CN112302719A - Method for erecting underground gallery filling pipeline - Google Patents
Method for erecting underground gallery filling pipeline Download PDFInfo
- Publication number
- CN112302719A CN112302719A CN202011302868.9A CN202011302868A CN112302719A CN 112302719 A CN112302719 A CN 112302719A CN 202011302868 A CN202011302868 A CN 202011302868A CN 112302719 A CN112302719 A CN 112302719A
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- CN
- China
- Prior art keywords
- pipeline
- filling
- filling pipeline
- roadway
- pull rod
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000002002 slurry Substances 0.000 claims abstract description 14
- 239000011083 cement mortar Substances 0.000 claims abstract description 5
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 7
- 210000001503 joint Anatomy 0.000 claims 6
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000004873 anchoring Methods 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/02—Suspension devices for tubes or the like, e.g. for ventilating ducts
-
- 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
- E21F15/08—Filling-up hydraulically or pneumatically
Abstract
The invention relates to an erection method of a filling pipeline of an underground roadway, which is characterized by comprising the following steps: comprises the following steps: 1) determining the height of the filling pipeline from a roadway bottom plate, and 2) presetting a row of anchor rods at the arch top of the roadway at equal intervals along the flowing direction of slurry in the filling pipeline; the lower end of the anchor rod is welded with a pipeline hanger pull rod, the lower part of the pipeline hanger pull rod is welded with a tail ring, and the upper end of the anchor rod is anchored on the vault of the roadway through cement mortar; 3) the filling pipeline is composed of a plurality of pipeline sections, each section of filling pipeline is connected with the upstream filling pipeline by adopting a clamp type joint, and a pipe clamp is arranged in the middle of each section of filling pipeline and is fixedly connected with the tail ring of the hanger pull rod through a bolt, a washer and a nut until the tail end of the filling pipeline in the filling stope. The advantages are that: the pipeline is convenient to mount and dismount, the width and the section area of the roadway can be reduced, the engineering quantity is saved, and the local resistance of filling slurry conveying can be reduced.
Description
Technical Field
The invention relates to a mine exploitation filling system, in particular to an erection method of an underground roadway filling pipeline for assisting mine filling, which can effectively reduce the width and the section area of a roadway, save the engineering quantity, avoid the concave-convex fluctuation of the pipeline and be beneficial to the pipeline transportation of filling slurry.
Background
At present, mine underground filling pipe mostly adopts and lays along the tunnel bottom plate, or along the mode that the lateral wall of roadway erect, the pipeline is satisfying under the safe current's such as vehicle and personnel the condition, it is great to lead to the tunnel width, and the hunch height is directly proportional with the tunnel width, consequently must lead to the tunnel section great, increase the tunnelling and strut engineering volume, especially when filling pipe erects along the lateral wall of roadway, if arrange with pressure wind and water supply pipe homonymy, the branch pipe valve and the fire hydrant of pressure wind and water supply pipe all conflict with filling pipe position, the event need erect filling pipe on the lateral wall of roadway of pressure wind and water supply pipe offside, lead to the tunnel section further to increase. Meanwhile, a plurality of chambers of connection roadways or branch roadways need to be spanned along the vein-following roadway where the horizontal main filling pipeline passes, so that the filling pipeline needs to frequently span doors, when an up-spanning door mode is adopted, the filling pipeline is convex, the local resistance is greatly increased, and slurry in the pipeline between two convex-shaped cross doors is easy to deposit; on the contrary, when the lower-span door is adopted, the filling pipeline is concave, so that the local resistance is also greatly increased, slurry in the pipeline at the concave door-spanning position is easy to deposit, and the pipeline at the concave door-spanning position is damaged due to rolling by vehicles and personnel. In addition, when the filling pipeline is laid along the roadway floor, the leakage condition of the pipeline is not easy to be perceived during inspection.
Disclosure of Invention
The invention aims to provide the method for erecting the underground gallery filling pipeline, which can effectively reduce the width and the section area of a roadway, save the engineering quantity, avoid the concave-convex fluctuation of the pipeline and facilitate the transportation of the filling slurry pipeline.
