Narrow coal pillar gob-side entry end self-expansion reinforced anchoring type anchor rod structure and method

Abstract

The invention discloses a narrow coal pillar gob-side entry end self-expansion reinforced anchoring type anchor rod structure and a method. The narrow coal pillar gob-side entry end self-expansion reinforced anchoring type anchor rod structure and the method are suitable for being used in deep well gob-side entry narrow coal pillars. The narrow coal pillar gob-side entry end self-expansion reinforced anchoring type anchor rod structure comprises a hollow anchor rod, a metal tray, a nut, a stop-grouting plug, a metal porous expansion lock body, a carbon fiber expansible rubber bag, bag passive protection wings, a grouting pipe and a one-way valve body set; during use, the low-pressure grouting is conducted through an expansion end, the carbon fiber expandable rubber bag expands, the bag passive protection wings are unfolded, after slurry in the bag is solidified, the expansion anchoring end is formed, and the anchoring strength of the anchor rod is improved; and the hollow anchor rod is subjected to drilling and high-pressure grouting, so that the mechanical property of the crushed coal and rock mass in the narrow coal pillar is improved, the anchoring length of the narrow coal pillar is increased, the anchor rod supporting effect is improved, stable control of the deep well narrow coal pillar gob-side entry surrounding rock is achieved, and the narrow coal pillar gob-side entry end self-expansion reinforced anchoring type anchor rod structure has the advantages of being economical, reliable, simple in structure and convenient and fast to install.

Description

technical field [0001] The invention relates to an anchoring type bolt structure and method, especially a kind of self-expanding and enhanced anchoring type anchor rod structure and method for narrow coal pillars along the hollow and along the trough end of the deep well, which is suitable for use in deep wells. The technical field of support for narrow coal pillars in an empty channel. Background technique [0002] In recent years, higher requirements have been put forward for the recovery rate of coal and other mineral resources. The technology of narrow coal pillar along the goblin (digging) has been widely promoted and applied in the field of coal mines in my country; The recovery rate of coal resources avoids the waste of resources. However, as the mining depth of coal resources continues to increase, the mining environment and geological conditions are becoming more and more complex. In some areas of high ground stress, large deformation and damage occur in the surround...

AI Technical Summary

Problems solved by technology

[0004] Technical problem: The purpose of this invention is to overcome the deficiencies in the prior art, and to provide a self-expanding and reinforced anchoring type bolt anchoring device and its use method at the end of the narrow coal pillar along the hollow and along the groove, so as to make up for the existing common anchor. Defects of Rod in Narrow Coal Pillar Bolt Anchoring Strength and Insufficient Bearing Capacity of Narrow Coal Pillar in Deep Mine

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