Overview

With the development of the mining industry, the mining area is getting larger and larger, the mining depth is getting deeper and deeper, and the automatic monitoring of the displacement of the rock and soil around the pit will be getting higher and higher. In addition, the soil slippage and collapse accidents have occurred frequently in recent years, so the necessity of monitoring can be imagined! This is also a necessary condition for the safety norms of mining enterprises.
The automatic safety monitoring of rock and soil can effectively monitor the stress deformation of rock and soil around the mine, reasonably arrange the sensor burial scheme according to the stress size, collect regularly, watch, sort out and analyze the data in time, and make corresponding countermeasures through the analysis of data and statements, so as to predict the risks in advance and reduce the accident rate.

Monitoring content

According to the geotechnical characteristics and environmental structure of the mine and slope, different monitoring contents are selected, such as vertical and lateral pressure of soil, deep horizontal displacement of soil, surface displacement settlement, rock mass crack, seepage pressure, internal stress and other automatic monitoring contents, and there are dump, tailings pond, pit fault and internal formwork of well workers and mines in the region.

Equipment used: vibrating wire reinforcement meter, vibrating wire earth pressure meter, vibrating wire concrete strain gauge, 32-channel automatic acquisition instrument, 12v external battery.

Project Background

This is a mine with a depth of 400 meters. The mining work has been completed and the roadway will be backfilled. Before backfilling, sensors should be installed to monitor the pressure on the roadway after backfilling.

Construction

It is not possible to install adapter modules or set up solar panels in a few hundred meters deep underground. Therefore, after setting the acquisition time, it is necessary to regularly take the computer to the underground to export the collected data. Note: No signal can be collected normally, but it cannot be uploaded. Through the alternating power supply of two 12v batteries to ensure the stability of the acquisition instrument. The connecting rod of each steel gauge is welded to a steel bar in series, and this steel bar is vertically topped on the shaft wall, and then concrete is poured, and the strain gauge is tied to the steel bar and poured together in the concrete. After the concrete is completely solidified, the sensor data is collected and the first data is taken as the initial value. After that, each data is compared with the first time to see if there is any change in force.