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本文介绍了对龙凤矿冲击地压研究方面所取得的主要成果。首先论述了冲击地压的成因条件、发生过程和一般规律。根据现场和实验室试验、理论分析,对以钻屑法为主的一套预测方法和以压力注水为主的一套防治措施进行了比较全面的研究。根据煤在强度极限后具有应变软化性质,建立了钻屑量和煤体应力的计算式;确定出检测冲击地压危险的各项指标并在生产中应用。对煤在不同水压下的饱水参数和物理力学性质的变化规律采用了专用设备进行了研究。用数值方法分析了压力水在煤体中的分布规律,以及注水和卸压爆破前后的应力变化。最后确定了压力注水和卸压爆破的有关参数。本文提出的防治冲击地压的一系列方法,不仅在龙凤矿得到应用,而且对其它类似矿井也颇有参考价值。
This paper introduces the main achievements made in the research on the impact pressure of the dragon and phoenix mine. First of all, the causes of rock burst, the occurrence process and the general rule are discussed. According to field and laboratory tests, theoretical analysis, a set of prediction methods mainly based on drill cuttings method and a set of prevention and control measures based on pressure water injection were comparatively studied. According to the strain softening property of coal after the strength limit, a formula for calculating the amount of drill cuttings and the stress of coal mass is established. Various indexes for testing the risk of rock burst are determined and applied in production. Special equipment was used to study the variation law of the saturated water parameters and the physical and mechanical properties of coal under different water pressures. The distribution of pressure water in coal and the change of stress before and after water injection and pressure relief blasting are analyzed numerically. Finally, the parameters of pressure water injection and pressure relief blasting are determined. This paper puts forward a series of methods to prevent rockburst, not only applied in Longfeng Mine, but also has other reference values for other similar mines.