In view of the engineering problem whereby the main roof fracture of deep coal seam still induces frequent rockburst after soft direct roof buffering, a UDEC numerical model was established based on the actual geological conditions of a mine, and the influences of the length of hanging roof and periodic weighting step on the stress in front of coal wall were discussed. The dangerous area at most risk of rockburst in the working face was monitored by using core-drilling, the risk of a rockburst was predicted by classification, and countermeasures were taken against all levels of rockburst. The results show that the longer the hanging roof length, the higher the stress in front of coal body; However, when the coal body changes from an elastic state of stress to a plastic state of stress, the stress will suddenly decrease, the range of variation of stress under static load is larger than that under dynamic load, which indicates that shock wave attenuates the stress in front of the coal body. The larger the periodic weighting step distance, the higher the stress in front of coal body, and the greater the increase of stress. However, compared with the attenuation effect of dynamic load, when increasing the hanging roof distance, the attenuation effect of dynamic load under the condition of increasing the periodic weighting step distance is greater. Dynamic load or static load will increase the stress in front of coal wall, which will lead to a rockburst. The techniques of large-diameter borehole pressure relief, coal seam water injection, and pressure relief blasting can be used to control the high-stress area monitored, ensuring the safe mining of the working face, so that coal resources can be extracted efficiently, and the rate of utilization of coal resources can be improved.

针对深层煤层的顶板裂缝在软性直接顶板缓冲后仍引起频繁的岩爆的工程问题，根据矿山的实际地质情况，以及顶板长度的影响，建立了UDEC数值模型。讨论了煤壁前应力的周期性加权步骤。通过岩心钻探监测工作面中最易发生爆炸危险的危险区域，通过分类预测爆炸危险，并针对所有级别的爆炸危险采取对策。结果表明，吊顶长度越长，煤体前部应力越大；但是，当煤体从弹性应力状态转变为塑性应力状态时，应力会突然降低，静载荷作用下的应力变化范围大于动载荷作用下的应力变化范围，表明冲击波减弱了煤体前部的应力。周期性加权步距越大，煤体前部应力越大，应力增加越大。但是，与动载荷的衰减作用相比，当增加吊顶距离时，在增加周期性加权步距的情况下，动载荷的衰减作用更大。动载荷或静载荷都会增加煤壁前部的应力，从而导致岩爆。大直径钻孔卸压，煤层注水和卸压爆破技术可用于控制所监测的高应力区域，从而确保工作面的安全开采，