Mine tray for prejudging magnitude of anchoring force on basis of surface deformation and monitoring method

Abstract

The invention provides a mine tray for prejudging the magnitude of anchoring force on the basis of surface deformation and a monitoring method. According to the mine tray, a tray body comprises a spherical-crown-shaped part and a flat plate part; a deformation recognizing unit comprises four strip-shaped plastic thin pieces which form a cross shape and are attached to the surface of the spherical-crown-shaped part, one end of each strip-shaped plastic thin piece starts from the edge of an anchor rod hole, and the other end of each strip-shaped plastic thin piece extends to the edge of the spherical-crown-shaped part; each strip-shaped plastic thin piece is composed of a green section, an orange section and a red section, the surface of each strip-shaped plastic thin piece is coated with areflecting film material and covered with a fin unit, and the fin unit is composed of multiple rows of rectangular small plastic pieces distributed in the length direction of the strip-shaped plasticthin piece. The method includes the steps of calibrating the mine tray through a compression testing machine, installing mine trays produced in the same batch as the calibrated mine tray on site, andestimating the magnitude of the anchoring force. By means of the tray and the method, the stress conditions of a corresponding anchor rod or anchor cable can be conveniently and visually prejudged, and the labor intensity and monitoring cost of monitoring staff can be remarkably reduced.

Description

technical field [0001] The invention belongs to the technical field of anchoring support for coal mine roadways, and in particular relates to a mining tray and a monitoring method for predicting the magnitude of anchoring force based on surface deformation. Background technique [0002] As one of the rock mass deformation control technologies with the lowest economic cost, the most obvious technical benefits and the simplest operation process, the current bolt support technology plays an extremely important role in the fields of slope control, subway tunnels, underground mine construction, etc. The superiority is self-evident. The bolt support structure is usually composed of visible parts and invisible parts. The invisible parts are mainly rods and anchor nodes that go deep into the rock mass, and the visible parts are mainly exposed threaded sections of trays, nuts and bolts. Therefore, the invisible part has greater concealment, and its mechanical bearing state is often ...

AI Technical Summary

Problems solved by technology

Considering practical factors such as economic cost, time-consuming installation, and time-consuming data collection, it is unrealistic to install pressure gauges for each bolt support system to monitor its anchoring force. However, traditional technical solutions have many monitoring blind spots. , poor data contrast, data collection is greatly affected by coal dust and other negative factors. At the same time, the pressure gauge also has a certain failure rate in practical applications, which cannot truly reflect the real force of the bolt body

In the background of this engineering technology, in coal mines, accidents often occur in coal mines where the nut comes out of the bolt without warning or the bolt breaks and pops up to injure people, or a small area of ​​deformation and collapse accidents occur, resulting in the failure of the bolt support system to be effectively integrated with other systems. Support system produces synergistic effect

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