Reclaimable screw anchor
A screw-type, bolting technology, applied in the installation of bolts, mining equipment, earth-moving drilling and other directions, can solve the problems of not being able to anchor the full length, low recovery rate, etc., to save costs, speed up the construction progress, and achieve good anchoring effect. Effect
Inactive Publication Date: 2011-01-19
张延策
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Problems solved by technology
In order to solve the problem of low recovery rate of ordinary bolts and incapable of full-length anchoring, the present invention provides a spiral retrievable bolt
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The invention provides a reclaimable screw anchor. The outer surface of a steel pipe is welded with a spiral triangle wire; the tail of the steel pipe is welded with a tail bolt provided with a nut; and a tray is arranged between the nut and the triangle wire on the steel pipe. The reclaimable screw anchor has the advantages that: the reclaimable screw anchor can be reclaimed integrally and can be repeatedly used so as to greatly reduce use cost; the reclaimable screw anchor can anchor at overall length, has strong anchoring force and good anchoring effect, and is particularly suitable for softrock and hydrous geological conditions; and the reclaimable screw anchor is directly screwed in without anchoring agent during installation, the cost and solidification time of the anchoring agent are saved, and the construction progress is greatly accelerated.
Description
technical field The invention relates to the field of roadway support in the mining industry, in particular to a spiral recoverable bolt. Background technique At present, bolt support has been widely used in coal mines, mine roadways, deep foundation pit support, railway, road slope protection and other fields. In temporary support, in order to save energy, reduce consumption, and eliminate underground environmental pollution, bolt recovery has become an urgent problem to be solved. Most of the temporary support bolts used in the past cannot be recovered as a whole, or the recovery rate is low, and the full length cannot be achieved. Anchoring, the anchoring effect is poor, an anchoring agent is needed, and the installation time is long. Therefore, it is particularly important to invent a bolt that can be easily installed and has a high recovery rate. Contents of the invention In order to solve the problem of low recovery rate of ordinary bolts and incapable of full-leng...
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Inventor 张加冕包宏涛王军潘科峰
Owner 张延策
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