Method and device for making ground stress sensing column

A technology of ground stress and sensing column, applied in the direction of the mold, can solve the problem that the relative angle is difficult to obtain accurately, and achieve the effect of good consistency and calculation and measurement

Active Publication Date: 2016-03-30
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Since the broken and weak borehole wall has a certain influence on the pushing process, if the two pressure cells are pushed to the test point separately, it is difficult to obtain the relative angle accurately

Method used

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  • Method and device for making ground stress sensing column
  • Method and device for making ground stress sensing column
  • Method and device for making ground stress sensing column

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0026] Such as figure 1 , figure 2 , image 3 As shown, a device for making geostress sensing columns includes a mold base 7 and a mold upper cover 1 that are combined to form a cylindrical cavity. Both ends of the mold base 7 have slots 3 for inserting The baffle 2 and the rear baffle 5; there are connecting holes 6 on the two edges of the mold base, which can be fixed with the fixing frame 9 or the mold upper cover 1 through a mortise and tenon structure;

[0027] Positioning holes 4 are arranged on the fixed bracket 9, and the fixing head 14 is inserted into the positioning holes 4 to move up and down and rotate, and is fixed by bolts 13; the lower end of the fixing head 14 has a shape matching the apex of the three-way pressure box;

[0028] The front baffle 2 and the rear baffle 5 also have connecting holes 6, which are fixed with the positioning fra...

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Abstract

The invention discloses a device of producing a geostress sensing column for deep soft rock geostress test. The device comprises a die base and a die upper cover which are closed to form a cylindrical cavity. Two ends of the die base are provided with clamping grooves used for inserting front and rear retaining boards. Two edges of the die base are provided with connecting holes. The die base can be fixed to fixing racks or die upper cover through mortise and tenon structures. Each fixing rack is provided with a positioning hole. A fixing head is inserted into each positioning hole and can move up and down and rotate and is fixed through a fixing bolt. The lower end of each fixing head is in the shape matching with the apex of a sensor. Each of the front and rear retaining boards is provided with a connecting hole, and the front and rear retaining boards are fixed to a fixing rack through mortise and tenon structures. The positioning rack is provided with two central positioning lasers and two edge positioning lasers. Beams from the central positioning lasers can vertically pass the positioning holes of the fixing racks. The device can be used to produce the geostress sensing column with cement mortar by casting, spatial correlation of two three-dimensional pressure boxes can be accurately positioned, and geostress can be calculated and measured.

Description

technical field [0001] The invention belongs to the technical field of geotechnical measurement, and in particular relates to a method and a device for making an in-situ stress sensing column for in-situ stress testing in deep soft rock. Background technique [0002] The safe construction of coal mine roadways requires effective monitoring of the surrounding rock stress. In the broken and weak surrounding rock in the deep part of the coal mine, the commonly used hydraulic fracturing method and stress relief method cannot be effectively implemented. Wuhan Institute of Rock and Soil Mechanics, Chinese Academy of Sciences proposed a "deep soft rock ground stress test method and device based on the principle of rheological stress recovery" (patent 201210096644.6), which uses the rheological characteristics of deep soft rock under high ground stress to realize soft rock ground stress real-time and long-term monitoring. When measuring the ground stress, it is necessary to place ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B1/087
CPCB28B7/0029
Inventor 张程远刘泉声刘小燕陈怡筠朱元广蒋景东
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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