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为了研究深井硬岩巷道岩爆发生的机理,结合大台井玄武岩区岩爆工程实践,分析了区域构造应力场特征,研究了区域内煤岩体的弹性潜能分布特征。从构造应力和能量的角度出发,分析了具有岩爆倾向性的巷道围岩产生岩爆时应具备的应力条件和能量条件。研究结果表明,在具有岩爆倾向性的岩体中掘进巷道,岩爆的产生应同时具备所需的应力条件和能量条件,岩爆的位置和剧烈程度与最大主应力方向有关。研究成果将对大台井岩爆防治,深部开采的水平大巷布置和巷道支护等提供理论依据。
In order to study the mechanism of rockburst in deep mine hard rock roadway, combining with the practice of rock burst in Datai well basalt area, the characteristics of regional tectonic stress field were analyzed and the elastic potential distribution characteristics of coal and rock mass in the area were studied. From the point of view of tectonic stress and energy, the stress conditions and energy conditions that should be possessed by rockburst during the rockburst of surrounding rock with rockburst are analyzed. The results show that the rockburst should have the necessary stress and energy conditions for tunneling in rock mass with rock burst tendency. The location and intensity of rock burst are related to the direction of maximum principal stress. The research results will provide theoretical basis for prevention and control of Daitai rock burst, layout of horizontal lanes in deep mining and roadway support.