CN117569864A - Device and method for exhausting gas of road tunnel penetrating through steep coal seam - Google Patents
Device and method for exhausting gas of road tunnel penetrating through steep coal seam Download PDFInfo
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- CN117569864A CN117569864A CN202311459331.7A CN202311459331A CN117569864A CN 117569864 A CN117569864 A CN 117569864A CN 202311459331 A CN202311459331 A CN 202311459331A CN 117569864 A CN117569864 A CN 117569864A
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- 239000003245 coal Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000000149 penetrating effect Effects 0.000 title description 4
- 238000000605 extraction Methods 0.000 claims abstract description 89
- 238000007789 sealing Methods 0.000 claims abstract description 87
- 238000003780 insertion Methods 0.000 claims abstract description 13
- 230000037431 insertion Effects 0.000 claims abstract description 13
- 238000005086 pumping Methods 0.000 claims abstract 6
- 239000000284 extract Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000009412 basement excavation Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 156
- 239000002002 slurry Substances 0.000 description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 238000001914 filtration Methods 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011440 grout Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 206010010071 Coma Diseases 0.000 description 1
- 208000000059 Dyspnea Diseases 0.000 description 1
- 206010013975 Dyspnoeas Diseases 0.000 description 1
- 206010028813 Nausea Diseases 0.000 description 1
- 206010070863 Toxicity to various agents Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 208000002173 dizziness Diseases 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000005802 health problem Effects 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008693 nausea Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Pipe Accessories (AREA)
Abstract
The invention relates to a gas drainage device and a method for a highway tunnel to penetrate through an acute-inclined coal seam, comprising the following steps: the suction pipe is used for extending into the gas extraction hole to extract gas and comprises an insertion end and a tail end, and the insertion end is used for facing the bottom end of the gas extraction hole; the suction device is communicated with the suction pipe and is used for providing negative pressure for the suction pipe to extract gas; the gas storage device is used for storing the extracted gas; the sealing elements are arranged around the suction pipe, a plurality of sealing elements are distributed at intervals along the length direction of the suction pipe, a negative pressure area is formed between every two adjacent sealing elements, suction holes are formed in the suction pipe in the negative pressure area, the suction holes are communicated with negative pressure pipes, the negative pressure pipes are communicated with the suction device, and the suction pipes in different negative pressure areas are communicated with the suction device through different negative pressure pipes. The gas pumping and exhausting process is safer and more efficient; the gas is extracted through the suction device, so that the content of the gas released into the tunnel in the subsequent excavation process can be greatly reduced, and the risk in the subsequent tunnel excavation process can be reduced.
Description
Technical Field
The invention relates to the technical field of tunnel gas treatment, in particular to a device and a method for exhausting gas by crossing an acute-inclined coal seam through a highway tunnel.
Background
The occurrence of gas in the tunnel excavation process is a common problem, and the main components of the gas are as follows: is methane (CH 4), and comprises carbon monoxide (CO), hydrogen sulfide (H2S), carbon dioxide (CO 2), sulfur dioxide (SO 2), nitrogen (N2), water gas and the like.
Gas is a flammable gas, and when the gas concentration reaches a certain range (usually 5% to 15% concentration), explosion may occur when exposed fire, electric spark or high-temperature objects are encountered. This can pose a serious threat to personnel and equipment and even cause casualties and property damage. Some gases, such as carbon monoxide, hydrogen sulfide, etc., are toxic. When the gas concentration exceeds a certain limit, inhalation of gas causes toxic symptoms such as dizziness, nausea, dyspnea and even coma. Prolonged exposure to high concentration gas environments can lead to serious health problems and even death.
At present, ventilation is usually carried out in the excavated tunnel so as to dilute the gas content in the tunnel, however, when special geological conditions appear in the tunnel, the condition that the gas release content is sharply increased possibly appears, modes such as ventilation can not effectively reduce the gas content, and certain potential safety hazards exist.
Disclosure of Invention
In order to solve the problems, the application provides a device and a method for draining gas of a road tunnel penetrating through an steep coal seam.
In a first aspect, the present application provides a gas drainage device for a highway tunnel penetrating through an acute-inclined coal seam, which adopts the following technical scheme:
a highway tunnel crossing steep coal seam gas drainage device, comprising:
the suction pipe is used for extending into the gas extraction hole to extract gas, and comprises an insertion end and a tail end, wherein the insertion end is used for facing the bottom end of the gas extraction hole;
the suction device is communicated with the suction pipe and is used for providing negative pressure for the suction pipe to extract gas;
the gas storage device is used for storing the extracted gas;
the negative pressure device comprises a suction pipe, a plurality of sealing elements, a negative pressure area, a suction hole and a negative pressure pipe, wherein the sealing elements are arranged around the suction pipe, the sealing elements are distributed at intervals along the length direction of the suction pipe, the negative pressure area is formed between the adjacent sealing elements, the suction pipe in the negative pressure area is provided with the suction hole, the suction hole is communicated with the negative pressure pipe, the negative pressure pipe is communicated with the suction device, and the suction pipes of different negative pressure areas are communicated with the suction device through different negative pressure pipes.
Preferably, a negative pressure cavity is formed in the suction pipe in a region corresponding to the negative pressure region, the negative pressure region and the negative pressure cavity are in one-to-one correspondence, the suction holes are communicated with the corresponding negative pressure cavities, the negative pressure cavities are in one-to-one correspondence with the negative pressure pipes, and the negative pressure pipes are communicated with the corresponding negative pressure cavities.
Preferably, the negative pressure pipe is located inside the suction pipe, and a perforation for the negative pressure pipe to pass through is arranged in the suction pipe.
Preferably, the sealing member comprises an inflatable airbag and an inflatable tube, the inflatable airbag is communicated with each other and surrounds the suction tube, the inflatable airbag is far away from the suction tube side and is used for being abutted against the inner wall of the gas extraction hole, one end of the inflatable tube is located at the tail end side, and an air valve is arranged at one end of the inflatable tube located at the tail end side.
Preferably, at least one side of the inflatable airbag towards the tail end is provided with a positioning rod, the positioning rod is hinged to the outer wall of the suction pipe along the direction perpendicular to the length direction of the suction pipe, the length of the hinge end of the positioning rod, which is away from the free end of the positioning rod, is larger than the distance between the outer wall of the suction pipe and the inner wall of the gas extraction hole, the free end of the positioning rod inclines towards the side close to the tail end, the positioning rod is connected with the inflatable airbag which is located at the side, away from the tail end, of the positioning rod, and when the inflatable airbag is inflated, the free end of the positioning rod can be driven to rotate to be in butt joint with the inner wall of the gas extraction hole.
Preferably, the joint of the inflatable airbag and the positioning rod is located at the side, away from the hinged end, of the positioning rod, and folds are formed in the side wall of the inflatable airbag connected with the positioning rod, and the inflatable airbags are stacked to form the folds.
Preferably, the tail end is provided with sealing part, be provided with the connecting chamber in the sealing part, negative pressure pipe and connecting chamber intercommunication department are provided with and are used for sealing the closure piece of negative pressure pipe, suction device and connecting chamber intercommunication, threaded connection has the pressure disk on the sealing part, the pressure disk is used for sealing the opening of gas extraction hole.
Preferably, the sealing part is provided with the sealing washer that is used for with gas drainage hole inner wall butt away from the pressure disk end, be formed with the mud jacking chamber between sealing washer and the pressure disk, be provided with the mud jacking mouth with the mud jacking chamber intercommunication on the pressure disk, the mud jacking mouth is used for connecting the grout pipeline.
Preferably, the sealing ring is sleeved on the outer wall of the sealing part, threads are arranged on the outer wall of the sealing part where the grouting cavity is located, and the inner wall of the grouting cavity is coated with a release agent.
In a second aspect, the present application provides a method for draining gas from a road tunnel through an acute-leaning coal seam, which adopts the following technical scheme:
a gas drainage method for a highway tunnel to penetrate through an steep coal seam comprises the following steps of:
a gas extraction hole is formed in a position where gas is required to be extracted;
inserting the suction pipe into the gas extraction hole, and enabling the sealing piece to be attached to the inner wall of the gas extraction hole;
the suction device is communicated with different negative pressure pipes, and the concentration of the gas in the different negative pressure pipes is detected respectively;
closing the negative pressure pipe with higher air content, and communicating the negative pressure pipe meeting the requirements with the suction device;
the suction device extracts and stores the gas in the negative pressure pipe in the gas storage device.
In summary, the present invention includes at least one of the following beneficial technical effects:
1. in use, the suction pipe is inserted into a gas extraction hole for extracting gas, at the moment, the negative pressure area and the inner wall of the gas extraction hole enclose a closed cavity, the negative pressure area divides the gas extraction hole into a plurality of closed cavities along the length direction, the gas extraction hole is communicated with different negative pressure areas through different negative pressure pipes, the gas content extracted by the different negative pressure pipes is detected, if the gas content of a certain negative pressure area is lower and the flow rate is larger during extraction, the negative pressure area is possibly communicated with the outside, and if the negative pressure area possibly communicated with the outside is continuously extracted, a part of negative pressure provided by the suction device is lost, so that the application can detect the gas extracted by the different negative pressure areas before extraction and close the negative pressure pipe of the negative pressure area with higher air content, the negative pressure area meeting the requirements is communicated with the suction device, at the moment, the suction device can extract the gas more efficiently, and the gas extraction process is more efficient; the gas is extracted through the suction device, so that the content of the gas released into the tunnel in the subsequent excavation process can be greatly reduced, and the risk in the subsequent tunnel excavation process can be reduced.
