CN113250746B - Folding type reinforcing device and layered stoping method - Google Patents

Folding type reinforcing device and layered stoping method Download PDF

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Publication number
CN113250746B
CN113250746B CN202110754742.3A CN202110754742A CN113250746B CN 113250746 B CN113250746 B CN 113250746B CN 202110754742 A CN202110754742 A CN 202110754742A CN 113250746 B CN113250746 B CN 113250746B
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China
Prior art keywords
folding
rectangular
reinforcing
chamber
stoping
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CN113250746A (en
Inventor
曹帅
李佳建
黄智强
秦仕文
宋卫东
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University of Science and Technology Beijing USTB
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University of Science and Technology Beijing USTB
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00Methods or devices for placing filling-up materials in underground workings
    • E21F15/02Supporting means, e.g. shuttering, for filling-up materials
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C41/00Methods of underground or surface mining; Layouts therefor
    • E21C41/16Methods of underground mining; Layouts therefor
    • E21C41/22Methods of underground mining; Layouts therefor for ores, e.g. mining placers
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00Methods or devices for placing filling-up materials in underground workings
    • E21F15/02Supporting means, e.g. shuttering, for filling-up materials
    • E21F15/04Stowing mats; Goaf wire netting; Partition walls
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00Methods or devices for placing filling-up materials in underground workings
    • E21F15/08Filling-up hydraulically or pneumatically

Abstract

The invention discloses a folding reinforcing device and a layered mining method, wherein the folding reinforcing device comprises two rectangular reinforcing surfaces which are oppositely arranged and a connecting structure for connecting the two rectangular reinforcing surfaces, and the folding reinforcing device is an integrated structure made of an elastomer material, so that the rectangular reinforcing surfaces can stretch out and draw back along the length direction and the width direction, and the connecting structure can stretch out and draw back to increase and decrease the distance between the two rectangular reinforcing surfaces, thereby realizing the folding or unfolding of the folding reinforcing device. When the folding reinforcing device is used in layered stoping, the rectangular reinforcing surfaces on the two sides can enhance the overall stability of the filling body of the ore room, reduce the phenomenon that the filling bodies on the two sides are mixed into ores after caving in the stoping process of the ore pillar, effectively reduce the stoping dilution rate of the ore pillar, ensure the thorough treatment effect and obviously improve the safety of the stoping process of the ore pillar. The reinforcing device has the advantages of simple structure, low cost, light weight, foldability, convenient transportation and convenient construction.

Description

Folding type reinforcing device and layered stoping method
Technical Field
The invention relates to the technical field of mining, in particular to a folding reinforcing device and a layered stoping method.
Background
In the course of mining, the method often used is the upward cut and fill method. The upward layered filling method is from bottom to top layered stoping, each layer is divided into a chamber and a pillar, the chambers and pillars are arranged at intervals, the ore in the chamber is stoped first, the filling material is filled after stoping of the chamber is finished, then the pillar is stoped, the filling material is filled after stoping of the pillar is finished, the pillar is shifted to the previous layer upwards after filling is finished, and the filling body of the layer is used as a working platform for stoping of the previous layer. In the stoping process of the ore pillar, the two sides of the ore pillar are provided with filling bodies, and during rock drilling and blasting, the filling bodies on the two sides are easily affected by blasting action, so that the filling bodies are collapsed and mixed into collapsed ores, and finally dilution of the ores is caused.
Disclosure of Invention
Compared with the prior art, the folding reinforcing device and the layered stoping method provided by the invention can reduce the phenomenon that filling bodies on two sides are mixed into ores after caving in the stoping process of the ore pillar, and effectively reduce the stoping dilution rate of the ore pillar.
In order to solve the problems, the invention provides the following technical scheme:
in a first aspect, the present invention provides the folding reinforcement device, which includes two rectangular reinforcement surfaces arranged oppositely and a connection structure for connecting the two rectangular reinforcement surfaces, where the folding reinforcement device is an integrated structure made of an elastomer material, so that the rectangular reinforcement surfaces can be stretched in the length direction and the width direction, and the connection structure can be stretched to increase or decrease the distance between the two rectangular reinforcement surfaces, thereby implementing folding or unfolding of the folding reinforcement device.
In a second aspect, the present invention provides a layered mining method, comprising:
stoping the chamber;
after stoping of the chamber is finished, placing the folding reinforcing device in a folding state in the chamber gob, and unfolding the folding reinforcing device to enable the rectangular reinforcing surface to be in contact with two side walls of the chamber gob, wherein the length of the rectangular reinforcing surface is equivalent to the depth of the chamber gob; the folding reinforcement device is the folding reinforcement device provided in the first aspect;
pouring filling slurry in the goaf of the chamber;
and after the filling slurry is solidified, carrying out stoping on the ore pillar.
Compared with the prior art, the technical scheme of the invention at least has the following technical effects:
according to the scheme, after stoping of the chamber is finished, the reinforcing device under the folded state is placed in the goaf of the chamber and is completely unfolded, the filling slurry is poured to eliminate the empty stope of the chamber, and the stope is stoped after the filling of the chamber is finished, so that the construction process is very simple. Moreover, when the folding reinforcing device is used in layered stoping, the rectangular reinforcing surfaces on the two sides can enhance the overall stability of the chamber filling body, effectively reduce the caving phenomenon of the chamber filling body in the stoping process of the ore pillar, namely reduce the phenomenon that the filling bodies on the two sides are mixed into ore after caving in the stoping process of the ore pillar, effectively reduce the stoping dilution rate of the ore pillar, ensure the treatment effect to be more thorough and obviously improve the safety of the stoping process of the ore pillar. The folding type reinforcing device is an integral structure made of elastomer materials, so that the folding type reinforcing device has the advantages of simple structure, low cost, light weight, folding property, convenience for underground transportation and convenience for construction, and is not easy to impact and deform by filling slurry.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of an embodiment of a foldable reinforcement device in accordance with the present invention in an unfolded state;
FIG. 2 is a schematic view of an embodiment of the folding reinforcement device of the present invention in a folded state;
FIG. 3 is a schematic diagram of the foldable reinforcement device of the present invention after two rectangular reinforcement surfaces are stretched in a staggered manner;
FIG. 4 is a front view of FIG. 1;
FIG. 5 is a top view of FIG. 1;
FIG. 6 is a side view of FIG. 1;
FIG. 7 is a schematic view of a filled goaf in a chamber according to an embodiment of the present disclosure;
fig. 8 is a schematic diagram of a filled goaf of a chamber and a pillar to be mined according to an embodiment of the invention.
Reference numerals: 1. an ore body; 2. a folding reinforcement device; 3. a filling body formed after the filling slurry is solidified; 4. a chamber; 5. carrying out ore pillar; 6. filling the retaining wall; 21. a rectangular reinforcing surface; 22. a first strip-shaped connector; 23. a second strip-shaped connector; 24. a third strip connector; 25. a rectangular frame body.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In a first aspect, the present invention provides a foldable reinforcement device, as shown in fig. 1 to 6, wherein the foldable reinforcement device 2 includes two rectangular reinforcement surfaces 21 disposed opposite to each other and a connection structure for connecting the two rectangular reinforcement surfaces 21, and the foldable reinforcement device 2 is an integral structure made of an elastic material, so that the rectangular reinforcement surfaces 21 can be extended and contracted in a length direction and a width direction and the connection structure can be extended and contracted to increase or decrease a distance between the two rectangular reinforcement surfaces 21, thereby folding or unfolding the foldable reinforcement device 2.
