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针对两软煤层的地质条件,建立了两软煤层冲击地压发生的力学模型。通过对模型的力学分析与现场实践,得出了深部两软煤层条件下冲击地压发生的主要原因,是受上部力源层和下部稳定层夹持下的软弱冲击层出现应力集中和能量积聚,采动活动诱发积聚的能量向破碎缓和区突然释放,造成煤岩块瞬时喷出,形成冲击地压。从深部两软煤层冲击地压发生的应力条件、能量条件、物质条件和冲击地压诱发因素等方面进行分析研究,制定了转移应力、保持护巷煤柱稳定性、巷帮加固、松动帮部、形成顶板支护体阻挡结构的冲击地压防治措施,并进行了现场实践,实现了工作面安全高效无冲击开采。
According to the geological conditions of two soft coal seams, the mechanical model of rockburst in two soft seams is established. Through the mechanical analysis and field practice of the model, the main reason for the rockburst occurred under the conditions of deep and soft coal seams is that stress concentration and energy accumulation occur in the soft impact layer under the upper and lower stabilizing layers , The energy evoked by the mining activity suddenly released to the crushing and relaxing zone, causing the coal rock block to be sprayed instantaneously to form the rock burst pressure. The stress and energy conditions, material conditions and the causative factors of rockburst are studied from the aspects of rockburst in two deep soft coal seams, and the transfer stress is established to maintain the stability of coal pillar, the reinforcement of the roadway, , The formation of roof support body blocking structure of the impact of prevention and control measures, and carried out on-site practice to achieve safe and efficient mining face without impact.