Roof caving morphology monitoring device and method for primary caving period

Abstract

The invention discloses a roof caving morphology monitoring device for a primary caving period. The device comprises a guiding rack, a support rod, a push rod, a scanner and a control module. The roofcaving morphology monitoring device for the primary caving period put forward in the invention is simple in structure and can be used with a fully mechanized top coal caving hydraulic support rack ina matched manner, no manual operation is needed, a safety problem is solved, the device can be used with the hydraulic support rack in an integrated manner, and recovery can be facilitated.

Description

technical field [0001] The invention relates to the technical field of industrial and mining safety monitoring, in particular to a device and method for monitoring the form of roof caving during initial discharge. Background technique [0002] The basic characteristics of the comprehensive top-coal caving face are: compared with layered mining, the primary mining thickness is significantly increased, the caving height of the upper strata is significantly increased, and the range of rock movement affected by mining in front of the working face is also significantly increased. Monitoring the caving of the top coal and the roof behind the working face plays an important role in determining the process parameters such as the coal-drawing step distance, and selecting the appropriate coal-drawing step distance is crucial to improving the recovery rate and reducing the gangue content. In order to ensure the safe and efficient production of the working face, it is necessary to monit...

AI Technical Summary

Problems solved by technology

In the traditional deformation monitoring methods, the internal deformation monitoring of rock mass mainly adopts multi-point displacement meters, drilling inclinometers and other means, and the deformation monitoring of empty areas including roadways mainly uses multi-point displacement meters, roof settlement meters, convergence meters, and levels. Theodolite and other surveying methods and means, this type of method has a small amount of observation data, and it is impossible or difficult to monitor uninhabited areas. Manual monitoring is mostly used, which is labor-intensive, low in efficiency and poor in timeliness, and cannot quantitatively observe the collapse of goafs, etc.

Common goaf roof monitoring methods such as pressure pillows have low measurement accuracy and are difficult to place and recover

[0004] However, some of the existing three-dimensional structure detection devices for underground cavities cannot be used in the special working conditions of coal mines, such as not meeting the explosion-proof requirements, etc.; Poor timeliness; or unable to move with the hydraulic support, which is not convenient for downhole operation

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