CN108086945B - Layer-penetrating drilling separation type whole-course gas extraction hole sealing device and hole sealing method thereof - Google Patents
Layer-penetrating drilling separation type whole-course gas extraction hole sealing device and hole sealing method thereof Download PDFInfo
- Publication number
- CN108086945B CN108086945B CN201810056272.1A CN201810056272A CN108086945B CN 108086945 B CN108086945 B CN 108086945B CN 201810056272 A CN201810056272 A CN 201810056272A CN 108086945 B CN108086945 B CN 108086945B
- Authority
- CN
- China
- Prior art keywords
- hole sealing
- pipe
- drilling
- hole
- sealing pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 331
- 238000005553 drilling Methods 0.000 title claims abstract description 175
- 238000000605 extraction Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000000926 separation method Methods 0.000 title claims abstract description 28
- 239000003245 coal Substances 0.000 claims abstract description 62
- 239000002002 slurry Substances 0.000 claims abstract description 47
- 229920002635 polyurethane Polymers 0.000 claims description 39
- 239000004814 polyurethane Substances 0.000 claims description 39
- 229920000742 Cotton Polymers 0.000 claims description 36
- 239000004744 fabric Substances 0.000 claims description 36
- 239000002184 metal Substances 0.000 claims description 27
- 239000004568 cement Substances 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 21
- 239000002390 adhesive tape Substances 0.000 claims description 14
- 239000003250 coal slurry Substances 0.000 claims description 14
- 238000005086 pumping Methods 0.000 claims description 9
- 238000011161 development Methods 0.000 claims description 8
- 210000001503 joint Anatomy 0.000 claims description 8
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 230000014759 maintenance of location Effects 0.000 claims description 4
- 238000007711 solidification Methods 0.000 claims description 2
- 230000008023 solidification Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 abstract description 7
- 239000011435 rock Substances 0.000 abstract description 3
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 239000004047 hole gas Substances 0.000 abstract 2
- 230000008569 process Effects 0.000 description 15
- 239000000463 material Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000013064 chemical raw material Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
- 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
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)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a layer-penetrating drilling separation type whole-course gas extraction hole sealing device and a hole sealing method thereof, wherein the device comprises the following components: drilling holes in the coal bed, wherein the top ends of the drilling holes are arranged at two positions 1 The coal seam forming drilling gas chamber is internally provided with an upper hole sealing pipe, the lower end of the drilling hole is provided with a lower hole sealing pipe, the pipe wall of the upper hole sealing pipe is sleeved with a hole sealing pipe fixing device, the upper hole sealing pipe is conveyed into the upper part of the drilling hole gas chamber through a pushing rod, an upper bag and a lower bag are arranged in a cavity formed by the outer pipe wall of the lower hole sealing pipe and the inner pipe wall of the drilling hole gas chamber, an intermediate cavity formed by the upper bag and the lower bag is filled with expansion slurry, a grouting pipe is arranged on the lower hole sealing pipe, the expansion slurry is injected through the grouting pipe, the hole sealing method adopts the mode that the upper hole sealing pipe is arranged from the position of the drilling hole chamber to a coal penetrating section, the lower hole sealing pipe adopts two-blocking-one-injection hole sealing with pressure, and the middle is pumped by utilizing a drilled rock section, so that the gas tightness is good, gas leakage is not easy, and hole sealing cost is reduced at the same time, and drilling cost is saved.
Description
Technical Field
The invention particularly relates to a layer-penetrating drilling separation type whole-course gas extraction hole sealing device and a hole sealing method thereof.
Background
Mine gas is one of the main factors seriously threatening the safe production of coal mines. Gas explosion and gas outburst are the most disasters of coal mines today, and cause many casualties and huge property losses each year. Therefore, the prevention of the gas disasters is of great significance for reducing coal mine accidents and keeping the healthy and sustainable development of coal industry.
Drilling a coal seam or a gas gathering area, connecting the drilling holes on a special pipeline, and pumping the gas in the coal seam and the goaf to the ground by using a pumping device for utilization; the gas extraction can reduce the gas emission amount in the coal mine exploitation process, prevent the gas from overrun, and prevent the gas explosion and the coal and gas outburst accidents. In addition, the gas is a high-quality environment-friendly energy source, the extracted gas can be used as fuel for civil use and power generation, and is also an important chemical raw material, so that the gas is changed into useful materials, waste is changed into valuable materials, the gas is developed and utilized as a coal associated resource, huge value can be created, and the utilization rate of the resource is improved. Therefore, the gas extraction has important significance.
However, the traditional hole sealing pipe gas extraction hole sealing device in the whole process is adopted, the problems of low drainage concentration, quick flow attenuation and the like occur in the process of executing the outburst prevention measures of the coal seam strip gas area in advance by combining the hydraulic punching anti-reflection technology with the layer-penetrating drilling of the bottom plate rock roadway, and after the hole sealing of the hole sealing pipe in the whole process is executed, the hole sealing pipe in the whole process has the problems of long butt joint time of the hole sealing pipe, easiness in falling off in the drilling, multiple consumed materials, high cost and the like.
Therefore, the production device has the advantages of simple structure, reasonable design, good air tightness, no air leakage in hole sealing, stable drainage, less material consumption, low cost, capability of improving the gas drainage purity and reducing the leakage of gas, and wide market prospect, and the whole-course gas drainage hole sealing device with separated penetrating holes and the hole sealing method thereof.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the full-process gas extraction hole sealing device and the hole sealing method thereof, which have the advantages of simple structure, reasonable design, good air tightness, no hole sealing leakage, stable drainage, less consumption and low cost, and can improve the gas extraction purity and reduce the leakage of gas.
The technical scheme of the invention is realized as follows:
a through-layer drilling separation type whole-course gas extraction hole sealing device comprises: drilling holes in the coal bed, wherein the top ends of the drilling holes are arranged at two positions 1 Drilling air chamber of formation of coal seam, its characterized in that: the inner cavity of the drilling air chamber is provided with an upper hole sealing pipe, the lower end of the drilling is provided with a lower hole sealing pipe, the upper hole sealing pipe is provided with a hole, the lower hole sealing pipe is pore-free, the top of the upper hole sealing pipe is provided with a conical plug, the pipe wall of the upper hole sealing pipe is sleeved with a hole sealing pipe fixing device, the upper hole sealing pipe is used for conveying the upper hole sealing pipe into the upper part of the drilling air chamber through a pushing rod pushing the conical plug, an upper bag and a lower bag are arranged in a cavity formed by the outer pipe wall of the lower hole sealing pipe and the inner pipe wall of the drilling air chamber, expansion slurry is filled in the upper bag and the lower bag, the middle cavity formed by the upper bag and the lower bag is filled with the expansion slurry, a grouting pipe is arranged on the lower hole sealing pipe, and a valve is arranged on the grouting pipe and is filled with the expansion slurry through the grouting pipe.
The hole sealing pipe fixing device is a cotton cloth bag, a zipper is arranged on the cotton cloth bag, and polyurethane is injected through the zipper.
The cotton cloth bag is sleeved on the pipe wall of the upper hole sealing pipe, and the diameter of the cotton cloth bag is determined according to the diameter of the upper hole sealing pipe.
The push rod is a metal push rod made of hollow alloy steel pipes.
