CN113356927A - Underground fireproof and explosion-proof airtight isolation system and construction method thereof - Google Patents
Underground fireproof and explosion-proof airtight isolation system and construction method thereof Download PDFInfo
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- CN113356927A CN113356927A CN202110817688.2A CN202110817688A CN113356927A CN 113356927 A CN113356927 A CN 113356927A CN 202110817688 A CN202110817688 A CN 202110817688A CN 113356927 A CN113356927 A CN 113356927A
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- 229910000831 Steel Inorganic materials 0.000 claims description 10
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- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/103—Dams, e.g. for ventilation
-
- 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
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
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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)
- Building Environments (AREA)
Abstract
The invention discloses an underground fireproof and explosion-proof closed isolation system and a construction method thereof, wherein the underground fireproof and explosion-proof closed isolation system comprises a roadway, a first wall body, a second wall body, a first extraction pipe, a second extraction pipe, a water injection pipe, a filling pipe and a water injection and drainage pipe; the first wall body with the second wall body sets up in the tunnel at interval, first wall body with there is inclosed filling area at the interval between the second wall body, it has the colloid fluid to fill in the filling area. The invention discloses an underground fireproof and explosion-proof closed isolation system and a construction method thereof. The colloidal fluid has strong plugging capability, can plug the gaps of the first wall body and the second wall body or the cracks generated in the use process, improves the sealing property of the filled wall body, and can bear stronger impact in the moment of explosion by combining with the first wall body and the second wall body to form an organic whole.
Description
Technical Field
The invention relates to the technical field of underground fire prevention, in particular to an underground fire-proof explosion-proof closed isolation system and a construction method thereof.
Background
Coal spontaneous combustion fire disasters in China are serious, coal bed spontaneous combustion, harmful gas diffusion and gas explosion accidents all the time seriously restrict the development of the coal industry to the safe and efficient technical industry. Therefore, after the stoping of the fully mechanized coal mining face of the coal mine is finished, in order to avoid potential safety hazards caused by the spontaneous combustion of residual coal due to the fact that air enters a goaf or harmful gas in the goaf enters an adjacent mining area, stoping roadways on two sides of the face need to be closed in time, and an easily spontaneous combustion area, a harmful gas source and a gas gathering area are usually closed by building a fireproof and explosion-proof closed wall.
At present, the sealing walls commonly adopted in mines have certain limitations, common traditional sealing modes such as wood plate sealing walls, masonry sealing walls, concrete sealing walls, multilayer mixed sealing walls and the like have certain effects through practical field application, but other constructions need to consume a large amount of manpower, material resources and construction time, the stone, the wood plates, the loess and the like belong to rigid materials, and the constructed ventilation facilities of the sealing walls are easy to collapse, crack and the like, so that the air leakage of the sealing walls is caused, and the maintenance operation is required frequently.
Disclosure of Invention
The invention aims to provide an underground fireproof and explosion-proof closed isolation system with good sealing effect and convenient construction and a construction method thereof.
The technical scheme of the invention provides an underground fireproof and explosion-proof closed isolation system which comprises a roadway, a first wall body, a second wall body, a first extraction pipe, a second extraction pipe, a water injection pipe, a filling pipe and a water injection and drainage pipe;
the first wall body and the second wall body are arranged in a roadway at intervals, and the first wall body is close to a gob;
a closed filling area is arranged between the first wall body and the second wall body at intervals, and colloidal fluid is filled in the filling area;
the first extraction pipe and the water injection pipe sequentially penetrate through the second wall, the filling area and the first wall from outside to inside respectively and are inserted into one side, close to the goaf, of the first wall;
the second extraction pipe, the filling pipe and the injection and discharge pipe respectively penetrate through the second wall from outside to inside and are inserted into the filling area;
the first extraction pipe, the filling pipe, the second extraction pipe, the water injection pipe and the water injection and drainage pipe are sequentially arranged from top to bottom in the vertical direction;
valves are respectively arranged on the first extraction pipe, the filling pipe, the second extraction pipe, the water injection pipe and the water injection and drainage pipe.
