某铀矿井采场顶板地压监测与对比分析

Monitoring and Comparative Analysis of Roof Stability in a Uranium Mine

某铀矿井开采深度的增加和采矿方法的改变,给采场顶板稳定性带来了新的不确定因素。为了及时掌握深部采矿中,采用不同采矿方法时采场顶板围岩的稳定性,在-150m中段12-4采场布置钻孔应力计、压力计和位移计,分别对巷道围岩和采场顶板的表面位移、顶板压力和应力进行监测。通过对比分析监测数据,掌握了上向矸石充填法和无轨采矿法采场顶板稳定性的变化情况,为矿山的安全生产提供了科学指导。

With the increase of mining depth and stress of surrounding rock in a uranium mine,the roof ground pressure activities are frequent,and the probability of accidents such as roof fall and side slope deviation is increasing.At the same time,the change of mining method also brings new uncertain factors to the stability of stope roof.In order to grasp the stability of the surrounding rock of the stope roof under different mining methods in the deep mining in time,borehole stress gauge,pressure gauge and displacement gauge are arranged in the 12-4 stope in the middle section of-150 m to monitor the surface displacement,roof pressure and stress of the surrounding rock of the roadway and the roof of the stope.Through collecting and sorting out the monitoring data,the roof stability changes of the stope with upward gangue filling method and trackless mining method are compared and analyzed,so as to provide scientific guidance for the safe production of the mine.