The push rod is formed by splicing a plurality of small push rods with the phi of 10mm and the d of 1m, quick connectors are installed at two ends of the small push rods, one ends of the small push rods are female connectors, and the other ends of the small push rods are male connectors to realize quick butt joint.
The expansion slurry is expansion cement.
A hole sealing method for a layer-penetrating drilling separation type whole-course gas extraction is characterized by comprising the following steps of:
the method comprises the following steps:
step 1: drilling holes at positions 1-2 m below the coal seeing point without crack development, so that the diameter of the drilled holes reaches 94mm, the drilled holes penetrate through the coal seam to enter the coal seam for 1-2 m to stop drilling, and the gas is light and is gathered in a space 1-2 m at the top of the drilled holes to form a drilling gas chamber;
step 2: after drilling holes and checking acceptance, preparing an upper hole sealing pipe with the diameter of 50mm corresponding to the length of the coal section of the drilling gas chamber, and determining the position of the upper hole sealing pipe sleeved by the hole sealing pipe fixing device according to the position height of the hole wall without coal slurry retention in the formed drilling gas chamber, wherein the hole wall without coal slurry retention is suitable for expansion and solidification of polyurethane filled in the hole sealing pipe fixing device;
step 3: according to the position where the hole sealing pipe fixing device is sleeved, which is determined in the step 2, the hole sealing pipe fixing device of the cotton cloth bag with the diameter of 65-70 mm is sleeved on the upper hole sealing pipe, and a plurality of circles of paper adhesive tapes are wound at the hole sealing pipe at the fixed position to prevent the paper adhesive tapes from slipping down; opening the zipper of the hole sealing pipe fixing device, taking 20-30 g of polyurethane to rub the polyurethane under 3-5 hands for mixing, pouring the polyurethane into the hole sealing pipe fixing device through a zipper opening, and closing the zipper;
step 4: according to the length of the drilling hole, installing a plurality of sections of small pushing rods through a quick connector to enable the total length of the pushing rods to be larger than the length of a drilling hole air chamber, using the spliced metal pushing rods to prop against a conical plug of an upper sealing hole pipe, sending the upper sealing hole pipe provided with the sealing hole pipe fixing device in the step 3 into the drilling hole air chamber at the top end of the drilling hole, after 5-15 min, after the polyurethane injected in the step 3 expands, the diameter reaches 120-150 mm, and after the polyurethane can be compressed by 2-3 MPa, withdrawing the metal pushing rods;
step 5: an upper bag is fixed at a position 9m away from a drilling pipe orifice, a lower hole sealing pipe is inserted in the middle of the bag, and a lower bag is fixed at a position 1m away from the drilling pipe orifice, so that a closed cavity is formed by the two bags, the inner wall of a drilling air chamber and the outer wall of the lower hole sealing pipe, and a grouting pipe is connected to the lower bag;
step 6: pouring the expansion cement into a stirring barrel, stirring the expansion cement and water in a ratio of 1:0.8 to form paste, immersing a slurry suction port of a portable grouting pump in the stirring barrel, connecting a slurry outlet of the grouting pump with a grouting pipe, grouting into a cavity in the step 5, and stopping grouting when the pumping pressure of the grouting pump reaches 1.5MPa and does not rise any more;
step 8: and after the grouting outlet of the grouting pump is pulled out from the grouting pipe, closing the valve on the grouting pipe, and closing the pipe.
The invention has the following positive effects: the invention relates to a layer-penetrating drilling separation type whole-course gas extraction hole sealing device, two ends of a drilling hole are respectively provided with a hole sealing pipe, a hole sealing pipe is arranged from the position of a drilling hole air chamber formed at the top end of the drilling hole to the position of a coal penetrating section, which is not holes of the hole sealing pipe, a hole sealing pipe fixing device is arranged on the position below a coal penetrating point, the hole sealing pipe is sent into a coal seam roof by using a self-made metal push rod, after polyurethane filled in the hole sealing pipe fixing device is expanded and solidified, the metal push rod is retracted, an upper bag and a lower bag are arranged on a lower hole sealing pipe at the lower end of the drilling hole, expansion slurry is filled in the upper bag and the lower bag, an intermediate cavity formed by the upper bag and the lower bag is filled with the expansion slurry, a grouting pipe is arranged on the lower hole sealing pipe, a valve is arranged on the grouting pipe, the hole sealing pipe is filled with the expansion slurry through the grouting pipe, the hole sealing pipe is sealed by adopting two-sealing one injection holes under pressure, and the middle is pumped by using a rock section of the drilling hole, so that the characteristics of good hole sealing tightness and difficult air leakage are achieved, and the hole sealing cost is reduced at the same time, thus saving the drilling construction cost.
In addition, the invention has the following advantages:
(1) the extraction amount statistics is carried out, the separation type hole sealing and the whole-course hole sealing pipe hole sealing extraction effect is better, and the extraction purity is higher;
(2) the hole sealing cost is 39.1 percent lower than the average hole sealing cost of each group of holes of the hole sealing pipe in the whole process;
(3) the device and the method for hole sealing by full gas extraction through layer drilling separation have the characteristics of good hole sealing tightness and difficult gas leakage, and the initial extraction concentration accords with the rule that the pre-extraction gas concentration is not lower than 30% in fifty th rule of the outburst rule of preventing and curing coal and gas "
(4) The separation type hole sealing process can be popularized and applied under similar gas geological conditions.
To sum up: the gas extraction device has the advantages of simple structure, reasonable design, simple operation, good air tightness, no air leakage in hole sealing, stable drainage, less consumption and low cost, and can improve the gas extraction purity and reduce the leakage of gas.
Drawings
Fig. 1 is a schematic diagram of a main structure of the present invention.
FIG. 2 is a schematic view of another main structure of the present invention.
Fig. 3 is a schematic structural view of the fixing device for the hole sealing tube in the invention.
Fig. 4 is a schematic structural diagram of the pushing upper seal tube by the metal pushing rod in the invention.
FIG. 5 is a graph comparing the flow rate of the extraction mixture of the present invention with that of the conventional full-closed group.
FIG. 6 is a graph comparing the extraction purity of the present invention with that of the conventional full-closed group.
