Long-term bearing test monitoring device for large-size cuboid coal and rock sample

A monitoring device and cuboid technology, which are applied in the direction of measuring device, measuring force, and testing the strength of materials by applying stable tension/pressure to achieve the effects of convenient disassembly and assembly, wide practicability and simple structure

Active Publication Date: 2016-01-27
SHANDONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is currently no feasible monitoring technology and a complete monitoring system to assist in completing the test.

Method used

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  • Long-term bearing test monitoring device for large-size cuboid coal and rock sample
  • Long-term bearing test monitoring device for large-size cuboid coal and rock sample
  • Long-term bearing test monitoring device for large-size cuboid coal and rock sample

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Embodiment Construction

[0018] The present invention is described in detail below in conjunction with accompanying drawing and specific embodiment:

[0019] Such as figure 1 As shown, the monitoring device for the long-term bearing test of the large-size cuboid coal rock sample includes an upper platen 1, a bottom plate 2, a lateral restraint plate 3, an upper stress sensor positioning plate 4, a bottom stress sensor positioning plate 5, and a lateral stress sensor positioning plate. plate 6 and displacement sensor positioning plate 8, the upper platen 1 is arranged directly above the bottom plate 2, and the lateral limit restriction plate 3 is two pieces, which are arranged on the left and right sides of the bottom plate 2 and are fixed by fixing bolts 11. The lower surface of the upper platen 2, the inner surfaces of the two lateral restraint plates 3, and the upper surface of the bottom plate 2 are respectively provided with an upper stress sensor positioning plate 4, a side stress sensor position...

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Abstract

The invention discloses a long-term bearing test monitoring device for a large-size cuboid coal and rock sample, and relates to the technical field of rock mechanics tests. The long-term bearing test monitoring device comprises an upper pressing plate, a bottom plate, a lateral confinement restraining plate, an upper stress sensor locating plate, a bottom stress sensor locating plate, a lateral stress sensor locating plate and a displacement sensor locating plate. A space which is formed by the upper pressing plate, the bottom plate and the lateral confinement restraining plate and is approximately in a hexahedron shape is designed for monitoring the coal and rock sample to be tested. Stress sensors are arranged on the inner side face of the upper pressing plate, the inner side face of the bottom plate and the inner side face of the lateral confinement restraining plate respectively, displacement sensors are symmetrically arranged on the front side face and the rear side face of the whole device, the stress changes of different points of all non-free faces of the large-size cuboid coal and rock sample and the transverse deformation condition of different points of all free faces under long-term bearing are accurately tested, and then the mechanics characteristics and failure mode of the large-size cuboid coal and rock sample in the long-term bearing process are analyzed. High practicality is achieved.

Description

technical field [0001] The invention relates to the technical field of rock mechanics tests, in particular to a long-term bearing test monitoring device for large-size cuboid coal rock samples. Background technique [0002] Strip mining is a commonly used coal mining method. Only part of the coal in the coal seam is mined, and the remaining coal supports the overlying strata in the form of strip coal pillars, which can effectively inhibit the subsidence of the overlying strata in the stope and the surface Mobile, thereby protecting the ground ecological environment and facilities such as buildings and railways. Ensuring the long-term stability of striped coal pillars is beneficial to the safe production and economic development of mines, so it is necessary to study the mechanical properties and instability mechanism of striped coal pillars under long-term load. It is one of the important methods to study the instability mechanism of striped coal pillars by using large-size ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01L1/00G01B21/32
Inventor 陈绍杰朱彦屈晓任凯强刘勇郭赛郭宇航
Owner SHANDONG UNIV OF SCI & TECH
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