The technical scheme of the invention is realized as follows:
the invention discloses an erection method of an underground roadway filling pipeline, which is characterized by comprising the following steps: comprises the following steps:
the method comprises the following steps: determining the height of the filling pipeline from the roadway floor according to the safe passing height of the vehicles and the equipment,
step two: arranging anchor rods in a row at equal intervals along the flow direction of slurry in a filling pipeline at the arch top of the roadway; the lower end of the anchor rod is welded with a pipeline hanger pull rod, the lower part of the pipeline hanger pull rod is welded with a tail ring, and the upper end of the anchor rod is anchored on the vault of the roadway through cement mortar;
step three: laying of filling pipes
The filling pipeline is composed of a plurality of pipeline sections, each section of the filling pipeline is connected with the upstream filling pipeline through a clamp type joint, a pipe clamp is arranged in the middle of each section of the filling pipeline, and the pipe clamp and a tail ring of a pipeline hanger pull rod are fixedly connected through a bolt, a washer and a nut until the tail end of the filling pipeline in the filling stope is located.
Preferably, the anchor rod is a steel bar with the diameter of 25mm, the effective anchoring length is not less than 1.5m, and the length of the pull rod of the pipeline hanging bracket is not less than 0.2 m.
Preferably, the pipeline hanger pull rod and the tail ring are welded in a full welding mode, and the pipeline hanger pull rod and the anchor rod are welded on two sides.
Preferably, the length of the pipe section of the filling pipeline is 3 m-6 m.
Preferably, the pipe clamp hoop is an omega-shaped pipe clamp hoop or two butted C-shaped pipe clamp hoops.
Preferably, the clamp type joint is a flexible clamp type joint and a rigid clamp type joint.
Preferably, 1-3 clamp type joints in the front and rear 20m of the horizontal turning position of the filling pipeline are flexible clamp type joints, 1-3 clamp type joints at the position of every 150-200 m of the filling pipeline are flexible clamp type joints, and the rest are rigid clamp type joints.
The invention has the beneficial effects that:
1. the width and the section of the roadway are small, so that the amount of roadway tunneling and supporting engineering is reduced;
2. the cross door is not needed, the concave-convex fluctuation of the pipeline is avoided, the local resistance of the filling slurry conveying is greatly reduced, the slurry is not easy to deposit, and the pipeline conveying of the filling slurry is facilitated;
3. the pipeline is convenient to mount and dismount, and the labor intensity of workers is reduced;
4. the leakage condition of the filling pipeline can be observed conveniently during inspection.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a sectional view taken along line a-a in fig. 1.
Figure 3 is a schematic view of the lifting of the filling pipe during erection.
Fig. 4 is a schematic view of the welding of the pipe hanger tie rod and the exposed end of the anchor rod.
Fig. 5 is a sectional view taken along line B-B of fig. 4.
FIG. 6 is a schematic view of two abutting C-clamp clips attached to a tail ring.
FIG. 7 is a schematic view of a clamp-type joint with the clamp and tail ring connected in an omega-style pipe clamp.
The sequence numbers in the figures illustrate: the method comprises the following steps of 1-filling a pipeline, 2-clamp type joints, 3-anchor rods, 4-pipeline hanger pull rods, 41-tail rings, 5-pipe clamp clamps, 6-roadway, 7-limiting pipe holders and 8-movable scissor type lifting platforms.
Detailed Description
As shown in fig. 1 to 7, the method for erecting a filling pipe for a down-hole gallery according to the present invention is characterized in that: comprises the following steps:
the method comprises the following steps: the height of the filling pipeline from the bottom plate of the roadway 6 is determined according to the safe passing height of vehicles and equipment,
the height determination of safe passing of the vehicles and the equipment means that the clearance between the height trackless transport vehicles and the equipment which are safe to pass through the equipment and the protruding parts of the filling pipeline and the accessories thereof is more than or equal to 600 mm; the clearance between the rail transport vehicles, equipment and the protruding parts of the filling pipelines and accessories thereof is more than or equal to 300 mm.
