Coal mining machine material blocking mechanism suitable for large-pitch mining angle and wide mining high-range working surfaces

Abstract

The invention relates to a coal mining machine material blocking mechanism suitable for large-inverted-angle and wide-mining high-range working surfaces. The material blocking mechanism comprises a machine body material blocking device and a rocker arm material blocking device, wherein a machine body primary material blocking plate of the machine body material blocking device is driven by a firsttelescopic mechanism to move up and down relative to a machine body, and a machine body secondary material blocking plate of the machine body material blocking device is driven by a second telescopicmechanism to move up and down relative to the machine body primary material blocking plate; a rocker arm material blocking plate of the rocker arm material blocking device is driven by a third telescopic mechanism to do linear motion perpendicular to the extending direction of a rocker arm in a plane parallel to the front side surface of a rocker arm shell body, a safety gap is kept between the foremost end of the machine body material blocking device and a tail tooth cutting surface at the rear end of a coal mining machine roller, and a safety gap is kept between the foremost end of the rocker arm material blocking device and the tail tooth cutting surface at the rear end of the coal mining machine roller. According to the material blocking mechanism, the problem of material blocking protection of the lower coal and the floating coal in an inverted-mining state at large-mining-height and wide-mining high-range mining is solved, and the side turning possibility of the coal mining machine is reduced.

Description

technical field [0001] The invention relates to a material retaining mechanism of a coal shearer, which is especially suitable for coal comprehensive mechanical mining occasions in a working face with a large elevation mining angle and a wide mining height range, and belongs to the technical field of underground coal mining machinery. Background technique [0002] The mining of coal seam working faces with large elevation mining angle and wide mining height range mainly needs to solve the problem of anti-caving of coal wall and the matching problem of mining machine and support. Side guard, so that it can support the sloped coal wall to the greatest extent after deployment. The shearer is usually controlled very low to adapt to the local thinner coal seam and lower the center of gravity of the whole machine to prevent rollover. At the same time, the shearer needs a large upper swing angle to keep the rocker arm to mine thicker coal seams. [0003] However, due to the telesc...

AI Technical Summary

Problems solved by technology

However, in the actual mining process, especially in thick coal seams, the lower part of the coal platform and the floating coal of the front drum are far higher than the top surface of the shearer fuselage after mining the upper coal by the front drum, so that a large amount of coal will pass through before the mining by the rear drum. The top surface of the fuselage slides to the operator at the support column, causing serious safety hazards

Although the industry has strengthened the net protection at the column to prevent flying injuries caused by large coal blocks, it cannot fundamentally solve the personal safety problem of the operator

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