瓦斯对煤的力学性质及力学响应影响的试验研究

The Experimental Research on the Effect of Gas on Mechanical Properties and Mechanical Response of Coal

本文通过不同围压、不同孔隙瓦斯压力下煤的三轴压缩试验结果，阐述了瓦斯对媒体的力学变形性质及力学响应的影响。试验结果证明了含瓦斯煤的变形、破坏及力学响应同时受到游离和吸附两种状态瓦斯的影响。一是瓦斯压力作为体积力的力学作用，另一为瓦斯的吸附和解析对煤体产生的非力学作用。因此在研究煤和瓦斯突出的发生机理及采动影响下煤层中瓦斯流动问题时必须考虑瓦斯的力学和非力学作用对煤的力学性质和本构关系的影响。

In this paper,triaxial compression tests are carried Out with various confining pressure and pore pressure.The results proved that the mechanical properties and mechanical response of gas-absorbent coal are influenced bothby absorbed gas and free gas. One of the influence is the mechanical effect of gas prereure as body force,and theother is the non-mechanical effect of absorption and deserption of gas.Therefore,in the study of the mechanismof out bursts and gas flowing in mined coal seams,both the mechanical and non-mechanical effects of gas on themechanical response must be considered.