WO2003069124A1 - Procede de deshydratation d'une matiere particulaire solide - Google Patents

Procede de deshydratation d'une matiere particulaire solide Download PDF

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Publication number
WO2003069124A1
WO2003069124A1 PCT/IB2003/000499 IB0300499W WO03069124A1 WO 2003069124 A1 WO2003069124 A1 WO 2003069124A1 IB 0300499 W IB0300499 W IB 0300499W WO 03069124 A1 WO03069124 A1 WO 03069124A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
particulate material
sub
outlet
bag
Prior art date
Application number
PCT/IB2003/000499
Other languages
English (en)
Inventor
Kelvin Robert Legge
Original Assignee
Kelvin Robert Legge
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kelvin Robert Legge filed Critical Kelvin Robert Legge
Priority to AU2003245068A priority Critical patent/AU2003245068A1/en
Publication of WO2003069124A1 publication Critical patent/WO2003069124A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/48—Chocks or the like
    • E21D15/486—Chocks or the like with essential hydraulic or pneumatic details

Definitions

  • THIS INVENTION relates to a method of dewatering a solid particulate material.
  • the invention extends to a method of dewatering a solid particulate material contained within a foraminous container, to a container for a solid particulate material, to a sub-terranean ground support installation and to a method of providing ground support.
  • the invention further relates to a drainage system for a sport facility and a method of draining water from a surface of a sport facility.
  • a method of dewatering a solid particulate material which method includes subjecting the solid particulate material to sub-atmospheric pressure.
  • the method may include applying a negative pressure to a drain line having an inlet positioned at a low level within the material.
  • the solid particulate material may be contained within a foraminous container, the method including providing an outlet in a wall of the container and applying the sub-atmospheric pressure across the outlet.
  • the method includes accelerating the dewatering of particulate material contained within a backfill bag by supplementing gravitational dewatering of the particulate material by applying a sub-atmospheric pressure to at least part of the material.
  • the method may include providing a conduit which leads from the container at or adjacent an operatively lower end thereof, the conduit defining an inlet and the outlet and a flow passage, connecting the inlet and the outlet in flow communication.
  • the container may be in the form of a backfill bag for containing waste or residue from mining, the bag having an inlet whereby the particulate material can be introduced into the bag.
  • a container for a solid particulate material which container includes a foraminous body and at least one conduit leading from the body, the conduit defining an inlet, an outlet and a flow passage, connecting the inlet and the outlet in flow communication.
  • the container may include connecting means for connecting an outlet of the conduit in flow communication with sub-atmospheric pressure supply means, such as, for example, in the form of a vacuum or venturi pump.
  • sub-atmospheric pressure supply means such as, for example, in the form of a vacuum or venturi pump.
  • the container is in the form of a backfill bag for containing waste or residue from mining, the bag having an inlet whereby the particulate material can be introduced into the bag and the conduit being positioned at or towards an operatively lower end of the bag.
  • the bag may be of a geotextile material, such as, for example, woven polypropylene tapes.
  • a sub-terranean ground support installation which includes at least one container containing particulate material disposed between a foot wall and a hanging wall of an underground excavation, the or each container defining at least one drainage outlet; and sub-atmospheric pressure supply means connectable to the at least one drainage outlet for draining liquid from particulate material contained in the container.
  • the at least one container may be in the form of a foraminous bag of geotextile material, the particulate material being waste mining material and the drainage outlet being positioned at or adjacent an operatively lower end of the container.
  • a method of providing support in a subterranean excavation which method includes the steps of providing at least one container between a foot wall and a hanging wall of the subterranean excavation; introducing particulate material in suspension into the or each container; and subjecting the particulate material to sub-atmospheric pressure thereby to facilitate dewatering of the particulate material via the at least one drainage outlet.
  • the at least one container may be in the form of a foraminous bag of a geotextile material, the particulate material being waste mining material and at least one drainage outlet may be defined in the container at or adjacent an operatively lower end thereof.
  • a drainage system which includes at least one sub-surface drainage conduit; and sub-atmospheric pressure supply means/vacuum means connected to the conduit for subjecting a sub-surface region to sub-atmospheric pressure.
  • the system may be installed at a sport facility and may include a network of drainage pipes disposed beneath a playing surface of the sport facility.
  • a method of draining water from a surface which method includes subjecting a sub-surface region to sub-atmospheric pressure.
  • the surface may be that of a sport facility.
  • Figures 1 A-D show a series of steps in a method of providing ground support in accordance with the invention
  • Figure 2 shows a sectional side view of a so-called “tailings” dam application of a method of dewatering a solid particulate material in accordance with the invention
