DREDGING TECHNOLOGY OF PRESSURE WITH DEEP-HOLE INTERVAL BLASTING BASED ON THEORY OF ROCK BURST START-UP
PAN Junfeng1,2,NING Yu3,QIN Zihan1,2,WANG Shuwen1,2,XIA Yongxue1,2
(1. Coal Mining and Designing Department,Tiandi Science and Technology Co. Ltd.,Beijing 100013,China;
2. Coal Mining and Designing Branch,China Coal Research Institute,Beijing 100013,China;
3. China Coal Technology and Engineering Group,Beijing 100013,China)
Abstract:By analyzing the mechanism of rock burst start-up,the blasting effect of the concentrated stress distribution in the roadway is studied by numerical simulation methods;and the dredging method of pressure with deep-hole interval blasting based on theory of rock burst start-up is proposed. The research results show that:(1) The interval of deep-hole blasting in roadway should be the area of rock burst start-up,otherwise it will play a negative role. (2) It is limited to dredge and debase concentrated stress by increasing intension of roadway support. (3) On one hand,the dredging method of pressure with deep-hole interval blasting can dredge and debase the degree of concentrated stress or energy of the area of rock burst start-up,thus the rock burst start-up step can be prevented. On other hand,it let the area of rock burst start-up firstly move to the deep coal wall;and the total energy which is consumed by rock burst start-up in dredging pressure area increases,but the energy release speed reduces. The good effect of application the research results to field engineering is got.
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PAN Junfeng1,2,NING Yu3,QIN Zihan1,2,WANG Shuwen1,2,XIA Yongxue1,2. DREDGING TECHNOLOGY OF PRESSURE WITH DEEP-HOLE INTERVAL BLASTING BASED ON THEORY OF ROCK BURST START-UP. , 2012, 31(7): 1414-1421.
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