坚硬顶板工作面临近采空区强矿压显现机理研究

Research on the Mechanism of Strong Mine Pressure near Gob Area in Hard Roof Face

为了研究坚硬顶板工作面临近采空区影响下的强矿压显现机理,以同家梁矿为例,采用理论分析和UDEC数值模拟方法,研究采空区侧向悬顶下的围岩应力分布特征。结果表明:在区段煤柱采空侧形成约30m长的侧向悬臂,形成5.01MPa的叠加应力;采空区侧向支承压力的影响范围达到80m,临空巷道处于侧向支承压力升高区内。强矿压显现是坚硬顶板悬顶和临近采空区覆岩运动共同作用的结果。

In order to study the mechanism of strong pressure on the hard roof under the influence of near goaf, Tongjialiang Mine is taken as an example to study the stress distribution characteristics of surrounding rock under the lateral cantilevered roof under theoretical canopy and UDEC numerical simulation. The results show that a lateral cantilever of about 30m long is formed on the gob side of the section coal pillar and a superimposed stress of 5.01MPa is formed. The infuence range of lateral supporting pressure of the goaf reaches 80m. The laneway is in the rise area of lateral support pressure. Strong rock pressure is the result of the interaction between overhanging strata of hard roof and adjacent goaf.