CN112727539A - Construction method for filling false roof by using shrinkable mesh material - Google Patents
Construction method for filling false roof by using shrinkable mesh material Download PDFInfo
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- CN112727539A CN112727539A CN202110363031.3A CN202110363031A CN112727539A CN 112727539 A CN112727539 A CN 112727539A CN 202110363031 A CN202110363031 A CN 202110363031A CN 112727539 A CN112727539 A CN 112727539A
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- filling
- mesh
- false roof
- stope
- construction
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- 239000000463 material Substances 0.000 title claims abstract description 87
- 238000010276 construction Methods 0.000 title claims abstract description 44
- 239000002002 slurry Substances 0.000 claims abstract description 16
- 238000005516 engineering process Methods 0.000 claims abstract description 6
- 239000004677 Nylon Substances 0.000 claims description 7
- 229920001778 nylon Polymers 0.000 claims description 7
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 7
- 238000010146 3D printing Methods 0.000 claims description 5
- 238000007796 conventional method Methods 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000004642 transportation engineering Methods 0.000 claims 1
- 238000005065 mining Methods 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 27
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 15
- 230000003014 reinforcing Effects 0.000 description 11
- 238000005452 bending Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000007906 compression Methods 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 210000000614 Ribs Anatomy 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
Abstract
The embodiment of the invention discloses a construction method for filling a false roof by using a shrinkable mesh material, and belongs to the technical field of filling mining. The method comprises the steps of firstly, manufacturing a shrinkable mesh material, after the last layered ore is mined, placing the mesh material in a compressed state on one side of a stope, fixing one end of the mesh material, dragging the other end of the mesh material to the other side of the stope, fixing the stretched mesh material in the stope, and finally filling the whole goaf with filling slurry; when the next layer of ore is mined, the filling body reinforced by the net material in the previous layer is used as a filling false roof. The technology of the invention has the advantages of simple construction, low labor intensity of workers, low cost, reliable quality of filling the false roof and the like; the method has important significance for quickly and conveniently constructing the filling false roof and realizing quick layer transfer of mining by a downward access filling method.
Description
Technical Field
The invention belongs to the technical field of filling mining, and relates to a construction method for filling a false roof by using a shrinkable mesh material.
Background
At present, the construction method of the filling false roof is to weave and bundle a reinforcing mesh with certain specification on site in the stope approach, and then carry out the procedures of approach retaining wall closing, slurry filling and the like to form the artificial filling false roof. Obviously, the mode needs a plurality of technical workers to carry out long-time construction operation in the downward access, the safety risk is high, the field construction time of the reinforcing mesh is long, and the improvement of the comprehensive production capacity of the stope is limited. This method has limitations in down-cut fill mining.
Most of the recent construction methods for filling false roofs are that a large number of anchor cables and anchor rods are constructed on surrounding rocks and top plates on two sides, and a large number of reinforcing steel bars are laid, so that the hinging process of the anchor cables and the reinforcing steel bars is complex, the labor intensity of workers is high, time and labor are consumed, and the construction method is not economical and practical.
Especially, the construction method of filling the false roof is that a reinforcing mesh is paved at the bottom of the upper layer, anchor rods or anchor cables are constructed at two sides and connected with the reinforcing mesh at the bottom through hanging ribs, and finally high-strength filling body slurry is poured. The construction method of the filling false roof needs to firmly hinge a large amount of reinforcing steel bar nets, a welding process is added when necessary, the construction method is complex, a plurality of technical workers need to perform construction operation in a downward access for a long time, and the labor intensity of the workers is high. In addition, the consumption of a large number of reinforcing meshes leads to a sudden increase in the construction cost of the filling false roof.
For example: the invention provides a rapid low-cost artificial false roof construction method for an underground mining mountain, which is provided by the patent CN103291305B and has the advantages of scientificity, reasonability, large bearing capacity, low construction cost, safe and reliable use and the like. However, in the method, a large number of anchor cables and anchor rods need to be constructed on the surrounding rocks and the top plates on the two sides, a large number of reinforcing steel bars need to be laid, and the process of hinging the anchor cables and the reinforcing steel bars is complex.
The patent CN105545353B proposes an artificial false roof construction method based on paste filling, which has the advantages of low construction cost, high safety of filling false roof and the like. However, in the implementation process of the method, a large amount of steel bars need to be laid, the construction process is complex, and the labor intensity of workers is high.
The method for pseudo-roof pillar shrinkage stoping and subsequent filling mining provided by the patent CN108661646B has the advantages of high safety of constructed pseudo-roofs and the like, but the construction process of the pseudo-roofs needs to be carried out by laying a large amount of reinforcing steel bars, the laying process is time-consuming and labor-consuming, and in addition, the cost of used high-strength concrete is high.
