Reinforced concrete two-ended anchor cable and construction method thereof

Abstract

The invention discloses a reinforced concrete two-ended anchor cable and a construction method thereof. The two-ended anchor cable comprises an anchor cable front fixed end and a main body anchor cable, wherein the anchor cable front fixed end is composed of a front lockset, a guide head, a front locking ring, a clamping ring, short reinforcing steel bars, a pushing device, a short pushing rod, acapsular bag, a grouting pipe, a grouting pipe clamping device and a rear locking ring; and the main body anchor cable is composed of an anchor cable body, a rear lockset, a tray and a long pushing rod. According to the reinforced concrete two-ended anchor cable and the construction method thereof, a novel bidirectional reinforcing technology for a deep thick coal seam small coal pillar for roadway driving along a goaf is provided, coal pillar bidirectional reinforcing can be rapidly and effectively completed on one side of a newly excavated roadway, the action that the lateral confining pressure of the coal pillar is reinforced and thus the coal pillar bearing capacity is improved can be realized, the problem that a traditional roadway driving along the goaf technology cannot realize one-way construction and bidirectional reinforcing is solved, the problem that the capsular bag cannot be fully distended when the two-ended anchor cable is grouted is solved, and meanwhile, grouting pipes with lager inner diameters can be assembled to better complete the grouting.

Description

technical field [0001] The invention relates to a two-way reinforcement device for small coal pillars in deep thick coal seams and a construction method thereof. Background technique [0002] With the increasing depth of coal mining and the thickness of coal seams, the stress of the original rock is gradually increasing, the width of coal pillars is getting larger and larger, and a large amount of coal resources are wasted. Considering the stress environment of the surrounding rock of the roadway and the maximum exploitation of coal resources, the mining technology of roadway protection without coal pillars, including retaining and driving along the gob, was proposed. Unlike gob-side retaining, which is affected by two mining operations in the process of roadway formation and working face mining, and roadway maintenance is extremely difficult, gob-side entry effectively avoids the stress disturbance on the coal pillar caused by mining at the upper working face, and the roadw...

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Problems solved by technology

[0006] In order to solve the problem of unsatisfactory expansion of the bag when the two-way reinforcement of the expansion-lock type cross-piercing anchor cable and the problem that the traditional gob-side entry technology cannot realize two-way reinforcement in one-way construction, the invention provides a reinforced concrete cross-piercing anchor cable and its construction. method

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