A rock burst coal seam roadway support structure

Abstract

This invention provides a support structure for coal seam roadways prone to rockbursts, comprising steel arch frames with a protective mesh between every two adjacent steel arch frames. The protective mesh has several connecting blocks, adapted to connect with adjacent steel arch frames, arranged along the span of the steel arch frames on both the front and rear sides of the roadway extension direction. Several base plates are housed along the span of the steel arch frame facing the roadway wall. By driving a movable rod axially away from the base plates relative to a positioning column, an actuating component is triggered, forcing the expansion body to expand and deform, abutting against the roadway wall. Further driving the movable rod to rotate relative to the positioning column triggers a positioning component, locking the relative position of the positioning column in the positioning hole. This invention, by providing several expansion bodies that can abut against the roadway wall along the span of each steel arch frame, can form uniformly distributed support or multi-point localized concentrated support in the rockburst roadway, sharing and buffering the stress released by localized blasting, improving the support effect, reducing damage to the support structure, and preventing safety accidents.

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