Triangular area hydraulic support top protection device on upper end of large-inclination-angle working surface

Abstract

The invention discloses a triangular area hydraulic support top protection device on the upper end of a large-inclination-angle working surface. The triangular area hydraulic support top protection device comprises a triangular area hydraulic support, wherein a top beam of the triangular area hydraulic support is provided with double-action side pushing jacks at intervals, the maximum stroke of the double-action side pushing jacks is 0.3-0.5 times the width of the hydraulic support, a beam body of the top beam is provided with a side protection board, a base of each double-action side pushing jack is fixedly arranged on the side protection board, the beam body is provided with a top beam movable side protection board which is of a box body structure, the width of the top beam movable side protection board is equal to that of the hydraulic support, a push rod of each double-action side pushing jack is connected with a connecting rod, the end of each connecting rod is fixedly arranged on an inner side board of the top beam movable side protection board, the outer side of the top beam movable side protection board is provided with a triangular box body of which an top angle is alpha, and the sum of the top angle alpha and an inclination angle of a working surface is equal to 90 degrees. The triangular area hydraulic support top protection device disclosed by the invention is suitable for the supporting and protecting of a top board in a triangular area exposed on the upper end of the large-inclination-angle working surface, not only can the stability of an end support be effectively controlled, but also a person can be prevented from being damaged due to the falling off of waste rocks on the top board exposed in the triangular area, and the safety of a worker under the triangular support can be ensured.

Description

technical field [0001] The invention relates to a hydraulic support top protection device, in particular to a hydraulic support top protection device suitable for a triangular area at the end of a fully mechanized mining face with a coal seam inclination angle of 25° to 55°, and belongs to the field of mining machinery. Background technique [0002] Coal occupies a major position in my country's energy consumption structure. With the sustained and rapid development of the national economy and the continuous growth of energy demand, the overall trend of my country's coal mining is: transfer to the west and extend to the deep. The inclination angle of the large-inclination coal seam is between 25° and 55°. At this time, gangue and coal lumps falling from the roof will cause sliding and instability of the support of the fully mechanized mining face. The reserves of high-dip coal mines in western my country account for more than 45% of the total reserves. After years of high-int...

AI Technical Summary

Problems solved by technology

[0003] Since the support of the end of the working face with a large inclination angle will form an exposed triangular area, the gangue and coal lumps falling from the exposed roof in the triangular area will cause the support to slide and become unstable, and also cause safety hazards to the staff under the support

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