanging wall fracture zone and layered culling and follow -up recovery on the footwall ore.This method effectively solves the potential danger of surrounding rock instability,improves the mining efficiency,reduces the dilution rate and loss rate,gains better economic benefits and social benefits,it could be applied in the similar mine.

Key words: Broken orebody, Wall rock, Blasting, Recovery mining technology, Loss rate, Dilution rate, Hubazhuang gold mine, Shandong Province