Testing device and testing method of full-length anchoring anchor rod drawing

Abstract

The invention discloses a testing device of a full-length anchoring anchor rod drawing. The device comprises a water spraying system which is arranged at one end of a working table, the water sprayingsystem is provided with a water tank connected with a steel pipe sleeve and used for supplying water for the water tank, one end of the steel pipe sleeve is connected with a water spraying system, the other end of the steel pipe sleeve is connected with a pressurization system, and a cavity for placing an anchor rod is arranged in the middle of the of the steel pipe sleeve; a temperature controlsystem comprises a polyethylene multi-layer pipe arranged on the outer wall of the steel pipe sleeve; a silicone rubber heating band winds around the outer wall of the steel pipe sleeve, and a temperature controller is used for controlling the silicone rubber heating band to heat; and the pressurization system is arranged at the other end of the working table and comprises a drawing force loadingassembly and an oil pressure loader, wherein the drawing force loading assembly is used for measuring the pressure output by an oil pressure loader and the axial displacement of the anchor rod under the action of the pressure. According to the experimental device, the drawing testing of a full-length anchoring body synchronously carried out can be realized under the action of the temperature and awater environment, a mechanical state and a damage characteristic of the tested anchoring material under the action of terrestrial heat and underground water in the deep underground are objectively reflected.

Description

technical field [0001] The invention relates to the technical field of anchor rod pull-out tests, in particular to a full-length anchor rod pull-out test device and a test method. Background technique [0002] With the gradual mining of coal mines, the depth, breadth and strength continue to increase, and there are a large number of complex and difficult roadways in deep underground roadways, such as roadways with soft expansive surrounding rocks, roadways with broken surrounding rocks, roadways affected by ground temperature and groundwater. Coal mine roadway needs support to ensure the safety of the roadway. Coal mine roadway support generally adopts bolt support technology. With the reduction of the cost of the anchoring agent and the improvement of the bonding performance, the resin bolt support technology has been widely used in the coal mine roadway support. However, for complex and difficult roadways in deep underground, the application of bolt support cannot achieve...

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Problems solved by technology

[0003] Chinese invention patent "Anchoring Material High Temperature Drawing Experimental Device and Experimental Method" (patent application number: 201410813728.6) provides an anchoring material high temperature drawing experimental device and its experimental method, this invention can realize the drawing of anchoring material at high temperature Experiment, but the experiment only simulates the pull-out test under the influence of temperature, and there is a certain gap between the bolt anchorage under the coupling effect of ground temperature and water in the real deep underground

[0004] In the papers "The Influence of Water and Temperature on the Anchor Force of Resin Bolts" and "Res

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