  • FIG. 3 shows a schematic representation of a drainage system, for a sport facility, in accordance with the invention.
  • reference numeral 10 refers generally to a subterranean excavation in the form of a tunnel or stope in an underground mine, more particularly, in a deep-level gold mine.
  • the tunnel 10 is defined between an overhead hanging wall
  • the container 1 6 is in the form of a porous bag of a geotextile material, such as, for example, woven polypropylene tapes.
  • the bag 1 6 has a drainage outlet 1 8, the outlet 18 being defined at an end of a conduit 20 which leads from the bag 1 6.
  • the conduit 20 is provided by a length of pipe and defines an inlet 22, at an end 24 thereof disposed within the bag 1 6, the outlet 18, at its end 26 spaced from the end 24, and a flow passage (not shown), which connects the inlet 22 and the outlet 1 8 in flow communication.
  • the conduit 20 is typically made to lead from the bag 1 6 by forming a receiving opening, for receiving a length of pipe, in a wall of the bag 1 6 at an operatively lower end 26 of the bag 1 6 and inserting the end 24 of the pipe through the opening, to be located within the bag 1 6.
  • a fastener is then received over that part of the material of the bag 1 6 adjacent to the receiving opening and the pipe, respectively, to secure the pipe within the opening.
  • waste material from mining operations so-called "tailings” comprising a slurry of solid particulate material (e.g . soil, small stones and the like) in suspension in water, is pumped into the bag 16 so as to fill the bag 1 6 with slurry 28 ( Figure 1 A).
  • the tailings are to be dewatered and thereby converted from a slurry 28 to solid-state.
  • water from the tailings suspension percolates downwardly through the particulate material and drains from the bag 1 6 via pores of the woven material of which the bag 1 6 is formed and/or the outlet 18.
  • a region of aeration 30 i.e.
  • Sub-atmospheric pressure supply means for example, in the form of a vacuum or venturi pump (not shown), is connected to an end 26 of the conduit 20 defining the outlet 1 8 and a negative gauge pressure (sub-atmospheric pressure) is applied across the end 26 of the conduit 20.
  • the suction effect so-created tends to accelerate the drainage of water from the slurry 28 and the associated descent of the phreatic line X within the bag 1 6 from the operatively upper portion 32 of the bag 16 to the lower portion 36 thereof and eventually to a level of the foot wall 14.
  • the back-fill material contents of the bag are in a solid state and serve to support the hanging wall 1 2 which settles onto an operatively upper surface of the bag 1 6 ( Figure 1 D).
  • reference numeral 50 refers generally to a so-called “tailings" dam in which a method of dewatering a solid particulate material in accordance with the invention finds application.
  • the tailings dam 50 is typically designed to impound slurry waste from mining (tailings) behind a retaining wall 52 of the dam 50.
  • the retaining wall 52 is typically of a solid particulate material 54.
  • tailings are typically dumped via a hydro-cyclone 58 on a so-called "beach" 56 of the dam 50.
  • the tailings slurry comprises solid particles in suspension in water, which water, upon dumping of the tailings on the beach 56, may seep into the particulate material 54 of the adjacent retaining wall 52.
  • a conduit 60 extends outwardly from the retaining wall 52 at a low elevation, the conduit 60 defining an inlet 62, at an end 64 thereof disposed within the retaining wall 52, and an outlet 66, at an end 68 spaced from the end 64 of the conduit 60 and disposed outside of the retaining wall 52.
  • sub- atmospheric pressure supply means (not shown) is connected to the outlet 66 and the material of the retaining wall 52 is subjected to a negative guage pressure.
  • reference numeral 70 refers generally to a drainage system for a sport facility in accordance with the invention.
  • the system 70 includes a sub-surface drainage conduit 72 disposed below a surface 74 of a playing field 76 of the sport facility, such as, for example, a cricket field.
  • a layer of a geotextile material 73, in sheet form, is inserted between the surface 74 and the conduit 72.
  • the system 70 further includes sub-atmospheric pressure supply means (e.g. a venturi/vacuum pump) (not shown) connected to the conduit 72 for subjecting a sub-surface region 76 adjacent to the conduit 72 to sub-atmospheric pressure, thereby to enhance drainage of water from the region 76 and in turn from the playing surface 74, when required.
  • sub-atmospheric pressure supply means e.g. a venturi/vacuum pump
  • the Inventor believes that the methods of the invention will facilitate a more rapid drainage of liquid from a liquid saturated material than would occur under the influence of gravity alone. It is believed that the methods of the invention will in turn allow for more rapid "setting'VsoIidifying of particulate material in suspension thereby more rapidly to yield a support of the material. In its application to. the mining industry, this will permit more rapid forward penetration of a seam where support is provided at spaced apart positions in the direction of drilling as progress into the seam is made. Furthermore, it is believed that the invention will alleviate problems associated with the slow drainage of liquids which permeate load bearing structures of particulate material (such as, retaining walls of tailings dams), and compromise the integrity thereof, by accelerating the drainage of liquid therefrom. The Inventor believes that drainage of surface water from playing surfaces of cricket fields, golf courses or other sport facilities may be improved by use of a drainage system of and methods of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)