In one optional technical scheme, the colloidal fluid is formed by mixing super absorbent resin and water.
In one optional technical scheme, the super absorbent resin powder enters the filling area through the filling pipe, and water enters the filling area through the drainage pipe.
In one alternative embodiment, the colloidal fluid is a non-newtonian fluid that increases in viscosity upon impact.
In an optional technical solution, the filling area is filled with the colloidal fluid.
In one optional technical scheme, grooves are respectively formed in positions, corresponding to the first wall body and the second wall body, of a bottom plate, a top plate and a roadway side of the roadway;
the peripheral edges of the first wall body and the second wall body are embedded in the grooves.
In an optional technical scheme, the first wall and the second wall are respectively constructed by bricks, and waterproof coating layers are respectively coated on the surfaces of the first wall and the second wall.
In one optional technical scheme, two bricks which are adjacent up and down are arranged in a staggered manner.
In one optional technical scheme, the filling pipe and the injection and drainage pipe are respectively plastic pipes;
the first extraction pipe, the second extraction pipe and the water injection pipe are respectively steel pipes, and anti-corrosion layers are coated on the steel pipes.
The technical scheme of the invention also provides a construction method of the underground fireproof and explosion-proof closed isolation system, which comprises the following steps:
s001: constructing a first wall body and a second wall body at a preset position of a roadway, and installing a first extraction pipe, a second extraction pipe, a water injection pipe, a filling pipe and a water injection and drainage pipe when constructing the first wall body and the second wall body;
s002: injecting water into a filling area between the first wall body and the second wall body through the filling and discharging pipes, and simultaneously filling colloid into the filling area between the first wall body and the second wall body through the filling pipes to form a material;
s003: and stopping operation when the filling area is filled, and closing the valves on the filling pipe and the discharging pipe.
By adopting the technical scheme, the method has the following beneficial effects:
the invention provides an underground fireproof and explosion-proof closed isolation system and a construction method thereof. The colloidal fluid has strong plugging capability, can plug the gaps of the first wall body and the second wall body or the cracks generated in the use process, improves the sealing property of the filled wall body, and can bear stronger impact in the moment of explosion by combining with the first wall body and the second wall body to form an organic whole. When gas explosion happens underground, the colloidal fluid can bear shock waves so as to protect the first wall body and the second wall body and reduce the damage to the wall bodies. The colloidal fluid can also play a role in extinguishing fire, has the functions of stopping the spread of gas explosion fire smoke, preventing the expansion of gas explosion accidents and improving the overall disaster prevention and resistance of the mine.
In addition, the underground fireproof and explosion-proof closed isolation system is extremely easy to maintain, and only water or slurry needs to be added for supplement after the moisture of the colloidal fluid is lost.
The underground fireproof and explosion-proof closed isolation system and the construction method thereof provided by the invention have the advantages of convenience in construction, easiness in operation and better durability than that of a pure water seal.
Drawings
FIG. 1 is a schematic structural diagram of a downhole fire and explosion protection containment isolation system provided in an embodiment of the present invention;
FIG. 2 is a schematic layout diagram of the first wall, the second wall, the first extraction pipe, the second extraction pipe, the water injection pipe, the filling pipe and the water injection and drainage pipe.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1-2, the underground fireproof and explosion-proof closed isolation system provided by an embodiment of the present invention includes a roadway 100, a first wall 1, a second wall 2, a first extraction pipe 5, a second extraction pipe 6, a water injection pipe 8, a filling pipe 7, and a water injection and discharge pipe 9.
The first wall 1 and the second wall 2 are arranged in the roadway 100 at intervals, and the first wall 1 is close to the goaf.
A sealed filling area 3 is arranged between the first wall body 1 and the second wall body 2, and the filling area 3 is filled with colloidal fluid 4.
The first extraction pipe 5 and the water injection pipe 8 sequentially penetrate through the second wall body 2, the filling area 3 and the first wall body 1 from outside to inside respectively, and are inserted into one side, close to the goaf, of the first wall body 1.