2. Through setting up the mud jacking chamber, can be before extracting gas, through mud jacking mouth to the mud jacking intracavity injection grout to can carry out the shutoff with the wall of the opening side of gas extraction hole, the partial gap that exists, seal the opening side of gas extraction hole simultaneously, and then when extracting gas, can effectively reduce and avoid the inside condition that directly switches on with the external world of gas extraction hole, improve gas extraction efficiency.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present application.
Fig. 2 is a cross-sectional view of the suction tube.
Fig. 3 is an enlarged schematic view of the portion a in fig. 2.
Fig. 4 is an enlarged schematic view of the portion C in fig. 3.
Fig. 5 is an enlarged schematic view of the portion B in fig. 2.
In the figure, 1, a suction device; 2. a gas storage device; 3. a suction tube; 31. an insertion end; 32. tail end; 4. a seal; 41. an inflatable airbag; 42. an inflation tube; 43. a valve; 5. a negative pressure region; 6. a suction hole; 7. a negative pressure pipe; 8. a negative pressure chamber; 9. perforating; 10. a positioning rod; 11. folding; 12. a sealing part; 13. a connecting cavity; 14. a closure; 15. a pressure plate; 16. a seal ring; 17. a grouting cavity; 18. grouting port; 19. an air bag seat.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In order to make those skilled in the art better understand the technical solutions in the present specification, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only some embodiments of the present application, but not all embodiments.
In the description of embodiments of the present application, words such as "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described herein as "such as" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "or" for example "is intended to present related concepts in a concrete fashion.
In the description of the embodiments of the present application, the term "plurality" means two or more. For example, a plurality of systems means two or more systems, and a plurality of screen terminals means two or more screen terminals. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating an indicated technical feature. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
Referring to fig. 1 and 2, a gas drainage device for a highway tunnel crossing an steep coal seam disclosed by the invention comprises a suction pipe 3, a suction device 1 and a gas storage device 2, wherein when in use, holes are drilled on a wall surface needing to drain gas so as to form a plurality of gas drainage holes, the suction pipe 3 is used for being inserted into the gas drainage holes, the suction device 1 is communicated with the suction pipe 3, negative pressure is formed at the suction pipe 3 when the suction device 1 works so as to drain the gas in the gas drainage holes, and the gas storage device 2 is used for storing the gas drained from the gas drainage holes; in this embodiment, the suction device 1 includes a gas pump, the gas storage device 2 includes a filtering portion and a gas storage tank, and in use, after the gas is filtered by the filtering portion, the gas is sent into the gas storage tank to be stored, and it can be understood that the filtering portion is a component for filtering the gas, and can filter dust, moisture and the like in the gas.
Referring to fig. 2 and 3, in the present embodiment, the suction pipe 3 is a cylindrical housing, the suction pipe 3 is hollow, one end of the suction pipe 3 is an insertion end 31, and the other end opposite to the insertion end is a tail end 32, and in use, the insertion end 31 is inserted into the gas extraction hole toward the direction of the gas extraction hole; the sealing element 4 (combining fig. 5) is arranged outside the suction pipe 3, the sealing element 4 is arranged around the suction pipe 3, a plurality of sealing elements 4 are distributed along the axial direction of the suction pipe 3, a negative pressure area 5 is formed between every two adjacent sealing elements 4, when the suction pipe 3 is inserted into a gas extraction hole, the side of the sealing element 4, which is away from the suction pipe 3, can be abutted against the inner wall of the gas extraction hole, so that the negative pressure area 5 forms a closed space, the suction pipe 3 of the negative pressure area 5 is provided with a suction hole 6, the suction hole 6 is communicated with a negative pressure pipe 7, the negative pressure pipe 7 is communicated with the suction device 1, and in operation, the suction device 1 extracts gas in the negative pressure area 5 through the negative pressure pipe 7, and at the moment, the gas enters the negative pressure cavity 8 through cracks and the like on a coal seam so as to be extracted by the negative pressure pipe 7. Wherein, each negative pressure area 5 has the negative pressure pipe 7 corresponding to it, namely negative pressure pipe 7 and negative pressure area 5 one-to-one, when using, negative pressure pipe 7 on a plurality of negative pressure areas 5 can communicate with suction device 1 simultaneously or alone, before using, let different negative pressure areas 5 communicate with suction device 1 in proper order according to the direction from inside to outside or outside to inside of gas extraction hole, then check data such as gas concentration etc. that each negative pressure area 5 draws, record negative pressure area 5 that the gas content is very low, and seal negative pressure pipe 7 of negative pressure area 5 that the gas content is very low, communicate negative pressure pipe 7 that other gas concentration meet the requirement with suction device 1 simultaneously, can draw gas to a plurality of negative pressure areas 5 simultaneously, and because the negative pressure area 5 that the air is more has been sealed during the extraction, the efficiency of gas is drawn to other negative pressure areas 5 is higher.
Wherein, be provided with negative pressure chamber 8 inside suction tube 3, negative pressure chamber 8 quantity is the same with negative pressure zone 5 quantity, and negative pressure chamber 8 and negative pressure zone 5 one-to-one, negative pressure zone 5 is enclosed by two sealing members 4 and suction tube 3 outer wall, and negative pressure chamber 8 is located suction tube 3 inside and is enclosed by suction tube 3 inner wall, negative pressure zone 5 communicates with negative pressure chamber 8 through suction hole 6, negative pressure tube 7 and negative pressure chamber 8 intercommunication, in this embodiment, suction hole 6 quantity is a plurality of, and a plurality of suction holes 6 are arranged on suction tube 3 of negative pressure zone 5 along the circumference and the axial array of suction tube 3, in this embodiment, negative pressure chamber 8 is the annular cavity that is located suction tube 3, the central part of annular cavity forms the perforation 9 that supplies negative pressure tube 7 to pass through, during the use, a plurality of negative pressure tubes 7 get into suction tube 3 inside through perforation 9, and communicate with corresponding negative pressure chamber 8.
Referring to fig. 3 and 4, in use, the suction tube 3 needs to be inserted into or withdrawn from the gas extraction hole, so in this embodiment, for convenience in inserting or withdrawing the suction tube 3, the sealing member 4 is provided to include an inflatable bag 41, an inflatable tube 42 is connected to the inflatable bag 41, the inflatable bag 41 is inflated to be large, and is deflated to be capable of being contracted, so that the gas in the inflatable bag 41 can be discharged when the suction tube 3 is inserted or withdrawn from the suction tube 3, and convenience in operation is achieved at this time; and during normal operation, the outer periphery of the inflatable air bag 41 needs to be attached to the outer wall of the gas extraction hole, and at this time, gas is inflated into the inflatable air bag 41, so that the inflatable air bag 41 is inflated and attached to the inner wall of the gas extraction hole.
The inflatable airbag 41 can be made of elastic rubber materials, has good elasticity and is wear-resistant, in the embodiment, the inflatable airbag 41 is an annular component, the inflatable airbag 41 is detachably sleeved outside the suction tube 3, the cross section of the inflatable airbag 41 is pear-shaped, one side of the smaller cross section of the inflatable airbag 41 is located on the side of the suction tube 3, and one side of the larger cross section of the inflatable airbag 41 is used for being attached to the inner wall of the gas extraction hole. In use, the inflatable bags 41 with different sizes can be replaced according to the need, meanwhile, when the inflatable bags 41 are damaged, new inflatable bags 41 can be replaced, the inflatable bags 41 are distributed along the length direction of the suction tube 3, the adjacent inflatable bags 41 are communicated through the inflatable tube 42, the end parts of the inflatable tubes 42 extend to the tail ends 32, in use, because the tail ends 32 are close to the opening parts of the gas extraction holes, an operator can conveniently inflate or deflate the inflatable bags 41, and in order to facilitate the operation, in the embodiment, the end parts of the inflatable tubes 42 are also provided with the air valves 43, gas can be prevented from leaking from the inflatable bags 41 through the air valves 43, and meanwhile, the air can be quickly deflated when the subsequent gas needs to be deflated.
Referring to fig. 3 and 4, because the tunnel working condition is complicated, when the gas is extracted through the suction pipe 3, the suction pipe 3 needs to be fixed, the inflatable bag 41 will position the suction pipe 3 in the gas extraction hole in use, however, because the inflatable bag 41 has elasticity, the positioning effect of the inflatable bag 41 on the suction pipe 3 is poor, for this reason, the outer wall of the suction pipe 3 is hinged with the positioning rod 10, the rotation axis direction of the positioning rod 10 is perpendicular to the length direction of the suction pipe 3, the length of the positioning rod 10 is greater than the distance between the outer wall of the suction pipe 3 and the inner wall of the gas extraction hole, when the positioning rod 10 rotates, the positioning rod 10 can be supported between the suction pipe 3 and the inner wall of the gas extraction hole, meanwhile, the end of the positioning rod 10 away from the hinge shaft is the free end, the end close to the hinge shaft is the hinge end, and the free end of the positioning rod 10 is inclined towards the tail end 32 side in use, when the free end of the positioning rod 10 is abutted with the inner wall of the gas extraction hole, the suction pipe 3 is not easy to be separated from the gas extraction hole, thereby realizing effective fixation of the suction pipe 3, and improving the stability when extracting gas. In use, the positioning rods 10 can be arranged in a plurality of positions along the circumferential direction of the suction pipe 3, so that the stability of the suction pipe 3 during operation is improved, meanwhile, the positioning rods 10 can be distributed in a plurality of groups along the length direction of the suction pipe 3, in the embodiment, the positioning rods 10 are distributed in 3 positions along the circumferential direction of the suction pipe 3, and the positioning rods 10 are distributed in 3 groups along the length direction of the suction pipe 3.
Referring to fig. 3 and 4, in order to rotate the positioning rod 10 not to contact the inner wall of the gas extraction hole when the suction pipe 3 is taken and placed, the positioning rod 10 is linked with the inflatable air bag 41, when the inflatable air bag 41 is inflated, the positioning rod 10 gradually rotates towards the inner wall side of the gas extraction hole, so that the positioning rod 10 can be positioned when the suction pipe 3 works, and when the inflatable air bag 41 is deflated, the positioning rod 10 gradually moves away from the inner wall side of the gas extraction hole; in order to achieve the above object, the positioning rod 10 is located at least one of the air bags 41 toward the tail end 32 side, and the positioning rod 10 is connected to the air bag 41, the positioning rod 10 is connected to the air bag 41 close to itself, while the air bag 41 connected to the positioning rod 10 is located at the positioning rod 10 toward the insertion end 31 side, in order to facilitate rotation of the positioning rod 10 along with inflation and deflation of the air bag 41, the positioning rod 10 is connected to the air bag 41 close to the free end side, while the pleat 11 is provided on the air bag 41 between the free end and the hinged end of the positioning rod 10, so that the air bag 41 can push the positioning rod 10 toward the tail end 32 side after deflation, i.e., when the air bag 41 is deflated, there will be a tendency to push the positioning rod 10 away from the inner wall of the gas extraction hole, facilitating removal of the suction tube 3. Meanwhile, when the inflatable airbag 41 is inflated, the inflatable airbag 41 gradually expands, and under the action of the folds 11, the positioning rod 10 is more easily driven to rotate towards the inner wall side of the gas extraction hole, so that the positioning rod 10 is supported between the suction pipe 3 and the gas extraction hole. In this embodiment, the fold 11 is formed by folding the side wall of the inflatable bag 41, i.e. the length of the side wall of the inflatable bag 41 between the free end and the hinged end is larger than the length of the positioning rod 10, at this time, the inflatable bag 41 is fixed to the suction tube 3 at one end and the free end of the positioning rod 10, and therefore the inflatable bag 41 will automatically fold to form the fold 11.
Referring to fig. 3 and 4, when the suction pipe 3 is inserted into the gas extraction hole, the positioning rod 10 is rotated to a direction close to the outer wall of the suction pipe 3, at this time, the positioning rod 10 and the inflatable air bag 41 are both far away from the inner wall side of the gas extraction hole, then the suction pipe 3 is inserted into the gas extraction hole, and then the inflatable air bag 41 is inflated, at this time, the inflatable air bag 41 gradually expands between the gas extraction hole and the suction pipe 3, and at the same time, the inflatable air bag 41 drives the positioning rod 10 to be gradually close to the inner wall side of the gas extraction hole until the free end of the positioning rod 10 is abutted with the inner wall of the gas extraction hole, an operator extracts the suction pipe 3 out of the gas extraction hole by a certain distance, at this time, the positioning rod 10 is supported between the suction pipe 3 and the gas extraction hole, and the installation of the suction pipe 3 is completed. During disassembly, the inflatable air bag 41 is deflated firstly, then an operator pushes the suction pipe 3 to a certain distance into the gas extraction hole, so that the unloading force between the positioning rod 10 and the inner wall of the gas extraction hole is separated, and under the action of the folds 11, the positioning rod 10 rotates to be close to the outer wall side of the suction pipe 3, and then the suction pipe 3 is extracted outwards.
Wherein, outside the suction tube 3, an air bag seat 19 is arranged along the circumferential direction of the suction tube 3, and the air bag seat 19 protrudes out of the outer wall of the suction tube 3; the air bag seat 19 is provided with an annular groove with the central axis of the suction pipe 3 as a central axis, the cross section of the annular groove is arc-shaped, the inflatable air bag 41 is sleeved in the annular groove, and as shown in fig. 4, the positioning rod 10 is hinged on the air bag seat 19, so that the free end of the positioning rod 10 can rotate to a position closer to the outer wall of the suction pipe 3, and the suction pipe 3 is convenient to install and detach; while the inflation tube 42 is disposed along the length of the suction tube 3, the air gate 43 end of the inflation tube 42 extends through the airbag housing 19 and through the rear end 32, and the air gate 43 end extends through the suction tube 3 and through the perforations 9.
Referring to fig. 3 and 5, in the process of extracting gas, since the periphery of the opening of the gas extraction hole is close to the outside, a gap may be formed at the opening of the gas extraction hole to be in communication with the outside, so that more outside air is extracted in the process of extracting gas, the gas extraction efficiency is low, for this reason, a sealing portion 12 is provided at the tail end 32 side of the suction pipe 3, the shape of the sealing portion 12 is cylindrical, the diameter of the sealing portion 12 is larger than that of the suction pipe 3, when the suction pipe 3 is inserted into the gas extraction hole, the sealing portion 12 is simultaneously inserted into the gas extraction hole, and the sealing portion 12 is positioned at the opening side of the gas extraction hole. A connecting cavity 13 is arranged in the sealing part 12, all the negative pressure pipes 7 are communicated with the connecting cavity 13, and meanwhile, a sealing piece 14 is arranged at the communication part of the negative pressure pipes 7 and the connecting cavity 13, in the embodiment, the sealing piece 14 is an opening and closing cover connected with the negative pressure pipes 7 at the end of the connecting cavity 13, wherein the negative pressure pipes 7 can be metal pipelines, and the sealing piece 14 is in threaded connection with the end part of the negative pressure pipes 7; meanwhile, the air valve 43 end of the air charging tube 42 is positioned in the connecting cavity 13, the connecting cavity 13 is arranged in a hollowed-out way away from the tail end 32, and in use, the air valve 43 and the sealing piece 14 are operated through the hollowed-out part of the connecting cavity 13.
Referring to fig. 3 and 5, a pressure plate 15 is provided at the end of the sealing portion 12 facing away from the suction pipe 3, and the pressure plate 15 will abut against the side wall of the gas extraction hole opening when the sealing portion 12 is positioned in the suction hole 6, thereby limiting the depth of insertion of the suction pipe 3. In the embodiment, the pressure plate 15 is in threaded connection with the sealing part 12, and in specific use, the relative position between the pressure plate 15 and the sealing part 12 can be adjusted at any time, so that the insertion depth of the suction pipe 3 can be adjusted; simultaneously can make the connecting chamber 13 communicate or seal with the external world through dismantling the installation pressure disk 15 to conveniently aerify or the gassing operation to inflating gasbag 41, dismantle pressure disk 15 from sealing portion 12, will make connecting chamber 13 switch on with the external world, can operate valve 43 this moment, install pressure disk 15 to sealing portion 12 on the back, can make connecting chamber 13 form airtight cavity, make things convenient for suction device 1 to form the negative pressure in connecting chamber 13.
Referring to fig. 5, a sealing ring 16 is disposed at the end of the sealing portion 12 far away from the pressure plate 15, the sealing ring 16 is sleeved on the outer ring of the sealing portion 12, a grouting cavity 17 is formed between the sealing ring 16 and the pressure plate 15, namely, the sealing ring 16, the pressure plate 15 and the outer ring of the sealing portion 12 enclose the grouting cavity 17, when the sealing portion 12 is inserted into a gas extraction hole, a closed space is formed between the grouting cavity 17 and the inner wall of the gas extraction hole, a grouting opening 18 for communicating the grouting cavity 17 with the outside is disposed on the pressure plate 15, in use, slurry is injected into the grouting cavity 17 through the grouting opening 18, in this embodiment, the slurry is cement slurry, and a channel communicated with the outside at the opening of the gas extraction hole can be plugged through the slurry, so that the gas extraction efficiency is improved. In order to facilitate the subsequent taking out of the sealing part 12, the outer ring of the sealing part 12 in the grouting cavity 17 is provided with threads, so that the solidified slurry and the sealing part 12 form a threaded fit mode, when the grouting device is used, the suction pipe 3 is taken out by rotating the sealing part 12, the disassembly is simple and convenient, the sealing part 12 and the slurry are separated conveniently, the outer wall of the sealing part 12 is coated with a release agent before the grouting device is used, the outer wall of the sealing part 12 can be coated with a layer of plastic film in a better mode, and the plastic film is coated with the release agent.
The embodiment of the application also provides a gas drainage method for the road tunnel to penetrate through the steep coal seam, which comprises the following steps of:
a gas extraction hole is formed in a position where gas is required to be extracted;
inserting the suction pipe 3 into the gas extraction hole, and enabling the sealing piece 4 to be attached to the inner wall of the gas extraction hole;
the suction device 1 is communicated with different negative pressure pipes 7, and the concentration of the gas in the different negative pressure pipes 7 is detected respectively;
closing the negative pressure pipe 7 with higher air content, and communicating the negative pressure pipe 7 meeting the requirements with the suction device 1;
the suction device 1 sucks and stores the gas in the negative pressure pipe 7 in the gas storage device 2.
The implementation principle of the embodiment is as follows: inserting the suction pipe 3 into the gas extraction hole until the sealing part 12 enters the gas extraction hole, then inflating the inflatable airbag 41 until the inflatable airbag 41 fills the space between the suction pipe 3 and the gas extraction hole and then stops, and at the moment, the free end of the positioning rod 10 is in contact with the inner wall of the gas extraction hole;
the suction pipe 3 is moved to the outside of the gas extraction hole by a certain distance, and the suction pipe 3 is moved by a few centimeters in actual use, at the moment, the positioning rod 10 is supported between the suction pipe 3 and the gas extraction hole, then different negative pressure pipes 7 are communicated with the suction device 1, the gas concentration extracted by the different negative pressure pipes 7 is tested, the negative pressure pipes 7 with higher air concentration are closed by the sealing piece 14, and the rest negative pressure pipes 7 are communicated with the connecting cavity 13;
and then, rotating the pressure plate 15, enabling the pressure plate 15 to be abutted against the opening of the gas extraction hole and seal the opening of the gas extraction hole, injecting slurry into the slurry pressing cavity 17 through the slurry pressing opening 18, stopping until the pressure of the injected slurry reaches the set pressure, and starting to extract the gas after waiting for the slurry to solidify.
When the pressure plate 15 is disassembled, the pressure plate 15 is firstly rotated to separate the pressure plate 15 from the sealing part 12, then the air valve 43 is operated in the connecting cavity 13 to deflate the inflatable air bag 41, then the sealing part 12 is reversely rotated, under the action of the threads of the sealing part 12, the sealing part 12 and the suction pipe 3 move towards the inner side of the gas extraction hole, at the moment, the positioning rod 10 is separated from the inner wall of the gas extraction hole, then the sealing part 12 is rotated forwards, the sealing part 12 and the suction pipe 3 are taken out from the gas extraction hole together, and in the process, the sealing ring 16 is separated from the sealing part 12 under the action of solidified slurry, so that the sealing part 12 and the suction pipe 3 are not prevented from being extracted from the gas extraction hole.
The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (10)
1. The utility model provides a highway tunnel passes through steep coal seam gas drainage device which characterized in that includes:
the suction pipe (3) is used for extending into the gas extraction hole to extract gas, the suction pipe (3) comprises an insertion end (31) and a tail end (32), and the insertion end (31) is used for facing the bottom end of the gas extraction hole;
a suction device (1) communicated with the suction pipe (3) and used for providing negative pressure for the suction pipe (3) to suck gas;
the gas storage device (2) is used for storing the extracted gas;
wherein encircle suction tube (3) is provided with sealing member (4), sealing member (4) have a plurality ofly along the length direction interval distribution of suction tube (3), form negative pressure district (5) between adjacent sealing member (4), be provided with suction hole (6) on suction tube (3) in negative pressure district (5), suction hole (6) intercommunication has negative pressure pipe (7), negative pressure pipe (7) and suction device (1) intercommunication, suction tube (3) of different negative pressure district (5) are through different negative pressure pipe (7) and suction device (1) intercommunication.
2. The device for exhausting gas through the steep coal seam by using the highway tunnel according to claim 1, wherein a negative pressure cavity (8) is formed in the suction pipe (3) in a region corresponding to the negative pressure region (5), the negative pressure region (5) and the negative pressure cavity (8) are in one-to-one correspondence, the suction hole (6) is communicated with the corresponding negative pressure cavity (8), the negative pressure cavity (8) is in one-to-one correspondence with the negative pressure pipe (7), and the negative pressure pipe (7) is communicated with the corresponding negative pressure cavity (8).
3. The device for pumping out the gas of the road tunnel passing through the steep coal seam according to claim 2, wherein the negative pressure pipe (7) is positioned inside the suction pipe (3), and a perforation (9) for the negative pressure pipe (7) to pass through is arranged in the suction pipe (3).
4. The gas drainage device for the road tunnel through the steep coal seam according to claim 1, wherein the sealing element (4) comprises an inflatable air bag (41) and an inflatable tube (42), the inflatable air bags (41) are communicated with each other, the inflatable air bag (41) is arranged around the suction tube (3), the side, away from the suction tube (3), of the inflatable air bag (41) is used for being abutted against the inner wall of the gas drainage hole, one end of the inflatable tube (42) is located on the side of the tail end (32), and one end, located on the side of the tail end (32), of the inflatable tube (42) is provided with a valve (43).
5. The device for exhausting gas from a coal seam crossing over a steep seam according to claim 4, wherein at least one of said inflatable air bags (41) is provided with a positioning rod (10) on a side facing the tail end (32), said positioning rod (10) is hinged to the outer wall of the suction pipe (3) along a direction perpendicular to the length direction of the suction pipe (3), the length of the hinged end of said positioning rod (10) from the free end of said positioning rod (10) is greater than the distance between the outer wall of the suction pipe (3) and the inner wall of the gas extraction hole, the free end of said positioning rod (10) is inclined to a side near the tail end (32), said positioning rod (10) is connected with the inflatable air bag (41) located on a side of the positioning rod (10) far from the tail end (32) and closest to the positioning rod (10), and said positioning rod (10) is driven to rotate the free end of said positioning rod (10) to abut against the inner wall of the gas extraction hole when said inflatable air bag (41) is inflated.
6. The gas drainage device for the road tunnel through the steep coal seam according to claim 5, wherein the joint of the inflatable air bag (41) and the positioning rod (10) is located at the side of the positioning rod (10) far away from the hinged end, folds (11) are arranged on the side wall of the inflatable air bag (41) connected with the positioning rod (10), and the inflatable air bags (41) are stacked to form the folds (11).
7. The highway tunnel crossing steep coal seam gas drainage device according to claim 1, characterized in that, tail end (32) is provided with sealing portion (12), be provided with connecting chamber (13) in sealing portion (12), negative pressure pipe (7) and connecting chamber (13) intercommunication, negative pressure pipe (7) are provided with connecting chamber (13) intercommunication department and are used for sealing negative pressure pipe (7) closure piece (14), suction device (1) and connecting chamber (13) intercommunication, threaded connection has pressure disk (15) on sealing portion (12), pressure disk (15) are used for sealing the opening of gas extraction hole.
8. The device for draining gas in the road tunnel through the steep coal seam according to claim 7, wherein a sealing ring (16) for being abutted against the inner wall of the gas extraction hole is arranged at the end, deviating from the pressure plate (15), of the sealing part (12), a grouting cavity (17) is formed between the sealing ring (16) and the pressure plate (15), a grouting opening (18) communicated with the grouting cavity (17) is arranged on the pressure plate (15), and the grouting opening (18) is used for being connected with a grouting pipeline.
9. The device for pumping out the gas of the road tunnel passing through the steep coal seam according to claim 8, wherein the sealing ring (16) is sleeved on the outer wall of the sealing part (12), threads are arranged on the outer wall of the sealing part (12) where the grouting cavity (17) is located, and the inner wall of the grouting cavity (17) is coated with a release agent.
10. A method for pumping gas from a road tunnel crossing an steeply inclined coal seam, which is characterized by using the gas pumping device for pumping gas from the road tunnel crossing the steeply inclined coal seam according to any one of claims 1-9, and comprising the following steps:
a gas extraction hole is formed in a position where gas is required to be extracted;
inserting the suction pipe (3) into the gas extraction hole, and enabling the sealing piece (4) to be attached to the inner wall of the gas extraction hole;
the suction device (1) is communicated with different negative pressure pipes (7), and the concentration of the gas in the different negative pressure pipes (7) is detected respectively;
closing a negative pressure pipe (7) with higher air content, and communicating the negative pressure pipe (7) meeting the requirements with the suction device (1);
the suction device (1) extracts and stores the gas in the negative pressure pipe (7) in the gas storage device (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311459331.7A CN117569864A (en) | 2023-11-03 | 2023-11-03 | Device and method for exhausting gas of road tunnel penetrating through steep coal seam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311459331.7A CN117569864A (en) | 2023-11-03 | 2023-11-03 | Device and method for exhausting gas of road tunnel penetrating through steep coal seam |
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