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为深入研究煤与瓦斯突出过程中煤体弹性潜能的产生机制及演化过程,构建突出煤体弹性潜能计算模型,利用正交试验设计法量化分析弹性潜能各影响因素的敏感性,并基于平顶山十矿己_(15)-24080掘进工作面现场实际情况,探讨掘进进尺与煤体弹性潜能的关系。结果表明,突出过程中煤体弹性潜能对支撑压力集中系数、弹性模量、原始有效地应力的敏感性较大,而对煤体内摩擦角、泊松比的敏感性较小;就十矿己_(15)-24080工作面而言,煤体弹性潜能随着掘进进尺的增加呈现先增大后减小的趋势,当掘进进尺达到4.5 m时,弹性潜能达到最大值。
In order to further study the generation mechanism and evolution process of coal elastic potential during the process of coal and gas outburst, construct the computational model of elastic potential of coal outburst, use the orthogonal experimental design method to quantitatively analyze the sensitivity of each factor of elastic potential, Mine (15) -24080 The actual conditions of the working face of the heading face and the relationship between the excavation footage and the elastic potential of the coal body. The results show that the elastic potential of coal body during the salient process is more sensitive to the support pressure concentration coefficient, elastic modulus and original effective stress, but less sensitive to the internal friction angle and Poisson’s ratio. On the other hand, (15) -24080 face, the elastic potential of coal body increases first and then decreases with the increase of excavation footage, and the elastic potential reaches the maximum when the excavation footage reaches 4.5 m.