应力扰动监测系统的研发及在马鞍山矿的应用

为进一步提高和改进基于温度补偿的空心包体应变计应力监测系统的实用性能,检验其在边坡工程能否实现长期监测的应用效力,2017年4月于安徽东部马鞍山市南山矿凹山露天采场安装了应力监测系统。在1个月的监测中,在受到气候影响和坡顶废渣倾倒的影响之下,应力变化仍然基本稳定。温度通道显示一天中气温数据波动但整体温度呈明显上升趋势,各通道经温度补偿后,轴向应力基本保持不变,环向应力变化约为1.09MPa至2.53MPa,与施工情况一致。2018年10月底在2017年测点处对监测系统修缮后进行二次测量,得到约为4.52MPa至8.11MPa的环向应力,以及10.40MPa至11.55MPa的轴向应力,与施工情况及理论值预期范围吻合。该系统实现长期无人值守监测所采用的传输方式为无线数传电台转换并传输无线信号,这套传输系统能实现中远距离信号传输并在基站读取及存储监测数据。

Research and development of stress disturbance monitoring system and its application in Maanshan Mine

In order to further improve the practical performance of the temperature compensation-based hollow inclusion strain cell monitoring system, and to test its application effectiveness in the long-term monitoring of slope engineering, a stress monitoring system was installed in the open pit of the Nanshan Mine in Maanshan City, eastern Anhui Province in April 2017.In the one-month monitoring, the stress changes were still basically stable under the influence of the climate impact and the dumping of the top waste.The temperature channel shows that the temperature data fluctuates but the overall temperature shows a significant upward trend. After the temperature compensation of each channel, the axial stress remains basically unchanged in the day. The hoop stress change is about 1.09MPa to 2.53MPa, which is consistent with the construction. At the end of October 2018, the monitoring system was re-measured at the measuring point last year, and we obtained the hoop stress of about 4.52MPa to 8.11MPa and the axial stress of 10.40MPa to 11.55MPa which is consistent with the construction situation and the expected range of theoretical values. The transmission mode adopted by the system for long-term unattended monitoring is to convert and transmit wireless signals through wireless digital radio stations.This transmission system can meet the transmission of medium and long distance signals and we can read and store data at the base station..