The hard roof stope has the problem of difficult collapse or large step distance,which leads to a series of problems such as severe rock pressure,serious deformation of surrounding rock and high cost and low efficiency repairs.In order to solve these problems,the strategy of"advance implementa-tion and joint treatment"was comprehensively implemented to control the surrounding rock of stope by using the advantages of high safety and high efficiency of the gas phase cutting top pre cracking pressure relief technology.Based on the study of the zone analysis of mining stress in stope,the spe-cific parameters of the gas phase top precracking pressure relief the gas phase cutting top pre cracking pressure relief scheme were designed systematically and successfully applied to the site.In the process of implementation,the good effect of the gas phase cutting top pre cracking pressure relief technology was verified by using high-pressure water injection and monitoring the deformation of surrounding rock.The research results provided valuable experience for mining engineering under similar hard roof conditions.
关键词
坚硬顶板/气相切顶/预裂卸压/高压注水/变形监测
Key words
hard roof/the gas phase cutting top/pre cracking pressure relief/high-pressure water injec-tion/deformation monitoring
维普
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