Brazilian disc splitting test device and method under simulated hydrostatic pressure conditions
A technology of hydrostatic pressure and Brazilian disc, applied in the direction of measuring device, applying stable tension/pressure to test the strength of materials, instruments, etc., can solve problems such as the inability to answer the influence of hydrostatic pressure on the tensile strength of rocks
Inactive Publication Date: 2020-01-03
NORTHEASTERN UNIV
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Problems solved by technology
Similarly, hydrostatic pressure also has a non-negligible effect on the tensile strength of rock, but the traditional Brazilian disc tensile test has never involved hydrostatic pressure conditions, so it is impossible to answer the influence of hydrostatic pressure on the tensile strength of rock
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[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0025] Such as figure 1 , 2 As shown, a Brazilian disk splitting test device under simulated hydrostatic pressure conditions includes a pressure chamber 1, a cover 2, a load cell 3, a pressure pad 4 and a load transmission column 5; the pressure chamber 1 adopts Cylindrical structure, the pressure chamber 1 is vertically arranged and the top is open, the cover 2 adopts a disc-shaped structure, the cover 2 is installed at the top opening of the pressure chamber 1, the gap between the cover 2 and the pressure chamber 1 The space is fixedly connected by several fastening bolts 6, and a sealing ring 7 is installed between the cover 2 and the pressure chamber 1; the load cell 3 is fixed at the center of the inner bottom of the pressure chamber 1, and the pressure pad The block 4 is fixed on the top of the load cell 3, and the lower circu...
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The invention provides a Brazilian disc splitting test device and method under simulated hydrostatic pressure conditions. The device comprises a pressure chamber, a seal cover, a force measuring sensor, a bearing cushion block and a load transfer column, wherein the load transfer column vertically passes through the seal cover; and an upper arc pressure plate, a disc rock sample, a lower arc pressure plate, the bearing cushion block and the force measuring sensor are sequentially arranged between the load transfer column and a bottom plate of the pressure chamber from top to bottom. The methodcomprises the steps of preparing the disc rock sample and gluing the disc rock sample for sealing; transferring the device into a universal testing machine, connecting the load transfer column and apressed oil-cylinder piston rod of the universal testing machine and temporarily lifting the seal cover; clamping the glued and sealed disc rock sample between the upper arc pressure plate and the lower arc pressure plate; arranging a displacement sensor between the load transfer column and the bearing cushion block; sealing the pressure chamber; filling the pressure chamber with oil and applyingoil pressure to simulate the hydrostatic pressure conditions; applying load to the disc rock sample through the universal testing machine and completing the Brazilian disc splitting tests under the hydrostatic pressure conditions; and calculating the tensile strength of the disc rock sample under the hydrostatic pressure conditions.
Description
technical field [0001] The invention belongs to the technical field of Brazilian disc splitting test, in particular to a Brazilian disc splitting test device and method under simulated hydrostatic pressure conditions. Background technique [0002] The tensile strength and compressive strength of rock are important parameters for evaluating the stability of underground engineering rock mass and underground stope, and are also input parameters for deep rock mass engineering design. As the depth continues to increase, problems such as rock bursts and core cakes are gradually exposed, and the failure forms of rocks are becoming more and more complex, and more tensile and shear failure forms of key parts appear. Previous studies focused on the triaxial compressive strength of rocks, but less attention was paid to the tensile strength tests of rocks. [0003] The tensile failure test of rock is divided into two categories: direct test and indirect test. In the direct tensile tes...
Claims
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Login to View More IPC IPC(8): G01N3/10G01N3/02
CPCG01N3/02G01N3/10G01N2203/0017G01N2203/0067G01N2203/023G01N2203/0246G01N2203/0258G01N2203/0282G01N2203/0682
Inventor 张希巍夏昌张晓俊周晃石磊
Owner NORTHEASTERN UNIV