The patent CN111561318A proposes a method for constructing artificial false roof capable of realizing pre-supporting effect, which has the advantages of low mining cost, high safety of workers, etc. However, in the false roof construction method, a large number of steel bars need to be laid at the bottom, and in addition, a diagonal brace and an anchor rod need to be arranged, wherein the steel bar hinging process and the welding process are time-consuming and labor-consuming, the labor intensity of workers is high, and the construction method is complex.
The method for constructing the downward access filling mining false roof, which is proposed by the patent CN 109595016A, has the advantages of high false roof bearing capacity and long roof control time, but the method needs to lay a large number of reinforcing steel bars and connect upper and lower reinforcing steel bar meshes, the construction process is complex, the reinforcing steel bar hinging process is complex, and the labor intensity of workers is high.
In summary, in view of the problems of long cycle, high labor intensity, complicated construction and the like existing in the existing filling false roof construction, the application creatively provides a method for filling a false roof by using a shrinkable mesh material, so that the filling false roof construction is convenient and efficient, and is beneficial to large-scale popularization and use in the mining industry.
Disclosure of Invention
The invention solves the technical problems of long period, high labor intensity, complex construction and the like existing in the conventional filling false roof construction.
In order to solve the technical problems, the invention provides a construction method for filling a false roof by using a shrinkable mesh material, which comprises the steps of firstly manufacturing the shrinkable mesh material, after the last layered ore is mined, placing the mesh material in a compressed state on one side of a stope, fixing one end of the mesh material, dragging the other end of the mesh material to the other side of the stope, fixing the stretched mesh material in the stope, and finally filling the whole goaf by using filling slurry; when the next layer of ore is mined, the filling body reinforced by the net material in the previous layer is used as a filling false roof.
Preferably, the shrinkable mesh material is prepared by 3D printing technology according to the height, width and depth of the last layered ore stope.
Preferably, the mesh material is prepared by conventional techniques according to the height, width and depth of the last layered ore stope.
Preferably, the mesh material is rubber, common resin or nylon.
Preferably, the step of preparing the mesh material by the 3D printing technology comprises:
(1) establishing a mesh material model by using software, wherein the shape of the model is the same as that of the goaf, the model is cuboid, the length of the model is 20-30 m, the width of the model is 3-9 m, the height of the model is 3-5 m, and the side length of a single grid is 50-100 cm;
(2) and importing the mesh material model into a 3D printing program, and printing the model by using a 3D printer. The material of the printed model includes rubber, general resin, nylon, and the like.
Wherein: the tensile strength of the rubber is 15-20 MPa, the elongation is 500-520%, the compressive strength is 33-40J/m, the Poisson ratio: 0.1 to 0.3. The bending strength of the common resin is 60-70 MPa, the elongation (fracture) is 6-9%, the impact strength is 23-39J/m, the Poisson ratio: 0.4 to 0.45. The nylon has a tensile strength of 40-50 MPa, an elongation (break) of 30-40% and an impact strength of 10-15J/m.
Preferably, both ends of the mesh material are respectively fixed by fixing structures at both sides of the stope.
Preferably, one side of the stope is provided with a filling retaining wall to fill the whole goaf with filling slurry.
Preferably, a plurality of expansion screws or short anchor rods are arranged above the stretched mesh material and below the ore body, a pulley guide groove is arranged at the lower part of each expansion screw or short anchor rod, and a PVC filling pipe for conveying filling slurry is arranged in each pulley guide groove.
Preferably, the web material comprises an expanded state for filling with slurry and a compressed state for transport and storage.
Preferably, the expansion screws or the short anchor rods are arranged in a straight line, and the number of the PVC filling pipes is 1 or more.
Preferably, the side view direction figure and the front view direction figure of the expanded state of the mesh material are both composed of a plurality of diamonds.
The technical scheme provided by the embodiment of the invention at least has the following beneficial effects:
the invention provides a material for reinforcing a filling body by using a contractible structure and a filling false roof construction method, aiming at the problems that the construction of a manual false roof is complex and the labor intensity of workers is high in the prior art. The material has high strength and strong contractibility, and compared with the laying of a reinforcing mesh, the material is used only by being unfolded and fixed on two sides in a stope without being hinged and welded by a large number of workers, so that the material has the remarkable advantages of simple construction mode and reduction of the labor intensity of the workers. In addition, the material can be used as a framework to be placed in the filling body, so that the compression strength and the bending strength of the filling body are increased, the stability of the filling false roof is greatly improved, and the safety of the mining process is guaranteed.