The second extraction pipe 6, the filling pipe 7 and the injection and discharge pipe 9 respectively penetrate through the second wall body 2 from outside to inside and are inserted into the filling area 3.
Wherein, in the vertical direction, the first extraction pipe 5, the filling pipe 7, the second extraction pipe 6, the water injection pipe 8 and the water injection and discharge pipe 9 are sequentially arranged from top to bottom.
The first extraction pipe 5, the filling pipe 7, the second extraction pipe 6, the water injection pipe 8 and the water injection and drainage pipe 9 are respectively provided with a valve 10.
The underground fireproof and explosion-proof closed isolation system provided by the invention adopts a wall filling mode to realize fireproof and explosion-proof.
The roadway 100 is communicated with the goaf, a first wall body 1 and a second wall body 2 are sequentially constructed in the roadway 100 close to the outer side of the goaf, the first wall body 1 is close to the goaf, and the second wall body 2 is located on the outer side of the first wall body 1. The second wall body 2 and the first wall body 1 are arranged at intervals, and a closed filling area 3 is formed between the first wall body 1 and the second wall body 2. The colloidal fluid 4 is filled in the filling zone 3. The colloidal fluid 4 is a liquid glue with certain viscosity and capable of flowing. The first wall body 1, the colloidal fluid 4 and the second wall body 2 form a filling wall body. The colloidal fluid 4 has strong plugging capability, can plug the gaps of the first wall body 1 and the second wall body 2 or the cracks generated in the use process, and improves the sealing property of the filled wall body. The colloidal fluid 4 is combined with the first wall body 1 and the second wall body 2 to form an organic whole, and can bear stronger impact at the moment of explosion. When gas explosion happens underground, the colloidal fluid 4 can bear shock waves so as to protect the first wall body 1 and the second wall body 2 and reduce the damage to the wall bodies. The colloid fluid 4 can also play a role in extinguishing fire, preventing high-temperature fire smoke generated after gas explosion from igniting and detonating gas and coal dust outside the second wall body 2, stopping the propagation of the gas explosion fire smoke, preventing the expansion of gas explosion accidents, and improving the overall disaster prevention and resistance of the mine.
The first extraction pipe 5 penetrates through the second wall body 2, the filling area 3 and the first wall body 1, the inner end of the first extraction pipe 5 is inserted into the inner side of the first wall body 1, the outer end of the first extraction pipe 5 is located on the outer side of the second wall body 2, and a valve 10 is arranged on the outer end of the first extraction pipe 5. The outer end of the first extraction pipe 5 can be connected with extraction equipment. After the wall is filled, the gas inside the first wall 1 can be extracted through extraction equipment, so that the gas components can be analyzed through a monitoring instrument, the internal gas content, the oxygen content and the like can be analyzed, and the condition of the inner side of the filled wall can be known.
The water injection pipe 8 passes through the second wall body 2, the filling area 3 and the first wall body 1, the inner of the water injection pipe 8 is inserted in the inner side of the first wall body 1, the outer end of the water injection pipe 8 is positioned in the outer side of the second wall body 2, and the outer end of the water injection pipe 8 is provided with a valve 10. The water injection pipe 8 may be connected to a water injection device.
According to needs, can play the effect of lowering the temperature and preventing and extinguishing fire to the inboard water injection of first wall body 1 through water injection pipe 8.
And a second extraction pipe 6 penetrates through the second wall body 2 and is inserted into the filling area 3, and a valve 10 is arranged at the end part of the second extraction pipe 6. The second extraction pipe 6 is connected with extraction equipment, can extract the glue solution in the filling area 3, is used for analyzing the components of the glue solution, and can monitor the condition of the colloidal fluid in real time to see whether the components of the glue solution meet the requirements.
A filling tube 7 is inserted through the second wall 2 and into the filling zone 3, the end of the filling tube 7 being provided with a valve 10. The filling pipe 7 is connected to a filling device for injecting a colloidal powder material or the like, for example, silica gel powder or the like, into the filling zone 3.
