CN114320219A - Karst borehole fracture water rapid plugging device and method - Google Patents
Karst borehole fracture water rapid plugging device and method Download PDFInfo
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- CN114320219A CN114320219A CN202111577979.5A CN202111577979A CN114320219A CN 114320219 A CN114320219 A CN 114320219A CN 202111577979 A CN202111577979 A CN 202111577979A CN 114320219 A CN114320219 A CN 114320219A
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- liquid nitrogen
- karst
- water
- borehole
- plugging
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 title claims abstract description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 162
- 239000007788 liquid Substances 0.000 claims abstract description 94
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 81
- 238000005553 drilling Methods 0.000 claims abstract description 19
- 238000007710 freezing Methods 0.000 claims description 10
- 230000008014 freezing Effects 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 12
- 230000008016 vaporization Effects 0.000 abstract description 7
- 238000009834 vaporization Methods 0.000 abstract description 7
- 239000010426 asphalt Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 238000001816 cooling Methods 0.000 description 5
- 239000004568 cement Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
The invention discloses a device and a method for quickly plugging karst drilling fracture water, and belongs to the technical field of water plugging of karst drilling fractures. The method comprises the following steps: liquid nitrogen is conveyed into the flow divider under the action of the low-temperature liquid pump; opening a conveying pipeline switching device to enable liquid nitrogen to enter a liquid nitrogen conveying hard pipe; injecting liquid nitrogen into the karst borehole fractures, the apparatus comprising: a large-capacity liquid nitrogen storage tank; a cryogenic liquid pump connected to the high capacity liquid nitrogen storage tank; the flow divider is connected with the low-temperature liquid pump, and a conveying pipeline switching device is arranged at the output end of the flow divider; and the liquid nitrogen conveying hard pipe is connected with the conveying pipeline switching device. According to the invention, the characteristics of vaporization and release of cold energy by liquid nitrogen are adopted to freeze the fracture water of the drill hole in the project of the karst region, so that the fracture water is prevented from seeping out, and the plugging effect is achieved.
Description
Technical Field
The invention relates to the technical field of water seal plugging of karst drilling cracks, in particular to a device and a method for quickly plugging karst drilling cracks.
Background
Karst areas contain a large amount of underground water, and when tunnels are built in the karst areas, the tunnels inevitably pass through water-rich areas, and water-rich spaces often exist above the tunnel spaces. Because the karst water has a corrosive effect on the rock mass, and the effect of the karst water on the rock mass below the karst water is larger under the action of gravity, the rock mass at the lower part of the water-rich space can gradually form karst cracks and is finally developed and connected to the tunnel space. Because tunnel engineering belongs to concealed engineering, it is higher to waterproof requirement, and can produce great influence to traffic or tunnel structure after the water gets into the tunnel section, so need to carry out the shutoff to the karst crack water that gets into the tunnel space especially the construction stage along the karst crack water that the drilling pore entered the tunnel space and handle.
At present, in China, grouting plugging is mostly adopted for underground engineering crack water seepage diseases in karst areas or a condenser is adopted for cooling to freeze a water body to achieve the plugging effect.
The grouting plugging is mostly performed by adopting materials with certain expansion performance, such as cement-based composite materials, modified chemical grouting materials, hot asphalt and the like. If hot asphalt is injected into the hole of the drill hole, the hot asphalt is rapidly cooled when meeting fracture water, the volume of the hot asphalt is expanded and the hot asphalt is filled in the hole of the drill hole, and the volume of the asphalt after the cooling expansion is slightly larger than the volume of the hole of the drill hole, so the asphalt has an extrusion effect on the hole wall, and can be used as a fracture water blocking material. Other materials are mostly used for plugging fracture water by adopting the principle.
The freezing treatment of the condenser is to use a condensing system to reduce the temperature of the fractured water body and freeze so as to plug the fractured water body. Usually, a medium with good thermal conductivity is inserted into the water body, and then the water body is cooled and frozen to achieve the plugging effect.
Most grouting plugging materials such as hot asphalt or cement-based composite material modified chemical grouting materials have certain pollution to water, and when the materials are used in large quantities to plug pore fracture water in karst areas, certain pollution is inevitably caused to underground water systems, so that irreversible environmental pollution is caused.
Because equipment such as condensers are installed with higher difficulty and are not easy to install on site, and when the condensers are used for cooling and freezing the water body, the time for reducing the environmental temperature to the freezing point of the required fissure water is longer. During the continuous cooling period of the condenser, the water in the cracks of the drill holes cannot be effectively blocked, so that the condenser has certain limitation.