In the figure: 1 drilling, 1-1 drilling air chamber, 3 coal seam roof, 4 two 1 The hydraulic punching device comprises a coal bed, a coal bed bottom plate 5, a hydraulic punching influence range 6, an upper sealing hole pipe 2, a conical plug 2-1, a sealing hole pipe fixing device 7, a cotton cloth bag 7-1, a zipper 7-2, a lower sealing hole pipe 9, a grouting pipe 11, expansion cement 10, an upper bag 12, a lower bag 13, a pushing rod 14 and a quick connector 14-1.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1 to 6, a layer-penetrating drilling separation type whole-course gas extraction hole sealing device comprises: a drill hole 1 drilled in the coal seam, the top end of the drill hole 1 is arranged at two positions 1 The coal seam forming drilling gas chamber 1-1, the cavity of the drilling gas chamber 1-1 is provided with an upper hole sealing pipe 2, the lower end of the drilling gas chamber 1 is provided with a lower hole sealing pipe 9, the upper hole sealing pipe 2 is provided with a hole, the lower hole sealing pipe 9 is pore-free, the top of the upper hole sealing pipe 2 is provided with a conical plug 2-1, the pipe wall of the upper hole sealing pipe 2 is sleeved with a hole sealing pipe fixing device 7, the upper hole sealing pipe 2 sends the upper hole sealing pipe 2 into the upper part of the drilling gas chamber 1-1 by pushing a rod 14 against the conical plug 2-1, an upper bag 12 and a lower bag 13 are arranged in a cavity formed by the outer pipe wall of the lower hole sealing pipe 9 and the inner pipe wall of the drilling gas chamber 1-1, and the upper bag is provided with a lower bag 13The bag 12 and the lower bag 13 are filled with expansion slurry, the middle cavity formed by the upper bag 12 and the lower bag 13 is filled with expansion slurry, the lower sealing hole pipe 9 penetrates through the lower bag 13 and is provided with a grouting pipe 11, a valve is arranged on the grouting pipe 11, and the expansion slurry is injected through the grouting pipe 11. The hole sealing pipe fixing device 7 is a cotton cloth bag 7-1, a zipper 7-2 is arranged on the cotton cloth bag 7-1, polyurethane is injected through the zipper 7-2, the cotton cloth bag 7-1 is sleeved on the pipe wall of the upper hole sealing pipe 2, the diameter of the cotton cloth bag 7-1 is determined according to the diameter of the upper hole sealing pipe 2, the push rod 14 is a metal push rod made of hollow alloy steel pipes, the push rod 14 is formed by splicing a plurality of small push rods with 10mm sections phi and 1m d, quick connectors are arranged at two ends of the small push rod, one end of the small push rod is a female connector, the other end of the small push rod is a male connector, quick butt joint is realized, and the expansion slurry is expansion cement.
A hole sealing method for full-process gas extraction through layer-penetrating drilling separation comprises the following steps:
step 1: drilling holes 1 at positions 1m below the coal seeing point and without crack development, so that the diameter of the drilling holes 1 reaches 94mm, the drilling holes penetrate through a coal seam to enter the coal seam 1m for stopping drilling, and gas is light and is gathered in a space 1m at the top of the drilling holes 1 to form drilling gas chambers 1-1;
step 2: after drilling the hole 1 and checking and accepting, preparing an upper hole sealing pipe 2 corresponding to the length of the coal section of the drilling gas chamber 1-1, wherein the diameter of the upper hole sealing pipe 2 is 50mm, determining the position of the upper hole sealing pipe 2 sleeved by the hole sealing pipe fixing device 7 according to the position height of the hole wall where no coal slurry stays in the drilling gas chamber 1-1 and the formed drilling gas chamber 1-1, and expanding and solidifying polyurethane filled in the hole sealing pipe fixing device 7 is suitable for the position of the hole sealing pipe at the hole wall where no coal slurry stays;
step 3: according to the position where the hole sealing pipe fixing device 7 is sleeved in the step 2, the hole sealing pipe fixing device 7 with the diameter of 65mm of the cotton cloth bag 7-1 is sleeved on the upper hole sealing pipe 2, and a plurality of circles of paper adhesive tapes are wound at the position of the upper hole sealing pipe 2 at the fixed position to prevent the paper adhesive tapes from slipping down; opening the zipper 7-2 of the hole opening pipe fixing device 7, taking 20g of polyurethane to mix under the hand rubbing 4, pouring the polyurethane into the hole sealing pipe fixing device 7 through the opening of the zipper 7-2, and closing the zipper 7-2;
step 4: according to the length of the drill hole 1, installing a plurality of sections of small pushing rods through the quick connector 14-1 to enable the total length of the pushing rods 14-1 to be larger than the length of the drill hole 1, using the spliced metal pushing rods 14-1 to prop against the conical plugs 2-1 of the upper sealing pipes 2, sending the upper sealing pipes 2 provided with the sealing pipe fixing devices 7 in the step 3 into the drill hole air chambers 1-1 of the drill hole 1, after 5min, after the injected polyurethane in the step 3 expands, the diameter reaches 120mm, and after the metal pushing rods 14 can be pressed by 2 MPa;
step 5: an upper bag 12 is fixed at a position 9m away from the pipe orifice of the drilling hole 1, a lower hole sealing pipe 9 is inserted in the middle of the upper bag 12, a lower bag 13 is further fixed at a position 1m away from the pipe orifice of the drilling hole 1, the lower hole sealing pipe 9 penetrates through the lower bag 13, so that a closed cavity is formed by the two bags, the inner wall of the drilling hole 1 and the outer wall of the lower hole sealing pipe 9, a grouting pipe 11 is connected to the lower bag 13, and the grouting pipe 11 is inserted into the cavity;
step 6: pouring the expansion cement into a stirring barrel, stirring the expansion cement and water in a ratio of 1:0.8 to form paste, immersing a slurry suction port of a portable grouting pump in the stirring barrel, connecting a slurry outlet of the grouting pump with a grouting pipe 11, grouting into a cavity in the step 5, and stopping grouting when the pumping pressure of the grouting pump reaches 1.5MPa and does not rise any more;
step 8: after the grouting outlet of the grouting pump is pulled out from the grouting pipe 11, the valve on the grouting pipe 11 is closed, and the pipe sealing is finished.
Example 2
As shown in fig. 1 to 6, a layer-penetrating drilling separation type whole-course gas extraction hole sealing device comprises: a drill hole 1 drilled in the coal seam, the top end of the drill hole 1 is arranged at two positions 1 The coal seam forming drilling gas chamber 1-1, an upper hole sealing pipe 2 is arranged in the inner cavity of the drilling gas chamber 1-1, a lower hole sealing pipe 9 is arranged at the lower end of the drilling gas chamber 1, a hole is formed in the upper hole sealing pipe 2, no hole is formed in the lower hole sealing pipe 9, a conical plug 2-1 is arranged at the top of the upper hole sealing pipe 2, a hole sealing pipe fixing device 7 is sleeved on the pipe wall of the upper hole sealing pipe 2, the upper hole sealing pipe 2 pushes the conical plug 2-1 through a pushing rod 14 to convey the upper hole sealing pipe 2 into the upper part of the drilling gas chamber 1-1, and a cavity formed by the outer pipe wall of the lower hole sealing pipe 9 and the inner pipe wall of the drilling gas chamber 1-1 is formed by the outer pipe wall of the lower hole sealing pipe 9The upper bag 12 and the lower bag 13 are arranged, the upper bag 12 and the lower bag 13 are filled with expansion slurry, an intermediate cavity formed by the upper bag 12 and the lower bag 13 is filled with expansion slurry, a grouting pipe 11 is arranged on the lower sealing hole pipe 9 penetrating through the lower bag 13, a valve is arranged on the grouting pipe 11, and the expansion slurry is injected through the grouting pipe 11. The hole sealing pipe fixing device 7 is a cotton cloth bag 7-1, a zipper 7-2 is arranged on the cotton cloth bag 7-1, polyurethane is injected through the zipper 7-2, the cotton cloth bag 7-1 is sleeved on the pipe wall of the upper hole sealing pipe 2, the diameter of the cotton cloth bag 7-1 is determined according to the diameter of the upper hole sealing pipe 2, the push rod 14 is a metal push rod made of hollow alloy steel pipes, the push rod 14 is formed by splicing a plurality of small push rods with 10mm sections phi and 1m d, quick connectors are arranged at two ends of the small push rod, one end of the small push rod is a female connector, the other end of the small push rod is a male connector, quick butt joint is realized, and the expansion slurry is expansion cement.
