煤与瓦斯突出动态损伤演化过程研究

The Dynamic Evolution Procession on Coal and Gas Burst

煤与瓦斯突出现象中力学现象表现的相当复杂。本文首先从岩石的强度与损伤耗能率关系出发,对岩石强度进行了定性分析。然后将煤与瓦斯突出的发生过程划分为准备、发动、发展和停止4个阶段,在此基础上分析了瓦斯和地应力在煤与瓦斯突出中的作用,说明煤的突出压出和煤的突然倾出的主要动力源均为瓦斯压力,从而对煤岩灾变现象中的突出机理作新的解释和定性分析。

There are quite complex physical natures in the coal and gas burst.In this article,from the relationship between the intensity of rock and the energy ratio of damage dissipation,the rock intensity were qualitative analyzed.And then based on ingredient damage theory,the mechanisms of coal and gas burst was investigated by integrating the ingredient physical natures including rheology,crustal stress,gas press,and other factors,At last a conclusion was drawn that internal gas pressure gradient from coal wall is the main power source of burst,crustal stress is only a minor factor.