Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Closed goaf mashgas three-dimensional seepage simulation device and simulation method thereof

A technology of seepage simulation and goaf, which is applied in the direction of material inspection, fuel oil testing, etc., can solve the problems that simulated rock formations cannot be reused, and the distribution characteristics of goaf permeability are uncontrollable, etc., and achieve light weight, low density, and easy operation. Time-saving and labor-saving effect

Active Publication Date: 2015-09-09
CHINA UNIV OF MINING & TECH
View PDF0 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The shortcomings of using this method or the points that need to be improved are: (1) If materials such as gypsum, calcium carbonate, river sand, mica powder and coal powder are used as similar materials for each rock formation, the formed goaf has a permeability distribution. (2) During the mining process of the simulated working face, once the simulated rock formation collapses and is damaged, it cannot be reused; (3) The existing semi-closed goaf gas seepage simulation experimental device cannot be used to seal the gas in the goaf. Seepage simulation, the gas seepage simulation device in the closed goaf has not yet been made public

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Closed goaf mashgas three-dimensional seepage simulation device and simulation method thereof
  • Closed goaf mashgas three-dimensional seepage simulation device and simulation method thereof
  • Closed goaf mashgas three-dimensional seepage simulation device and simulation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] Below in conjunction with embodiment the present invention is further described.

[0030] Such as figure 1 , figure 2 , image 3 A gas three-dimensional seepage simulation device in a closed goaf is shown, which includes a sealed box 1, a permeability control system, a gas release system, a gas drainage system and a data acquisition system;

[0031] A plurality of piston cylinders 3 are embedded on the top cover plate of the sealed box 1, and the permeability control system includes a cylinder array composed of the plurality of piston cylinders 3. The area below the piston cylinders 3 Filled with high-resilience sponge 4 as a porous medium material for simulating gobs, the sealed box 1 area below the piston cylinder 3 is provided with adjacent gas release layer I11, adjacent gas release layer II12 and coal gas from top to bottom Release layer 13.

[0032] The size of the sealed box 1 is scaled down according to the actual size of the goaf. The sealed box 1 is tight...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a closed goaf mashgas three-dimensional seepage simulation device and a simulation method thereof, and belongs to the technical field of closed goaf mashgas seepage simulation. The device comprises a sealed box body, a permeability rate control system, a mashgas release system, a mashgas exhausting and mining system and a data acquisition system. The interior of the sealed box body adopts a high-rebound sponge for simulating a porous medium in a closed goaf; a cylinder array applies the pressure on the high-rebound sponge for controlling a distribution characteristic of the goaf permeability rate; methane is injected into different horizons of the sealed box body by the mashgas release system, to simulate different mashgas release sources; a steel slim tube is used for simulating a ground drilling well, and a wind speed sensor, a pipeline pressure sensor and a methane concentration sensor are adopted for monitoring the mashgas exhausting and mining amount and the mashgas exhausting and mining concentration of the simulated drilling well; a barograph and a methane concentration recorder are arranged for monitoring the gas pressure and the mashgas concentration of the interior of the simulated goaf. The device and the method can change a simulation scheme according to actual conditions, and have universal applicability.

Description

technical field [0001] The invention relates to a gas seepage simulation device and a simulation method thereof, belonging to the technical field of gas seepage simulation in closed goafs. Background technique [0002] In coal mining operations, with the continuous advancement of the coal mining face, the overlying coal strata behind the working face continue to sink and break, forming a goaf. There are two types of goafs: semi-closed goafs and closed goafs. The semi-closed goaf always exists behind the coal mining face during mining, and is connected with the mine ventilation system; the closed goaf refers to the goaf where the movement of the overlying strata is stable after the working face is closed, and is isolated in the mine. outside the ventilation system. Within the scope of the goaf, mining pressure relief gas is continuously desorbed and released, and accumulates in large quantities in the goaf. During the normal mining of the working face, part of the gas accu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N33/22
Inventor 秦伟许家林胡国忠朱怡然
Owner CHINA UNIV OF MINING & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products