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Method for quickly constructing stress-saturated protolith crustal stress test standard part

A test standard, ground stress technology, applied in the preparation of test samples, force/torque/work measuring instruments, force sensors in the holes of the force-bearing structure, etc., can solve the problem that the test accuracy and accuracy cannot be guaranteed, and It can solve the problems of long sampling time, etc., to achieve the effect of promising prospects, avoiding stress dissipation, and reducing test difficulty and cost.

Active Publication Date: 2020-11-27
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for rapidly constructing stress-saturated original rock in-situ stress test standard parts, which can solve the problems that the sample preparation time is long and the test accuracy and accuracy cannot be guaranteed, and the original rock samples on site can reach The saturation time is shortened to 3-5 days; the diversity of stress transmission paths is realized; the state of the original rock sample on site can be accurately measured, and the existing in-situ stress test method can be tested

Method used

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  • Method for quickly constructing stress-saturated protolith crustal stress test standard part
  • Method for quickly constructing stress-saturated protolith crustal stress test standard part
  • Method for quickly constructing stress-saturated protolith crustal stress test standard part

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Experimental program
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Effect test

Embodiment 1

[0041] Such as figure 1 , figure 2 and image 3 As shown, when the ground stress test method needs to be tested in the horizontal direction:

[0042] A method for rapidly constructing stress-saturated in-situ stress test standard parts, the method comprising the following steps:

[0043] Step 1: Select sandstone rock mass 13 in situ on site, and prepare site original rock sample 1;

[0044] The method is as follows: select a sandstone rock mass 13 in situ at the site, dig a working face with a certain depth around the sandstone rock mass 13, and obtain the original rock sample 1 on site;

[0045] After making the original rock sample 1 on site, a canopy 2 is built above the rock sample.

[0046] Step 2: Drill the main stress hole 4 and the monitoring auxiliary hole 5 on the original rock sample 1 at the site. The depth of the stress main hole 4 and the monitoring auxiliary hole 5 are both 3 meters. The layout of the stress main hole 4 and the monitoring auxiliary hole 5 ...

Embodiment 2

[0062] Such as figure 1 and Figure 4 As shown, when the ground stress test method needs to be tested in the horizontal direction:

[0063] The layout of the stress main hole 4 and the monitoring auxiliary hole 5 in step 2 can also be: the number of the stress main hole 4 is two, which are set at 1 / 3 and 2 / 3 of the central axis of the upper surface of the original rock sample 1 on site , the number of monitoring auxiliary holes 5 is multiple, with each stress main hole 4 as the center, surrounding the stress main hole 4 in a plurality of circles uniformly arranged.

[0064] All the other steps are the same as in Embodiment 1.

Embodiment 3

[0066] Such as figure 1 and Figure 5 As shown, when it is necessary to verify the ground stress test method in the vertical direction,

[0067] In step 2, the layout of stress main hole 4 and monitoring auxiliary hole 5 is as follows: the number of stress main hole 4 is one, which is set in the center of the side surface of the original rock sample 1 on site, and the number of monitoring auxiliary holes 5 is multiple. The hole 4 is the center and is evenly arranged in a plurality of circles around the main stress hole 4 .

[0068] All the other steps are the same as in Embodiment 1.

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Abstract

The invention discloses a method for quickly constructing a stress-saturated protolith crustal stress test standard part. The method comprises the following steps that 1, a field protolith sample is prepared; 2, a stress main hole and a monitoring auxiliary hole are drilled; 3, a plurality of auxiliary hole pressure sensors are evenly arranged; 4, color marking is conducted on each stress main hole, and a plurality of main hole pressure sensors are evenly arranged in each stress main hole in the hole depth direction; 5, each stress main hole is backfilled; 6, a constraint boundary layer of thelateral confinement stiffness rock-like material is formed; and 7, stress locking components are installed on the other faces, except the face where the stress main hole and the monitoring auxiliaryhole are located, of the field protolith sample. The technical problem to be solved by the invention is to provide a method for quickly constructing the stress-saturated protolith crustal stress teststandard part, and the method can solve the problems that the sample preparation time is long and the test precision and accuracy cannot be ensured.

Description

technical field [0001] The invention relates to the technical field of in-situ stress testing of in-situ rocks, in particular to a method for rapidly constructing stress-saturated in-situ in-situ stress test standard parts. Background technique [0002] At present, after the original rock is extracted from the site, the stress saturation state changes and the original characteristics are lost. However, the existing large-scale rock mass stress saturation structural device takes a long time for the rock mass to reach stress saturation, which takes 30 to 100 days left and right, and the setting of the horizontal principal stress is very simple. At the same time, the current in-situ stress test methods are all based on the tests under the previously unknown stress state, and the precision and accuracy of the tests need to be studied. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for rapidly constructing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01L5/00
CPCG01N1/28G01L5/0004
Inventor 刘杰唐洪宇徐曜冬邹迅陈凯谢晓康李洪亚石谦李政杜卓兴李运舟杨浩宇
Owner CHINA THREE GORGES UNIV
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