深部含瓦斯煤内时本构方程体积响应

通过深部含瓦斯煤的体积响应特性分析，将体积响应分为纯体积响应和滴体积响应，得到了本构方程的显式。纯体积响应是在只有静水压力作用下体积应变所对应的有效体积应力：偏体积响应是由于偏应力的存在体积应变所对应的体积应力对纯体积响应的修正。根据实验结果确定了方程中的各材料参数。根据内时塑性理论所得到的含瓦斯煤的本构方程反映了材料微元的内部特性，更加符合瓦斯煤层的实际情况。含瓦斯煤内时本构方程体积响应的修正公式，考虑到了偏体积响应曲线的连续性和光滑性，更加符合试验结果。

Volume-specialty of end chronic constitutive equations in deep gas-adsorbent coal

By the analysis of the volume-specialty for the deep gas-absorbent coal, the volume-specialty was divided to pure-volume-specialty and off-volume-specialty, and the expressions of the endochronic constitutive equations were obtained in this paper. The pure-volume-specialty is an expression of effective volume-stress and volume-strain under hydrostatic pressure only. The off-volume-specialty is some modifications to the pure-volume-specialty when the off-stress exist. The material parameters can be determined by experiment. The endochronic constitutive equations of coal are affected by gas express interior behaviors of material element, and it is consonant with practicality. Because continuity and smooth of curve of off-volume-stress and volume-strain were taken into account, the modificatory expressions are consonant with the testing result.