FLAC^(3D)在地下矿山采场稳定性分析中的应用

Application of FLAC^(3D) in Stability Analysis of Underground Mine Stope

稳定的采场是地下矿山安全开采的前提,数值模拟是地下岩体稳定性分析研究的有效方法之一。为开展地下矿山采场稳定性分析研究,以云南某矿为对象,采用FLAC^(3D)软件对自然条件下和锚杆支护条件下采场的极限暴露面积分别进行了数值模拟研究。研究结果表明:自然条件下采场的极限暴露面积为400m^(2),采用锚杆支护后,能够有效减小采场顶板压力,控制顶板位移变形和岩体冒落,并使采场的极限暴露面积增大至600m^(2)。说明锚杆支护作为顶板稳定性控制措施是切实可行的,也能够保证采场的安全稳定。

Stable stope is the premise of safe mining in underground mines,and numerical simulation is one of the effective methods to analyze and study the stability of underground rock mass.In order to carry out the stability analysis and research of underground mine stope,taking a mine in Yunnan as an object,FLAC^(3D)software was used to carry out numerical simulation research on the limit exposed area of stope under natural conditions and under the condition of bolt support.The research results show that the limit exposed area of the stope is 400m^(2) under natural conditions,and the use of bolt support can effectively reduce the roof pressure,control the displacement and deformation of the roof and rock caving,and increase the limit exposed area of the stope to 600m^(2).It shows that the bolt support is feasible as the roof stability control measure and can guarantee the safety and stability of stope.