A stable structure device for supporting the roof of a small coal pile in a coal mine gob-side entry retaining

Abstract

The utility model relates to the technical field of coal mine underground roadway support, specifically is a kind of coal mine along empty roadway small coal pile support roof's stable structure device, including two small coal piles, the lateral wall of two small coal piles is fixedly connected with U type steel hoop, the lateral wall of each U type steel hoop is fixedly connected with support rod, the upper surface of two U type steel hoops and support rod is fixedly connected with same wave board, the lateral wall of each support rod is provided with sliding groove, support device is arranged between two small coal piles, the support adjusting device includes two symmetrically arranged H type steel beams. The utility model can be driven double rack synchronous movement by adjusting wheel, drive H type steel beam to slide in sliding groove, combined with the operation logic of handle down pull unlocking, rotary distance adjustment, push locking, and through the meshing locking of gear ring and gear groove, the interlock of ball and limiting groove, the adjustment of support spacing is realized, solve the adaptive support problem of underground dynamic mine pressure working condition.

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