采矿与安全工程学报Issue(6)：841-847,7.
岩-煤-岩组合体破坏特征及冲击倾向性试验研究
Experimental research on failure characteristics and bursting liability of rock-coal-rock sample
摘要
Abstract
In order to determine the bursting danger of mining zone, and to solve the limitation of coal and rock's bursting liability evaluation criterion, the stiffness values of coal’s post-peak and rock’s un-loading process are used to evaluate the steady and unsteady failure of rock-coal-rock sample based on the analysis of deformation, acceleration, stiffness and energy variation. The research results indicate that rock-coal-rock sample’s failure state is determined by the contrast relation of coal’s post-peak stiff-ness and rock’s stiffness. There is a point S on the coal’s stress-strain curve during the unloading process where the stiffness changing ratio satisfies the relation of λ′>kkmk ku , after which the 212+&&/[(12) ]&rock-coal-rock sample’s shall not keep the balance state, and the sample's failure will convert from sta-ble to instable state. The parameter α which is the ratio of the energy that roof and floor releases to that of coal releases is used as the index of bursting liability of rock-coal-rock sample. The results of seven sites’ samples from 2 mines indicate that there are 2 samples’ bursting liability is under the influence of roof and floor attribution. The model of rock-coal-rock sample can reflect the bursting liability of in-situ surrounding rock more accurately than that of only coal.关键词
冲击矿压/冲击倾向性/岩-煤-岩组合体/失稳破坏判别Key words
rock burst/bursting liability/rock-coal-rock sample/instable failure criterion分类
矿业与冶金引用本文复制引用
牟宗龙,王浩,彭蓬,刘振江,杨晓晨..岩-煤-岩组合体破坏特征及冲击倾向性试验研究[J].采矿与安全工程学报,2013,(6):841-847,7.基金项目
国家“十二五”科技支撑计划项目(2012BAK09B01)；国家自然科学基金项目(51104150)；中国博士后科学基金项目(201104609) （2012BAK09B01）