In consideration of the above problems, the invention provides a karst borehole fracture water rapid plugging device and a karst borehole fracture water rapid plugging method, which release a large amount of cold energy when liquid nitrogen is vaporized, so that the environment temperature is reduced, and finally the aims of freezing a fracture water body and plugging a borehole are achieved. As the vaporized liquid nitrogen is nitrogen, the invention has no pollution to the environment, and the invention adopts the liquid nitrogen to plug the water on the train mat, thereby effectively avoiding the pollution to the environment and simultaneously achieving a certain plugging effect.
Disclosure of Invention
The invention aims to provide a karst drilling fracture water rapid plugging device and a method, which aim to solve the problems in the background technology: grouting plugging materials such as hot asphalt or cement-based composite material modified chemical grouting materials have certain pollution to water, and can cause certain pollution to underground washing; because equipment such as condenser installation degree of difficulty is higher, be difficult for on-the-spot installation etc. and when freezing through the condenser to the water, it is longer to fall the freezing point required time of required crack water with ambient temperature, in the condenser continuous cooling period, can not effectually carry out the shutoff to drilling crack water, so have certain limitation.
In order to achieve the purpose, the invention provides the following technical scheme:
the method for quickly plugging karst drilling fracture water comprises the following steps:
liquid nitrogen is vaporized and released in the karst borehole fractures, so that water in the karst borehole fractures is frozen.
Further, the method is characterized in that liquid nitrogen is released in karst borehole fractures by vaporization to freeze water in the karst borehole fractures, and mainly comprises the following steps:
storing liquid nitrogen in a large-capacity liquid nitrogen storage tank;
the liquid nitrogen is conveyed into the flow divider through a liquid nitrogen conveying pipe under the action of the low-temperature liquid pump, and a certain amount of liquid nitrogen is stored in the flow divider;
opening a conveying pipeline switching device connected with the front end of the flow divider to enable liquid nitrogen to enter a liquid nitrogen conveying hard pipe;
and (3) spraying liquid nitrogen into the karst borehole fracture through a liquid nitrogen conveying hard tube to vaporize and refrigerate the nitrogen and freeze water in the karst borehole fracture.
A karst drilling crack water quick plugging device includes:
a large-capacity liquid nitrogen storage tank;
the input end of the low-temperature liquid pump is connected with the high-capacity liquid nitrogen storage tank through a liquid nitrogen delivery pipe;
the flow divider is connected with the output end of the low-temperature liquid pump through a liquid nitrogen conveying pipe, and the output end of the flow divider is provided with a plurality of conveying pipeline switching devices;
and the liquid nitrogen conveying hard pipe is connected with the conveying pipeline switching device through a liquid nitrogen conveying pipe.
Further preferably, a check valve is further arranged on the liquid nitrogen delivery pipe between the large-capacity liquid nitrogen storage tank and the cryogenic liquid pump.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts the characteristic that cold energy is released by vaporization of liquid nitrogen to freeze the water in the cracks of the drill holes in the project of the karst area, so as to prevent the water from seeping out and achieve the plugging effect. Utilize liquid nitrogen vaporization release cold energy great, the very fast characteristics of speed, carry the hard tube through the liquid nitrogen and export liquid nitrogen to the drilling inside, combine the less characteristics of narrow and small space energy loss, reduce the ambient temperature in the drilling in the short time, make the crack water freeze fast to reach the effect of quick shutoff, this device adopts cryogenic fluid pump to provide transmission power, carries the liquid nitrogen through the liquid nitrogen conveyer pipe that cold treatment had in advance to the inside quick shutoff of crack water that carries on of drilling.
Compared with the traditional grouting plugging and the traditional method for plugging the crack water by freezing the water body by the condenser pipe, the method has higher speed for plugging the crack water. The components of the device do not need to be customized, are easy to obtain, and have more remarkable use effect. Most of the equipment used by the device can be recycled, and the economic loss of the equipment after operation is small.
Drawings
Fig. 1 is a schematic view of the overall structure of the device.
Reference numerals: 1. a large-capacity liquid nitrogen storage tank; 2. a liquid nitrogen delivery pipe; 3. a cryogenic liquid pump; 4. a flow divider; 5. a delivery conduit switching device; 6. and liquid nitrogen conveying hard pipes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to FIG. 1.
