A super large mining height hydraulic support

Abstract

The invention discloses a hydraulic support for super-large mining height, which includes a top beam and a double-layer roof protection and side protection mechanism installed on the top beam. The top beam includes an upper slideway cavity and a lower slideway cavity. The roof protection mechanism includes an upper telescopic beam roof protection mechanism and a three-stage side protection mechanism. The upper telescopic beam roof protection mechanism includes an upper telescopic beam slidably installed in the upper slideway cavity and an upper telescopic beam matched with the upper telescopic beam. Beam jack, the three-stage protection mechanism includes a lower telescopic beam slidably installed in the lower slideway cavity, a lower telescopic beam jack matched with the lower telescopic beam, and a three-stage apron installed at the front end of the lower telescopic beam ontology. The ultra-large mining height hydraulic support obtained by the present invention can cope with the side protection problem caused by the increasing mining height of the working face, and is suitable for full-height mining in one-time mining of extra-thick coal seams.

Description

technical field [0001] The invention relates to a support device for a coal mine working face, in particular to a super large mining height hydraulic support. Background technique [0002] With the development of coal mining technology level, the mining depth and mining height of my country's underground coal mines are constantly refreshing the original records, and the parameters of the working face support hydraulic support are also constantly adjusted to adapt to the increased mining height and mine pressure. At present, the maximum mining height of the large mining height working face is generally about 7m. Mining at such a high coal cutting height will cause serious coal wall flaking, and it will be more difficult to control the stability of the surrounding rock of the working face, and the secondary protection cannot be effectively controlled. The coal wall is stable, and the three-stage protection mechanism developed on this basis increases the protection area, and th...

AI Technical Summary

Problems solved by technology

At present, the maximum mining height of the large mining height working face is generally about 7m. Mining at such a high coal cutting height will cause serious coal wall flaking, and it will be more difficult to control the stability of the surrounding rock of the working face, and the secondary protection cannot be effectively controlled. The coal wall is stable, and the three-level side protection mechanism developed on this basis increases the side protection area, and its side protection height is roughly 4 meters

However, for a higher coal cutting height of more than 8m, adding a side protection plate on the basis of the three-level protection side will cause problems such as slow response speed of the hydraulic system, untimely top protection and side protection, and low system reliability.

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