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Penetrating jointed rock mass hydraulic fracturing extension destruction device and test method

A jointed rock mass and hydraulic fracturing technology, which is applied in the direction of measuring devices, using stable tension/pressure testing material strength, instruments, etc., can solve the problem of poor hydraulic pressure monitoring accuracy, the existence of test pieces, and the inability to adapt to test pieces Specifications and other issues, to achieve the effect of convenient operation of the device, ensuring the accuracy of water pressure, and increasing practical performance

Pending Publication Date: 2022-01-21
CHINA RAILWAY 14TH BUREAU GRP 1ST ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present disclosure is to provide a hydraulic fracturing expansion and destruction device and test method for penetrating jointed rock mass, so as to solve the problems in the prior art that the device cannot adapt to the specifications of the test piece, there is air in the test piece, and the joint rock mass cannot be destroyed. Problems such as poor accuracy of visualization and water pressure monitoring

Method used

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  • Penetrating jointed rock mass hydraulic fracturing extension destruction device and test method
  • Penetrating jointed rock mass hydraulic fracturing extension destruction device and test method
  • Penetrating jointed rock mass hydraulic fracturing extension destruction device and test method

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Embodiment 1

[0038] Such as Figure 1-Figure 3 As shown, this embodiment provides a typical through-joint rock hydraulic fracturing expansion and destruction device of the present disclosure, including a sealing fixture, and a water injection device that provides a set water pressure for the sealing fixture. The water outlet of the water injection device is provided with Water pressure monitoring sensor 19;

[0039] The sealing fixture comprises a bracket, and the bracket includes two symmetrically arranged rectangular frames and bolt rods 24 connecting the two rectangular frames, the rectangular frame includes a vertical strut 4 and a longitudinal strut 3, and the vertical strut 4 and the longitudinal strut 3 are all telescopic; the screw rod 24 has a set length, which is selected according to the size of the jointed rock mass specimen 1; the vertical support 4 and the longitudinal support 3 are respectively provided with a vertical adjustment bolt 7 and a longitudinal adjustment bolt 8, ...

Embodiment 2

[0052] This embodiment provides a test method based on the hydraulic fracturing expansion and destruction device for penetrating jointed rock mass in Embodiment 1, which is characterized in that it includes the following steps:

[0053] Step 1, place the jointed rock mass test piece 1 between two plexiglass flat plates 10, apply gel-like filler on the edge of the jointed rock mass test piece 1 and the organic glass flat plate 10, and fix the jointed rock mass test piece by the telescopic bracket 1 to dense state;

[0054] Step 2, connect the water outlet of the water injection device with the water injection port 2 of the sealing fixture through the water outlet pipe 21, use the stepping motor 13 to pump the pressurized water into the jointed rock mass test piece 1, open the exhaust water outlet 22, and The air in the sealing fixture is discharged, and then the exhaust water outlet 22 is blocked;

[0055] Step 3, collect the experimental data of hydraulic fracturing expansion...

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Abstract

The invention relates to a rock mechanics test device, in particular to a through jointed rock mass hydraulic fracturing extension destruction device which comprises a sealing clamp and a water injection device for providing set water pressure for the sealing clamp, and a water pressure monitoring sensor is arranged at a water outlet of the water injection device; the sealing clamp comprises a support, the support comprises two symmetrically-arranged rectangular frames and a bolt rod connecting the two rectangular frames, each rectangular frame comprises a vertical supporting column and a longitudinal supporting column, and the vertical supporting columns and the longitudinal supporting columns are telescopic. A flat plate is arranged on the vertical supporting columns and the longitudinal supporting columns of the rectangular frame on each side, a space for placing a jointed rock mass test piece is formed between the flat plates on the two sides, a water injection port is formed in one flat plate, and an exhaust water outlet is formed in the other flat plate. The technical scheme disclosed by the invention can be suitable for test pieces with different sizes, and ensures that no air exists in the test pieces during the test.

Description

technical field [0001] The disclosure relates to a rock mechanics test device, in particular to a hydraulic fracturing expansion and destruction device for penetrating jointed rock mass. Background technique [0002] The statements herein merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] Most of the rock mass structures in nature have micro-cracks, joints and cavities, and the rock masses are composed of various mineral components, resulting in differences in anisotropy of the rock mass structure, especially in underground engineering or high ground stress conditions. There is often a certain amount of fissure water inside the rock mass structure, which has a direct effect on the stability of the rock mass, and in tunnel excavation or deep underground mining activities, external load disturbances often affect the internal water pressure of the jointed rock mass , Most projects damage the rock mass d...

Claims

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Application Information

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IPC IPC(8): G01N3/12G01N3/02
CPCG01N3/12G01N3/02
Inventor 秦松陈云娟盛圣胜高涛杨帆李艳龙柯成林王乐宁刘吉昌刘效智
Owner CHINA RAILWAY 14TH BUREAU GRP 1ST ENG CO LTD
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