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中文摘要：
考虑到气体的封存条件,含瓦斯煤体力学指标的测定一般都是在伪三轴的情况下进行的。但根据国家标准,煤岩力学指标的测定多是对原煤标准试样进行单轴实验取得的。利用瓦斯气体密封装置,提出了测定瓦斯煤体力学指标的类单轴实验方法。通过实验研究,得到了有效围压为零条件下瓦斯对煤样力学性质和力学响应的影响规律。实验结果表明,孔隙瓦斯改变了煤体全部变形阶段的力学响应特性,而煤体力学性质和响应的变化趋势随瓦斯压力的升高而逐渐减弱,即随瓦斯压力的升高,吸附瓦斯所引起的非力学作用将逐渐占据主导地位。
英文摘要：
Considering the seal and storage of gas,mechanical index of coal containing gas is usually obtained by normal three-axis experiment.While,according to national standard,mechanical index of coal is usually tested by uniaxial experiment.By utilizing the gas sealing system,an analogic uniaxial experiment method is proposed.Through designed experiments,the effect of gas on mechanical properties and mechanical response of the coal sample when effective confirming pressure is 0 is studied too.The experimental results show that pore gas changes the mechanical response of complete deformation stage,but the trend of change gradually weakens as the gas pressure increases,and it means that non-mechanical effects caused by absorbed gas play a leading role gradually.
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