Rock burst induced by roof breakage and its prevention  

作　　者：何江 窦林名 曹安业 巩思园 吕建为 

机构地区：[1]State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology [2]School of Mines,China University of Mining and Technology

出　　处：《Journal of Central South University》2012年第4期1086-1091,共6页中南大学学报（英文版）

基　　金：Project(2010CB226805) supported by the National Basic Research Program of China;Projects(30370412,30670558) supported by the National Natural Science Foundation of China;Project(SKLCRSM10X05) supported by the Self-research Program of the Key Laboratory of Coal Resources and Safe Mining,China

摘　　要：Based on the research on rock burst phenomenon induced by the breakage of thick and hard roof around roadways and working faces in coal mines, a criterion of rock burst induced by roof breakage （RBRB） was proposed and the model was built. Through the model, a method calculating the varied stresses induced by roof breakage in support objects and coal body was proposed and a unified formula was derived for the calculation of stress increment on support objects and coal body under different breaking forms of roof. Whilst the formula for calculating dynamic load was derived by introducing dynamic index Kd. The formula was verified in Huating Mine by stress measurement. According to the formula for stress increment calculating, the sensitivities of dynamic load parameters were further studied. The results show that the thickness and breaking depth of roof, width of support objeet are the sensitive factors. Based on the discussion of the model, six associated effective methods for rock burst prevention are obtained.Based on the research on rock burst phenomenon induced by the breakage of thick and hard roof around roadways and working faces in coal mines,a criterion of rock burst induced by roof breakage(RBRB) was proposed and the model was built.Through the model.a method calculating the varied stresses induced by roof breakage in support objects and coal body was proposed and a unified formula was derived for the calculation of stress increment on support objects and coal body under different breaking forms of roof.Whilst the formula for calculating dynamic load was derived by introducing dynamic index Kd.The formula was verified in Huating Mine by stress measurement.According to the formula for stress increment calculating,the sensitivities of dynamic load parameters were further studied.The results show that the thickness and breaking depth of roof,width of support object are the sensitive factors.Based on the discussion of the model,six associated effective methods for rock burst prevention are obtained.

关 键 词：roof breakage dynamic load stress increment rock burst mining engineering 

分 类 号：TD235.41[矿业工程—矿井建设]