Top coal caving operation control device and method based on ultrasonic intensity test

Abstract

The invention belongs to the technical field of mining engineering, and particularly relates to a top coal caving operation control device and method for an ultrasonic intensity test. The top coal caving operation control device comprises an ultrasonic transmitting system, an ultrasonic receiving and, judging system and a signal transmitting system, wherein the ultrasonic transmitting system comprises a plurality of ultrasonic transmitting instruments arranged on the bottom plate of a ultrasonic arrangement lane and provided with power supplies; the ultrasonic receiving and judging system comprises an ultrasonic receiver, a signal judging device and a signal transmitter which are welded on a top beam of a fully mechanized caving mining hydraulic support, the signal transmitting system comprises a coal mining machine signal lamp, an alarm and a controller, and the coal mining machine signal lamp is welded to a coal mining machine, and is in wireless signal transmission with the signal transmitter. The alarm is welded to a top beam of the fully-mechanized caving hydraulic support and is connected with the signal transmitter through a wire, and the controller is fixed to a hydraulic cylinder of a rear support of the fully-mechanized caving hydraulic support and connected with a hydraulic automatic control handle through a controller connecting circuit.

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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