金川二矿区大范围地压监测方案及初步成果分析

Wide Range of Pressure Monitoring Scheme and Preliminary Analysis in Jinchan No.2 Mine Area

金川二矿区为我国特大型地下矿山,采用机械化盘区下向进路胶结充填采矿。二矿区连续开采面积大、年出矿量大,加上矿山工程地质条件较差,地应力大等原因,使得地压问题突出。详细介绍了二矿区大范围地压监测的基本方案、测点布置方式及其典型的测点布置图、采用的监测方法和仪器设备等;在针对围岩体应力、位移等现有监测数据的基础上,初步分析了个监测点的数据变化与发展趋势,针对二矿区大面积开采和水平矿柱开采过程中对14行回风井、大范围上下盘围岩体的影响进行了分析与初步评价,并得到了一些对安全生产有指导和参考价值的初步结果。

Jinchuan No. 2 mine area is an extra large underground mine in China. The underhand drift cemented cut and fill stoping with mechanized panel is adopted. The Jinchuan No. 2 mine has large continuous exploit area and large an- nual output of ore. Additively, due to the relatively poor engineering geological conditions,large stress and other reasons, the ground pressure problem becomes more serious. This paper introduces the basic pressure monitoring program in No. 2 Mine Area, the arrangement of the measuring point and its typical layout, monitoring methods and equipment etc. ; Based on the existing monitoring data of rock mass stress and displacement, the data varies and its trends of the monitoring points are ana- lyzed preliminarily. During the exploitation process of large mining area and level pillars, the influence to the rocks at Line No. 14 air shaft and wide range of upper and lower panel are analyzed and evaluated, obtaining some achievements which play some guidance and reference value in safety production.