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Method and device for similar simulation test of coal seam water injection

A technology of coal seam water injection and similar simulation, applied in the direction of measuring devices, fuel oil testing, material inspection products, etc., can solve problems such as poor dust suppression effect, and achieve the effect of improving service life

Active Publication Date: 2022-02-22
CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the purpose of this application is to provide a method and device for a similar simulation test of coal seam water injection. By performing a similar water injection experiment on a large sample of briquette coal, the experimental wet radius B is determined. Ⅰ Carry out water injection experiments to determine the similarity ratio A of water injection, and then determine the actual water injection influence radius C=B×A, which can truly reflect the actual water injection situation on site and solve the problem of poor dust suppression effect caused by poor on-site water injection effect

Method used

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  • Method and device for similar simulation test of coal seam water injection
  • Method and device for similar simulation test of coal seam water injection
  • Method and device for similar simulation test of coal seam water injection

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Embodiment 1

[0052] see Figure 1 to Figure 7, a method for similar simulation tests of coal seam water injection. Firstly, according to the field coal seam water injection experience, the empirical wetting radius and / or the empirical water injection pressure range are determined, and the similarity ratio is determined, so as to calculate the laboratory water injection pressure value; Similar coal samples are crushed into powder from the on-site coal samples to make shaped coal samples, and the actual confining pressure on the site is selected to simulate the water injection environment, and combined with the use of nuclear magnetic resonance technology, the same confining pressure and water injection are carried out with raw coal samples and briquetted coal samples Contrast test of pressure parameter conditions, test wetting speed, find the similarity ratio of influence of similar model coal and raw coal under the same water injection environment, and then calculate the actual wet range on...

Embodiment 2

[0081] see Figure 2 to Figure 7 , a device for similar simulation tests of coal seam water injection, comprising a compact coal compaction device 1 and a hydraulic anti-permeability system 2; The water injection pipe 14; the mold box 11 is provided with the avoidance hole of the water injection pipe 14, the avoidance hole is a waist-shaped hole, the center of the avoidance hole coincides with the side center of the mold box 11, one end of the mold box 11 is open, and the transfer beam 13 is arranged on The opening of the mold box 11; the peripheral support box 12 has a cavity matched with the mold box 11 circumferential direction, the mold box 11 is located in the cavity of the peripheral support box 12, and the open end is upward, and the peripheral support box 12 is also There is an avoidance hole for the water injection pipe 14; the hydraulic anti-reflection system 2 includes a pump station 23 connected to the water injection pipe 14, the pump station 23 is connected with ...

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Abstract

The invention relates to a method and device for a similar simulation test of coal seam water injection, which belongs to the technical field of coal seam water injection. The method for the similar simulation test of coal seam water injection includes the following steps: S1 Determine the empirical wetting radius or empirical water injection pressure range according to the on-site coal seam water injection experience, and then determine The similarity ratio of the experimental conditions; S2 determines the coal sample size specification for the similar simulation experiment according to the similarity ratio of the experimental conditions; S3 makes the small raw coal sample I, the small coal sample I and the large coal sample; S4 performs similar water injection on the large coal sample Experiment, determine the experimental wet radius B; S5 through the water injection experiment on the small sample of raw coal I and the small sample of briquette I, determine the water injection similarity ratio A; S6 inversion of the actual water injection on site: the actual water injection influence radius on site C = B × A. The invention can truly reflect the actual water injection situation on site, and solves the problem of poor dust suppression effect caused by poor water injection effect on site.

Description

technical field [0001] The invention belongs to the technical field of coal seam water injection, and relates to a method and a device for a similar simulation test of coal seam water injection. Background technique [0002] Dust hazard has always been the focus of prevention and control in the process of coal mining, which not only seriously endangers the physical and mental health of coal miners, but also has a great impact on the safety of coal mine production. [0003] Coal seam water injection for dust suppression is the most active and effective coal mine comprehensive dust control measure. Coal seam water injection is to inject pressure water into the coal seam by drilling a number of holes in the coal body before the coal seam is mined, so that the water is evenly distributed in the cracks and pores of the coal, so that the coal body is moistened and the ability to generate floating dust is reduced. [0004] At present, the main methods of research on coal seam wate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/22
CPCG01N33/222
Inventor 陈芳李德文张设计胥奎马威袁地镜吴国友黎志杨俊磊杨桐庄学安冉川莫金明邹常富
Owner CHINA COAL TECH & ENG GRP CHONGQING RES INST CO LTD