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煤岩与其他普通岩石的力学性能明显不同.为了描述煤岩体压裂岩体突变形成裂缝以及裂缝的扩展问题,基于突变理论定义了损伤变量,并建立了岩体突变过程的能量释放计算模型.基于能量守恒原理,建立了突变后微裂缝扩展的能量方程.通过对黑龙江省鸡西煤矿张晨矿区西三采区3#层右六巷区块煤样在不同压裂阶段缝内流体净压力和微裂缝扩展规律的观察分析,得到由于岩体物性参数不同,微裂缝开始破裂的时间不同,为后续裂缝演化内在混沌特征的研究提供了依据.
The mechanical properties of coal rock are obviously different from those of other common rocks.In order to describe the sudden formation and expansion of fractured rock in coal and rock mass, the damage variable is defined based on the catastrophe theory and the energy release calculation model of the rock mass sudden change process is established Based on the principle of energy conservation, the energy equation of the microcrack propagation after the mutation was established.Based on the analysis of the net pressure of the fluid in the fractures of the right 6th block of No.3 section in the third mining area of Zhangchen mining area, Jixi coal mine, Heilongjiang province And the microcrack propagation law is observed and analyzed. It is obtained that different microcracks begin to rupture due to different physical parameters of rock mass, which provides a basis for the research on the chaotic characteristics of subsequent fracture evolution.