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

Method and system for determining and penetrating underground coal gasification passage

A coal gasification and determination method technology, which is applied in coal gasification, underground mining, construction, etc., can solve the problems of low penetration efficiency of gasification channels, inability to penetrate gasification channels, and low penetration efficiency, so as to improve penetration efficiency and reduce The effect of small drilling investment and cost saving

Active Publication Date: 2009-05-06
ENN SCI & TECH DEV
View PDF0 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With this method, at least three wells need to be drilled to roughly determine the gasification channel, and the cost is relatively high; in addition, the penetration efficiency of the gasification channel determined by this method is low, and there are often gasification channels that cannot be penetrated and need to be re-determined When the gasification channel is penetrated again
Therefore, the method of determining and penetrating the gasification channel in the prior art has high cost and low penetrating efficiency

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
  • Method and system for determining and penetrating underground coal gasification passage
  • Method and system for determining and penetrating underground coal gasification passage
  • Method and system for determining and penetrating underground coal gasification passage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] The inventor of the present invention considers that there are often fissures in the coal seam, and the naturally formed fissures can provide effective penetration channels. Therefore, the embodiment of the present invention uses the cracks in the coal seam to select and penetrate the coal gasification channel. Specifically, the development direction of the cracks in the coal seam (ie, the direction of the cracks) can be determined according to the measured in-situ stress in the horizontal direction of the coal seam, and the direction of the coal gasification channel can be determined according to the development direction of the coal seam cracks. In this way, the development of coal gasification channels along the development direction of coal seams can make the gasification channels reach the same permeability, and the required external force is small, thereby improving the penetration efficiency of the gasification channels; or applying the same external force, you can I...

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 the field of underground coal gasification, in particular to a technology for ensuring and channeling a coal gasification tunnel. The invention provides a method and a system for ensuring and channeling the coal gasification tunnel, wherein the method comprises the following steps: measuring the crustal stress in the horizontal direction of a coal bed; ensuring the cranny developing direction of the coal bed according to the measured crustal stress in the horizontal direction; and ensuring the direction of the coal gasification tunnel according to the cranny developing direction of the coal bed. Because the cranny developing direction in the coal bed is ensured according to the crustal stress in the horizontal direction of the coal bed and the direction of the coal gasification tunnel is decided according to the cranny developing direction of the coal bed, when the coal gasification tunnel exploited along the cranny developing direction of the coal bed reaches the same permeability, the required external force is smaller so that the channeling efficiency of the gasification tunnel is improved.

Description

Technical field [0001] The invention relates to the field of underground coal gasification, in particular to a technology for determining and penetrating coal gasification channels. Background technique [0002] The clean and efficient use of coal is one of the major issues in the field of energy and environmental protection in the world today. At present, the domestic coal that can be dug down by workers only accounts for 11.43% of the coal resource reserves. For other coal resources, such as abandoned mines or uneconomical lignite or deep coal seams, they are not suitable for dispatching personnel to go down and excavate. It uses the method of underground coal gasification to mine and utilize coal resources. [0003] The underground coal gasification process requires coal seams to have high gas permeability. However, the natural permeability of coal seams is very poor, so it is necessary to pierce the gasification channel in the coal seam before proceeding with underground coal...

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): E21B43/295
Inventor 陈峰李俊高鹍刘洪涛
Owner ENN SCI & TECH DEV
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com