煤和瓦斯突出机理的流变假说

Rheological Hypothesis of Coal and Methane Outburst Mechanism

目前煤和瓦斯突出机理的假说,都是在弹性力学基础上建立的,缺少时间因素,难于完满地解释突出的发生发展过程。作者通过对含瓦斯煤样在三维受力状态下流变特性的研究,得出了含瓦斯煤样蠕变行为的数学模型,能够比较好地阐明突出的机理。实验表明,突出煤和非突出煤其流变行为并无本质区别,只要条件具备,各类煤层都有产生突出的可能。含瓦斯煤蠕变方程的导出为建立广义的突出危险综合指标提供了基础。

Since the hypothesis of coal and methane outburst mechanism based on elastic me-chanics gives no consideration to time, it can not give a satisfactory explanation to the out-burst occurrance and its development. A creep mathematical model of coal containing gas has been set up through creep tests and analysis under the condition of triaxial compression.And the model can explain the phenomena of coal and methane outburst successfully. The tests proved that there is no essential difference between the rheological properties of prone outburst coal and non-prone outburst coal. Outburst can take place in any kind of coal if the rheological conditions of coal containing gas are met. The creep mathematical model provides a basis for establishing a comprehensive index of coal and methane outburst possibility.