Rock confining pressure applying device achieved through connecting rod mechanism

Abstract

The invention discloses a rock confining pressure applying device achieved through a connecting rod mechanism. The rock confining pressure applying device comprises a loading plate, a horizontal amplitude changing mechanism, a fixed block mechanism, a heat collecting and conducting block and a heating element. The loading plate, the horizontal luffing mechanism and the fixed block mechanism are connected in sequence; a threaded connecting rod in the fixed block mechanism is embedded in the guide cylinder, and the tail section of the threaded connecting rod movably penetrates through the guidecylinder; the loading plate is over against the loading side surface of the upper part of the rock sample block and is connected with the rod end of the horizontal luffing mechanism through a higher pair; when the threaded connecting rod is fixedly connected with the guide cylinder at room temperature, the loading plate is in fit contact with the loading side surface; the heating element can heatthe screw from room temperature to a specified temperature by means of the heat collection and conduction block; and the loading plate is in contact with and extrudes the loading side surface at the upper part of the rock sample block by utilizing huge tensile force generated after the rod body is shrunk so as to generate a confining pressure effect with a given size. The device is simple in structure, stable, reliable, economical, practical, convenient to operate, capable of meeting the test precision requirement and suitable for various research fields of deep rock strata.

Description

technical field [0001] The invention belongs to the intersecting field of tunnel engineering and geotechnical engineering, and relates to a rock confining pressure applying device, in particular to a standard TBM hob (disc hob) realized by a connecting rod mechanism. The rock confining pressure application device used by the wire cutting test bench (hereinafter referred to as the TBM standard wire cutting test bench) is used to simulate the rock confining pressure state under various rock breaking conditions of the rock breaking tool. Background technique [0002] The rock mass existing in the formation, especially the natural rock mass in the deep rock stratum, has a certain in-situ stress (also called rock mass confining pressure) due to the influence of gravity, plate movement, and crustal contraction. The confining pressure of the rock mass affects the physical and mechanical properties of the rock itself, the rock breaking / destruction mechanism, etc., as well as the roc...

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Problems solved by technology

Furthermore, considering that some research topics related to deep rock formations need to simulate the state of rock lateral confining pressure, at the same time, a sufficient size of the rock surface to be cut should be reserved for cutting and breaking by tools, or pasting and laying out test equipment, etc. Moreover, a large number of relevant existing test benches do not have the ability to simulate confining pressure. Therefore, without changing the main structure of the original test bench, without additionally adding complex and huge hydraulic systems, and without using bath oil pressurization with high reliability and sealing requirements Under the premise of the method, an economically feasible device for applying rock confining pressure under various rock-breaking conditions of the rock-breaking tool obviously has huge economic effects and market potential.

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