Drilling system for weak cemented rock test piece

Abstract

A drilling system for a weak cemented rock test piece comprises a radial drill, a clamp, a sealed connection device, a dust suction device, an air guide pipe, an air gathering cover, a volume adjusting valve and an air blower, wherein the clamp is arranged on a platform of the radial drill, the air blower is arranged on one side of the radial drill, a drill rod of the radial drill adopts a hollow structure, the lower end of the drill rod is coaxially connected with a drill barrel, the sealed connection device located above the drill barrel is arranged outside the drill rod, a baffle located above the drill barrel is arranged in the drill rod, an air outlet of the air blower is connected with one end of the air guide pipe through the air gathering cover, the other end of the air guide pipe is connected with the sealed connection device, and an air outlet of the sealed connection device communicates with the inner wall of the drill rod; the volume adjusting valve is arranged on the air guide pipe. Drill blocking caused by accumulation of chippings in the weak cemented rock standard sample machining process is effectively avoided, the unfavorable phenomenon of drilling is avoided, the intactness of the test piece can be ensured in an air cooling mode, dust suction in the field is performed, and dust pollution to the working environment is avoided.

Description

technical field [0001] The invention belongs to the technical field of weakly cemented rock research experiments, and in particular relates to a drilling system 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 meetin...

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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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