System and method for testing aging characteristics of bolt system on basis of creep testing machine

Abstract

The invention discloses a system and a method for testing aging characteristics of a bolt system on the basis of a creep testing machine. The system comprises a sample preparation device, a sample loading device and a strain detection device, wherein the sample preparation device is fixed on a steel frame and comprises a sample fixture, fixed steel plates and bolts, a sample is mounted in the sample fixture, strain gauges are embedded in the sample, and the bolts are inserted in the central line of the sample and connected with the fixed steel plates; the sample loading device comprises the creep testing machine and a pressure switching device, a base of the pressure switching device is fixed on a worktable of the creep testing machine, and the upper part of the pressure switching device is connected with a pressure head of the creep testing machine; the bolts penetrate through holes I of the pressure switching device and connected with the fixed steel plates. The system simulates change of stress and strain of the bolt system along with time in an engineering environment and provides technical support for long stability of a bolt supporting body under the condition of stress-seepage coupling.

Description

technical field [0001] The invention relates to the aging characteristics of a bolt system, in particular to a brand-new testing system and testing method based on a creep testing machine for real-time measurement of the aging characteristics of a bolt system under hydraulic coupling. Background technique [0002] With the increasing number of deep underground projects, deep rocks have been in a complex geological environment of "three highs and one disturbance" for a long time. In the surrounding rock support, the bolt has become an effective means to solve the stability problem of the underground roadway due to its characteristics of small disturbance to the original rock, fast construction speed, and saving engineering materials. With the increase of anchorage time, rock mass anchorage shows obvious creep characteristics during the service period, which poses a huge threat to the safety of deep underground engineering. Aiming at the safety of mining engineering, undergro...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing research results are not enough to describe the stress-seepage coupling mechanism and its temporal and spatial evolution characteristics of different anchoring methods and anchoring structures, and provide a method for simulating the stress and strain of the anchor system in the engineering environment. The test system and test method for the aging characteristics of the anchor rod system based on the creep tester

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