Abstract

La présente invention concerne un procédé de déshydratation d'une matière particulaire solide qui consiste à soumettre la matière à une pression sub-atmosphérique. Cette invention se rapporte également à un contenant (16) destiné à une matière particulaire solide qui comprend un corps foraminé et au moins un conduit (20) partant du corps et définissant une entrée (22), une sortie (18) et un passage d'écoulement reliant par le fluide, l'entrée (22) et la sortie (18). Cette invention concerne également une installation de support d'un sol souterrain, un procédé de support dans l'excavation souterraine et un système de drainage.
PCT/IB2003/000499 2002-02-15 2003-02-14 Procede de deshydratation d'une matiere particulaire solide WO2003069124A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003245068A AU2003245068A1 (en) 2002-02-15 2003-02-14 A method of dewatering a solid particulate material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2002/1318 2002-02-15
ZA200201318 2002-02-15

Publications (1)

Publication Number Publication Date
WO2003069124A1 true WO2003069124A1 (fr) 2003-08-21

Family

ID=27735425

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2003/000499 WO2003069124A1 (fr) 2002-02-15 2003-02-14 Procede de deshydratation d'une matiere particulaire solide

Country Status (2)

Country Link
AU (1) AU2003245068A1 (fr)
WO (1) WO2003069124A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110500132A (zh) * 2019-07-23 2019-11-26 中南大学 一种上行式空场嗣后废石胶结充填方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4704047A (en) * 1985-04-24 1987-11-03 Oy Wartsila Ab Land drainage system
EP0338626A2 (fr) * 1988-04-21 1989-10-25 Pannevis B.V. Procédé et dispositif pour enlever des liquides d'un mélange de solides et de liquides
DE19824453A1 (de) * 1998-05-30 1999-12-02 Klaus Schulte Dammmaterialbehälter aus Gewebe mit Hangendstützkonstruktion
WO2000009858A2 (fr) * 1998-08-14 2000-02-24 Fosroc International Limited Soutenement gonflable pour mines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4704047A (en) * 1985-04-24 1987-11-03 Oy Wartsila Ab Land drainage system
EP0338626A2 (fr) * 1988-04-21 1989-10-25 Pannevis B.V. Procédé et dispositif pour enlever des liquides d'un mélange de solides et de liquides
DE19824453A1 (de) * 1998-05-30 1999-12-02 Klaus Schulte Dammmaterialbehälter aus Gewebe mit Hangendstützkonstruktion
WO2000009858A2 (fr) * 1998-08-14 2000-02-24 Fosroc International Limited Soutenement gonflable pour mines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110500132A (zh) * 2019-07-23 2019-11-26 中南大学 一种上行式空场嗣后废石胶结充填方法
CN110500132B (zh) * 2019-07-23 2020-05-22 中南大学 一种上行式空场嗣后废石胶结充填方法

Also Published As

Publication number Publication date
AU2003245068A1 (en) 2003-09-04

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