Grouting Anchor Tubular Bolt with Circular Energy-Busting Blasting Hole

Abstract

The invention relates to a grouting anchoring tubular type anchor rod for a circular shaped charge blasting hole. The grouting anchoring tubular type anchor rod for the circular shaped charge blasting hole comprises a hollow tubular type rod body with the two ends opened, a baffle ring and a cushion board. Multiple circular openings are formed in the tube wall of the tubular type rod body in different positions and different directions. The top end of the tubular type rod body is filled with stemming and provided with the baffle ring with the cushion board; a primer cartridge with a detonator is arranged in the tube wall at the bottom end of the tubular type rod body; shaped charge is arranged in the tube wall with the circular openings. According to the grouting anchoring tubular type anchor rod for the circular shaped charge blasting hole, the structure is simple, construction is convenient, and cost is low; the anchoring force can be supplied immediately so that the instant anchoring effect can be obtained; meanwhile, a traditional anchoring load transmission mechanism is changed fundamentally and a novel friction-plug composite anchoring and grouting reinforcing comprehensive support system is established.

Description

technical field [0001] The invention relates to the technical field of rock and soil reinforcement and support, in particular to a tubular bolt for grouting and anchoring circular energy-gathering blast holes. Background technique [0002] Rock-soil anchoring is to tightly interlock the strata through the anchor bolts buried in the formation, relying on the interaction between the anchor bolt-grouting body-hole wall rock-soil physical force to mobilize and improve the rock-soil mass's own strength and natural strength. It is a technology to improve the stress state of the anchored rock and soil mass to make it stable, so as to ensure the safety of the project. The engineering application of geotechnical anchoring technology originated from the end of the 19th century. With the development of its theoretical research and technology, it has been widely used in mining, water conservancy, hydropower, highway, railway, municipal, urban construction, geology, military industry and...

AI Technical Summary

Problems solved by technology

When the anchoring force that needs to be provided is large, ordinary bolt anchorage can no longer meet the needs of the project, which undoubtedly restricts the application and development of rock-soil anchorage technology. How to improve the load transfer mechanism of rock-soil anchorage and overcome the disadvantages of ordinary bolt anchorage , improving the anchoring force of bolts, comprehensively using rock-soil reinforcement measures, and enhancing the stability of rock-soil mass are the fundamental ways to promote the development of rock-soil reinforcement technology

[0005] In addition, the grouting body in rock-soil anchorage can hardly provide anchoring force before consolidation, so it cannot meet the requirement of providing anchoring force immediately after excavation of weak rock-soil mass

Although the existing pipe-slit bolts overcome the above-mentioned shortcomings, the anchoring force can be provided immediately after the bolt is installed, which is beneficial to timely control the deformation of the rock and soil mass, but the anchoring force that can be provided is not large; at the same time, due to the weak The rock and soil will squeeze into the pipe cavity from the pipe seam of the pipe seam anchor, which will also cause a further decrease in the anchoring force

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