【摘要】 采用三轴岩石力学测试系统来模拟煤岩的力学行为 ,通过控制有效应力的方式进行实验 ,测试煤基质收缩量。实验结果分析表明 ,煤基质收缩量与其力学参数 (抗压强度 ,弹性模量 )具有良好的负指数关系 :y=ae- bx。吸附阶段 ,力学性能较强的煤样 ,其基质膨胀效应较小 ,而力学性能较弱的煤样 ,其基质膨胀效应就会较明显 ;解吸阶段也具有类似的情形 ,这种正反效应的叠加 ,使得强者更强 ,弱者更弱 ,导致力学性能较高的煤岩 ,其基质的收缩量反而越小更多还原

【Abstract】 The original mechanical properties were analysed using the tri axial rock mechanics testing system. Coal matrix shrinkage was measured by controlling the effective stress. Based on experiments on tri axial mechanics and coal matrix shrinkage, the internality controlling factors of coal matrix shrinkage were discussed. The results proved that coal matrix shrinkage tend to become low with the rise of the coal mechanical properties: y=a e -bx . During the adsorption, the adsorption effect of coal matrix with higher mechanical properties is low. However, the adsorption effect of coal matrix with lower mechanical properties is high. The shrinkage effect in the course of desorption is similar to the adsorption effect in the course of adsorption. The coal matrix shrinkage effect represented the above coupling mechanism under the control of the two opposite superposition course.更多还原