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Test device and method for simulating three-dimensional flow state of caving zone filling slurry

A test device and caving zone technology, applied to measuring devices, instruments, scientific instruments, etc., can solve problems such as polluting water bodies, prone to spontaneous combustion, and occupying land resources

Pending Publication Date: 2020-08-04
中煤能源研究院有限责任公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This kind of solid waste occupies land resources, is prone to spontaneous combustion and fire, and pollutes water bodies

Method used

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  • Test device and method for simulating three-dimensional flow state of caving zone filling slurry
  • Test device and method for simulating three-dimensional flow state of caving zone filling slurry
  • Test device and method for simulating three-dimensional flow state of caving zone filling slurry

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Embodiment

[0040] A mine in Shenmu, Northern Shaanxi mainly mines the 2# coal seam, with a buried depth of 150-200m, a dipping length of the working face of 200m, a dipping angle of the coal seam of 9°, and a caving zone height of 15.3-19.5m, with an average of 17.4m. The filling process of the working face is to carry out high-level and adjacent-level grouting filling in the goaf of the lagging working face, and the filling flow rate is 120m 3 / h.

[0041] 1) Determine that the model similarity ratio is 1:100, then the effective length of the slurry diffusion test box is 2000mm, and the baffle plate 22 may not be installed. According to the similarity ratio, the effective collapse zone height is determined to be 180mm, and the flow rate at the end of the filling pipe is controlled at 0.0012m 3 / h, the inclination angle of the coal seam is 9°;

[0042]2) Adjust the manual angle platform 6 of the bottom plate of the box so that the slurry diffusion test box 1 forms a 9° inclination with ...

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Abstract

The invention discloses a test device and method for simulating a three-dimensional flow state of a caving zone filling slurry. The test device is composed of a delivery pump, a slurry diffusion testbox body, a loading device and a monitoring system. Transparent stone bulk materials are uniformly stacked in the box body, the three-dimensional stacking form of a caving zone of a goaf is simulatedthrough the loading device, the slurry containing tracer particles is injected into the box body through a high-position grouting pipe or an adjacent-position grouting pipe in the conveying pump, andthe tracer particles scatter under the action of the laser device, so that the diffusion form of the slurry in the three-dimensional space along the accumulated cracks can be clearly observed, and images are collected at regular time through a high-definition wide-angle camera. The test method can be used for researching the three-dimensional diffusion rule of the filling slurry of the caving zoneof the goaf under the influence of different concentrations, different accumulation forms and different intervention positions. The method has a certain reference value for the basic theoretical research in the green mining fields of underground coal mine filling mining, goaf treatment and the like.

Description

technical field [0001] The invention relates to a test device and method for simulating the three-dimensional flow state of filling slurry in a caving zone, which is suitable for studying the accumulation form and flow law of filling slurry in gobs during filling mining in underground coal mines. Background technique [0002] In the process of large-scale production and utilization of coal resources in my country, a large amount of solid waste such as coal gangue and fly ash will be produced, with an output of about 800-1000 million tons per year. This kind of solid waste occupies land resources, is prone to spontaneous combustion and fire, and pollutes water bodies. At present, experts and scholars in the coal industry have begun to actively explore the goaf grouting technology after the solid waste slurry has been liquefied, that is, drilling through different positions such as the ground (high position), the adjacent roadway (adjacent position) of the goaf, and the end of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/00
CPCG01N13/00G01N2013/003
Inventor 朱磊朱树来王刚刘德春黄剑斌吴玉意古文哲赵萌烨张新福徐凯宋立平宋天奇
Owner 中煤能源研究院有限责任公司
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