Step two: arranging anchor rods 3 at equal intervals at the arch top of the roadway 6 in a row along the flow direction of slurry in the filling pipeline 1; the lower end of the anchor rod 3 is welded with a pipeline hanger pull rod 4, the lower part of the pipeline hanger pull rod 4 is welded with a tail ring 41, and the upper end of the anchor rod 3 is fixed on the arch top of the roadway 6 through a cement mortar anchor;
step three: laying of filling pipes
The filling pipeline 1 is composed of a plurality of pipeline sections, each section of the filling pipeline 1 is connected with an upstream filling pipeline through a clamp type joint 2, a pipe clamp 5 is arranged in the middle of each section of the filling pipeline 1, and the pipe clamp 5 is fixedly connected with a tail ring 41 of a pipeline hanger pull rod 4 through bolts, gaskets and nuts until the tail end of the filling pipeline 1 in a filling stope.
In the method for erecting the underground gallery filling pipeline, the anchor rods 3 are reinforcing steel bars with the diameter of 25mm, the effective anchoring length is not less than 1.5m, and the length of the pipeline hanger pull rod 4 is not less than 0.2 m.
In the method for erecting the underground gallery filling pipeline, the pipeline hanger pull rod 4 and the tail ring 41 are welded in a full-length welding manner, and the pipeline hanger pull rod 4 and the anchor rod 3 are welded on two sides, as shown in fig. 4 and 5.
In the method for erecting the underground gallery filling pipeline, the length of the pipe section of the filling pipeline 1 is 3 m-6 m.
Because the middle position of each section of filling pipeline 1 is provided with the pipe clamp hoop 5, and the pipe clamp hoop 5 is fixedly connected with the tail ring 41 of the pipeline hanger pull rod 4 through bolts, washers and nuts, the distance of the anchor rods is the same as the length of the pipeline section.
In the method for erecting the underground gallery filling pipeline, the pipe clamp hoop is an omega-shaped pipe clamp hoop or two butted C-shaped pipe clamp hoops, as shown in fig. 6 and 7.
In the method for erecting the underground roadway filling pipeline, the clamp type joint 2 is a flexible clamp type joint or a rigid clamp type joint.
In the method for erecting the underground gallery filling pipeline, 1-3 clamp type joints in the front and rear 20m of the horizontal turning position of the filling pipeline are flexible clamp type joints, 1-3 clamp type joints at the position of every 150-200 m of the filling pipeline are flexible clamp type joints, and the rest are rigid clamp type joints.
The flexible clamp type joint is reliable in performance and simple and convenient to install. Flexible clamp-type joints allow axial expansion or radial deflection of the pipes, forming a so-called flexible connection. At low pressure, the purpose of sealing is achieved by elastic deformation of the sealing ring; when the pressure is increased, the medium acts on the sealing ring to play a role of self sealing, and a gap is reserved in the middle to compensate displacement and deflection of the pipeline caused by thermal expansion and cold contraction. The invention is further described below with reference to specific examples:
a certain mine adopts high-concentration tailing cemented filling slurry to carry and fill an underground goaf by gravity, a filling pipeline 1 is a 16Mn seamless steel pipe with phi 219 multiplied by 18, an erection method of an underground gallery filling pipeline shown in figures 1-6 is adopted, an anchor rod with the effective anchoring length of 1.6m and the exposure of 0.4m is preset at the arch crown of a roadway every 3m, the anchor rod adopts cement mortar to fix the anchor rod 3 on the arch crown of the roadway 6, and the anchor rod 3 is a steel bar with the diameter of 25 mm. The filling pipeline 1 is composed of a plurality of pipeline sections, each pipeline section is 3m in length and is hung on the top of a roadway 6 arch through a pipe clamp hoop 5, and the pipe clamp hoop 5 selects two butted C-shaped pipe clamp hoops. Comprehensively considering the requirements of safe passing distance of other pipelines, cables and lighting devices laid in a roadway and personnel, vehicles and other equipment, determining that the height from the center of a filling pipeline 1 to the bottom plate of the roadway 6 is 2.8M, welding a pipeline hanger pull rod 4 with a tail ring 41 on the exposed end of an anchor rod 3, wherein the length of the pipeline hanger pull rod 4 is 250mm, performing double-side welding on the pipeline hanger pull rod 4 and the exposed end of the anchor rod 3, the length of a welding seam is 100mm, the aperture of the tail ring 41 of the pipeline hanger pull rod 4 is 22mm, performing full-weld treatment on the opening of the tail ring 41, and fastening the tail ring 41 and a pipe clamp 5 by using bolts, gaskets and nuts with the specification of M20. 3 clamp type pipe joints between every 180 m-190 m of the filling pipeline 1 and 3 clamp type pipe joints between the front 10 m-20 m and the back 10m of the horizontal turning part of the filling pipeline are flexible clamp type pipe joints, and the rest are rigid clamp type pipe joints.
When the filling pipeline 1 is erected, firstly, a limiting pipe support 7 is arranged on a movable scissor type lifting platform 8, a section of the filling pipeline 1 is placed on the limiting pipe support, then the movable scissor type lifting platform 8 is used for lifting the center of the filling pipeline 1 to a preset installation position with the height of 2.8m away from a roadway bottom plate, a clamp type pipe joint 2 is used for connecting one side end part of the section of the filling pipeline with an upstream filling pipeline, then a pipe clamp 5 is sleeved on the section of the filling pipeline, the pipe clamp 5 is fastened with a tail ring 41 of a pipeline hanger pull rod by bolts, gaskets and nuts, and the pipe clamp 5 and the tail ring 41 are sequentially installed section by section until the tail end of the filling pipeline in a filling stope.
Practice shows that after the method for erecting the filling pipeline of the underground roadway is adopted, the pipeline is convenient to mount and dismount, the roadway width and the section area can be effectively reduced, the engineering quantity is saved, the concave-convex fluctuation of the pipeline can be avoided, the filling slurry pipeline conveying is facilitated, and the leakage condition of the filling pipeline can be observed conveniently during inspection.
Claims (7)
1. The method for erecting the underground gallery filling pipeline is characterized by comprising the following steps: comprises the following steps:
the method comprises the following steps: determining the height of the filling pipeline from the roadway floor according to the safe passing height of the vehicles and the equipment,
step two: arranging anchor rods in a row at equal intervals along the flow direction of slurry in a filling pipeline at the arch top of the roadway; the lower end of the anchor rod is welded with a pipeline hanger pull rod, the lower part of the pipeline hanger pull rod is welded with a tail ring, and the upper end of the anchor rod is anchored on the vault of the roadway through cement mortar;
step three: laying of filling pipes
The filling pipeline is composed of a plurality of pipeline sections, each section of the filling pipeline is connected with the upstream filling pipeline through a clamp type joint, a pipe clamp is arranged in the middle of each section of the filling pipeline, and the pipe clamp and a tail ring of the hanger pull rod are fixedly connected through a bolt, a washer and a nut until the tail end of the filling pipeline in the filling stope is located.
2. A method of erecting a downhole laneway filling pipe according to claim 1, wherein: the stock is the reinforcing bar of diameter 25mm, and effective anchor length is not less than 1.5m, and the length of pipeline gallows pull rod is not less than 0.2 m.
3. A method of erecting a downhole laneway filling pipe according to claim 1, wherein: the pipeline hanger pull rod and the tail ring are welded in a full welding mode, and the pipeline hanger pull rod and the anchor rod are welded on two sides.
4. An erection method of a filling pipe for a down-hole gallery according to claim 1, characterized in that the length of the filling pipe section is 3-6 m.
5. A method of erecting a downhole laneway filling pipe according to claim 1, wherein: the pipe clamp hoop is an omega-shaped pipe clamp hoop or two C-shaped pipe clamp hoops which are in butt joint.
6. A method of erecting a downhole laneway filling pipe according to claim 1, wherein: the clamp type joint is a flexible clamp type joint and a rigid clamp type joint.
7. A method of erecting a downhole laneway filling pipe according to claim 6, wherein: the method is characterized in that 1-3 clamp type joints in the front and back 20m of the horizontal turning position of the filling pipeline are flexible clamp type joints, 1-3 clamp type joints at the position of every 150-200 m of the filling pipeline are flexible clamp type joints, and the rest are rigid clamp type joints.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011302868.9A CN112302719A (en) | 2020-11-19 | 2020-11-19 | Method for erecting underground gallery filling pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011302868.9A CN112302719A (en) | 2020-11-19 | 2020-11-19 | Method for erecting underground gallery filling pipeline |
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| Publication Number | Publication Date |
|---|---|
| CN112302719A true CN112302719A (en) | 2021-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011302868.9A Pending CN112302719A (en) | 2020-11-19 | 2020-11-19 | Method for erecting underground gallery filling pipeline |
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| CN (1) | CN112302719A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113513365A (en) * | 2021-06-02 | 2021-10-19 | 榆林泰发祥矿业有限公司 | Efficient roof-contacting technology for filling paste for mine |
| CN114776886A (en) * | 2022-05-17 | 2022-07-22 | 南京银茂铅锌矿业有限公司 | Method for replacing filling pipe in vertical steel sleeve |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537527A (en) * | 2011-12-29 | 2012-07-04 | 大连益多管道有限公司 | Internal expansion bolt pipe lifting frame |
| CN104989449A (en) * | 2015-06-18 | 2015-10-21 | 长沙矿山研究院有限责任公司 | Filling mining pipeline erecting and filling method |
| CN205560001U (en) * | 2016-04-01 | 2016-09-07 | 陕西煎茶岭镍业有限公司 | A device is laid to pipe cable for cut -and -fill mining |
| CN207034407U (en) * | 2017-05-22 | 2018-02-23 | 江苏轩瑞结构减振设备有限公司 | A kind of nuclear power pipe-hanger support |
| CN207500636U (en) * | 2017-09-30 | 2018-06-15 | 浙江创想节能科技有限公司 | A kind of high temperature insulating suspension and support for being used for heat distribution pipeline and equipment |
| CN108679314A (en) * | 2018-06-15 | 2018-10-19 | 荣马电器有限公司 | A kind of shake of subway high intensity is reduced expenditure hanger |
| CN110318805A (en) * | 2019-07-25 | 2019-10-11 | 山西华毓恒技术服务有限公司太原分公司 | Underground multifunctional erecting by overhang |
| CN210370769U (en) * | 2019-08-20 | 2020-04-21 | 山西三元福达煤业有限公司 | Adjustable gas pipe hanging device |
-
2020
- 2020-11-19 CN CN202011302868.9A patent/CN112302719A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537527A (en) * | 2011-12-29 | 2012-07-04 | 大连益多管道有限公司 | Internal expansion bolt pipe lifting frame |
| CN104989449A (en) * | 2015-06-18 | 2015-10-21 | 长沙矿山研究院有限责任公司 | Filling mining pipeline erecting and filling method |
| CN205560001U (en) * | 2016-04-01 | 2016-09-07 | 陕西煎茶岭镍业有限公司 | A device is laid to pipe cable for cut -and -fill mining |
| CN207034407U (en) * | 2017-05-22 | 2018-02-23 | 江苏轩瑞结构减振设备有限公司 | A kind of nuclear power pipe-hanger support |
| CN207500636U (en) * | 2017-09-30 | 2018-06-15 | 浙江创想节能科技有限公司 | A kind of high temperature insulating suspension and support for being used for heat distribution pipeline and equipment |
| CN108679314A (en) * | 2018-06-15 | 2018-10-19 | 荣马电器有限公司 | A kind of shake of subway high intensity is reduced expenditure hanger |
| CN110318805A (en) * | 2019-07-25 | 2019-10-11 | 山西华毓恒技术服务有限公司太原分公司 | Underground multifunctional erecting by overhang |
| CN210370769U (en) * | 2019-08-20 | 2020-04-21 | 山西三元福达煤业有限公司 | Adjustable gas pipe hanging device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113513365A (en) * | 2021-06-02 | 2021-10-19 | 榆林泰发祥矿业有限公司 | Efficient roof-contacting technology for filling paste for mine |
| CN114776886A (en) * | 2022-05-17 | 2022-07-22 | 南京银茂铅锌矿业有限公司 | Method for replacing filling pipe in vertical steel sleeve |
| CN114776886B (en) * | 2022-05-17 | 2023-10-03 | 南京银茂铅锌矿业有限公司 | Method for replacing filling pipe in vertical steel sleeve |
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Application publication date: 20210202 |