CN111764910A - Coal mine overpass air bridge roadway tunneling construction method - Google Patents
Coal mine overpass air bridge roadway tunneling construction method Download PDFInfo
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- CN111764910A CN111764910A CN202010585761.3A CN202010585761A CN111764910A CN 111764910 A CN111764910 A CN 111764910A CN 202010585761 A CN202010585761 A CN 202010585761A CN 111764910 A CN111764910 A CN 111764910A
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- 238000010276 construction Methods 0.000 title claims abstract description 38
- 230000005641 tunneling Effects 0.000 title claims abstract description 21
- 239000003245 coal Substances 0.000 title claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000004567 concrete Substances 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052742 iron Inorganic materials 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims abstract description 5
- 230000002787 reinforcement Effects 0.000 claims description 6
- 239000011435 rock Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 14
- 238000009423 ventilation Methods 0.000 description 12
- 238000007789 sealing Methods 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/152—Laggings made of grids or nettings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
- E21D11/155—Laggings made of strips, slats, slabs or sheet piles
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a coal mine overpass air bridge tunneling construction method, and relates to the technical field of mine tunneling. The method comprises the following steps: A. excavating a foundation trench in an upper roadway according to the position of the calibrated overpass measured by the mine ground; B. paving transverse I-beams at the bottom of the base groove, and paving a first warp-weft net above the I-beams; C. laying longitudinal I-beams above the longitude and latitude net, and welding and fixing the transverse I-beams and the longitudinal I-beams through anchor rods; D. laying a second graticule above the longitudinal I-shaped steel, and fixedly connecting the two graticules through iron wires and anchor rods; E. pouring concrete in the foundation trench to manufacture an upper lane false bottom, and driving a lower lane; F. after the lower lane is tunneled to pass through the interchange position, laying a steel plate above the I-shaped steel frame shed of the lower lane; G. and (4) expanding the two sides of the lower lane, building a wall, and pouring concrete to manufacture the lower lane false roof. The method simplifies the process of air bridge tunneling construction, can also effectively prevent short circuit of wind current, and is safer and more stable in roadway support.
Description
Technical Field
The invention relates to the technical field of mine roadway tunneling, in particular to a coal mine overpass roadway tunneling construction method.
Background
In the ventilation structure of the coal mine, the air bridge is a ventilation structure which separates the air inlet from the air return when the air inlet lane and the air return lane in the ventilation system need to be horizontally crossed. The mine overpass is easy to leak air due to the close distance of the overpass tunnels, and the two tunnels of the vertical overpass tunnels are an air inlet tunnel and an air return tunnel respectively, which often cause the short circuit of a ventilation system when air leakage occurs. In order to avoid short circuit of the overpass, the existing construction method is to directly pour the concrete air bridge between the upper layer of overpass roadway and the lower layer of overpass roadway, the concrete air bridge has compact structure and is firmer, but the construction of the concrete air bridge is complicated, the construction amount is large, and the construction cost is high. The concrete construction of the concrete air bridge comprises the steps of firstly expanding the two sides of the tunnel at the air bridge, digging a wall foundation after expanding the sides, then setting a reinforcement anchor rod as reinforcement, erecting a model box for pouring the wall, and finally erecting a construction shed perpendicular to the direction of the tunnel. In order to ensure the stability of ventilation and diversion of the tunnel, avoid ventilation short circuit caused by air leakage, ensure the stability of tunnel support and facilitate construction, the existing method for tunneling the tunnel of the overpass needs to be further improved.
Disclosure of Invention
In order to simplify the air bridge tunneling construction procedure, effectively prevent short circuit of air current and ensure the safety and stability of roadway support, the invention provides a coal mine overpass roadway tunneling construction method, which has the following specific technical scheme:
a coal mine overpass air bridge roadway tunneling construction method is characterized by comprising the following steps:
A. excavating a base groove on a bottom plate of an upper roadway according to the interchange position calibrated by the mine ground survey data;
B. paving transverse I-beams at the bottom of the base groove, and paving a first warp-weft net above the I-beams;
C. laying longitudinal I-beams above the first warp-weft net, and welding and fixing the transverse I-beams and the longitudinal I-beams through anchor rods;
D. a second graticule is laid above the longitudinal I-steel, and the first graticule and the second graticule are fixedly connected;
E. pouring concrete in the foundation trench to manufacture an upper lane false bottom, and driving a lower lane;
F. after the lower lane is tunneled to pass through the interchange position, laying a steel plate above the I-shaped steel frame shed of the lower lane;
G. and (4) expanding the two sides of the lower lane, building a wall, and pouring concrete to manufacture the lower lane false roof.
Preferably, the size of the foundation trench is at least 100mm larger than the width of the roadway of the upper roadway.
Preferably, the first warp-weft net and the second warp-weft net are fixedly connected through iron wires and anchor rods.
Preferably, the distance between the transverse and longitudinal i-beams is greater than 800 mm.
Preferably, the step of building the wall in the step G includes excavating a wall foundation, driving a reinforced anchor rod, manufacturing a mold box, and pouring the wall.
It is further preferable that the upper lane false bottom closes a bottom plate of the upper lane space, the lower lane false top closes a top plate of the lower lane space, and an airtight shell of the overpass is formed between the upper lane false bottom and the lower lane false top.
It is further preferred that when soft rock is arranged between the upper lane false bottom and the lower lane false top, a counter-pull anchor rod is arranged, and grouting is carried out on the soft rock from the upper lane top plate.
The coal mine overpass air bridge roadway tunneling construction method provided by the invention has the beneficial effects that: the method ensures the stable ventilation in the upper lane by excavating the foundation trench in the upper lane and constructing the artificial false bottom of the upper lane, and is more convenient to construct the wall and the false top in the lower lane, thereby simplifying the construction steps, not constructing an integral concrete overpass, completing the sealing between the overpass lanes at the false bottom of the upper lane and the false top of the lower lane, and avoiding the ventilation short circuit caused by air leakage.
Drawings
FIG. 1 is a schematic diagram of a construction process of coal mine overpass air bridge tunneling;
FIG. 2 is a top view of a construction roadway;
FIG. 3 is a cross-sectional view of a portion of a construction roadway;
in the figure: 1-upper lane false bottom, 2-lower lane false top, 3-single hydraulic prop, 4-hinged top beam, 5-I-steel, 6-anchor rod and 7-steel plate.
Detailed Description
A concrete embodiment of the coal mine overpass air bridge roadway excavation construction method provided by the invention is described with reference to fig. 1 to 3.
Example 1
A coal mine overpass tunnel driving construction method is applied to the construction of the overpass tunnel at the crossing position of an air inlet tunnel and an air return tunnel under a coal mine, and the method ensures the tightness by constructing an upper tunnel false bottom and a lower tunnel false top and avoids the short circuit of a ventilation system caused by air leakage, and comprises the following steps:
A. according to the position of the interchange calibrated according to the mine ground survey data, the upper lane of the interchange air bridge position is an upper layer lane, the lower lane is a lower layer lane, the upper lane and the lower lane are respectively an air inlet lane and an air return lane, and the upper lane can cross the lower lane through an upper slope lane and a lower slope lane. And excavating a foundation trench on the bottom plate of the upper roadway, wherein the size of the foundation trench is at least 100mm larger than the width of the upper roadway, and the depth of the foundation trench is determined according to the spacing distance between the upper roadway and the lower roadway, and is generally larger than 1000 mm.
B. And paving transverse I-beams at the bottom of the base groove, and paving a first warp-weft net above the I-beams. The I-steel can be 12# I-steel, the I-steel cushion is transversely arranged at the bottom of the base groove, the transverse I-steel is arranged perpendicular to the trend of the roadway, the I-steel is fixed in the bottom plates at two sides of the base groove, and then the graticule is laid in the base groove.
C. And laying longitudinal I-beams above the first warp-weft net, arranging the longitudinal I-beams along the trend of the roadway, and fixing the transverse I-beams and the longitudinal I-beams by welding through anchor rods, wherein the distance between the transverse I-beams and the longitudinal I-beams is more than 800 mm.
D. And a second graticule is laid above the longitudinal I-shaped steel, and the first graticule and the second graticule are fixedly connected. Wherein first longitude and latitude net and second longitude and latitude net are concrete through iron wire and stock fixed connection, can also can tighten through the iron wire through welded fastening and fix in addition can set up the group portion of the fixed longitude and latitude net structure of stock and foundation ditch.
E. And (5) pouring concrete in the foundation trench to manufacture an upper roadway false bottom, and tunneling a lower roadway. Concrete is poured in the foundation trench, the foundation trench side part, the I-shaped steel and the graticule form a whole under the action of the concrete, the concrete structure can be used for preferably sealing the upper roadway bottom plate, the reinforced concrete structure also has good bearing capacity and deformation capacity, and the width of the foundation trench is greater than that of the upper roadway, so that the complete sealing of the bottom plate can be ensured. And after the concrete is solidified, tunneling a lower lane, and carrying out shed supporting on the lower lane along with the tunneling of the lower lane.
F. And after the lower lane tunnels through the interchange position, laying a steel plate above the I-shaped steel frame shed of the lower lane. The steel plates are arranged densely, so that the roadway can be better supported, and convenience is provided for the next step of concrete pouring.
G. And (4) expanding the two sides of the lower lane, building a wall, and pouring concrete to manufacture the lower lane false roof. The step of building the wall includes, excavate the wall body basis, beat the stability of arrangement of reinforcement stock assurance building the wall, the preparation diaphragm capsule is conveniently pour, pours the wall body. And after the concrete pouring wall body is solidified, manufacturing a lower lane false roof above the steel plate, and forming the stable lower lane false roof by grouting.
The upper lane false bottom closes a bottom plate of the upper lane space, the lower lane false top closes a top plate of the lower lane space, and an airtight shell of the overpass is formed between the upper lane false bottom and the lower lane false top. When soft rock exists between the upper lane false bottom and the lower lane false top, a counter-pull anchor rod can be arranged, and grouting can be performed on the soft rock from the upper lane top plate, so that cracks are sealed, and air leakage is prevented.
The existing concrete air bridge is constructed, the space between an upper roadway and a lower roadway needs to be completely excavated and then concrete is poured, the method ensures stable ventilation in the upper roadway by excavating a foundation trench in the upper roadway and constructing an artificial false bottom of the upper roadway, the construction of wall body and false roof in the lower roadway is more convenient, the construction steps are simplified, the whole concrete overpass needs not to be constructed, the airtight between the overpass roadways is completed by the artificial bottom of the upper roadway and the false roof of the lower roadway, and the ventilation short circuit caused by air leakage is avoided.
Example 2
The method will be further explained by taking the mine-808 auxiliary air intake ascending and 1314 rail down-grade crossroads, -808 and filling connection roadway crossroads as examples in combination with the embodiment 1.
-808 auxiliary air intake ascending and 1314 rail descending overpass, -808 overpass with filling connection roadway, forming an overpass air bridge when the driving roadway is communicated, in order to prevent the air flow from generating short circuit when the overpass air bridge is communicated and ensure the stability and safety of ventilation system and the stability of roadway support. During construction, a construction false roof foundation trench is calibrated at the site position in advance, and concrete is poured into the foundation trench to build an upper lane false bottom (a lower lane false roof). After the head-on completely passes through the interchange position, the method starts to expand the two sides of the tunnel at the air bridge at the lower tunnel false roof (steel plates are laid above the I-shaped steel shed beam), the wall foundation is dug after the side expansion, reinforcement arrangement anchor rods are arranged to be used for reinforcement arrangement, a model box is erected for wall body pouring, and finally the construction shed is erected in the direction perpendicular to the tunnel. The construction of the overpass is completed in advance, so that the stability of wind current and the stability of roadway support safety before two roadways are communicated are guaranteed.
The concrete construction is as follows: firstly, excavating a foundation trench on a bottom plate of an upper roadway according to a position of a interchange calibrated by mine ground survey data, wherein the upper roadway is supported by a single hydraulic prop and a hinged top beam, the width of the upper roadway is 5m, and the width of the foundation trench is 7.2 m; secondly, laying transverse I-beams at the bottom of the base groove, using 12# I-beams, and laying a first warp-weft net above the I-beams; then, laying longitudinal I-beams above the first warp-weft net, and welding and fixing the transverse I-beams and the longitudinal I-beams through anchor rods, wherein the distance between the anchor rods is 2m, and the length of each anchor rod is 1.2 m; then laying a second graticule above the longitudinal I-steel, and fixedly connecting the first graticule with the second graticule; pouring concrete in the foundation trench to manufacture an upper lane false bottom, and driving a lower lane; after the lower lane is tunneled to pass through the interchange position, laying a 10mm steel plate above the I-shaped steel frame shed of the lower lane; and finally, expanding the two sides of the lower lane and building a wall, expanding the lower lane to 6m, and pouring concrete to manufacture the lower lane false roof.
The method for constructing the overpass in advance not only ensures the stability of the wind flow of the through front roadway of the overpass, but also shortens the link of the air bridge construction in the tunneling process by pouring and hardening the air bridge surface in the process of tunneling the overpass by a tunneling team.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (7)
1. A coal mine overpass air bridge roadway tunneling construction method is characterized by comprising the following steps:
A. excavating a base groove on a bottom plate of an upper roadway according to the interchange position calibrated by the mine ground survey data;
B. paving transverse I-beams at the bottom of the base groove, and paving a first warp-weft net above the I-beams;
C. laying longitudinal I-beams above the first warp-weft net, and welding and fixing the transverse I-beams and the longitudinal I-beams through anchor rods;
D. a second graticule is laid above the longitudinal I-steel, and the first graticule and the second graticule are fixedly connected;
E. pouring concrete in the foundation trench to manufacture an upper lane false bottom, and driving a lower lane;
F. after the lower lane is tunneled to pass through the interchange position, laying a steel plate above the I-shaped steel frame shed of the lower lane;
G. and (4) expanding the two sides of the lower lane, building a wall, and pouring concrete to manufacture the lower lane false roof.
2. The coal mine overpass air bridge roadway driving construction method according to claim 1, wherein the size of the foundation trench is at least 100mm larger than the roadway width of the upper roadway.
3. The coal mine interchange air bridge roadway driving construction method according to claim 1, wherein the first longitude and latitude net and the second longitude and latitude net are fixedly connected through iron wires and anchor rods.
4. The coal mine overpass air bridge roadway driving construction method according to claim 1, wherein the distance between the transverse I-shaped steel and the longitudinal I-shaped steel is larger than 800 mm.
5. The coal mine overpass air bridge roadway driving construction method according to claim 1, wherein the step of building the wall in the step G comprises the steps of excavating a wall foundation, driving a reinforcement anchor rod, manufacturing a mold box and pouring the wall.
6. The coal mine overpass air bridge tunneling construction method according to claim 1, wherein the upper lane false bottom closes a bottom plate of an upper lane space, the lower lane false top closes a top plate of a lower lane space, and an airtight shell of the overpass is formed between the upper lane false bottom and the lower lane false top.
7. The coal mine overpass air bridge roadway driving construction method according to claim 6, wherein a counter-pulling anchor rod is arranged between the upper roadway false bottom and the lower roadway false top when soft rock exists, and grouting is performed on the soft rock from the upper roadway top plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010585761.3A CN111764910A (en) | 2020-06-24 | 2020-06-24 | Coal mine overpass air bridge roadway tunneling construction method |
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| CN202010585761.3A CN111764910A (en) | 2020-06-24 | 2020-06-24 | Coal mine overpass air bridge roadway tunneling construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137243A (en) * | 2021-03-27 | 2021-07-20 | 山东新巨龙能源有限责任公司 | Reinforcing method for corrosion-resistant interchange roadway of loose coal cylinder |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5466187A (en) * | 1991-05-28 | 1995-11-14 | Jack Kennedy Metal Products And Buildings, Inc. | Mine ventilation structure |
| US20100017975A1 (en) * | 2008-07-28 | 2010-01-28 | Kennedy Metal Products & Buildings, Inc. | Reinforced Mine Ventilation Device |
| CN102383820A (en) * | 2011-10-06 | 2012-03-21 | 山西晋城无烟煤矿业集团有限责任公司 | Coal mine underground airbridge construction method |
| CN103410550A (en) * | 2013-08-05 | 2013-11-27 | 山西晋城无烟煤矿业集团有限责任公司 | Method for constructing underground air crossing of coal mine |
| CN203730041U (en) * | 2014-01-26 | 2014-07-23 | 平顶山天安煤业股份有限公司 | Suspended air bridge |
| CN109209393A (en) * | 2018-09-13 | 2019-01-15 | 内蒙古伊泰京粤酸刺沟矿业有限责任公司 | Tunnel grade separation speedy construction method |
| CN208816163U (en) * | 2018-06-18 | 2019-05-03 | 北京昊华能源股份有限公司 | A kind of soft air crossing of return air access |
-
2020
- 2020-06-24 CN CN202010585761.3A patent/CN111764910A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5466187A (en) * | 1991-05-28 | 1995-11-14 | Jack Kennedy Metal Products And Buildings, Inc. | Mine ventilation structure |
| US20100017975A1 (en) * | 2008-07-28 | 2010-01-28 | Kennedy Metal Products & Buildings, Inc. | Reinforced Mine Ventilation Device |
| CN102383820A (en) * | 2011-10-06 | 2012-03-21 | 山西晋城无烟煤矿业集团有限责任公司 | Coal mine underground airbridge construction method |
| CN103410550A (en) * | 2013-08-05 | 2013-11-27 | 山西晋城无烟煤矿业集团有限责任公司 | Method for constructing underground air crossing of coal mine |
| CN203730041U (en) * | 2014-01-26 | 2014-07-23 | 平顶山天安煤业股份有限公司 | Suspended air bridge |
| CN208816163U (en) * | 2018-06-18 | 2019-05-03 | 北京昊华能源股份有限公司 | A kind of soft air crossing of return air access |
| CN109209393A (en) * | 2018-09-13 | 2019-01-15 | 内蒙古伊泰京粤酸刺沟矿业有限责任公司 | Tunnel grade separation speedy construction method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137243A (en) * | 2021-03-27 | 2021-07-20 | 山东新巨龙能源有限责任公司 | Reinforcing method for corrosion-resistant interchange roadway of loose coal cylinder |
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