A method to determine the pre -exhausting gas bandwidth of the coal mining of the coal mine

A technology for mining working face and gas strip, applied in measuring devices, instruments, scientific instruments, etc., can solve the problem of large error in the predicted value of gas emission, and achieve the effects of low cost, easy capture and easy operation.

Active Publication Date: 2017-08-18
SOUTHWEST PETROLEUM UNIV +2
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

China's coal mines are widely distributed, and the coal formation and occurrence conditions of coal are very different. Since there is no way to directly measure this parameter, we can only use different coal qualities to estimate the width of the roadway pre-drainage gas belt, which leads to the predicted value of gas emission in this coal seam. large error

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
  • A method to determine the pre -exhausting gas bandwidth of the coal mining of the coal mine
  • A method to determine the pre -exhausting gas bandwidth of the coal mining of the coal mine
  • A method to determine the pre -exhausting gas bandwidth of the coal mining of the coal mine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for measuring the width of the pre-drainage gas belt in a roadway of a coal mine mining face, comprising the following steps:

[0026] 1. Calibrate the gas injection drilling position

[0027] Select the roadway 2 in the mining area closest to the planned mining face 1 as the construction site for gas injection drilling, mark the entrance 4 of the planned working face along the groove, start from the entrance 4 of the planned working face along the groove 3, and follow the direction of the roadway in the coal mining area Mark the first gas injection borehole 9 at a distance of 10m, and then calibrate a gas injection borehole every 1m, that is, the second gas injection borehole 8, the third gas injection borehole 7, the fourth gas injection borehole 6, the Five gas injection drilling holes 5, a total of 5 gas injection drilling holes.

[0028] 2. Drilling, cementing and sealing in the hole:

[0029] Ordinary drilling rigs are used to construct gas injection dr...

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 relates to a method for measuring the widths of the tunnel gas pre-discharge zone of a coal mine working face.The method is characterized in that in a mining-area tunnel closest to the working face, 5 gas injecting holes are constructed starting from a position 10m away from a crossheading entrance, the depths of the holes are respectively 40m, 35m, 25m and 20m, and cement is injected into the holes to seal the same; tracer gas SF6 is injected into the gas injecting holes, measuring is continuously performed for 300 days at the 5 testing points through SF6 testers, and the widths of the tunnel gas pre-discharge zone of the coal seam of a coal mine at different tunnel exposure time are obtained according to the relation graph of measured data.The method has the advantages that the blank of the method for measuring the widths of the tunnel gas pre-discharge zones of different coal mines at different coal seam tunnel exposure time is filled up, the features of stable diffusion and easiness in capture of the tracer gas SF6 are utilized, the widths of the coal seam tunnel gas pre-discharge zone are measured accurately while the normal production of the coal mine is unaffected, the method is simple to operate, low in cost, capable of measuring the widths by the technical capacity of the coal mine, and quite good in economical efficiency and universality.

Description

technical field [0001] The invention relates to the field of prediction of gas emission in a coal mine mining face, in particular to a method for measuring the width of a roadway pre-discharging gas belt in a mining face. Background technique [0002] Gas prevention technology in coal mine mining face includes two aspects: gas emission prediction and gas drainage. Only by judging the different sources and quantities of gas through gas emission prediction can gas drainage be effectively guided. The main sources of gas in the production process of the coal mining face are: the local coal seam, adjacent layers and surrounding rocks, among which the gas in the local coal seam is the main source that affects safe production. Coal mines must predict the amount of gas emission in the coal seam before mining, so as to carry out targeted gas drainage measures. [0003] China's coal mines adopt the national standard "Coal Mine Gas Emission Prediction Specification" (AQ1018-2006) for ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/00
CPCG01N33/0004
Inventor 雷云刘建军张哨楠张伟王海东吴琼孙亮王军梁中秋杜旭
Owner SOUTHWEST PETROLEUM UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap