Dry core-taking device and core-taking method for soft rock

Abstract

The invention discloses a dry core-taking device and a core-taking method for a soft rock. The dry core-taking device for the soft rock comprises a core-taking drill bit, an internal wind cooling system and an external wind dust suction system. The method comprises the following steps: firstly, assembling various parts before taking the core, and mounting the assembled pats on a core-taking machine; injecting the compressed, dried and cooled air into the inner wall of a core-taking pipe through an annular air blower in the core-taking process, thus rapidly dissipating the heat generated by grinding of the drill bit and the rock; reducing the temperature of the drill bit and a rock sample, and timely discharging the residual rock waste between the inner wall of the drill bit and the rock core from a waste outlet in the outer wall of a rock core pipe of the drill bit; simultaneously forming a closed hollow cavity by a dust suction hood, the rock, the rock core pipe and the like; and preventing the rock waste and cold air from leaking outside, and discharging the rock waste and heat through the dust suction system. Through coordination operation of the components, dual functions of cooling the drill and discharging waste are achieved; the dry core-taking device is suitable for dry and anhydrous core taking of soft rocks; the integrity of a soft rock sample structure can be ensured; and the rock sample processing quality and the core-taking efficiency can be improved.

Description

technical field [0001] The invention relates to a coring device and method for indoor test and research of rocks, in particular to a soft rock dry coring device and a coring method. Background technique [0002] Soft rocks are widely distributed in my country, and mudstone and shale alone account for about 50% of all rocks on the surface. With the rapid development of mine mining and major infrastructure construction in our country, soft rock formations are often exposed in engineering construction. Because soft rock softens and disintegrates obviously after being exposed to water, it has brought a lot of problems to mining and engineering construction. [0003] Therefore, research on the physical and mechanical properties of soft rock has become one of the hot issues in the field of geotechnical engineering, and laboratory testing is an important research method. [0004] At present, before indoor experiments, it is necessary to coring the rocks collected on site. When th...

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Problems solved by technology

[0006] In order to solve the problems of cuttings cleaning and drill bit cooling in the process of coring soft rocks, and at the same time ensure that the original structure and physical and mechanical properties of the cores are not damaged during the coring process, the present invention provides a method for large rocks in the laboratory. Anhydrous coring device, named: soft rock dry coring device

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