The rectangular reinforcing surfaces 21 may be stretched or shrunk along the length direction of the rectangular reinforcing surfaces 21, as shown in fig. 1, which is a schematic diagram of two rectangular reinforcing surfaces 21 stretched along the length direction, and the length of the rectangular reinforcing surfaces 21 is greatly increased after stretching. Of course, the rectangular reinforcing surface 21 may also be stretched or compressed in the width direction of the rectangular reinforcing surface 21, thereby changing the width of the rectangular reinforcing surface 21. Of course, referring to fig. 1, it is also possible to enlarge the distance between the two rectangular reinforcing surfaces 21, while the connecting structure between the two rectangular reinforcing surfaces 21 is stretched. Referring to fig. 2, the distance between the two rectangular reinforcing surfaces 21 may also be compressed, in which case the connection between the two rectangular reinforcing surfaces 21 is compressed. That is, the connecting structure may be stretched or contracted so that the distance between the two rectangular reinforcing surfaces 21 is reduced or increased. By stretching or compressing, unfolding or folding of the folding reinforcement device 2 may be achieved. As shown in fig. 3, the two rectangular reinforcing surfaces 21 may also be offset and stretched, i.e., one rectangular reinforcing surface 21 is stretched upward and the other rectangular reinforcing surface 21 is stretched downward, thereby offsetting the two opposing rectangular reinforcing surfaces 21. It can be seen that the folding reinforcement device 2 can be stretched or contracted in multiple directions.
It will be appreciated that the foldable reinforcement device 2 can be folded or unfolded because the material used is an elastomer material and is integrally formed from the elastomer material, i.e. the foldable reinforcement device 2 is an integral structure made from the elastomer material.
In practice, the elastomeric material may be, but is not limited to, a thermoplastic polyurethane elastomer rubber.
In particular implementation, the folding reinforcement device 2 may be, but is not limited to being, fabricated from the elastomeric material by 3D printing techniques.
In a specific implementation, as shown in fig. 1 to 6, the connection structure may include a plurality of pairs of crossing bodies, each pair of crossing bodies includes two first strip-shaped connection bodies 22 arranged in a crossing manner, one first strip-shaped connection body 22 is used to connect an upper portion of one rectangular reinforcing surface 21 and a lower portion of another rectangular reinforcing surface 21, and the other first strip-shaped connection body 22 is used to connect a lower portion of one rectangular reinforcing surface and an upper portion of another rectangular reinforcing surface.
That is, two strip-shaped connecting bodies are arranged in a crossing manner, one is used for connecting the upper part of one rectangular reinforcing surface with the lower part of the other rectangular reinforcing surface, and the other is used for connecting the lower part of one rectangular reinforcing surface with the upper part of the other rectangular reinforcing surface, so that the connection of the two rectangular reinforcing surfaces is stable, and the folding and unfolding of the whole folding and reinforcing device 2 are not influenced.
In a specific implementation, as shown in fig. 1 to 4, the rectangular reinforcing surface 21 includes a rectangular frame 25, a plurality of second strip-shaped connectors 23 arranged in parallel in a first direction in the rectangular frame 25, and a plurality of third strip-shaped connectors 24 arranged in parallel in a second direction, where the first direction and the second direction are perpendicular to each other.
That is, the rectangular reinforcing surface 21 is a mesh surface, which is effective in reducing the collapse of the packing body 3 when blasting the pillar.
In a second aspect, the present application provides a method of stratified mining, the method comprising:
s110, stoping the chamber 4;
as shown in fig. 7 and 8, in the ore body 1, a ore pillar 5 is arranged in the middle of two ore rooms 4, and actually, the ore rooms 4 and the ore pillar 5 are alternately arranged.
S120, after stoping of the chamber is finished, placing 2 the folding reinforcing device in a folding state in the goaf of the chamber, and unfolding the folding reinforcing device to enable the rectangular reinforcing surface to contact two side walls of the goaf of the chamber; the folding reinforcement device is the folding reinforcement device provided in the first aspect;
after the stoping of the chamber is finished, the chamber becomes a goaf, the goaf of the chamber is called the chamber goaf, and the chamber goaf is provided with two oppositely arranged side walls, a rear wall and an opening. At the moment, the folding reinforcing device with the folding state can be placed in the goaf of the mineral house, then the folding reinforcing device is unfolded, the distance between the two rectangular reinforcing surfaces is stretched, the two rectangular reinforcing surfaces are contacted with two opposite side walls of the goaf of the mineral house, the two rectangular reinforcing surfaces are stretched along the length direction, the length of the rectangular reinforcing surfaces is equivalent to the depth of the goaf of the mineral house, and the length of the rectangular reinforcing surfaces is close to or equal to the depth of the goaf of the mineral house. Of course, it is also possible to stretch the two rectangular reinforcing surfaces in the width direction so that the width of the rectangular reinforcing surfaces corresponds to the height of the gob of the mine.
S130, pouring filling slurry in the goaf of the chamber;
the filling slurry may be, but is not limited to, a mixture of cement slurry and tail mortar.
After the filling slurry is solidified, the filling body 3 is formed.
Of course, it is also possible to provide a filling dam 6 at the opening of the gob of the house before S130 to prevent the filling slurry from flowing out of the gob of the house when the filling slurry is poured.
And S140, stoping the ore pillar after the filling slurry is solidified.
In the upward horizontal layered filling mining method, in order to reduce the stoping dilution rate of ore pillars, the invention arranges the reinforcing device in a folded state in the goaf of the chamber after the stoping of the chamber is finished, then the reinforcing device is completely unfolded, the empty stope area of the chamber is eliminated by pouring filling slurry, and the ore pillars are stoped after the filling of the chamber is finished, thus the construction process is very simple. Moreover, when the folding reinforcing device is used in layered stoping, the rectangular reinforcing surfaces on the two sides can enhance the overall stability of the chamber filling body, effectively reduce the caving phenomenon of the chamber filling body in the stoping process of the ore pillar, namely reduce the phenomenon that the filling bodies on the two sides are mixed into ore after caving in the stoping process of the ore pillar, effectively reduce the stoping dilution rate of the ore pillar, ensure the treatment effect to be more thorough and obviously improve the safety of the stoping process of the ore pillar. The folding type reinforcing device is an integral structure made of elastomer materials, so that the folding type reinforcing device has the advantages of simple structure, low cost, light weight, folding property, convenience for underground transportation and convenience for construction, and is not easy to impact and deform by filling slurry.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (6)

1. A folding reinforcing device is placed in a goaf of a mine room after the stoping of the mine room is finished, and is characterized in that the folding reinforcing device comprises two rectangular reinforcing surfaces which are oppositely arranged and a connecting structure for connecting the two rectangular reinforcing surfaces, and the folding reinforcing device is an integrated structure made of an elastomer material, so that the rectangular reinforcing surfaces can stretch in the length direction and the width direction, and the connecting structure can stretch to increase or decrease the distance between the two rectangular reinforcing surfaces, and the folding or unfolding of the folding reinforcing device is realized; when the folding reinforcing device is unfolded, the rectangular reinforcing surface is in contact with two side walls of the goaf of the mineral house, and the length of the rectangular reinforcing surface is equivalent to the depth of the goaf of the mineral house;
the connecting structure comprises a plurality of pairs of crossing bodies, each pair of crossing bodies comprises two first strip-shaped connecting bodies which are arranged in a crossing manner, one first strip-shaped connecting body is used for connecting the upper part of one rectangular reinforcing surface and the lower part of the other rectangular reinforcing surface, and the other first strip-shaped connecting body is used for connecting the lower part of one rectangular reinforcing surface and the upper part of the other rectangular reinforcing surface;
the rectangular reinforcing surface comprises a rectangular frame body, a plurality of second strip-shaped connectors arranged in parallel along a first direction in the rectangular frame body and a plurality of third strip-shaped connectors arranged in parallel along a second direction, wherein the first direction is vertical to the second direction.
2. The reinforcement device of claim 1, wherein the elastomeric material is a thermoplastic polyurethane elastomer rubber.
3. The reinforcement device of claim 1, wherein the foldable reinforcement device is fabricated from the elastomeric material by 3D printing techniques.
4. A method of stratified mining, comprising:
stoping the chamber;
after stoping of the chamber is finished, placing the folding reinforcing device in a folding state in the chamber gob, and unfolding the folding reinforcing device to enable the rectangular reinforcing surface to be in contact with two side walls of the chamber gob, wherein the length of the rectangular reinforcing surface is equivalent to the depth of the chamber gob; the folding reinforcement device is the folding reinforcement device according to any one of claims 1 to 3;
pouring filling slurry in the goaf of the chamber;
and after the filling slurry is solidified, carrying out stoping on the ore pillar.
5. The method of claim 4, wherein the fill slurry is a mixture of cement slurry and a tail mortar.
6. The method of claim 4, wherein prior to said pouring of fill slurry within said chamber gob, said method further comprises:
and arranging a filling retaining wall at an opening of the goaf of the chamber to prevent the filling slurry from flowing out of the goaf of the chamber when the filling slurry is poured.
CN202110754742.3A 2021-07-05 2021-07-05 Folding type reinforcing device and layered stoping method Active CN113250746B (en)