The injection and discharge pipe 9 penetrates through the second wall body 2 and is inserted into the filling area 3, and a valve 10 is arranged at the end part of the injection and discharge pipe 9. The filler pipe 9 can be connected to a filling device for filling water into the filling area 3 during filling. When the colloidal powder material is mixed with water, a colloidal fluid 4 is formed. The proportion of the colloid powder material and the water can be set according to actual needs, and corresponding additives and the like can be added.
When the second wall body 2 and the first wall body 1 need to be dismantled, the colloidal fluid 4 can be discharged through the injection and discharge pipe 9, and then the second wall body 2 and the first wall body 1 are dismantled.
The gas generally collects at the top of the roadway 100, and the first extraction pipe 5 is positioned at the top of the first wall body 1, so that extraction and sampling are facilitated.
The second extraction pipe 6 is positioned at the middle lower part of the second wall body 2, and extracts and samples the colloidal fluid 4 from the middle lower part.
The underground fireproof and explosion-proof closed isolation system is also extremely easy to maintain, and when the moisture of the colloidal fluid 4 is lost, only water or slurry is added through the injection and discharge pipe 9.
The underground fireproof and explosion-proof closed isolation system provided by the invention is convenient to construct, easy to operate and better in durability than a pure water seal.
In one embodiment, the colloidal fluid 4 is a mixture of super absorbent resin and water. The super absorbent resin is a high polymer with a certain degree of crosslinking, and can quickly absorb water which is hundreds of times heavier than the self weight to form gel. The super absorbent resin is prepared in the following way:
adding a 50% maleic acid solution into the prepared 20% sodium hydroxide solution until the pH value reaches about 7 to prepare a sodium hydroxide neutralizing agent, and then cooling the sodium hydroxide neutralizing agent at room temperature of about 25 ℃.
Acrylamide monomer, calcium bentonite, palygorskite and borate are added into a sodium hydroxide neutralizing agent according to the mass ratio of 69:11:9:0.03, and then the mixture is fully stirred and mixed to form a high water absorption material mixture.
The mixture of superabsorbent material was dispersed using an ultrasonic disperser.
And mixing the dispersed high water absorption material mixture with 0.65% persulfate at a constant temperature of 70 ℃, and forming polymer precipitate to obtain the high water absorption resin.
Drying and crushing the super absorbent resin for later use.
When in use, the mass ratio of water to the super absorbent resin is 112: 3-5.
In one embodiment, the super absorbent resin powder enters the filling zone 3 through the filling pipe 7, and the water enters the filling zone 3 through the water injection and discharge pipe 9.
In one embodiment, the colloidal fluid 4 is a non-Newtonian fluid that increases in viscosity upon impact. non-Newtonian fluids, are fluids that do not satisfy the experimental laws of Newtonian viscosity, i.e., fluids whose shear stress and shear strain rate are not linear. Non-newtonian fluids change viscosity when subjected to a certain force, such as a blow or impact, either decreasing in viscosity to become more fluid or increasing in viscosity to become stiffer. Concentrated solutions and suspensions of high molecular weight polymers, etc., are generally non-newtonian fluids.
In this embodiment, the colloidal fluid 4 is a non-newtonian fluid whose viscosity increases and hardness becomes hard when it is impacted. If gas explosion occurs in the goaf or the roadway 100, the explosion impact force acts on the first wall body 1, the impact force is transmitted to the colloidal fluid 4, the viscosity of the colloidal fluid 4 is increased when the colloidal fluid is impacted, the hardness of the colloidal fluid is hardened, the structural strength of the filled wall body is increased, and the impact resistance is improved.
In one embodiment, the filling area 3 is filled with the colloidal fluid 4, so that the space between the first wall 1 and the second wall 2 is completely filled with the colloidal fluid 4, thereby forming a filling wall with an integral structure.
In one embodiment, grooves are formed in positions, corresponding to the first wall 1 and the second wall 2, on the bottom plate 101, the top plate 102 and the roadway side of the roadway 100, respectively, and peripheral edges of the first wall 1 and the second wall 2 are embedded in the grooves, so that stability of the first wall 1 and the second wall 2 constructed in the roadway 100 is improved.
