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

Construction Technology of Filling and Grouting in the Back Annulus of Gas Shaft Wall

A technology for vertical shaft and gas, which is applied in the field of grouting construction technology for the rear annulus of gas vertical shaft wall, can solve the problem of high engineering cost, and achieve the effects of reducing construction cost, shortening construction period and widening the scope of application.

Active Publication Date: 2018-06-19
BEIJING CHINA COAL MINE ENG CO LTD
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the disadvantage of the front shaft method is that the construction period is more than twice that of the raising drilling rig sinking method and the engineering cost is also particularly high. The advantage is that it is suitable for various formation conditions; When there is a large amount of water gushing out of the rock formation, the sealing of the lower port annulus and the backfilling of the gas pipe wall become major problems

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
  • Construction Technology of Filling and Grouting in the Back Annulus of Gas Shaft Wall
  • Construction Technology of Filling and Grouting in the Back Annulus of Gas Shaft Wall
  • Construction Technology of Filling and Grouting in the Back Annulus of Gas Shaft Wall

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.

[0033] Such as figure 1 As shown, this embodiment takes the gas drainage well of Shihao Mine of Chongqing Songzao Coal and Electricity Company as an example. The construction process of filling and grouting the annulus behind the gas shaft wall of the gas drainage shaft includes the following steps:

[0034] (A) Raise drilling rig drilling method is used to expand the wellbore into a wellbore with a diameter of 1.65 meters and a depth of 305.33 meters. The water inflow of the open hole rock formation in the wellbore is abo...

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 filling and grouting construction process for the annulus behind the wall of a gas shaft, which comprises the following steps: (A) excavating the gas shaft; (B) lowering the gas pipe; (C) blocking the bottom end of the annular space; (D) lowering the injection Grout pipe; (E) top water segmental grouting. The object of the present invention can not only effectively solve the problem of backfilling the gas pipe wall, but also further broaden the scope of use of the raise drilling rig, shorten the construction period of the gas shaft, reduce the overall construction cost of the gas shaft, and effectively solve the problem of annulus plugging and sealing of the gas shaft downhole port. Technical problems of gas pipe wall filling.

Description

technical field [0001] The invention relates to the field of well drilling, and more particularly relates to a filling and grouting construction technology for annulus behind the wall of a gas shaft shaft. Background technique [0002] In recent years, in response to the safety requirements of the National Coal Safety Supervision Bureau, high-gas mines must be pumped before mining. After the coal mine gas is collected from the coal seam, it is pumped to the ground by a large-diameter gas riser (the inner diameter of the pipe is about 1m), and then the gas is treated and applied. Among them, the installation of the gas riser and the filling behind the wall become the key projects. [0003] At present, there are two methods for the installation and construction of the gas riser, one is the raising drilling rig sinking method, that is, "raising drilling rig sinking method drilling + lifting the gas pipe and lowering the installation + lower port annulus sealing + gas pipe wall ...

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): E21D5/04
Inventor 刘志强荆国业高岗荣程守业徐广龙李俊峰
Owner BEIJING CHINA COAL MINE ENG CO LTD
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