坚硬顶板条件下采动岩体能量分布规律与矿压显现特征  

Distribution Laws of Energy Distribution and Characteristics of Strata Behaviors in Hard Roof

作　　者：孔维锋 KONG Weifeng(Yunnan Institute of Indnstrid Technology,Qujing 655000,China)

机构地区：[1]云南工业技师学院,云南曲靖655000

出　　处：《煤矿安全》2017年第9期194-196,200,共4页Safety in Coal Mines

摘　　要：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 laws of energy distribution and characteristics of rock pressure of hard rock under the condition of hard roof, according to the geological condition and mining technology condition of a coal mine, the energy field and stress distri- bution of mining rock body are studied by theoretical analysis and numerical simulation method. Based on the residual energy of broken coal and rock mass, the critical energy of strong rock pressure is determined. The numerical simulation shows that when the working face advancement distance exceeds 180 m, the energy of the mining face reaches the critical energy of the strong rock pressure, which has the danger of strong mine pressure. The influence range of the advanced bearing pressure is about 40 m. Two-lane support should be strengthened in this area.

关 键 词：坚硬顶板 剩余能量 采动能量场 矿压显现 采动应力场 

分 类 号：TD323[矿业工程—矿井建设]