Method for testing deformation of prepared sample of rock

Abstract

The invention discloses a method for testing the deformation of a prepared sample of a rock. The test method comprises the following steps of: preparing a rock sample: manufacturing a combined grinding drill bit connected with a drill rod of an underground drill rig; installing the underground drill rig, positioning the prepared sample through a positioning convex tip of a main millstone of the combined grinding drill bit, and starting up the underground drill rig to prepare a rock deformation test sample; 2, testing the deformation of the rock: manufacturing a track car, and arranging two force transferring columns on the track car at intervals; fixing bearing plates at one ends of the two force transferring columns, and respectively connecting the other ends of the two force transferring columns with the bearing plates to be taken as a counter-force support for test; and disassembling the underground drill rig and the drill rod, installing the track car, aligning boss tips of the bearing plates with concave points on the surface of the rock deformation sample, and installing a dial indicator and a measurer for testing the deformation to test the deformation of the rock. The method has the advantages that the mechanization of the test of the prepared sample of the rock can be realized, and the test period can be shortened; after the sample is prepared, the quick change between sample preparation and deformation test can be completed within a short time, the method is convenient and quick, and the test setup time can be greatly saved.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a rock mass sample deformation testing method. Background technique [0002] Rock mass deformation test is essential in the design and construction of geotechnical engineering. At present, the rock mass deformation test carried out in China has the following shortcomings: 1. The sample preparation of test samples mainly depends on manual work. Generally, skilled workers need 15-18 working days, the preparation time is long, the cost is high, and the quality of the prepared samples (the fluctuation difference of the samples does not exceed 5mm) is basically not guaranteed; 2. During the deformation test, it is necessary to excavate the reaction seat on the wall or roof of the cave, and then pour mortar on the reaction seat and perform maintenance, which also has the problem of time-consuming; 3. The most widely used The pressure-bearing plate method rock mass deformation t...

AI Technical Summary

Problems solved by technology

At present, the rock mass deformation test carried out in China has the following shortcomings: 1. The sample preparation of test samples mainly depends on manual work. Generally, skilled workers need 15-18 working days, the preparation time is long, the cost is high, and the quality of the prepared samples (the fluctuation difference of the samples does not exceed 5mm) is basically not guaranteed; 2. During the deformation test, it is necessary to excavate the reaction seat on the wall or roof of the cave, and then pour mortar on the reaction seat and perform maintenance, which also has the problem of time-consuming; 3. The most widely used The pressure-bearing plate method rock mass deformation test, the equipment is relatively heavy, and the installation of the equipment consumes manpower and a lot of time. At present, most projects have higher requirements for the test cycle

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