控制参数渐变影响岩石力学系统失稳机制初探

ON INSTABILITY MECHANISM OF ROCK MECHANICS SYSTEM AFFECTED BY GRADUAL CHANGE OF CONTROL PARAMETER

以岩石试件－实验机系统为例，将岩石试件广义刚度系数视为控制变量，分析了控制变量在系统稳定中的作用，指出在受力过程中，广义刚度系数的渐变诱发了系统的突变。文中以煤矿坚硬完整连续顶、底板中煤层的冲击地压为例，指出煤体的综合刚度系数为控制变量，通过人为干预煤体的综合刚度系数，达到防止或减缓冲击地压的目的。

With the illustration of rock samplelaboratory machine system, the generalized stiffness coefficient of rock sample is considered as control parameter and its effect on the system is analysed. It is pointed out that the catastrophic instability of the system is induced by the gradual change of generalized stiffness coefficient during the procedure subjecting to forces. With the illustration of the rockburst in the coal seam where there are hard and successive roof and bottom, the synthetical stiffness coefficient is considered as the control parameter, the rock burst can be prevented or weakened through interfering with the synthetical stiffness coefficient of coal.