Three-base-point roof separation layer monitor

Abstract

The invention discloses a three-base-point roof separation layer monitor, and relates to a coal mine production field monitoring instrument. The three-base-point roof separation layer monitor comprises a guide pipe, a mechanical shell, an electrical shell and three sets of independent separation layer monitoring mechanisms same in structure, and is used for respectively monitoring a shallow base point A and a deep base point B of a separation layer and a deep base point C in a steady rock layer, which is 8-14 meters from a tunnel roof. A mechanical and electrical combined monitoring device isdesigned in the invention; displacement between an anchor fluke and the top of a device due to the separation layer is converted into an electrical signal of a potentiometer; displacement of the separation layer is displayed after processing; the measurement effectiveness and accuracy can be improved; the three sets of mutually independent separation layer monitoring mechanisms are designed; the deep base point in the steady rock layer, which is 8-14 meters from the tunnel roof, is increased in the monitoring base points; the base point is used as the stationary reference point, and used as amovement reference of the roof separation layer; and thus, the accuracy and the reliability of the measured separation layer data are ensured.

Description

technical field [0001] The invention relates to an on-site monitoring instrument for coal mine production, in particular to a three-base-point roof separation layer monitor. Background technique [0002] Roof detachment monitoring is to use the roof detachment instrument to monitor the roof subsidence of different layers, so as to grasp the stable state of the roof at any time. The main purpose of installing the roof abscission instrument is to grasp the situation of the roof abscission in time, and to find out the signs of roof instability early, so as to avoid the occurrence of roof fall accidents, which is of great significance to the safe production of coal mines. [0003] The existing products are divided into two categories: purely mechanical and electronic digital display. Compared with the pure mechanical type, the electronic digital display has the following advantages: it can monitor online, store and upload the measured abscission data, which is convenient for co...

AI Technical Summary

Problems solved by technology

[0005]The shortcomings and deficiencies of the existing electronic digital display abscission instrument: 1. Since the measurement base point is within the direct top and the basic top, the depth of the measurement base point is relatively shallow, and it is very difficult to It is difficult to find a fixed reference point, so that there is no accurate reference for the measurement of the separation layer movement and deformation of the roof

2. Due to the special working environment of coal mines - high temperature, humidity, water, sulfur and other corrosive gases, the sliding contact reed of the potentiometer and the fixed contact resistor are easily oxidized and corroded. In this way, the contacts cannot be effectively contacted, so that the transmission of the potential signal cannot be carried out normally, which seriously affects the normal operation of the separation layer monitoring, which is a potential hidden danger in the safe production of coal mines.

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