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Application Number Priority Date Filing Date Title
CN202110754742.3A CN113250746B (en) 2021-07-05 2021-07-05 Folding type reinforcing device and layered stoping method

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Application Number Priority Date Filing Date Title
CN202110754742.3A CN113250746B (en) 2021-07-05 2021-07-05 Folding type reinforcing device and layered stoping method

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CN113250746B true CN113250746B (en) 2021-10-15

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2186607A (en) * 1986-02-14 1987-08-19 British Reinforced Concrete Eng Co Ltd Mine roof support pack for cementitious filling
RU2106494C1 (en) * 1995-08-16 1998-03-10 Уральский государственный экономический университет Method for handling overburden earth
RU2323339C2 (en) * 2006-05-16 2008-04-27 Станислав Александрович Кариман Face equipment assembly
CN102116164A (en) * 2011-01-23 2011-07-06 湖南科技大学 Temporary supporting device for roadway drifting
CN103758522A (en) * 2014-01-23 2014-04-30 郑东风 Temporary support method of tunneling working face and equipment thereof
CN107013229A (en) * 2017-05-26 2017-08-04 新疆大学 Folding telescopic gob side entry retaining roadside packing Flexible formwork assembly and its construction method
CN111535862A (en) * 2020-04-30 2020-08-14 山东科技大学 Folding and unfolding type quick plugging device for trapezoidal roadway
CN112727539A (en) * 2021-04-02 2021-04-30 北京科技大学 Construction method for filling false roof by using shrinkable mesh material

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2186607A (en) * 1986-02-14 1987-08-19 British Reinforced Concrete Eng Co Ltd Mine roof support pack for cementitious filling
RU2106494C1 (en) * 1995-08-16 1998-03-10 Уральский государственный экономический университет Method for handling overburden earth
RU2323339C2 (en) * 2006-05-16 2008-04-27 Станислав Александрович Кариман Face equipment assembly
CN102116164A (en) * 2011-01-23 2011-07-06 湖南科技大学 Temporary supporting device for roadway drifting
CN103758522A (en) * 2014-01-23 2014-04-30 郑东风 Temporary support method of tunneling working face and equipment thereof
CN107013229A (en) * 2017-05-26 2017-08-04 新疆大学 Folding telescopic gob side entry retaining roadside packing Flexible formwork assembly and its construction method
CN111535862A (en) * 2020-04-30 2020-08-14 山东科技大学 Folding and unfolding type quick plugging device for trapezoidal roadway
CN112727539A (en) * 2021-04-02 2021-04-30 北京科技大学 Construction method for filling false roof by using shrinkable mesh material

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