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为了解决煤巷掘进工作面煤与瓦斯突出预测(以下简称“突出预测”)的理论计算问题,首先,根据突出事故发生的一般规律和现行的突出预测方法建立了突出预测的物理模型,提出了突出预测的“掩护罩”理论,对瓦斯压力、地应力、煤的力学性质等在突出预测中的作用进行定性分析,提出了瓦斯压力起主要作用的观点;在此基础上,以瓦斯渗流理论为基础,建立了“掩护罩”不失效的临界条件——迎头内瓦斯压力的临界值与几何参数、煤的剪切强度等指标之间的定量关系,包括掘进过程中失效和延时失效两种情况,可以解释延时突出现象;最后,提出了需进一步研究的问题,包括快速获得迎头内瓦斯压力、煤体剪切强度指标的方法,以及非线性渗流偏微分方程线性化处理的误差问题。
In order to solve the theoretical calculation problem of coal and gas outburst prediction in coal heading face (hereinafter referred to as “outburst prediction”), firstly, the physical model of outburst prediction is established according to the general rule of prominent accident and the current outburst forecasting method, Put forward the predictive “cover” theory, qualitative analysis of the role of gas pressure, in-situ stress, mechanical properties of coal in the projection of the prominent, put forward the gas pressure plays a major role in the point of view; On this basis, Based on gas seepage theory, the critical condition of “cover” is established, which is the quantitative relationship between the critical value of head gas pressure in in-position and the geometrical parameters and the shear strength of coal, including during excavation Failure and delayed failure can explain the outstanding phenomenon of delay. Finally, some problems that need to be further studied are put forward, including the method of quickly obtaining the head-on internal gas pressure and the shear strength index of coal, and the nonlinear seepage partial differential equation Linearization of the error problem.