工程温度下煤岩单轴力学特性研究及分析

Study and Analysis of Uniaxial Mechanics Property of Coal Rock Under Engineering Temperature Condition

利用自主研发的深部温度-压力耦合气体运移实验系统,对四川芙蓉白胶煤矿的煤样进行不同工程温度(20、25、30、35、40℃)下的单轴压缩试验,研究工程温度对深部煤岩物理力学性质的影响规律。结果发现,煤岩的单轴抗压强度和弹性模量随着温度的升高而降低,且温度越高力学参数下降梯度越大。根据不同温度下恒温阶段瓦斯逸出量变化趋势认为吸附瓦斯的解吸运移对影响煤岩力学性质有很重要的作用。

Using self-developed temperature-pressure（T-P） coupling gas migration experiment system,we carry out uniaxial compression experiment for coal samples from Sichuan Furong Baijiao Coal Mine under different engineering temperature（20 ℃,25℃,30 ℃,35 ℃ and 40 ℃） to study the influence laws of temperature on the physical and mechanical properties of deep coal rock.The results show that the uniaxial compressive strength and elastic modulus decreases with the increase of temperature; the higher the temperature,the greater the falling gradient of mechanical parameters. According to the variation trend of gas escape amount in constant temperature stage under different temperature,we think that the desorption migration of adsorption gas has very important role to affect the coal rock mechanics properties.