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A kind of whole mining process and ground stability test device and method in goaf subsidence area

A stability test, collapse zone technology, applied in the direction of using stable tension/pressure to test material strength, measuring device, strength characteristics, etc. Less research and other issues to achieve the effect of real-time monitoring

Active Publication Date: 2022-07-05
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the commonly used test devices for goaf research can monitor the deformation and stress of the foundation, there are still the following problems to be solved: First, most of the existing devices are aimed at the study of the stability of the foundation within the range of the goaf after mining. There are few studies on foundation deformation and stability in China; secondly, although the visual model slot combined with photographing technology is used to monitor the deformation of the goaf, it is impossible to obtain continuous deformation monitoring of the foundation soil within the entire observation window; in addition, for foundation filling During the support of the goaf during the process, rubber air cushions are often used as temporary supports for the goaf. However, since the air cushion is a flexible material, it will inevitably produce irregular deformation, which is inconsistent with the modulus of the surrounding foundation filling, making the goaf prone to occurrence. The initial deformation, and the bottom of the current test device is fixed, so it is impossible to simulate the uneven settlement of the bottom of the gob

Method used

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  • A kind of whole mining process and ground stability test device and method in goaf subsidence area
  • A kind of whole mining process and ground stability test device and method in goaf subsidence area
  • A kind of whole mining process and ground stability test device and method in goaf subsidence area

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Experimental program
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Effect test

Embodiment 1

[0040] This embodiment provides a whole mining process and a ground stability test device in a goaf subsidence area, including a model tank, a similar filling 21 for foundation soil, a loading device, a data acquisition system, a sand showering device, a sand filling recovery device, and a sand showering device And the sand filling recovery device constitutes a goaf filling and recovery device, and the model groove is arranged in the support frame.

[0041]Further, the model slot adopts a cuboid structure, and its size can be set according to the actual test requirements. The top of the model slot is an opening, and its front and rear sides are tempered glass. Several rows of reference points 13 are set on the tempered glass on the front side; the left and right sides of the model slot are steel plates. In this embodiment, the reference points 13 are arranged in five rows, each row having a plurality of them.

[0042] The bottom of the model groove is formed by splicing a plu...

Embodiment 2

[0072] This embodiment provides a whole mining process and a method for testing the stability of ground in a goaf subsidence area, using the device described in Embodiment 1, including the following steps:

[0073] The shape of the gob 14 is determined according to the on-site geological conditions or research content of the gob, and the size and burial depth of the gob 14 are determined in combination with the similarity ratio design.

[0074] According to the on-site rock stratum strength and similarity ratio of the goaf 14, the modulus of the similar filler 21 of the foundation soil, the design of the mix ratio of similar materials and the compactness of the sand pouring in the goaf are determined.

[0075] Install the model tank, connect the model tank with the bottom beam 22 and the vertical beam 10; set the position and number of the sand leakage pipes 15 according to the size and shape of the goaf 14, close the switch 16, and place the sand collecting box 17 at the same ...

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Abstract

The invention discloses a whole mining process and a ground stability test device and method in a goaf subsidence area. On the inner side of the frame, a height-adjustable reaction force beam is installed on the top of the support frame, and the reaction force beam is connected to a sand showering device or a loading device; a sand filling recovery device is arranged at the bottom of the model tank; Two adjacent support plates are connected together and an electric lifting rod is installed at the bottom, and the lifting and lowering of the supporting plate is controlled by the electric lifting rod to realize the simulation of foundation uplift or settlement. The invention realizes the real-time monitoring of the foundation displacement of the whole goaf and its surrounding foundation soil in the process of mineral mining and the goaf being loaded, and can realize the uneven settlement of the bottom of the goaf caused by earthquake loads and the like, and the impact on the upper subgrade soil. and experimental simulation of surface impacts.

Description

technical field [0001] The invention relates to the field of mining engineering, in particular to a whole mining process and a ground stability test device and method in a goaf subsidence area. Background technique [0002] my country is a country with large mineral resources, which are rich in variety and widely distributed. With the continuous development of the economy, the demand for mineral resources is also increasing. Except for a small number of open-pit mines, most of the mineral resources, especially coal resources with abundant reserves, are located underground, and have the characteristics of large depth range and complex geological environment. During the mining process, due to the sudden release of in-situ stress, the foundations at the top of the goaf are subsidence and deformed, especially in areas with relatively broken strata, if the support is not timely, it is easy to induce collapse accidents. In addition, after the mining of minerals, there are a larg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/06G01N3/12
CPCG01N3/06G01N3/12G01N2203/0003G01N2203/0019G01N2203/0042
Inventor 宋修广李怀剑庄培芝程俊伟岳红亚孔令弟崔文杰杨功增杨鹤张建亮
Owner SHANDONG UNIV
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