Study on Laws of Mine Pressure Appearance at Blasting Caving Coal Face of Three Soft Unstable Thick Coal Seam
By the three volume observation, abutment pressure measurement and floor strength test to teaching three mining of SDIC.The research shows that, the old roof cycle pressure and initial pressure strength appeared is weak, the initial pressure step is about 16m , cycle pressure step of main roof is about 8 m .Front abutment pressure maximum value is 13.4 Mpa.Floor average allowable stress is 4.668 Mpa, average allowable stiffness is 0.035Mpa/mm, that is soft floor, according to the pressure test results and calculated the column shoes area.Those for the supporting design of stope and safety production provide the theory basis.
Three volume observation initial pressure of main roof cycle pressure of main roof abutment pressure floor strength.
Sun Guangzhong Jing Yongbin Guo Junjie Wang Guoji
Department of Safety Science&Engineering,Henan Institute of Engineering,Zhengzhou,451191,China)
国际会议
the 4th International Symposium on Mine Safety (2012) 第四届国际矿山安全学术研讨会(2012)
阜新
英文
511-514
2012-08-04（万方平台首次上网日期，不代表论文的发表时间）