Weakly-consolidated rock test piece machining technology

Abstract

Provided is a weakly-consolidated rock test piece machining technology. The technology comprises the following steps that 1, drilling is conducted on the field to take a cylindrical rock core; 2, one or two chip grooves are formed in the circumferential surface of the rock core in the generatrix direction; 3, the rock core is placed in a fixture, and it is guaranteed that the center line of the rock core coincides with the center line of a drilling tube; 4, a radial drill and an air blower are started, and the rock core is machined to be a long-column-type test sample of which the outer diameter is 51 mm; 5, a PVC pipe and the long-column-type test sample are placed on a cutting machine to be cut; 6, the circumferential surface of the test sample which is 100 mm long and / or the circumferential surface of the test sample which is 50 mm long are ground. According to the weakly-consolidated rock test piece machining technology, drilling machining is conducted on the field drilling rock core test sample through a drilling system, one or two chip grooves are formed in the circumferential surface of the rock core in the generatrix direction in advance, drilling jamming caused by chip agglomeration in the weakly-consolidated rock standard test sample machining process is effectively avoided, the unsmooth drilling phenomenon is avoided, and the completeness of the test piece can be guaranteed by adopting an air cooling mode.

Description

technical field [0001] The invention belongs to the technical field of weakly cemented rock research experiments, and in particular relates to a processing technology for rock weakly cemented rock specimens. Background technique [0002] Weak cementation is a typical cemented state of rock formations in the western region. The internal cracks and pores are well developed, the degree of cementation is relatively poor, and the cohesion is relatively low, resulting in relatively poor mechanical properties of rocks, relatively low strength, and low load-bearing capacity. After the water, the rock surface begins to crack, and the rock has a tendency to gradually disintegrate. However, with the transfer of the national energy strategy, the development of energy in the western region has been intensified, and weakly cemented rocks have to be exposed to more extensively in practice. However, the research on the physical and mechanical properties of weakly cemented rocks is far from ...

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Problems solved by technology

However, with the transfer of the national energy strategy, the development of energy in the western region has been intensified, and weakly cemented rocks have to be exposed to more extensively in practice. However, the research on the physical and mechanical properties of weakly cemented rocks is far from meeting the needs of actual production. Therefore, it is necessary to analyze the physical and mechanical properties of weakly cemented rocks in the western region, and establish a relatively complete mechanical system for weakly cemented rocks, so as to better guide the actual production

The research on engineering rock mass often starts with a series of related experiments in the laboratory. However, due to the relatively low degree of bonding between the weakly cemented rock particles, the rock is easily broken, and it is difficult to process through conventional rock specimen processing methods. forming

[0003] At present, the processing technology of rock material specimens in the laboratory is mostly to add water in the drilling project, but under the action of water, the weakly cemented rocks are easily softened and disintegrated by water, and the processing will not form.

If the existing processing technology cannot be used to make a complete rock sample, it cannot meet the needs of the experiment, so it is urgent to improve the existing processing technology so that the processed test piece can meet the size requirements of the experiment in the laboratory

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