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

Gob-side entry retaining method using high-water material filling columns

A high-water material, empty entry retaining technology, applied in the fields of backfill, earthwork drilling, safety devices, etc., can solve the problems of difficult roof connection, low supporting strength of piers, etc., and achieves small underground auxiliary transportation and simple construction. , good for ventilation

Inactive Publication Date: 2013-01-02
CHINA MINING & CIVIL NEW MATERIAL SCI & TECH LTD
View PDF8 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is: use a spraying machine to fill sand and stone into the steel cylinder formwork together, and then install a vibrating device on the steel cylinder formwork to compact the sand and stone. The top is difficult, and the initial support strength is low, and the quality of pier columns is affected by many factors during construction

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
  • Gob-side entry retaining method using high-water material filling columns

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Such as figure 1 Shown, the construction steps of the present invention are as follows:

[0015] a. After the mining face is advanced, near the end hydraulic support 1, clean the floating coal and scum on the floor near the filling space to the solid floor, then build a high-water material filling column 2 at the predetermined position, and inject the high-water material slurry 2~3 single hydraulic props 3 are installed close to the filling column 2 in front.

[0016] b. Inject the homogeneously mixed high-water material slurry into the filling column 2 through the filling pump 5 and the delivery pipe 4 .

[0017] c. 4 hours after the high-water material slurry in the filling column is solidified, remove the corresponding single hydraulic prop 3.

[0018] d. Repeat the above steps, and make the next filling column after the working face advances for a certain distance.

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

A gob-side entry retaining method using high-water material filling columns belongs to the field of mine supports. With advancing of actual mining working faces, filling column structures are produced near end hydraulic supports at designed intervals, and two to three single hydraulic supports are fixed on the periphery of each filling column structure to assist forming of filling columns; and evenly-mixed high-water material slurry is filled into constructed filling column structures, and the single hydraulic supports are removed 4 hours after the filled slurry solidifies to finish construction of the filling columns. Road-side supports are formed by the filling columns in a row, the roadway is retained, and gob-side entry retaining is achieved. By the method, a huge amount of filling materials is saved, downhole auxiliary transport amount is low, and cost is low. The constructed filling columns are simple in construction and high in bearing capacity. An operator can operate below a top plate supported by bolt-mesh-cable in the roadway without entering a gob, and accordingly safety and reliability are high.

Description

technical field [0001] The invention relates to the technical field of mine roadway support, in particular to the field of coal mine mechanized roadside filling and gob-side roadway retaining support. Background technique [0002] Gob-side entry retention technology is a major breakthrough in my country's coal mine safety mining technology. The traditional gob-side entry retention of high-water material entry is to build a continuous filling wall behind the working face along the edge of the goaf to preserve the entryway and realize gob entry retention. With this method, the constructed filling wall has a large bearing capacity and a good maintenance effect. However, during construction, personnel need to go to the unsupported area of ​​the side roof of the gob for construction, which is very dangerous. The filling wall body of construction uses many materials, and cost is high. [0003] On August 6, 2010, the China Invention Patent Bulletin announced the invention applic...

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 Applications(China)
IPC IPC(8): E21F15/00
Inventor 柏建彪王襄禹陈勇谢伟徐营赵红超王俊
Owner CHINA MINING & CIVIL NEW MATERIAL SCI & TECH 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