Thin coal seam end hydraulic support

Abstract

The invention provides a thin coal seam end hydraulic support. The thin coal seam end hydraulic support comprises a top beam and a folding type parallel side pushing mechanism hinged to the top beam,wherein the folding type parallel side pushing mechanism comprises an upper side protection plate, a lower side protection plate, a connecting rod and a jack; an upper lug base a of the upper side protection plate is hinged to a top plate lug base A; a lower lug base b of the upper side protection plate is hinged to an upper lug base a' of the lower side protection plate; the upper end of the connecting rod is hinged to a main rib lug base B; the lower end of the connecting rod is hinged to a lower side protection plate lug base b'; the jack is hinged to lug bases C at a web; the lower end ofthe jack is hinged to a lower side protection plate lug base c'; the number of the lug bases A is n, and the number of the lug bases B is n-1; the center lines of hinge holes of the lug bases A are aligned, the center lines of hinge holes of the lug bases B are aligned, and the center lines of the hinge holes of the lug bases A and the lug bases B are equal to the main rib in distance; the numberof the lug bases C is the same as that of the lug bases B, and the lug bases C are positioned between the lug bases A and the lug bases B; the lug base c' is positioned between the upper lug base a' and the lug base b'; and the distance between the center line of the hinge hole of the lug base A and the upper lug base a and the center line of the hinge hole of the lower lug base b and the upper lug base a' is equal to the distance between the center line of the hinge hole of the lug base B and the upper end of the connecting rod and the center line of the hinge hole of the lower lug base b' and the lower end of the connecting rod.

Description

technical field [0001] The invention relates to a coal mine working face supporting device, in particular to a thin coal seam end hydraulic support matched with a transition support. Background technique [0002] my country has a large amount of coal reserves, and the recoverable reserves of thin coal seams with a thickness of less than 1.3 meters account for about 18% of the country's total coal. Thin coal seam is a main form of coal occurrence. In recent years, with the continuous reduction of coal resource reserves and the depletion of medium-thick coal seams, in order to sustain the development of the coal industry and the long-term utilization of existing mines in many mining areas, mining thin coal seams is becoming more and more important. very important. However, thin coal seams are born with poor geological conditions, low economic benefits, low mining height, small working space, poor working environment conditions, and relatively many safety accidents. The devel...

AI Technical Summary

Problems solved by technology

The support of the working surface is connected with the scraper conveyor, and the scraper conveyor moves forward from one side to another during the forward movement process, because the scraper conveyor moves up and down and the working surface is uneven The situation will cause the distance between the transition brackets on both sides of the working face support and the corresponding end brackets of the two roadways to change continuously. When the working face support enters about 400mm toward the right roadway, the left The side leaves the left roadway and enters the working face, because the two upper corners of the roadway cannot be a strict 90-degree angle, and a certain radian of gangue remains, so that the side guard plate of the end bracket is pressed against the gangue, so that the jack cannot be completely Protruding out, resulting in a gap between the transition frame on the left side of the working face and the end bracket on the left, frequent leaks may easily cause safety accidents, and similarly there will also be gaps between the transition frame and the end bracket on the other side, resulting in frequent leaks between the frames

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