煤岩蠕变破裂判定准则及应用

煤岩边坡的大变形不是瞬间发生的，而是长时间缓慢流变的结果，其中蠕变是流变的主要形式，当蠕变进入到了加速发展阶段即蠕变的第三阶段，发生蠕变破裂，会使煤岩体失去承载能力并损坏，甚至发生严重事故。因此，开展煤岩蠕变破裂判据研究尤为必要。应用最大拉应力理论以及最大拉应力单元追踪法，模拟流变变形过程中裂纹的萌生、扩展和汇聚，建立蠕变破裂判断准则；应用FEPG软件平台，编制蠕变破裂模块，从受法向力作用下的蠕变破裂，分析其各设定监测点随时间不同方向位移变化的规律；通过对层状边坡蠕变破裂模拟与海州煤矿监测数据对比可知，两者可以很好的吻合。

Criteria for coal creep rupture and its application

Large coal rock slope deformation is not instantaneous,but rather the result of a long slow rheological,which is the main forms of creep;When creep reached the accelerated stage,the coal rock would cause creep rupture and lose bearing capacity,and serious accidents will occur.Therefore,it is particularly necessary for creep rupture criterion of coal.Applied the maximum tensile stress theory,and the maximum tensile stress element tracking method to simulate the rheological deformation of crack initiation,propagation and aggregation,and established the creep rupture criterion.Based on FEPG platform,drawn up the creep rupture of the module,by the normal force from the effect of creep rupture analysis，got the change law of the monitoring points in different directions displacement with time.Through up the slope of creep rupture simulation and it is in good agreement on site monitoring data Haizhou Coal Mine.