Simple ultra-large-diameter coring drill core sample extraction device and coring method

Abstract

The invention relates to the technical field of the structure of a drilling sampling device, and particularly discloses a simple ultra-large-diameter coring drill core sample extraction device and a coring method. The simple ultra-large-diameter coring drill core sample extraction device comprises a core barrel, the core barrel is of a hollow cylindrical structure with two ends open, an upper endfixed to a drill pipe, and a cutting tooth block arranged at the lower end, the simple ultra-large-diameter coring drill core sample extraction device is characterized in that the core barrel is provided with a limiting structure; the limiting structure includes a barrel inner part located inside the core barrel and limiting a core from moving from top to bottom but not limiting the core from moving from bottom to top and a barrel outer part located outside the core barrel and used for fixing the barrel inner part to the core barrel. The coring device is simple in structure, convenient to operate, improvement on the original facility and device is small, the use cost is low, the coring device is suitable for extracting cores with large diameter, the using range is wide, and the coring device has great promotion value.

Description

technical field [0001] The invention relates to the technical field of drilling and sampling device structures, in particular to a simple ultra-large-diameter coring sample extraction device and a coring method. Background technique [0002] At present, there are two commonly used methods for the disposal of unstable and dangerous rock masses. One is blasting and clearing. In a restricted environment, there are many construction disturbances and high safety risks. The other is reinforcement treatment, which enhances the stability of dangerous rock masses by setting anchor cables or rail piles. sex, to prevent its collapse. The latter are safe and reliable in constrained environments and are increasingly used. However, when the anchor cable or rail pile reinforcement is used to deal with unstable and dangerous rock mass, it is necessary to drill the core to take the core, provide the anchor cable or rail pile installation and anchor foundation, and the anchor hole diameter r...

AI Technical Summary

Problems solved by technology

However, when the anchor cable or rail pile reinforcement is used to deal with unstable and dangerous rock mass, it is necessary to drill the core to take the core, provide the anchor cable or rail pile installation and anchor foundation, and the anchor hole diameter required for rail pile reinforcement is generally large , the combined rail pile even reaches 300mm, but the maximum core diameter of the common core drill is 136mm. If the core sample exceeds this value, the weight of the core sample is too large, and it is difficult to extract. The common core drill structure is relatively complicated, and the operation is extremely difficult. Troublesome, the cost of use is relatively high, so the conventional core drilling method is difficult to meet the construction requirements of rail piles

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