Combined height-adjustable coal cutting machine with small roller and large mining height, as well as coal cutting process of combined height-adjustable coal cutting machine

Abstract

The invention relates to a combined height-adjustable coal cutting machine with a small roller and a large mining height, as well as a coal cutting process of the combined height-adjustable coal cutting machine. The combined height-adjustable coal cutting machine comprises a machine body assembly, coal cutting rollers, a travelling mechanism, an auxiliary device, a hydraulic control system and an electrical control system, and is characterized in that combined height-adjusting devices are symmetrically mounted on two side surfaces of the machine body assembly; and each combined height-adjusting device comprises a main height-adjusting oil cylinder, an auxiliary height-adjusting cutting arm and an auxiliary height-adjusting oil cylinder. The coal cutting process adopts a knife inserting method without notch cutting; the coal cutting roller at the front end of the coal cutting machine cuts residual coal bodies under the action of the oscillation of both the main height-adjusting cutting arm and the auxiliary height-adjusting cutting arm, wherein the moving trace is an arc, and the oscillation angle Alpha is at least 90 DEG; and the coal cutting roller at the rear end of the coal cutting machine cuts coal along a bottom plate, wherein the moving trace is a straight line. The coal cutting machine has the advantages that the structure is compact; the size and the weight are smaller; the suitability is strong; the mounting and the transportation are convenient; and the coal cutting machine is suitable for large, middle or small scale of coal mines with large mining heights.

Description

technical field [0001] The invention belongs to underground mining equipment and mining technology of coal mines, and is a composite height-adjusting type small drum large mining height shearer and a coal mining process particularly suitable for large, medium and small coal mines. Background technique [0002] At present, the underground coal mining process of large and medium-sized coal mines is a comprehensive mechanized coal mining process. The coal mining equipment used is a double-drum shearer, hydraulic support, scraper conveyor on the working face, reloader, crusher, belt conveyor, Advance support bracket, etc. The double-drum shearer adopts no incision to feed the knife. When it works normally, the front-end drum cuts coal along the top plate, and the rear-end drum cuts coal along the bottom plate. The diameter of the drum of the double-drum shearer is generally between 1 and 3 meters, and the diameter of the two drums is the highest coal seam thickness that the she...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to solve the problems existing in the above traditional double-drum large mining height coal mining machine, and to provide a machine suitable for large, medium and small coal mines with low power, large mining height, small drum, compound height adjustment, compact equipment structure, small volume and Small in weight, strong in adaptability, easy to install and transport, it can solve the four lows (low resource recovery rate, low output ratio, low speed rate, low efficiency) and three highs existing in the existing large, medium and small coal mining technology (high investment, high energy consumption, high risk) and other prominent problems

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