Truss supporting technology for ingredient top slope deformation control

Abstract

A truss supporting technology for controlling ingredient top slope deformation is adapted for controlling the sinkage of wide span alley way top board separation layer, the top board and alley slope shear-slip breakaway or controlling the deformation of alley slope part. When using an anchor rod anchorage cable support for ingredient top board or alley slope part, plural trusses composed of two steel twist lines and double hole steel bushing coupler is set on the ingredient top board or alley slope part with spaces for support, each truss is shielded under the anchor solid, two steel twist lines are connected and locked by the coupler to form expansion and pull force to generate extrusion and protection function for the ally way top board or slope part. Not only the problem that the sinkage of the wide span alley way top board separation layer and the top board and alley slope shear-slip breakaway is solved, the top board is supported effectively, but also the displacement of the alley slope towards to alley inside is controlled, thereby the deformation of the alley slope is reduced, so the alley way can satisfy production requirement. In addition, the connection of the support whole body between the steel twist lines is adopted to change the limit of single anchorage cable support. The structure is simple, convenient in use and has broad practicability.

Description

1. Technical field [0001] The invention relates to a truss support technology for controlling the deformation of the coal-rock roof, and is especially suitable for controlling the separation and subsidence of the roof of a large-span roadway, the shear slipping and caving of the roof and the roadway, or controlling the deformation of the roadside. 2. Background technology [0002] After the eighth, ninth and tenth five-year continuous research, the coal roadway bolt support technology has become increasingly mature, and the range of bolt support has been gradually applied from conditions I, II, and III to conditions IV and V. Especially under these complex conditions Especially for roadways with high ground stress and long spans, the separation layer deformation of the roof of the roadway is particularly serious. Only the anchor rods and cables currently used cannot effectively support the roof, and the phenomenon that the roof as a whole shears and slides along the two walls...

AI Technical Summary

Problems solved by technology

[0002] After the eighth, ninth and tenth five-year continuous research, the coal roadway bolt support technology has become increasingly mature, and the range of bolt support has been gradually applied from conditions I, II, and III to conditions IV and V. Especially under these complex conditions Especially for roadways with high ground stress and long spans, the separation layer deformation of the roof of the roadway is particularly serious. Only the anchor rods and cables currently used cannot effectively support the roof, and the phenomenon that the roof as a whole shears and slides along the two walls of the roadway frequently occurs; in addition, due to Affected by high stress, the deformation of the side of the coal seam roadway is also very large, which often causes the roadway to shrink and deform, making the roadway unusable. The deformation of coal pillars, especially the side walls of coal pillars, has obvious deformation at the beginning of roadway excavation. In the mining stage, the deformation usually reaches more than 70% of the total deformation, and the section shrinks by nearly 2 / 3. The roadway cannot be used, and even causes Due to safety accidents, many working faces had to stop production to renovate the roadway or dig another roadway, which brought great harm to the production and safety of the mine

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