In conclusion, the invention omits the process of laying a large amount of reinforcing steel bar nets in the existing filling false roof construction process, changes the laying of the reinforcing steel bar nets into the process of reinforcing the upper filling body by using the shrinkable material as the framework, and reduces the hinging and welding work in the process of laying the reinforcing steel bars. Meanwhile, the material is used as a framework, so that the strength of the filling body of the previous layer is greatly increased, and the safety of the ore mining process of the next layer is obviously improved.
Therefore, the technology of the invention has the advantages of simple construction, low labor intensity of workers, low cost, reliable quality of filling the false roof and the like; the method has important significance for quickly and conveniently constructing the filling false roof and realizing quick layer transfer of mining by a downward access filling method.
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 structural view of a shrinkable web material of the present invention, wherein a is in an expanded state and b is in a compressed state;
FIG. 2 is a schematic view of a goaf structure in a filling process in the construction method for filling a false roof by using a shrinkable mesh material according to the present invention;
FIG. 3 is a front view of a goaf structure after filling in the construction method for filling a false roof with a shrinkable mesh material according to the present invention;
FIG. 4 is a side view of a filled goaf structure in the method for constructing a false roof by using a shrinkable mesh material.
The reference numerals are explained below:
1-a web material;
2-ore body;
3-expansion screw or short anchor rod;
4-a pulley guide groove;
5-PVC filling pipe;
6-filling a retaining wall;
7-filling the slurry.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a construction method for filling a false roof by using a shrinkable mesh material, which comprises the steps of firstly manufacturing the shrinkable mesh material, after the last layered ore is mined, placing the mesh material in a compressed state on one side of a stope, fixing one end of the mesh material, dragging the other end of the mesh material to the other side of the stope, fixing the stretched mesh material in the stope, and finally filling the whole goaf by using filling slurry; when the next layer of ore is mined, the filling body reinforced by the net material in the previous layer is used as a filling false roof.
In particular, the collapsible mesh material is required to be prepared by 3D printing techniques according to the height, width and depth of the last layered ore stope.
In particular, the mesh material needs to be prepared by conventional techniques according to the height, width and depth of the last layered ore stope.
In particular, the mesh material is rubber, common resin or nylon.
In particular, the step of preparing the mesh material by the 3D printing technique comprises:
(1) establishing a mesh material model by using software, wherein the shape of the model is the same as that of the goaf, the model is cuboid, the length of the model is 20-30 m, the width of the model is 3-9 m, the height of the model is 3-5 m, and the side length of a single grid is 50-100 cm;
(2) and importing the mesh material model into a 3D printing program, and printing the model by using a 3D printer. The material of the printed model includes rubber, general resin, nylon, and the like.
Wherein: the tensile strength of the rubber is 15-20 MPa, the elongation is 500-520%, the compressive strength is 33-40J/m, the Poisson ratio: 0.1 to 0.3. The bending strength of the common resin is 60-70 MPa, the elongation (fracture) is 6-9%, the impact strength is 23-39J/m, the Poisson ratio: 0.4 to 0.45. The nylon has a tensile strength of 40-50 MPa, an elongation (break) of 30-40% and an impact strength of 10-15J/m.
In particular, the two ends of the mesh material are fixed by fixing structures on two sides of the stope respectively.
Specifically, one side of the stope is provided with a filling retaining wall 6 to fill the whole goaf with filling slurry 7; as shown in fig. 2 and 3.
Particularly, a plurality of expansion screws or short anchor rods 3 are arranged above the stretched mesh material 1 and below the ore body 2, a pulley guide groove 4 is arranged at the lower part of each expansion screw or short anchor rod 3, and a PVC filling pipe 5 for conveying filling slurry is arranged in each pulley guide groove 4; as shown in fig. 2 and 3.
In particular, the web material comprises an expanded state and a compressed state, as shown in fig. 1, a being the expanded state and b being the compressed state; in the expanded state for filling with slurry and in the compressed state for transport and storage.
In particular, the plurality of expansion screws or short anchor rods 3 are arranged in a straight line, and the number of the PVC filling pipes 5 is 1 or more, as shown in fig. 4.
In particular, the side view directional pattern and the front view directional pattern of the expanded state of the web material 1 are each composed of a plurality of diamonds, as shown in fig. 3 and 4.
In summary, the technical solution provided by the embodiment of the present invention at least has the following beneficial effects:
the invention provides a material for reinforcing a filling body by using a contractible structure and a filling false roof construction method, aiming at the problems that the construction of a manual false roof is complex and the labor intensity of workers is high in the prior art. The material has high strength and strong contractibility, and compared with the laying of a reinforcing mesh, the material is used only by being unfolded and fixed on two sides in a stope without being hinged and welded by a large number of workers, so that the material has the remarkable advantages of simple construction mode and reduction of the labor intensity of the workers. In addition, the material can be used as a framework to be placed in the filling body, so that the compression strength and the bending strength of the filling body are increased, the stability of the filling false roof is greatly improved, and the safety of the mining process is guaranteed.