In one embodiment, the first wall 1 and the second wall 2 are respectively constructed by bricks, and waterproof paint layers are respectively coated on the surfaces of the first wall 1 and the second wall 2.
The bricks are adopted for building the wall, so that the first wall body 1 and the second wall body 2 can be constructed conveniently in the roadway 100. After the construction of the first wall body 1 and the second wall body 2 is completed, waterproof paint layers are respectively coated on the surfaces of the first wall body 1 and the second wall body 2, and the waterproof paint layers seal the surfaces of the first wall body 1 and the second wall body 2, thereby being helpful for preventing gas from seeping out of the wall bodies and preventing water from seeping out of the surfaces of the first wall body 1 and the second wall body 2 during water injection. The waterproof coating can be a waterproof coating for buildings, such as an acrylic waterproof coating.
In one embodiment, the arrangement of the staggered joints of the two bricks adjacent to each other up and down can improve the self structural strength of the first wall body 1 and the second wall body 2. The two bricks in the horizontal direction are connected in a flush joint manner to maintain the structure to be smooth.
In one embodiment, the fill tube 7 and the infusion-discharge tube 9 are plastic tubes, respectively. The filling pipe 7 and the injection-exhaust pipe 9 are made of heat-resistant polyethylene pipes and are light in weight. The outside diameter of the filling tube 7 and the injection-exhaust tube 9 was 50mm, and the wall thickness was 3.5 mm.
The first extraction pipe 5, the second extraction pipe 6 and the water injection pipe 8 are steel pipes respectively, and anti-corrosion layers are coated on the steel pipes. The water injection pipe 8 is long in length, adopts a steel pipe, is high in structural strength and can resist pressure. The water injection pipe 8 has an outer diameter of 50mm and a wall thickness of 5 mm. The first extraction pipe 5 and the second extraction pipe 6 are both made of steel pipes, the outer diameter of the first extraction pipe 5 and the outer diameter of the second extraction pipe 6 are 20mm, and the wall thickness of the first extraction pipe 5 and the wall thickness of the second extraction pipe 6 are 2.5 mm.
The first extraction pipe 5, the second extraction pipe 6 and the water injection pipe 8 are subjected to 360-degree full-coverage hot dip galvanizing to form an anticorrosive coating. The steel pipe coating is uniform, compact and thick, and the zinc and the steel form a zinc-iron alloy layer.
An embodiment of the invention provides a method for constructing an underground fireproof and explosion-proof closed isolation system, which comprises the following steps:
s001: a first wall body 1 and a second wall body 2 are constructed at preset positions of a roadway 100, and a first extraction pipe 5, a second extraction pipe 6, a water injection pipe 8, a filling pipe 7 and a water injection and discharge pipe 9 are installed when the first wall body 1 and the second wall body 2 are constructed.
S002: water is injected into the filling area 3 between the first wall body 1 and the second wall body 2 through the filling pipe 9, and simultaneously, colloid is filled into the filling area 3 between the first wall body 1 and the second wall body 2 through the filling pipe 7 to form a material.
S003: when the filling area is full, the operation is stopped, and the valve 10 on the filling pipe 7 and the filling pipe 9 are closed.
In summary, according to the underground fireproof and explosion-proof airtight isolation system and the construction method thereof provided by the invention, the filling area between the first wall body and the second wall body is filled with the colloidal fluid, and the first wall body, the colloidal fluid and the second wall body form the filling wall body. The colloidal fluid has strong plugging capability, can plug the gaps of the first wall body and the second wall body or the cracks generated in the use process, improves the sealing property of the filled wall body, and can bear stronger impact in the moment of explosion by combining with the first wall body and the second wall body to form an organic whole. When gas explosion happens underground, the colloidal fluid can bear shock waves so as to protect the first wall body and the second wall body and reduce the damage to the wall bodies. The colloidal fluid can also play a role in extinguishing fire, has the functions of stopping the spread of gas explosion fire smoke, preventing the expansion of gas explosion accidents and improving the overall disaster prevention and resistance of the mine.