A hole sealing method for full-process gas extraction through layer-penetrating drilling separation comprises the following steps:
step 1: drilling holes 1 at positions 1.2m below the coal seeing point and having no crack development, so that the diameter of the drilling holes 1 reaches 94mm, the drilling holes penetrate through a coal seam to enter the coal seam for 1.2m to stop drilling, and the gas is light and is gathered in a space of 1.2m at the top of the drilling holes 1 to form drilling gas chambers 1-1;
step 2: after drilling the hole 1 and checking and accepting, preparing an upper hole sealing pipe 2 corresponding to the length of the coal section of the drilling gas chamber 1-1, wherein the diameter of the upper hole sealing pipe 2 is 50mm, determining the position of the upper hole sealing pipe 2 sleeved by the hole sealing pipe fixing device 7 according to the position height of the hole wall where no coal slurry stays in the drilling gas chamber 1-1 and the formed drilling gas chamber 1-1, and expanding and solidifying polyurethane filled in the hole sealing pipe fixing device 7 is suitable for the position of the hole sealing pipe at the hole wall where no coal slurry stays;
step 3: according to the position where the hole sealing pipe fixing device 7 is sleeved in the step 2, the hole sealing pipe fixing device 7 with the diameter of 67mm of the cotton cloth bag 7-1 is sleeved on the upper hole sealing pipe 2, and a plurality of circles of paper adhesive tapes are wound at the position of the upper hole sealing pipe 2 at the fixed position to prevent the paper adhesive tapes from slipping down; opening the zipper 7-2 of the hole opening pipe fixing device 7, taking 22g of polyurethane to mix under the hand rubbing 3, pouring the polyurethane into the hole sealing pipe fixing device 7 through the opening of the zipper 7-2, and closing the zipper 7-2;
step 4: according to the length of the drill hole 1, installing a plurality of sections of small pushing rods through the quick connector 14-1 to enable the total length of the pushing rods 14-1 to be larger than the length of the drill hole 1, using the spliced metal pushing rods 14-1 to prop against the conical plugs 2-1 of the upper sealing pipes 2, sending the upper sealing pipes 2 provided with the sealing pipe fixing devices 7 in the step 3 into the drill hole air chambers 1-1 of the drill hole 1, after 5min, after the injected polyurethane in the step 3 expands, the diameter reaches 140mm, and after the metal pushing rods 14 can be pressed by 2.2MPa, withdrawing the metal pushing rods 14;
step 5: an upper bag 12 is fixed at a position 9m away from the pipe orifice of the drilling hole 1, a lower hole sealing pipe 9 is inserted in the middle of the upper bag 12, a lower bag 13 is further fixed at a position 1m away from the pipe orifice of the drilling hole 1, the lower hole sealing pipe 9 penetrates through the lower bag 13, so that a closed cavity is formed by the two bags, the inner wall of the drilling hole 1 and the outer wall of the lower hole sealing pipe 9, a grouting pipe 11 is connected to the lower bag 13, and the grouting pipe 11 is inserted into the cavity;
step 6: pouring the expansion cement into a stirring barrel, stirring the expansion cement and water in a ratio of 1:0.8 to form paste, immersing a slurry suction port of a portable grouting pump in the stirring barrel, connecting a slurry outlet of the grouting pump with a grouting pipe 11, grouting into a cavity in the step 5, and stopping grouting when the pumping pressure of the grouting pump reaches 1.5MPa and does not rise any more;
step 8: after the grouting outlet of the grouting pump is pulled out from the grouting pipe 11, the valve on the grouting pipe 11 is closed, and the pipe sealing is finished.
Example 3
As shown in fig. 1 to 6, a layer-penetrating drilling separation type whole-course gas extraction hole sealing device comprises: a drill hole 1 drilled in the coal seam, the top end of the drill hole 1 is arranged at two positions 1 The coal seam forming drilling gas chamber 1-1, the drilling gas chamber 1-1 inner cavity in be provided with the hole sealing pipe 2, drilling 1 lower extreme is provided with hole sealing pipe 9 down, last hole sealing 2 on offer the hole, hole sealing pipe 9 is last to be pore-free, the top of going up hole sealing pipe 2 is provided with conical end cap 2-1, the cover is equipped with hole sealing pipe fixing device 7 on the pipe wall of going up hole sealing pipe 2, go up hole sealing pipe 2 and push up conical end cap 2-1 and send into the upper portion of drilling gas chamber 1-1 with last hole sealing pipe 2 through push rod 14, hole sealing pipe downThe cavity formed by the outer pipe wall of 9 and the inner pipe wall of the drilling air chamber 1-1 is provided with an upper bag 12 and a lower bag 13, the upper bag 12 and the lower bag 13 are filled with expansion slurry, the middle cavity formed by the upper bag 12 and the lower bag 13 is filled with expansion slurry, the lower hole sealing pipe 9 penetrates through the lower bag 13 and is provided with a grouting pipe 11, a valve is arranged on the grouting pipe 11, and the expansion slurry is injected through the grouting pipe 11. The hole sealing pipe fixing device 7 is a cotton cloth bag 7-1, a zipper 7-2 is arranged on the cotton cloth bag 7-1, polyurethane is injected through the zipper 7-2, the cotton cloth bag 7-1 is sleeved on the pipe wall of the upper hole sealing pipe 2, the diameter of the cotton cloth bag 7-1 is determined according to the diameter of the upper hole sealing pipe 2, the push rod 14 is a metal push rod made of hollow alloy steel pipes, the push rod 14 is formed by splicing a plurality of small push rods with 10mm sections phi and 1m d, quick connectors are arranged at two ends of the small push rod, one end of the small push rod is a female connector, the other end of the small push rod is a male connector, quick butt joint is realized, and the expansion slurry is expansion cement.