In conclusion, the invention omits the process of laying a large amount of reinforcing steel bar nets in the existing filling false roof construction process, changes the laying of the reinforcing steel bar nets into the process of reinforcing the upper filling body by using the shrinkable material as the framework, and reduces the hinging and welding work in the process of laying the reinforcing steel bars. Meanwhile, the material is used as a framework, so that the strength of the filling body of the previous layer is greatly increased, and the safety of the ore mining process of the next layer is obviously improved.
Therefore, the technology of the invention has the advantages of simple construction, low labor intensity of workers, low cost, reliable quality of filling the false roof and the like; the method has important significance for quickly and conveniently constructing the filling false roof and realizing quick layer transfer of mining by a downward access filling method.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A construction method for filling a false roof by using a shrinkable mesh material is characterized in that the shrinkable mesh material is manufactured firstly, after the last layered ore is mined, the mesh material in a compressed state is placed on one side of a stope, one end of the mesh material is fixed, the other end of the mesh material is dragged to the other side of the stope, the stretched mesh material is fixed in the stope, and finally, the whole goaf is filled with filling slurry; when the next layer of ore is mined, the filling body reinforced by the net material in the previous layer is used as a filling false roof.
2. The method of constructing a false roof filled with a shrinkable mesh material as set forth in claim 1, wherein said one shrinkable mesh material is prepared by 3D printing technology according to the height, width and length of the last layered ore stope.
3. A method of constructing a false roof by filling collapsible mesh material as claimed in claim 1, wherein the mesh material is required to be prepared by conventional techniques according to the height, width and length of the last layered ore stope.
4. A method of constructing a false roof by filling a collapsible mesh material as claimed in claim 1, wherein the mesh material is rubber, general resin or nylon.
5. A method of constructing a false roof by filling a collapsible mesh material as claimed in claim 1, wherein the ends of the mesh material are secured by securing formations on either side of the stope.
6. The method of constructing a false roof by using collapsible mesh material in accordance with claim 1, wherein the stope side is provided with a retaining wall for filling the entire gob with the filling slurry.
7. The method as claimed in claim 1, wherein a plurality of expansion screws or short anchor rods are installed above the stretched net-shaped material and below the ore body, a pulley guide groove is installed at a lower portion of each of the expansion screws or short anchor rods, and a PVC filling pipe for transferring filling slurry is installed in the pulley guide groove.
8. A method of constructing a false roof by filling a collapsible mesh material according to claim 1, wherein the mesh material comprises an expanded state for filling with a filling slurry and a compressed state for transportation and storage.
9. The method as claimed in claim 7, wherein the plurality of expansion screws or short bolts are arranged in a straight line, and the number of the PVC filling pipes is 1 or more.
10. The method of constructing a false roof filled with a collapsible mesh material as recited in claim 8, wherein the expanded state of the mesh material has a side view directional pattern and a front view directional pattern each comprising a plurality of diamonds.
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| CN202110363031.3A CN112727539B (en) | 2021-04-02 | 2021-04-02 | Construction method for filling false roof by using shrinkable mesh material |
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| CN202110363031.3A CN112727539B (en) | 2021-04-02 | 2021-04-02 | Construction method for filling false roof by using shrinkable mesh material |
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| CN112727539B CN112727539B (en) | 2021-07-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113250745A (en) * | 2021-06-22 | 2021-08-13 | 北京科技大学 | Artificial false roof construction method of built-in basalt fiber geogrid reinforced structure |
| CN113250746A (en) * | 2021-07-05 | 2021-08-13 | 北京科技大学 | Folding type reinforcing device and layered stoping method |
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| CN112523801A (en) * | 2020-11-23 | 2021-03-19 | 中南大学 | Fiber woven mesh reinforced tailing solidification filling structure and filling process thereof |
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2021
- 2021-04-02 CN CN202110363031.3A patent/CN112727539B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU2116457C1 (en) * | 1996-10-09 | 1998-07-27 | Тибилов Шота Сардионович | Method for erection of artificial ceiling |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113250745A (en) * | 2021-06-22 | 2021-08-13 | 北京科技大学 | Artificial false roof construction method of built-in basalt fiber geogrid reinforced structure |
| CN113250745B (en) * | 2021-06-22 | 2021-10-01 | 北京科技大学 | Artificial false roof construction method of built-in basalt fiber geogrid reinforced structure |
| CN113250746A (en) * | 2021-07-05 | 2021-08-13 | 北京科技大学 | Folding type reinforcing device and layered stoping method |
| CN113250746B (en) * | 2021-07-05 | 2021-10-15 | 北京科技大学 | Folding type reinforcing device and layered stoping method |
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