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基于D值理论,考虑矿山工程实际情况,引入微震事件概率因子、监测区域重要性因子和台网布设可行性因子重新构建了台网优化目标函数.以某磷矿顶板突水的微震监测为例,对全矿区按照监测区域重要性、台网布设可行性等因素进行分区,采用专家权重法分别给出了相关因子的参考值.按照影响因子取值差异将整个监测区域再次分区,给出了分区后目标函数的积分形式,其中各监测区域控制点坐标即为相应的积分上下限.基于文中提出的微震监测网络的动态优化设计原则,最终给出了该磷矿微震监测台网布设方案.爆破试验表明,本文提出的台网布设方案具有一定的合理性和准确性,三个坐标方向的平均定位误差为6.74 m,最大为10.05 m,空间定位误差为12.51 m,定位精度可满足工程监测需要.
Based on the D value theory, considering the actual conditions of the mine project, the objective function of network optimization was reconstructed by introducing the probability factor of microseismic event, the importance factor of monitoring area and the feasibility of network deployment. , The whole mining area is divided according to factors such as the importance of the monitoring area and the feasibility of network deployment, and the reference values of the relevant factors are respectively given by the expert weight method. The monitoring area is subdivided according to the difference of the influencing factors, The integral form of the objective function after partitioning, in which the coordinates of the control points in each monitoring area are corresponding upper and lower integral points.Based on the dynamic optimization design principle of the microseismic monitoring network proposed in the paper, the layout scheme of microseismic monitoring network of the phosphate mine is finally given. The blasting test shows that the proposed network layout scheme has some rationality and accuracy. The average positioning error in the three coordinate directions is 6.74 m, the maximum is 10.05 m and the space positioning error is 12.51 m. The positioning accuracy can meet the requirements of engineering monitoring need.