A shield support for steeply inclined medium-thick coal seam

Abstract

The invention discloses a shield support for a steep medium-thickness coal seam, which comprises a lower landing leg and a support beam mutually articulated, wherein the support beam is arched; a free end of the support beam is further articulated with an upper landing leg; the lower landing leg and the upper landing leg are linear; first hydraulic cylinders are movably connected between the upper landing leg and the support beam and between the lower landing leg and the support beam respectively; the lower landing leg comprises a lower landing leg main body and a lower landing leg extension body; the upper end of the lower landing leg main body is articulated with the support beam; a sharp head is arranged at a free end of the lower landing leg extension body; a second hydraulic cylinder is movably connected between the lower landing leg main body and the lower landing leg extension body; the first hydraulic cylinder on the lower landing leg is articulated with the lower landing leg main body by the bottom end of a cylinder body of the first hydraulic cylinder; and the tail ends of piston rods of the two first hydraulic cylinders are articulated with the support beam respectively. The support has the benefits that the support is good in stability and safety and can be adjusted with changes in coal seam thickness and a dip angle, and a coal seam recovery ratio and a level of mechanization are high.

Description

technical field [0001] The patent of the present invention relates to a support facility for medium-thick coal seam mining, in particular to a shield support for the mining of steeply inclined medium-thick coal seams. Background technique [0002] The supporting equipment in the coal mining face is the guarantee facility for the safe work of the coal mine, and its stability during use and the controllability of moving the frame are important indicators of this type of equipment. The existing fully mechanized mining hydraulic support can fully meet the safety and reliability requirements of medium-thick coal seam mining, but it is usually only suitable for the mining of coal seams with an inclination angle of less than 50 degrees. The downward force component is too large, and the stability of the equipment itself is extremely poor. Therefore, the existing hydraulic supports are not suitable for steeply inclined coal seams, and it is difficult to fundamentally eliminate the ...

AI Technical Summary

Problems solved by technology

However, due to the closed structure of the bracket, it is not suitable for the support of the coal mining face; in addition, even if the bracket is used to form a flexible support system for mining in steeply inclined layers, whether it is a roof support beam, a floor support plate or any One side of the side rail is located on the gob side, and there are cases where the hinged parts of the corresponding components are subjected to unequal extrusion loads of gangue. When this situation occurs, since the adjacent components of the support are only connected by hinges, the There are no other auxiliary supporting components between them. This unbalanced load will cause the corresponding components to rotate and become unstable, and there is a serious risk of collapse.

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