A depth-controllable drilling device for rock specimens and its application method

Abstract

The invention discloses a depth-controllable rock sample drilling device and a utilization method. The problem about accurately drilling rock samples of different shapes is solved. The drilling devicecomprises a vertical rack, a drilling mechanism, an I-shaped slide mechanism, a caliper mechanism and a displacement mechanism, wherein pushing rods are arranged on a base of the vertical rack; the samples are fixed through the pushing rods; the pushing rods are provided with scales, so that the samples are accurately moved; clamping plates are arranged in front of the pushing rods; the clampingplates are changed to adapt to the samples of different shapes; and a through hole is formed in the center of the base of the vertical rack. According to the depth-controllable rock sample drilling device, holes of the processed samples are protected; stress springs are arranged in the slide mechanism, drilling force is controlled, and the drill sticking problem is avoided; and the outer surfacesof slides and the caliper mechanism are provided with scales, so that the drilling position and drilling depth are accurately controlled. The invention further discloses an operation method for drilling the rock samples of different shapes at different depths.

Description

technical field [0001] The invention relates to a rock test piece drilling device and a use method, in particular to a rock test piece drilling device with controllable depth and different shapes and a use method. Background technique [0002] A relatively large number of mines in my country have been mined below 1,000 meters, so dynamic disasters such as rock bursts have increased significantly, seriously restricting the safe and efficient mining of deep coal resources. Practice has shown that drilling pressure relief is an efficient measure for rock burst relief. The indoor research on the mechanism of drilling pressure relief provides a basis for better performance of drilling pressure relief on site; the circular roadway is a coal mine A commonly used roadway form, the indoor research on the internal deformation law of circular roadway and the mechanical characteristics of surrounding rock has important guiding significance for the selection of reasonable support paramet...

AI Technical Summary

Problems solved by technology

[0003] Existing treatment methods for test piece holes: one is to reserve holes in advance, that is, during the test piece production process, insert a smooth plastic or iron rod into the test piece mold, and pull it out after the material is solidified. The method requires that the rod must be kept in a vertical state until the material is solidified. During this process, the placed rod needs to be rotated continuously to prevent the rod and material from being difficult to pull out after solidification, which increases the difficulty of making the test piece. Time-consuming and labor-intensive; Another method is to use ordinary drilling equipment to drill the sampled or prepared specimens. This method is difficult to keep the drill pipe and the hole in a straight line during the drilling process, resulting in The diameter of the hole is different, and the depth of the drilling is difficult to accurately determine, and there are obvious limitations.

Ordinary drilling equipment cannot effectively control the speed and propulsion force of the drill pipe, and it is prone to drill sticking. Improper handling will destroy the integrity of the test piece in advance, resulting in deviations from the actual test results.

In addition, affected by the size of the test piece during the drilling process of the test piece, it is easy to cause damage to the hole and the surface of the test piece during the process of drilling through holes, and there is also the problem that the large amount of drilling dust affects the working environment

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