煤与瓦斯突出阵面的推进过程及力学条件分析

本文用数学解析方法解出了石门揭煤条件下工作面前方含瓦斯煤体内的稳态应力场和动态应力场。对突出阵面推进过程中任一煤体质点所经历的不同阶段内起主要作用的因素进行了研究，结合煤样的破裂特性用断裂力学的方法分析了突出的发生与发展过程，提出了煤与瓦斯突出机理的球壳失稳假说并给出了突出发生的力学条件。并在突出模拟试验中进行了初步的验证。

Analyses on the Developing Process and Mechanical Conditions of Coal Gas Outburst Front

In this paper, the static stress field and dynamic stress field in gas--bearing coalseam under the condition of disclosing coal seam in a cross--cut are derived with mathematic analysis.All factors that play a major role at each stage in the course of coalgas outburst are studied,and the starting and developing courses of outburst are analyzed by means of fracture mechanics.In the end,the hypothesis on loss of spherical shell stability about coal gas outburst mechanism is proposed,and the mechanical conditions underwhich a coal gas outburst would happen are also presented some conclusions have also been verified by outburst model experiments.