A hole sealing method for full-process gas extraction through layer-penetrating drilling separation comprises the following steps:
step 1: drilling holes 1 at positions 1.5m below the coal seeing point and having no crack development, so that the diameter of the drilling holes 1 reaches 94mm, the drilling holes penetrate through a coal seam to enter the coal seam for 1.5m to stop drilling, and the gas is light and is gathered in a space of 1.5m at the top of the drilling holes 1 to form drilling gas chambers 1-1;
step 2: after drilling the hole 1 and checking and accepting, preparing an upper hole sealing pipe 2 corresponding to the length of the coal section of the drilling gas chamber 1-1, wherein the diameter of the upper hole sealing pipe 2 is 50mm, determining the position of the upper hole sealing pipe 2 sleeved by the hole sealing pipe fixing device 7 according to the position height of the hole wall where no coal slurry stays in the drilling gas chamber 1-1 and the formed drilling gas chamber 1-1, and expanding and solidifying polyurethane filled in the hole sealing pipe fixing device 7 is suitable for the position of the hole sealing pipe at the hole wall where no coal slurry stays;
step 3: according to the position where the hole sealing pipe fixing device 7 is sleeved in the step 2, the hole sealing pipe fixing device 7 with the diameter of 66mm of cotton cloth bag 7-1 is sleeved on the upper hole sealing pipe 2, and a plurality of circles of paper adhesive tapes are wound at the position of the upper hole sealing pipe 2 at the fixed position to prevent the paper adhesive tapes from slipping down; opening the zipper 7-2 of the hole sealing tube fixing device 7, taking 25g of polyurethane to mix under the hand rubbing 4, pouring the polyurethane into the hole sealing tube fixing device 7 through a zipper opening, and closing the zipper 7-2;
step 4: according to the length of the drill hole 1, installing a plurality of sections of small pushing rods through the quick connector 14-1 to enable the total length of the pushing rods 14-1 to be larger than the length of the drill hole 1, using the spliced metal pushing rods 14-1 to prop against the conical plugs 2-1 of the upper sealing pipes 2, sending the upper sealing pipes 2 provided with the sealing pipe fixing devices 7 in the step 3 into the drill hole air chambers 1-1 and 8min of the drill hole 1, and withdrawing the metal pushing rods 14 after the diameter of the polyurethane injected in the step 3 reaches 130mm after expansion and the pressure can be 2.5 MPa;
step 5: an upper bag 12 is fixed at a position 9m away from the pipe orifice of the drilling hole 1, a lower hole sealing pipe 9 is inserted in the middle of the upper bag 12, a lower bag 13 is further fixed at a position 1m away from the pipe orifice of the drilling hole 1, the lower hole sealing pipe 9 penetrates through the lower bag 13, so that a closed cavity is formed by the two bags, the inner wall of the drilling hole 1 and the outer wall of the lower hole sealing pipe 9, a grouting pipe 11 is connected to the lower bag 13, and the grouting pipe 11 is inserted into the cavity;
step 6: pouring the expansion cement into a stirring barrel, stirring the expansion cement and water in a ratio of 1:0.8 to form paste, immersing a slurry suction port of a portable grouting pump in the stirring barrel, connecting a slurry outlet of the grouting pump with a grouting pipe 11, grouting into a cavity in the step 5, and stopping grouting when the pumping pressure of the grouting pump reaches 1.5MPa and does not rise any more;
step 8: after the grouting outlet of the grouting pump is pulled out from the grouting pipe 11, the valve on the grouting pipe 11 is closed, and the pipe sealing is finished.
Example 4
As shown in fig. 1 to 6, a layer-penetrating drilling separation type whole-course gas extraction hole sealing device comprises: a drill hole 1 drilled in the coal seam, the top end of the drill hole 1 is arranged at two positions 1 The coal seam forming drilling gas chamber 1-1, the inner cavity of the drilling gas chamber 1-1 is provided with an upper hole sealing pipe 2, the lower end of the drilling gas chamber 1 is provided with a lower hole sealing pipe 9, the upper hole sealing pipe 2 is provided with a hole, the lower hole sealing pipe 9 is pore-free, the top of the upper hole sealing pipe 2 is provided with a conical plug 2-1, the pipe wall of the upper hole sealing pipe 2 is sleeved with a hole sealing pipe fixing device 7, and the upper hole sealing pipe 2 is propped against the conical plug 2-1 through a pushing rod 14 to seal the upper holeThe hole pipe 2 is sent into the upper part of the drilling air chamber 1-1, an upper bag 12 and a lower bag 13 are arranged in a cavity formed by the outer pipe wall of the lower hole sealing pipe 9 and the inner pipe wall of the drilling air chamber 1-1, the upper bag 12 and the lower bag 13 are filled with expansion slurry, the middle cavity formed by the upper bag 12 and the lower bag 13 is filled with expansion slurry, a grouting pipe 11 is arranged on the lower hole sealing pipe 9 penetrating through the lower bag 13, a valve is arranged on the grouting pipe 11, and the expansion slurry is injected through the grouting pipe 11. The hole sealing pipe fixing device 7 is a cotton cloth bag 7-1, a zipper 7-2 is arranged on the cotton cloth bag 7-1, polyurethane is injected through the zipper 7-2, the cotton cloth bag 7-1 is sleeved on the pipe wall of the upper hole sealing pipe 2, the diameter of the cotton cloth bag 7-1 is determined according to the diameter of the upper hole sealing pipe 2, the push rod 14 is a metal push rod made of hollow alloy steel pipes, the push rod 14 is formed by splicing a plurality of small push rods with 10mm sections phi and 1m d, quick connectors are arranged at two ends of the small push rod, one end of the small push rod is a female connector, the other end of the small push rod is a male connector, quick butt joint is realized, and the expansion slurry is expansion cement.
A hole sealing method for full-process gas extraction through layer-penetrating drilling separation comprises the following steps:
step 1: drilling holes 1 at positions 1.8m below the coal seeing point and having no crack development, so that the diameter of the drilling holes 1 reaches 94mm, the drilling holes penetrate through a coal seam to enter the coal seam for 1.8m to stop drilling, and the gas is light and is gathered in a space of 1.8m at the top of the drilling holes 1 to form drilling gas chambers 1-1;
step 2: after drilling the hole 1 and checking and accepting, preparing an upper hole sealing pipe 2 corresponding to the length of the coal section of the drilling gas chamber 1-1, wherein the diameter of the upper hole sealing pipe 2 is 50mm, determining the position of the upper hole sealing pipe 2 sleeved by the hole sealing pipe fixing device 7 according to the position height of the hole wall where no coal slurry stays in the drilling gas chamber 1-1 and the formed drilling gas chamber 1-1, and expanding and solidifying polyurethane filled in the hole sealing pipe fixing device 7 is suitable for the position of the hole sealing pipe at the hole wall where no coal slurry stays;
step 3: according to the position where the hole sealing pipe fixing device 7 is sleeved in the step 2, the hole sealing pipe fixing device 7 with the diameter of 68mm of the cotton cloth bag 7-1 is sleeved on the upper hole sealing pipe 2, and a plurality of circles of paper adhesive tapes are wound at the position of the upper hole sealing pipe 2 at the fixed position to prevent the paper adhesive tapes from slipping down; opening the zipper 7-2 of the hole sealing tube fixing device 7, taking 28g of polyurethane to mix under the hand rubbing 4, pouring the polyurethane into the hole sealing tube fixing device 7 through a zipper opening, and closing the zipper 7-2;
step 4: according to the length of the drill hole 1, installing a plurality of sections of small pushing rods through the quick connector 14-1 to enable the total length of the pushing rods 14-1 to be larger than the length of the drill hole 1, using the spliced metal pushing rods 14-1 to prop against the conical plugs 2-1 of the upper sealing pipes 2, sending the upper sealing pipes 2 provided with the sealing pipe fixing devices 7 in the step 3 into the drill hole air chamber 1-1 of the drill hole 1, after 12min, after the injected polyurethane in the step 3 expands, the diameter reaches 130mm, and after the metal pushing rods 14 can be pressed by 2.8MPa, withdrawing the metal pushing rods 14;
step 5: an upper bag 12 is fixed at a position 9m away from the pipe orifice of the drilling hole 1, a lower hole sealing pipe 9 is inserted in the middle of the upper bag 12, a lower bag 13 is further fixed at a position 1m away from the pipe orifice of the drilling hole 1, the lower hole sealing pipe 9 penetrates through the lower bag 13, so that a closed cavity is formed by the two bags, the inner wall of the drilling hole 1 and the outer wall of the lower hole sealing pipe 9, a grouting pipe 11 is connected to the lower bag 13, and the grouting pipe 11 is inserted into the cavity;
step 6: pouring the expansion cement into a stirring barrel, stirring the expansion cement and water in a ratio of 1:0.8 to form paste, immersing a slurry suction port of a portable grouting pump in the stirring barrel, connecting a slurry outlet of the grouting pump with a grouting pipe 11, grouting into a cavity in the step 5, and stopping grouting when the pumping pressure of the grouting pump reaches 1.5MPa and does not rise any more;
step 8: after the grouting outlet of the grouting pump is pulled out from the grouting pipe 11, the valve on the grouting pipe 11 is closed, and the pipe sealing is finished.
