Coal mine U-shaped steel support stress-bearing monitoring and early warning device

Abstract

The invention relates to a coal mine U-shaped steel support stress-bearing monitoring and early warning device. The coal mine U-shaped steel support stress-bearing monitoring and early warning device comprises a connecting device and a monitoring device, the connecting device comprises a base, Z-shaped foot pressing sheets and magnets, support feet of a U-shaped steel support is installed on the base through the Z-shaped foot pressing sheets and attracted to the magnets arranged in the base; the monitoring device comprises a pressure sensor, a processor and an audible and visual warner, one side of the pressure sensor is arranged in the base in an embedded mode, and the pressure sensor is electrically connected with the processor; and the audible and visual warner is connected with the processor and sends out warning signals. According to the coal mine U-shaped steel support stress-bearing monitoring and early warning device, the magnets are adopted to be fixed with the U-shaped steel support, so that the situation that the position changes in the installation process is avoided; the foot pressing sheets are utilized to limit the U-shaped steel support, so that the situation that the monitoring device and the steel support slide relatively in the stress bearing process of the steel support is prevented; the pressure sensor is externally connected to the processor and comparing with prewarning value is conducted, so that the warning signals are sent out timely; and bases are provided for reinforced supporting, and roadway accidents are effectively prevented from happening.

Description

technical field [0001] The invention relates to a force monitoring and early warning device for U-shaped steel supports in coal mines. Background technique [0002] With the continuous development of coal mine roadway support technology, U-shaped steel bracket is an effective way of roadway support. Reusable and safe and reliable, etc.), are more and more widely used. Due to factors such as the irregular shape of the coal mine roadway section, the U-shaped steel bracket is inevitably in poor contact with the roadway wall, resulting in uneven force on the U-shaped steel bracket, which affects the supporting effect of the U-shaped steel bracket. Therefore, the research and development of U-shaped steel support force monitoring and early warning device is of great significance for improving the roadway support effect and preventing the occurrence of roadway surrounding rock instability accidents. [0003] At present, direct method and indirect method are mainly used for force...

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the above problems, and provides a force monitoring and early warning device for U-shaped steel brackets in coal mines. By using magnets to fix the U-shaped steel brackets, the position changes during the installation process are avoided, and the consistency of the monitoring layout positions is effectively guaranteed. The foot piece limits the position of the U-shaped steel bracket to prevent the relative sliding between the monitoring device and the U-shaped steel bracket during the stress process of the U-shaped steel bracket, especially to solve the uneven stress on the arc section of the U-shaped steel bracket when the force suddenly increases. The problem of inaccurate monitoring values ​​is caused; the triangular claws arranged in a triangle are fixed on the wall of the roadway, which solves the inconvenience caused by the uneven wall of the roadway and facilitates the fixing of the monitoring device; by embedding the pressure sensor in the base and connecting it with the piston rod Fixed connection and conflict, and an external processor to reflect the force of the U-shaped steel bracket at the monitoring position in a timely manner. By comparing with the set early warning value, the alarm signal is sent in time, which provides a basis for strengthening support and effectively prevents roadway accidents. occurred; the technical scheme adopted is as follows:

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