Concrete body confining pressure loading device for drawing experiment of anchor cable

Abstract

The invention relates to a concrete body confining pressure loading device for a drawing experiment of an anchor cable. The technical scheme is that a cylindrical positioning sleeve which vertically extends upwards is fixed in the center of a base; a blind-hole-shaped positioning hole is formed in the center of the positioning sleeve; symmetrical oil cylinders are vertically arranged on the base at the two sides of the positioning sleeve; a lifting plate is fixed between the movable parts of the oil cylinders; a guide hole for the positioning sleeve to penetrate is formed at the center of thelifting plate; a lower supporting plate is placed on the lifting plate; the lower supporting plate comprises a lower supporting plate body and a supporting sleeve fixedly connected to the lower surface of the lower supporting plate body; and a confining pressure sleeve is disposed on the lower supporting plate body. According to the invention, the eccentric stress of the anchor cable is reduced, the lifting of a concrete test block with huge weight is completed, and a confining pressure is applied to a concrete test block through the confining pressure sleeve, thereby achieving the monitoring,testing and analyzing of mechanical behaviors of a rock test piece in the in-situ environment, and providing a technical support for the supporting theory of mining rock stratum stable control.

Description

technical field [0001] The invention relates to a concrete body confining pressure loading device for anchor cable pulling experiments, which can be used in conjunction with the anchor cable pulling test device (ZL201720537878.8) to realize the decoupling of torque and axial force, and perform anchoring under confining pressure Cable pull test. Background technique [0002] From the perspective of resource exploitation around the world, the depth of coal mining has reached 1500m, the depth of geothermal mining has exceeded 3000m, the depth of non-ferrous metal mining has exceeded 4350m, and the depth of oil and gas resources has reached 7500m. From the perspective of resource mining in China, decades of continuous large-scale resource mining have made shallow mineral resources tend to be exhausted, and mineral resource mining has gradually entered the depth of 1000-2000m. Anchor cable anchoring is safe and economical, and it can give full play to the self-stabilizing abilit...

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Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a concrete body confining pressure loading device for the anchor cable pulling experiment, which can effectively solve the problem of centering and lifting of the concrete test block in the anchor cable pulling experiment. and the problem of applying confining pressure

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