Example 5
As shown in fig. 1 to 6, a layer-penetrating drilling separation type whole-course gas extraction hole sealing device comprises: a drill hole 1 drilled in the coal seam, the top end of the drill hole 1 is arranged at two positions 1 The coal seam forming drilling gas chamber 1-1, the inner cavity of the drilling gas chamber 1-1 is provided with an upper hole sealing pipe 2, the lower end of the drilling gas chamber 1 is provided with a lower hole sealing pipe 9, the upper hole sealing pipe 2 is provided with holes, the lower hole sealing pipe 9 is pore-free, the top of the upper hole sealing pipe 2 is provided with a conical plug 2-1, the pipe wall of the upper hole sealing pipe 2 is sleeved with a hole sealing pipe fixing device 7, and the upper hole sealing pipe is provided with a hole sealing pipe2, the upper sealing hole pipe 2 is conveyed into the upper part of the drilling air chamber 1-1 by the pushing rod 14 against the conical plug 2-1, an upper bag 12 and a lower bag 13 are arranged in a cavity formed by the outer pipe wall of the lower sealing hole pipe 9 and the inner pipe wall of the drilling air chamber 1-1, the upper bag 12 and the lower bag 13 are filled with expansion slurry, the middle cavity formed by the upper bag 12 and the lower bag 13 is filled with expansion slurry, a grouting pipe 11 is arranged on the lower sealing hole pipe 9 penetrating through the lower bag 13, a valve is arranged on the grouting pipe 11, and the expansion slurry is injected through the grouting pipe 11. The hole sealing pipe fixing device 7 is a cotton cloth bag 7-1, a zipper 7-2 is arranged on the cotton cloth bag 7-1, polyurethane is injected through the zipper 7-2, the cotton cloth bag 7-1 is sleeved on the pipe wall of the upper hole sealing pipe 2, the diameter of the cotton cloth bag 7-1 is determined according to the diameter of the upper hole sealing pipe 2, the push rod 14 is a metal push rod made of hollow alloy steel pipes, the push rod 14 is formed by splicing a plurality of small push rods with 10mm sections phi and 1m d, quick connectors are arranged at two ends of the small push rod, one end of the small push rod is a female connector, the other end of the small push rod is a male connector, quick butt joint is realized, and the expansion slurry is expansion cement.
A hole sealing method for full-process gas extraction through layer-penetrating drilling separation comprises the following steps:
step 1: drilling holes 1 at positions 2m below the coal seeing point and without crack development, so that the diameter of the drilling holes 1 reaches 94mm, the drilling holes penetrate through a coal seam to enter the coal seam for 2m to stop drilling, and gas is light and is gathered in a space 2m at the top of the drilling holes 1 to form drilling gas chambers 1-1;
step 2: after drilling the hole 1 and checking and accepting, preparing an upper hole sealing pipe 2 corresponding to the length of the coal section of the drilling gas chamber 1-1, wherein the diameter of the upper hole sealing pipe 2 is 50mm, determining the position of the upper hole sealing pipe 2 sleeved by the hole sealing pipe fixing device 7 according to the position height of the hole wall where no coal slurry stays in the drilling gas chamber 1-1 and the formed drilling gas chamber 1-1, and expanding and solidifying polyurethane filled in the hole sealing pipe fixing device 7 is suitable for the position of the hole sealing pipe at the hole wall where no coal slurry stays;
step 3: according to the position where the hole sealing pipe fixing device 7 is sleeved in the step 2, the hole sealing pipe fixing device 7 with the diameter of 70mm of the cotton cloth bag 7-1 is sleeved on the upper hole sealing pipe 2, and a plurality of circles of paper adhesive tapes are wound at the position of the upper hole sealing pipe 2 at the fixed position to prevent the paper adhesive tapes from slipping down; opening the zipper of the hole sealing pipe fixing device 7, taking 30g of polyurethane to mix under the hand rubbing 5, pouring the polyurethane into the hole sealing pipe fixing device 7 through the opening of the zipper 7-2, and closing the zipper 7-2;
step 4: according to the length of the drill hole 1, installing a plurality of sections of small pushing rods through the quick connector 14-1 to enable the total length of the pushing rods 14-1 to be larger than the length of the drill hole 1, using the spliced metal pushing rods 14-1 to prop against the conical plugs 2-1 of the upper sealing pipes 2, sending the upper sealing pipes 2 provided with the sealing pipe fixing devices 7 in the step 3 into the drill hole air chamber 1-1 of the drill hole 1, after 15min, after the injected polyurethane in the step 3 expands, the diameter reaches 150mm, and after the metal pushing rods 14 can be pressed by 3 MPa;
step 5: an upper bag 12 is fixed at a position 9m away from the pipe orifice of the drilling hole 1, a lower hole sealing pipe 9 is inserted in the middle of the upper bag 12, a lower bag 13 is further fixed at a position 1m away from the pipe orifice of the drilling hole 1, the lower hole sealing pipe 9 penetrates through the lower bag 13, so that a closed cavity is formed by the two bags, the inner wall of the drilling hole 1 and the outer wall of the lower hole sealing pipe 9, a grouting pipe 11 is connected to the lower bag 13, and the grouting pipe 11 is inserted into the cavity;
step 6: pouring the expansion cement into a stirring barrel, stirring the expansion cement and water in a ratio of 1:0.8 to form paste, immersing a slurry suction port of a portable grouting pump in the stirring barrel, connecting a slurry outlet of the grouting pump with a grouting pipe 11, grouting into a cavity in the step 5, and stopping grouting when the pumping pressure of the grouting pump reaches 1.5MPa and does not rise any more;
step 8: after the grouting outlet of the grouting pump is pulled out from the grouting pipe 11, the valve on the grouting pipe 11 is closed, and the pipe sealing is finished.
1. Hole sealing consumption of the traditional process and the process of the invention are compared
TABLE 1 statistics of hole sealing conditions of the hole sealing pipe in the whole course of the separated hole sealing and conventional process
Remarks: (1) the split type hole sealing (2) is a hole sealing pipe hole sealing under the whole process
The separation type hole sealing of the table 1 saves the length of the hole sealing pipe by 15-51 m compared with the hole sealing pipe hole sealing under the whole process.
2. Group extraction parameter comparison
The extraction flow of the group of the drawing is compared in the figure 5, and the mixed flow of the separated hole sealing is 0.07-0.23 m 3 Per min, the hole sealing pipe is 0.07 to 0.14m in the whole process 3 And/min, the flow rate of the separated whole-process extraction hole sealing group is larger 7 days before the whole-process extraction hole sealing group is opened, and the flow rate of the separated whole-process extraction hole sealing group is basically consistent with the flow rate of the whole-process lower hole sealing pipe hole sealing after 7 days.