Karst drilling crack water quick plugging device:
the invention relates to a principle of freezing a water body by releasing cold energy through vaporization of liquid nitrogen and realizing quick plugging of karst drilling crack water by controlling liquid nitrogen output, which is provided with a large-capacity liquid nitrogen storage tank 1 and a liquid nitrogen delivery pipe 2 with a certain length, wherein the front end of the liquid nitrogen delivery pipe 2 is provided with a one-way valve, the one-way valve is connected with a small-sized cryogenic liquid pump 3 and can control the input and output speed of liquid nitrogen, the output end of the small-sized cryogenic liquid pump 3 is connected with a liquid nitrogen splitter 4 through the liquid nitrogen delivery pipe 2, the output end of the splitter 4 is connected with a plurality of delivery pipeline switching devices 5 capable of controlling pipeline switching, and the front end of each delivery pipeline switching device 5 is connected with a liquid nitrogen delivery hard pipe 6 through the liquid nitrogen delivery pipe 2.
After the power supply is turned on, liquid nitrogen flows through the liquid nitrogen conveying pipe 2 from the large-capacity liquid nitrogen storage tank 1 under the action of the low-temperature liquid pump 3, and a certain amount of liquid nitrogen is stored in the flow divider 4 at the front end of the low-temperature liquid pump 3. After opening transfer piping switching device 5 that shunt 4 front end is connected, the liquid nitrogen in shunt 4 passes through liquid nitrogen conveyer pipe 2 and gets into the liquid nitrogen conveying hard tube 6 that the pipeline front end is connected, finally gets into drilling depths, stops to vaporize, refrigerate in drilling depths, freezes downthehole crack water to play the effect of quick shutoff crack water in the karst area drilling work progress.
Thereby:
according to the invention, by utilizing the characteristics of large cold energy released by vaporization of liquid nitrogen and high vaporization speed, the liquid nitrogen is output to the interior of the drill hole through the liquid nitrogen conveying hard pipe, and the characteristic of small energy dissipation in a narrow space is combined, so that the ambient temperature in the drill hole is reduced in a short time, the crack water is rapidly frozen, and the speed of plugging the crack water is higher than that of plugging the crack water by traditional grouting plugging and freezing water bodies of a condensing pipe.
The components of the device do not need to be customized, are easy to obtain, and have more remarkable use effect.
Most of the equipment used by the device can be recycled, and the economic loss of the equipment after operation is small.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The karst drilling fracture water rapid plugging method is characterized by comprising the following steps:
liquid nitrogen is vaporized and released in the karst borehole fractures, so that water in the karst borehole fractures is frozen.
2. The method for rapidly plugging karst borehole fracture water according to claim 1, wherein the method for freezing the karst borehole fracture water by using liquid nitrogen vaporized and released in the karst borehole fracture mainly comprises the following steps:
storing liquid nitrogen in a large-capacity liquid nitrogen storage tank (1);
liquid nitrogen is conveyed into the flow divider (4) through the liquid nitrogen conveying pipe (2) under the action of the low-temperature liquid pump (3), and a certain amount of liquid nitrogen is stored in the flow divider (4);
opening a conveying pipeline switching device (5) connected with the front end of the flow divider (4) to enable liquid nitrogen to enter a liquid nitrogen conveying hard pipe (6);
and (3) spraying liquid nitrogen into the karst borehole fracture through a liquid nitrogen conveying hard tube (6) to vaporize and refrigerate the nitrogen and freeze water in the karst borehole fracture.
3. The utility model provides a quick plugging device of karst drilling crack water which characterized in that includes:
a large-capacity liquid nitrogen storage tank (1);
the input end of the low-temperature liquid pump (3) is connected with the high-capacity liquid nitrogen storage tank (1) through a liquid nitrogen delivery pipe (2);
the flow divider (4) is connected with the output end of the low-temperature liquid pump (3) through a liquid nitrogen conveying pipe (2), and a plurality of conveying pipeline switching devices (5) are arranged at the output end of the flow divider (4);
and the liquid nitrogen conveying hard pipe (6) is connected with the conveying pipeline switching device (5) through a liquid nitrogen conveying pipe (2).
4. The device for rapidly plugging karst borehole fracture water according to claim 3, characterized in that a one-way valve is further arranged on the liquid nitrogen delivery pipe (2) between the large-capacity liquid nitrogen storage tank (1) and the cryogenic liquid pump (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111577979.5A CN114320219A (en) | 2021-12-22 | 2021-12-22 | Karst borehole fracture water rapid plugging device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111577979.5A CN114320219A (en) | 2021-12-22 | 2021-12-22 | Karst borehole fracture water rapid plugging device and method |
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| CN114320219A true CN114320219A (en) | 2022-04-12 |
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| CN202111577979.5A Pending CN114320219A (en) | 2021-12-22 | 2021-12-22 | Karst borehole fracture water rapid plugging device and method |
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