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为了揭示坚硬顶板条件下采动岩体能量分布规律与矿压显现特征,根据某煤矿地质和开采技术条件,采用理论分析和数值模拟方法,对采动岩体的能量场和应力分布进行了研究;根据破碎煤岩体的剩余能量,确定了强矿压显现的临界能量。数值模拟表明:工作面推进距离超过180 m时,工作面超前范围采动岩体能量达到了强矿压的临界能量,具有强矿压显现的危险;工作面超前支承压力影响范围约为40 m,应在该范围加强两巷支护。
In order to reveal the law of energy distribution and the characteristics of mine pressure under the condition of hard roof, according to the geological conditions of a coal mine and the technical conditions of mining, the energy field and stress distribution of the mining rock mass are studied by theoretical analysis and numerical simulation According to the residual energy of the crushed coal and rock mass, the critical energy of the strong pressure is confirmed. The numerical simulation shows that when the working face advancing distance exceeds 180 m, the energy of the rock mass in the lead range of the working face reaches the critical energy of strong rock pressure, which has the danger of strong rock pressure appearing. The influence range of working face advanced support pressure is about 40 m , Should strengthen the two lane support in this area.