Rock confining pressure application device implemented by utilizing link mechanism

Abstract

The invention relates to a rock confining pressure application device. The rock confining pressure application device comprises a loading plate, a horizontal luffing mechanism, a block fixing mechanism, a heat collection and heat conduction block and a heating element; the loading plate, the horizontal luffing mechanism and the block fixing mechanism are sequentially connected; a threaded connection rod in the block fixing mechanism is embedded in a guide barrel, and the tail segment of the threaded connection rod movably passes through the guide barrel; the loading plate directly faces a loading lateral surface of the upper part of a rock test sample block and is connected with the rod end of the horizontal luffing mechanism by a higher pair; when the threaded connection rod is in fastened connection with the guide barrel at the room temperature, the loading plate is in attached contact with the loading lateral surface; the heating element can heat a screw rod to a specific temperature from the room temperature by the heat collection and heat conduction block; and by utilizing a huge tensile force generated after a rod body is contracted by heat, the loading plate is in contact with and squeezes the loading lateral surface of the upper part of the rock test sample block so as to generate a given size of confining pressure action. The rock confining pressure application deviceis simple in structure, stable, reliable, economic, practical and convenient and rapid to operate, meets the requirement for test accuracy and is applicable to each research field of a deep rock stratum.

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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