In addition, the underground fireproof and explosion-proof closed isolation system is extremely easy to maintain, and only water or slurry needs to be added for supplement after the moisture of the colloidal fluid is lost.
The underground fireproof and explosion-proof closed isolation system and the construction method thereof provided by the invention have the advantages of convenience in construction, easiness in operation and better durability than that of a pure water seal.
According to the needs, the above technical schemes can be combined to achieve the best technical effect.
The foregoing is considered as illustrative only of the principles and preferred embodiments of the invention. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.
Claims (10)
1. A fire-proof explosion-proof closed isolation system in a well is characterized by comprising a roadway, a first wall, a second wall, a first extraction pipe, a second extraction pipe, a water injection pipe, a filling pipe and a water injection and drainage pipe;
the first wall body and the second wall body are arranged in a roadway at intervals, and the first wall body is close to a gob;
a closed filling area is arranged between the first wall body and the second wall body at intervals, and colloidal fluid is filled in the filling area;
the first extraction pipe and the water injection pipe sequentially penetrate through the second wall, the filling area and the first wall from outside to inside respectively and are inserted into one side, close to the goaf, of the first wall;
the second extraction pipe, the filling pipe and the injection and discharge pipe respectively penetrate through the second wall from outside to inside and are inserted into the filling area;
the first extraction pipe, the filling pipe, the second extraction pipe, the water injection pipe and the water injection and drainage pipe are sequentially arranged from top to bottom in the vertical direction;
valves are respectively arranged on the first extraction pipe, the filling pipe, the second extraction pipe, the water injection pipe and the water injection and drainage pipe.
2. A downhole fire and explosion proof containment isolation system according to claim 1,
the colloidal fluid is formed by mixing super absorbent resin and water.
3. A downhole fire and explosion proof containment isolation system according to claim 2,
the super absorbent resin powder enters the filling area through the filling pipe, and water enters the filling area through the injection and drainage pipe.
4. A downhole fire and explosion proof containment isolation system according to claim 2,
the colloidal fluid is a non-newtonian fluid that increases in viscosity upon impact.
5. A downhole fire and explosion proof containment isolation system according to any one of claims 1-4,
the colloidal fluid fills the filling area.
6. A downhole fire and explosion proof containment isolation system according to any one of claims 1-4,
grooves are respectively formed in the positions, corresponding to the first wall body and the second wall body, of the bottom plate, the top plate and the roadway side of the roadway;
the peripheral edges of the first wall body and the second wall body are embedded in the grooves.
7. A downhole fire and explosion proof containment isolation system according to any one of claims 1-4,
the first wall body and the second wall body are respectively constructed by bricks, and waterproof coating layers are respectively coated on the surfaces of the first wall body and the second wall body.
8. A downhole fire and explosion proof containment isolation system according to claim 7,
and the two bricks which are adjacent up and down are arranged in a staggered manner.
9. A downhole fire and explosion proof containment isolation system according to any one of claims 1-4,
the filling pipe and the injection and discharge pipe are respectively plastic pipes;
the first extraction pipe, the second extraction pipe and the water injection pipe are respectively steel pipes, and anti-corrosion layers are coated on the steel pipes.
10. A method of constructing a fire and explosion protection downhole containment and isolation system as claimed in any one of claims 1 to 9, comprising the steps of:
s001: constructing a first wall body and a second wall body at a preset position of a roadway, and installing a first extraction pipe, a second extraction pipe, a water injection pipe, a filling pipe and a water injection and drainage pipe when constructing the first wall body and the second wall body;
s002: injecting water into a filling area between the first wall body and the second wall body through the filling and discharging pipes, and simultaneously filling colloid into the filling area between the first wall body and the second wall body through the filling pipes to form a material;
s003: and stopping operation when the filling area is filled, and closing the valves on the filling pipe and the discharging pipe.
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