Cemented filling close to back processing technology for goaf at barren rock filling background

A technology for cemented filling and goaf, which is used in filling materials, mining equipment, and earth-moving drilling and mining, etc., can solve the problems of fine grain size, poor permeability, serious shrinkage and deformation of all tailings, and achieves the best results. The effect of low economic cost

Inactive Publication Date: 2013-10-16
SHANDONG UNIV OF TECH
View PDF5 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The full tailings filling body formed by natural dehydration will suffer from serious settlement and deformation after being subjected to pressure. The particle size of the full tailings is relatively

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
  • Cemented filling close to back processing technology for goaf at barren rock filling background
  • Cemented filling close to back processing technology for goaf at barren rock filling background
  • Cemented filling close to back processing technology for goaf at barren rock filling background

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Weigh the iron tailings and glue solid powder on the ground surface according to the mass ratio of 6:1, put them into the mixer and mix them evenly, then calculate the amount of water added based on the total amount of materials added, put them into the mixer with a metering pump, and mix them so that the mass concentration is 51 % of filling slurry; the well-stirred filling slurry is transported downhole through the existing filling pipeline.

[0048] On the plane of -280m underground iron ore goaf, according to the calculation of the flow velocity of 51% of the filling slurry pipeline and the coagulation time determined by the small test, it is determined to add metering pumps, mixing barrels, accelerator storage tanks and 80m away from the goaf The filling slurry transported to the downhole through the filling pipeline enters the mixing tank, and at the same time, the liquid sodium aluminate quick-setting agent is added through the metering pump and the addition ratio...

Embodiment 2

[0052] Weigh the iron tailings and glue solid powder on the ground surface according to the mass ratio of 6:1, put them into the mixer and mix them evenly, then calculate the amount of water added based on the total amount of materials added, put them into the mixer with a metering pump, and mix them so that the mass concentration is 51.4 % of filling slurry; the well-stirred filling slurry is transported downhole through the existing filling pipeline.

[0053] In the plane where the mined-out area is -220m underground, according to the calculation of the flow rate of the filling slurry pipeline of 51.4% and the setting time determined by the small test, it is determined to add a metering pump, a mixing tank, an accelerator storage tank and a connection at a distance of 90m from the mined-out area. Pipeline, the filling slurry transported to the downhole through the filling pipeline enters the mixing tank, and at the same time, the liquid sodium aluminate quick-setting agent is...

Embodiment 3

[0057] Weigh the iron tailings and glue solid powder on the ground surface according to the mass ratio of 6:1, put them into the mixer and mix them evenly, then calculate the amount of water added based on the total amount of materials added, put them into the mixer with a metering pump, and mix them so that the mass concentration is 51 % of filling slurry; the well-stirred filling slurry is transported downhole through the existing filling pipeline.

[0058] In the plane where the mined-out area is -280m underground, according to the calculation of the flow velocity of the filling slurry pipeline of 51% and the coagulation time determined by the small test, it is determined to add a metering pump, a mixing tank, an accelerator storage tank and a connection at a distance of 100m from the mined-out area. Pipeline, the filling slurry transported to the downhole through the filling pipeline enters the mixing tank, and at the same time, the liquid sodium aluminate quick-setting age...

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 provides a cemented filling close to back processing technology for a goaf at the barren rock filling background and belongs to the technical field of mining engineering. The cemented filling close to back processing technology for the goaf at the barren rock filling background is characterized in that iron tailings and cementation powder are used as filling slurry, and the filling slurry is delivered to underground through an existing filling tube; liquid sodium aluminate accelerator which is, by mass, 7% of the cementation powder are added into a stirring bucket which is arranged on the plane of the goaf, the slurry is delivered to an overflowing pool which is built on the front edge of the goaf through a tube, the slurry takes advantages of the situation when plug flow is formed and slides into the goaf, the slurry entering the goaf loses liquidity in a short time and coagulates, and therefore bottom pavement is achieved; low-cement-sand ratio slurry is used for filling the close to back, and filling is finished, wherein the cement-sand ratio of the low-cement-sand ratio slurry is 1:10-1:12. The cemented filling close to back processing technology for the goaf at the barren rock filling background achieves rapid coagulation of the slurry, reduces the flow resistance of the tubes, the phenomenon that the slurry flows out under the condition that no sealing wall is arranged is avoided, the filling close to back effect is good, strength is high, and technology implementation cost is low.

Description

technical field [0001] The invention relates to a technique for treating a goaf with cemented filling and roofing under the background of waste rock filling, which belongs to the technical field of mining engineering, and specifically relates to a cemented filling and roofing technique. Background technique [0002] With the progress of underground mining, a large number of goafs have been formed. As a major underground danger source, the existence of goafs has brought great safety hazards to mine production safety, and also seriously threatened the living and production of surrounding residents and the surrounding environment. With the prolongation of the exposure time of the goaf, the stability is greatly reduced, which will induce major geological disasters such as rock avalanche, slippage, and surface subsidence, so it needs to be dealt with in time. [0003] Filling and roofing treatment The filling material in the goaf is generally a mixed slurry of waste rock and / or t...

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): E21F15/00
Inventor 郑怀昌肖超吕会元王栋李明张晓君武文治
Owner SHANDONG UNIV OF TECH
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