3. Group extraction parameter comparison
FIG. 6 is a graph showing the maximum daily extraction purity of 38.6m for a split full-process extraction hole sealing group 3 Minimum 2.6m 3 The daily extraction purity of the hole sealing group of the hole sealing pipe is 27.1m at maximum in the whole process 3 Minimum 3.2m 3 The extraction purity is approximately the same, and the whole extraction hole sealing group with the maximum extraction purity separated is slightly higher.
4. Economic benefit analysis
TABLE 2 comparative cost of hole sealing materials (taking the test borehole average hole depth of 41m as an example)
The cost of the separated hole sealing in table 2 is about 680 yuan, the cost of the hole sealing pipe in the whole process is about 1118 yuan, and compared with the reduction of 468 yuan of the cost of the hole sealing pipe material, the material cost of the hole sealing pipe fixing device is increased by 30 yuan. The cost of single hole of separated hole sealing is 438 yuan less than that of hole sealing pipe under whole course, the length of 22204 bottom suction roadway is 1365m, the drilling engineering 170 groups are designed, statistics is carried out according to the minimum 5 holes of each group, and the cost of hole sealing pipe can be saved by using the technology above 37.2 ten thousand yuan.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the technical solutions described in the foregoing embodiments, or equivalents may be substituted for some of the technical features thereof; any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A through-layer drilling separation type whole-course gas extraction hole sealing device comprises: drilling holes are drilled in the coal seam, and the drilling hole top is formed in the two 1 coal seams, and is characterized in that: an upper hole sealing pipe is arranged in the inner cavity of the drilling air chamber, a lower hole sealing pipe is arranged at the lower end of the drilling, holes are formed in the upper hole sealing pipe, holes are formed in the lower hole sealing pipe, a conical plug is arranged at the top of the upper hole sealing pipe, a hole sealing pipe fixing device is sleeved on the pipe wall of the upper hole sealing pipe, the upper hole sealing pipe is conveyed into the upper part of the drilling air chamber through a pushing rod against the conical plug, an upper bag and a lower bag are arranged in a cavity formed by the outer pipe wall of the lower hole sealing pipe and the inner pipe wall of the drilling air chamber, expansion slurry is filled in the upper bag and the lower bag, an expansion slurry is filled in a middle cavity formed by the upper bag and the lower bag, a grouting pipe is arranged on the lower hole sealing pipe, and a valve is arranged on the grouting pipe and is filled with the expansion slurry through the grouting pipe; the upper hole sealing pipe and the lower hole sealing pipe are separated.
2. The through-layer drilling separation type whole-course gas extraction hole sealing device according to claim 1, wherein the device is characterized in that: the hole sealing pipe fixing device is a cotton cloth bag, a zipper is arranged on the cotton cloth bag, and polyurethane is injected through the zipper.
3. The through-layer drilling separation type whole-course gas extraction hole sealing device according to claim 2, wherein the device is characterized in that: the cotton cloth bag is sleeved on the pipe wall of the upper hole sealing pipe, and the diameter of the cotton cloth bag is determined according to the diameter of the upper hole sealing pipe.
4. The through-layer drilling separation type whole-course gas extraction hole sealing device according to claim 1, wherein the device is characterized in that: the push rod is a metal push rod made of hollow alloy steel pipes.
5. The through-layer drilling separation type whole-course gas extraction hole sealing device according to claim 4, wherein the device is characterized in that: the push rod is formed by splicing a plurality of small push rods with the phi of 10mm and the d of 1m, quick connectors are installed at two ends of the small push rods, one ends of the small push rods are female connectors, and the other ends of the small push rods are male connectors to realize quick butt joint.
6. The through-layer drilling separation type whole-course gas extraction hole sealing device according to claim 1, wherein the device is characterized in that: the expansion slurry is expansion cement.
7. A hole sealing method for a layer-penetrating drilling separation type whole-course gas extraction is characterized by comprising the following steps of:
the method comprises the following steps:
step 1: drilling holes at positions 1-2 m below the coal seeing point without crack development, so that the diameter of the drilled holes reaches 94mm, the drilled holes penetrate through the coal seam to enter the coal seam for 1-2 m to stop drilling, and the gas is light and is gathered in a space 1-2 m at the top of the drilled holes to form a drilling gas chamber;
step 2: after drilling holes and checking acceptance, preparing an upper hole sealing pipe with the diameter of 50mm corresponding to the length of the coal section of the drilling gas chamber, and determining the position of the upper hole sealing pipe sleeved by the hole sealing pipe fixing device according to the position height of the hole wall without coal slurry retention in the formed drilling gas chamber, wherein the hole wall without coal slurry retention is suitable for expansion and solidification of polyurethane filled in the hole sealing pipe fixing device;
step 3: according to the position where the hole sealing pipe fixing device is sleeved, which is determined in the step 2, the hole sealing pipe fixing device of the cotton cloth bag with the diameter of 65-70 mm is sleeved on the upper hole sealing pipe, and a plurality of circles of paper adhesive tapes are wound at the hole sealing pipe at the fixed position to prevent the paper adhesive tapes from slipping down; opening the zipper of the hole sealing pipe fixing device, taking 20-30 g of polyurethane to rub the polyurethane under 3-5 hands for mixing, pouring the polyurethane into the hole sealing pipe fixing device through a zipper opening, and closing the zipper;
step 4: according to the length of the drilling hole, installing a plurality of sections of small pushing rods through a quick connector to enable the total length of the metal pushing rods to be larger than the length of a drilling hole air chamber, pushing the conical plug of the upper sealing hole pipe by using the spliced metal pushing rods, sending the upper sealing hole pipe provided with the sealing hole pipe fixing device in the step 3 into the drilling hole air chamber at the top end of the drilling hole, after 5-15 min, withdrawing the metal pushing rods after the diameter of polyurethane injected in the step 3 reaches 120-150 mm after expansion, and can be pressed by 2-3 MPa;
step 5: an upper bag is fixed at a position 9m away from a drilling pipe orifice, a lower hole sealing pipe is inserted in the middle of the bag, and a lower bag is fixed at a position 1m away from the drilling pipe orifice, so that a closed cavity is formed by the two bags, the inner wall of a drilling air chamber and the outer wall of the lower hole sealing pipe, and a grouting pipe is connected to the lower bag;
step 6: pouring the expansion cement into a stirring barrel, stirring the expansion cement and water in a ratio of 1:0.8 to form paste, immersing a slurry suction port of a portable grouting pump in the stirring barrel, connecting a slurry outlet of the grouting pump with a grouting pipe, grouting into a cavity in the step 5, and stopping grouting when the pumping pressure of the grouting pump reaches 1.5MPa and does not rise any more;
