Apparatus and method for caving coal caving operation control based on ultrasonic intensity test

Abstract

The invention belongs to the technical field of mining engineering, in particular to a device and method for controlling the top coal caving operation of ultrasonic intensity testing. It includes an ultrasonic transmitting system, an ultrasonic receiving and judging system and a signal sending system. The ultrasonic transmitting system includes a number of ultrasonic transmitters with their own power supplies installed on the floor of the high-level ultrasonic layout roadway. The ultrasonic receiver, signal judge and signal transmitter on the beam, the signal sending system includes the signal light of the coal mining machine, the alarm and the controller, in which the signal light of the coal mining machine is welded on the coal mining machine, and the signal transmission is carried out through radio and signal transmitter , the alarm is welded on the top beam of the fully mechanized hydraulic support, connected to the signal transmitter through wires, the controller is fixed on the hydraulic cylinder of the rear support of the fully mechanized hydraulic support, and connected to the hydraulic automatic control handle through the controller connection line.

Description

technical field [0001] The invention belongs to the technical field of mining engineering, in particular to a device and method for controlling the top coal caving operation of ultrasonic intensity testing. Background technique [0002] When fully mechanized top-coal caving is the main coal mining method for thick coal seams and extra-thick coal seams in my country, the core of the process is to master the correct coal-caving time. Too short coal-caving time leads to the inconspicuous top-coal caving, resulting in top-coal failure. Fully collapsed, a waste of coal resources, too long coal discharge time causes the top coal to completely collapse, but the top coal directly above the top coal also enters the rear slide, affecting the quality of coal production and increasing the burden of coal preparation operations. There are two existing control methods for coal-drawing operations: "close the window when seeing gangue" with the naked eye of the coal-drawing worker, and "close...

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Problems solved by technology

[0002] When fully mechanized top-coal caving is the main coal mining method for thick coal seams and extra-thick coal seams in my country, the core of the process is to master the correct coal-caving time. Too short coal-caving time leads to the inconspicuous top-coal caving, resulting in top-coal failure. Fully collapsed, a waste of coal resources, too long coal discharge time will cause the top coal to collapse completely, but the top coal directly above the top coal will also slip back, affecting the quality of coal production and increasing the burden of coal preparation operations

There are two existing control methods for coal-drawing operations: "close the window when seeing gangue" with the naked eye of the coal-drawing worker, and "close the window based on radiation induction judgment". Inductive judgment to close the window” mainly depends on the radiation induction device installed on the bracket. This device can limitedly identify coal and gangue, but if there is a thick gangue layer in the coal seam, this device will fail

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