A flexible grinding device for weakly cemented rock specimens with penetrating fractures

Abstract

The invention belongs to the field of rock mechanics, and provides a flexible grinding device for weakly cemented rock specimens penetrating through fissures. A flexible grinding device for weakly cemented rock specimens penetrating through fractures, comprising: a base, a leveling assembly, an upper fixing assembly, a lower fixing assembly, a fastening connection assembly, and a specimen advancing assembly. The leveling assembly is rotatably connected with the base through an adjusting screw. The leveling component is fixedly connected with the lower fixing component. The upper fixing component is connected with the lower fixing component through a fastening connection component. The specimen advancing component is fixedly connected with the lower fixing component through the support frame. The device of the present invention reduces the negative effects of water and vibration on the rock specimen with weakly cemented penetrating cracks during the grinding process by setting water-proof rubber belts, springs and adjusting components, and improves the success rate and the grinding success rate of rock specimens with weakly cemented penetrating cracks. The test efficiency has the advantages of unique structure, reasonable structure, convenient operation, economy and durability.

Description

technical field [0001] The invention belongs to the field of rock mechanics, and in particular relates to a flexible grinding device for a rock specimen with weak cementation through fissures. Background technique [0002] Due to the inhomogeneity of crystallization and the effect of later geological tectonic stress, there are a large number of defects such as joints and fissures in the rock mass, and the cementation force between the filled fissures and the rock mass is very weak, resulting in a decrease in the tensile strength of the filled fissured rock mass. Even without the tensile strength, the compressive strength is only 10% to 50% of the intact rock. Field in situ tests can quantitatively study the mechanical behavior of fractured rock mass, but it is time-consuming and labor-intensive. Indoor tests can better reflect its mechanical behavior, and gradually become an effective method. The stress process of the weakly cemented through-fracture rock mass was simulate...

AI Technical Summary

Problems solved by technology

The conventional grinding device has the following disadvantages: no water-proof and shock-absorbing parts, the force applied to fix the specimen is not a flexible force, and the weak cement filling cracks are easily separated from the rock during the grinding process; there is no leveling part, and the end face of the rock specimen to be ground It is not parallel to the grinding disc, and the flatness of the end face of the rock specimen after grinding is difficult to meet the requirements of the relevant test specifications for rock mechanics

[0005] 1) There are no water-proof and shock-absorbing components, and the force applied to fix the specimen is not a flexible force, and the weakly cemented and filled cracks are easily separated from the rock during the grinding process;

[0006] 2) There is no leveling part, the end face of the rock specimen to be polished is not parallel to the grinding disc, and the flatness of the end face of the rock specimen after grinding is difficult to meet the requirements of the relevant test specifications for rock mechanics

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