step 8: and after the grouting outlet of the grouting pump is pulled out from the grouting pipe, closing the valve on the grouting pipe, and closing the pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810056272.1A CN108086945B (en) | 2018-01-20 | 2018-01-20 | Layer-penetrating drilling separation type whole-course gas extraction hole sealing device and hole sealing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810056272.1A CN108086945B (en) | 2018-01-20 | 2018-01-20 | Layer-penetrating drilling separation type whole-course gas extraction hole sealing device and hole sealing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108086945A CN108086945A (en) | 2018-05-29 |
| CN108086945B true CN108086945B (en) | 2023-10-03 |
Family
ID=62183231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810056272.1A Active CN108086945B (en) | 2018-01-20 | 2018-01-20 | Layer-penetrating drilling separation type whole-course gas extraction hole sealing device and hole sealing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108086945B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611083A (en) * | 2018-12-18 | 2019-04-12 | 华北科技学院 | A kind of mash gas pumping drilling gas leakage amount determining device |
| CN109594951B (en) * | 2019-01-23 | 2024-04-09 | 石家庄铁道大学 | Method for plugging small catheter grouting orifice |
| CN110439607B (en) * | 2019-09-10 | 2021-03-16 | 河南理工大学 | Cross-layer drilling separated type whole-course gas extraction hole sealing device and hole sealing method |
| CN112196498B (en) * | 2020-09-28 | 2022-09-02 | 河南理工大学 | Cross-layer drilling separated type whole-course gas extraction hole sealing device |
| CN113279729B (en) * | 2021-06-10 | 2022-03-22 | 中国矿业大学(北京) | Gas extraction method for leaking stoppage and concentration |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101614134A (en) * | 2009-07-15 | 2009-12-30 | 中国矿业大学 | Bore, quick-fried, take out Trinity pressure-relief outburst-prevention method |
| CN203476278U (en) * | 2013-09-12 | 2014-03-12 | 王玉奇 | Grouting type hole sealing and automatic water discharging device for underground drilling gas extraction |
| CN104295263A (en) * | 2014-08-19 | 2015-01-21 | 徐州中矿贝壳迈宁矿业科技有限公司 | Radial hole sealing device for drill holes for exhausting coal bed gas |
| CN105114030A (en) * | 2015-08-20 | 2015-12-02 | 中国矿业大学 | Gas extraction drilling non-solidification constant-pressure slurry hole sealing method |
| CN105863556A (en) * | 2016-06-03 | 2016-08-17 | 淮南大屯注浆工程有限公司 | Coal-mine gas extraction drilling pressurized grouting rapid hole packer and use method thereof |
| CN105888603A (en) * | 2016-04-13 | 2016-08-24 | 中煤科工集团西安研究院有限公司 | Coal mine underground gas drainage drilling high-speed sealing device and using method |
| CN106437612A (en) * | 2016-10-25 | 2017-02-22 | 中煤科工集团重庆研究院有限公司 | Horizontal gas extraction drilling and hole-sealing method and hole-sealing structure thereof |
| WO2017075935A1 (en) * | 2015-11-06 | 2017-05-11 | 中国矿业大学 | Method of increasing permeability of coal seam using high-power electric blasting assisted by hydraulic fracturing from bottom drainage roadway |
| CN207795147U (en) * | 2018-01-20 | 2018-08-31 | 仝耀军 | A kind of layer-through drilling separate type whole process gas drainage hole sealing device |
-
2018
- 2018-01-20 CN CN201810056272.1A patent/CN108086945B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101614134A (en) * | 2009-07-15 | 2009-12-30 | 中国矿业大学 | Bore, quick-fried, take out Trinity pressure-relief outburst-prevention method |
| CN203476278U (en) * | 2013-09-12 | 2014-03-12 | 王玉奇 | Grouting type hole sealing and automatic water discharging device for underground drilling gas extraction |
| CN104295263A (en) * | 2014-08-19 | 2015-01-21 | 徐州中矿贝壳迈宁矿业科技有限公司 | Radial hole sealing device for drill holes for exhausting coal bed gas |
| CN105114030A (en) * | 2015-08-20 | 2015-12-02 | 中国矿业大学 | Gas extraction drilling non-solidification constant-pressure slurry hole sealing method |
| WO2017075935A1 (en) * | 2015-11-06 | 2017-05-11 | 中国矿业大学 | Method of increasing permeability of coal seam using high-power electric blasting assisted by hydraulic fracturing from bottom drainage roadway |
| CN105888603A (en) * | 2016-04-13 | 2016-08-24 | 中煤科工集团西安研究院有限公司 | Coal mine underground gas drainage drilling high-speed sealing device and using method |
| CN105863556A (en) * | 2016-06-03 | 2016-08-17 | 淮南大屯注浆工程有限公司 | Coal-mine gas extraction drilling pressurized grouting rapid hole packer and use method thereof |
| CN106437612A (en) * | 2016-10-25 | 2017-02-22 | 中煤科工集团重庆研究院有限公司 | Horizontal gas extraction drilling and hole-sealing method and hole-sealing structure thereof |
| CN207795147U (en) * | 2018-01-20 | 2018-08-31 | 仝耀军 | A kind of layer-through drilling separate type whole process gas drainage hole sealing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108086945A (en) | 2018-05-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108086945B (en) | Layer-penetrating drilling separation type whole-course gas extraction hole sealing device and hole sealing method thereof | |
| CN108678802B (en) | Coal mine drilling, punching and drawing integrated outburst prevention device and method | |
| CN204609832U (en) | A kind of coal mine gas quick fluid filling hole sealing device with pressure | |
| CN203430473U (en) | Underground hydraulic fracturing drill hole sealing device of coal mine | |
| CN104314508A (en) | Hole sealing method for coal bed gas drainage drill hole | |
| CN204252941U (en) | Mining hole-sealing gas hole packer with pressure | |
| CN101294500A (en) | Heavy pressure slip-casting hole-sealing method for large-diameter extraction borehole | |
| CN109869125A (en) | A kind of method that liquid nitrogen is used for coal bed gas extraction with hydraulic pressure presplitting compound anti-reflection | |
| CN205063929U (en) | Colliery is sealed in pit and is pressed integration segmentation hydraulic fracturing device | |
| CN112727535A (en) | Liquid CO2Coal body cracking and permeability increasing method with cooperative drilling and water filling | |
| CN104295263A (en) | Radial hole sealing device for drill holes for exhausting coal bed gas | |
| CN105804786B (en) | A kind of weak seam bottom plate layer-through drilling pressure rushes anti-reflection method | |
| CN207583345U (en) | Mining drilling pump drainage fluid filling hole sealing device | |
| CN201206471Y (en) | Sealing device for pumping borehole | |
| CN109372572A (en) | A kind of efficient pumping method of low-permeability coal-bed gas | |
| CN103775024A (en) | Fine coal slurry hole sealing method | |
| CN204571912U (en) | Water filling hole sealing device | |
| CN204677155U (en) | A kind of down-hole coal bed high strength rapid drilling hole sealing device | |
| CN203702070U (en) | Coal mine low pumping lane borehole slag-returning sealing apparatus | |
| CN203742542U (en) | Non-pipe grouting hole sealing device | |
| CN102562069A (en) | Fluid filling and replacement mining technology for coal bed on highly confined water body | |
| CN106149677A (en) | High-pressure water-enriched goaf grouting reinforcement means | |
| CN101825417B (en) | Kerf sand inclusion blasting cartridge and blasting installation device and production technology thereof | |
| CN212958558U (en) | Drilling dynamic sealing multi-section hole packer device | |
| CN103742098A (en) | Device and method for sealing hole by using returned slag of layer-through drill hole of low drainage roadway of coal mine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230908 Address after: 461000 Yingchuan West Road, Yuzhou City, Xuchang City, Henan Province Applicant after: HENAN YONGJIN ENERGY Co.,Ltd. Address before: 461070 Production Technology Department of Henan Yongjin Energy Co., Ltd., Yuanhang Road, Yuzhou City, Xuchang City, Henan Province Applicant before: Tong Yaojun |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |