A method of supporting roadway surrounding rock by adjusting support pressure

Abstract

The invention relates to the field of underground construction surrounding rock support and particularly to a supporting pressure adjustment roadway surrounding rock support method. The supporting pressure adjustment roadway surrounding rock support method utilizes an underground construction roadway yield support system. The underground construction roadway yield support system comprises yield hydraulic pillars, yield anchor bolts, meshes, a steel beam, a pressure sensor and a controller. The meshes are laid on roadway surrounding rock, and the roadway surrounding rock is supported through the yield bolts; the steel beam is erected and performs roof support through the yield hydraulic pillars; every yield anchor bolt comprises an anchoring head, one or more yield connectors, an elastic cushion block, a W-shaped steel strip, a base plate, a yield device and a handle nut, wherein the yield connector is used for connecting a left anchor bolt body and a right anchor bolt body and is a cavity, the two anchor bolt bodies are arranged inside the end portions of the cavity and provided with piston stoppers, and springs are arranged between the piston stoppers and the end portions of the connector cavity. Therefore, the supporting pressure adjustment roadway surrounding rock support method can achieve constant yield support according to actual geological surrounding rock stress situations, adjust the status of a support system to form a good yield-support support system and accordingly obtain optimized constant yield support.

Description

technical field [0001] The invention relates to the field of underground engineering surrounding rock support, in particular to a method for supporting roadway surrounding rock by adjusting the support pressure. Background technique [0002] In the field of underground engineering such as mines and tunnels, it is essential to support the surrounding rock of the roadway. In the mining field, with the increasing mining depth, the in-situ stress increases significantly, and the stress of the surrounding rock of the roadway increases. In the deep roadway, the surrounding rock geology is soft rock, the soft rock roadway is deformed greatly, and the roadway support is difficult. [0003] For the support of engineering structures such as roadways and tunnels in large deformation underground engineering, there are mainly three forms of passive support, active support and joint support at home and abroad. The rock self-stabilizing ability is the basic support idea in this field. The...

AI Technical Summary

Problems solved by technology

[0003] For the support of engineering structures such as large deformation underground engineering roadways and tunnels, there are mainly three forms of passive support, active support and combined support at home and abroad. In order to better support the surrounding rock of soft rock roadways and give full play to the surrounding rock The rock self-stabilization ability is the basic support idea in this field. The support system can properly release the deformation energy of the surrounding rock to form an integrated support system of “relief and support” and give full play to the self-stabilization ability of the surrounding rock. At the same time, the support system can properly Release energy and provide strong support at the same time. However, the yield support system in the existing technology either cannot achieve a constant working resistance well, or the constant working resistance depends on the structure of the support system itself, and cannot be based on the roadway Adjusting the actual surrounding rock geological conditions often fails to achieve the expected support-surrounding rock integrated support effect

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