CN105927214B - Method for accurately measuring gas pressure of original coal seam - Google Patents
Method for accurately measuring gas pressure of original coal seam Download PDFInfo
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- CN105927214B CN105927214B CN201610331584.XA CN201610331584A CN105927214B CN 105927214 B CN105927214 B CN 105927214B CN 201610331584 A CN201610331584 A CN 201610331584A CN 105927214 B CN105927214 B CN 105927214B
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- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
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- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- 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
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
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Abstract
The invention discloses a device for accurately measuring the gas pressure of a coal seam, which comprises: the device comprises an expandable capsule bag (1), a quarter steel pipe (7), a high-pressure-resistant PE (polyethylene) air pipe (11), a front guider (17), a sieve hole pipe (18) and a pressure gauge (30); the front guider (17), the sieve tube (18), the quarter steel tube (7) and the expandable capsule bag (1) are connected in sequence; also discloses a measuring method using the device; the invention adopts the expansion quick-setting cement-based sealing grouting material for sealing, and the grouting material is compact, quick-setting and expandable, can effectively fill cracks in coal bodies around the drill hole, particularly top cracks, and ensures that the drill hole is sealed tightly; meanwhile, a continuous seamless high-pressure-resistant PE gas pipe is used as a pressure measuring pipe, so that a gas leakage channel is almost eliminated; the device and the measuring process solve two most critical defects of the traditional gas pressure process and the device, and have extremely good popularization value.
Description
Technical Field
The invention relates to a method for measuring coal seam gas pressure, in particular to a method for accurately measuring the coal seam gas pressure, and belongs to the technical field of coal mines.
Background
In coal mine safety mining, coal mine gas outburst accidents are the current disaster accidents causing the greatest casualties. The accurate measurement of the gas pressure of the coal seam is the most reasonable means for evaluating whether the coal seam has outburst danger or not, and is of great importance to the coal mine safety.
At present, the coal mine underground gas pressure measurement in China mostly adopts cross-layer drilling for testing, and the traditional gas pressure measurement technology has extremely low success rate in the gas pressure measurement of the coal bed.
The main reasons are that the traditional cement mortar has no expansion capability, and effective sealing of top cracks cannot be ensured in low-angle coal bed holes; secondly, the coal bed is a porous medium, and a plurality of air leakage channels can be generated under the constantly changing mine pressure environment; thirdly, the traditional quarter steel pipe and the coupling are connected in sequence and used as a pressure measuring pipe, and the serious condition of air leakage at the joint exists.
Disclosure of Invention
The invention aims to solve the problems and provide the method for accurately measuring the coal bed gas pressure, which can strictly seal the coal bed gas pressure test drill hole and accurately measure the gas pressure.
The invention achieves the above purpose through the following technical scheme: the coal bed gas pressure accurate measuring device comprises,
the device comprises an expandable capsule bag, four-section steel pipes, a high-pressure-resistant PE (polyethylene) air pipe, a front guider, a sieve hole pipe and a pressure gauge;
the front guider, the sieve hole pipe, the quarter steel pipe and the expandable capsule bag are connected in sequence;
the upper part of the sieve hole pipe is connected with a high-pressure-resistant PE (polyethylene) air pipe through a pagoda joint, the high-pressure-resistant PE air pipe penetrates through the expandable capsule bag through holes II in the left end of the expandable capsule bag and the right end of the expandable capsule bag, the right tail end of the expandable capsule bag is connected with a pressure gauge through an internal thread pagoda joint and is reinforced by at least one right hose clamp;
the left end of the quartered steel pipe is provided with a welded metal sheet, the left end of the quartered steel pipe and the sieve mesh pipe are closed, the right end of the quartered steel pipe penetrates through the expandable capsule bag through the left end of the expandable capsule bag and the eyelet I of the right end of the expandable capsule bag, and the tail end of the quartered steel pipe controls a switch through a quartered steel pipe valve;
wherein, an eyelet III is arranged on the end surface of the right end of the expandable capsule bag.
The length of the expandable capsule bag is 50-100mm, and the expandable capsule bag comprises two expandable capsule bag left end heads and two expandable capsule bag right end heads made of hard plastic materials with the same size, the diameter is 40-45mm, and the length is 30-50mm;
the left end head and the right end head of the expandable capsule bag are cylindrical, the center of the cross section of the left end head and the right end head of the expandable capsule bag is provided with a hole I with the diameter of 21mm and a hole II with the diameter of 12mm, which are not positioned at the center of a circle, and the cross section of the right end head of the expandable capsule bag is also provided with a hole III with the diameter of 6 mm.
One side of the four-section steel pipe close to the right end of the expandable capsule bag is provided with 3 eyelets IV with the diameter of 6-8mm, an elastic rubber pipe with the inner diameter of 20mm and the thickness of 3mm is sleeved at the position of the eyelet IV to prevent backflow, and the joints between the four-section steel pipe and the eyelets I are filled and sealed by silica gel.
Sleeving a latex tube with the diameter of 40-45mm and the length of 50-100mm on the outer layer of the left end head and the right end head of the expandable capsule bag, sleeving a double-layer polyester threaded cloth sleeve with the diameter of 45-50mm on the outer layer of the latex tube, and tightly bundling the left end head and the right end head of the expandable capsule bag by using a left hose clamp;
the latex tube and the double-layer polyester threaded cloth sleeve can expand under the internal pressure.
The inner diameter of the high-pressure-resistant PE air pipe is 8mm, the outer diameter of the high-pressure-resistant PE air pipe is 12mm, the bursting pressure is 3MPa, the length of the high-pressure-resistant PE air pipe is 30-40m, and the seam between the high-pressure-resistant PE air pipe and the eyelet II is filled and sealed by silica gel.
The quarter sieve hole pipe is provided with a pagoda joint, the outer diameter of the quarter sieve hole pipe is 8mm, and a series of sieve holes with the diameter of 8mm are chiseled at the position, close to the front guider, of the quarter sieve hole pipe.
The method for accurately measuring the coal bed gas pressure comprises the following steps:
1) Drilling a drill hole with the depth of 25-35 meters in an area which is not affected by artificial mining at a pressure measuring target site, wherein the hole diameter is 75mm;
2) Injecting water glass with half volume of the expandable capsule bag into the expandable capsule bag through a hole III on the right end of the expandable capsule bag, extruding the expandable capsule bag to discharge the internal air through the hole III on the right end of the expandable capsule bag, and sealing the hole III by using a pin and quick gel;
3) Sequentially connecting the front guider, the four-division sieve hole pipe and the expandable capsule bag through two four-division steel pipe couplings, connecting the foremost end of the high-pressure-resistant PE gas pipe with a pagoda joint, reinforcing the high-pressure-resistant PE gas pipe by using a right throat hoop, and wrapping the outside of the sieve holes of the four-division sieve hole pipe by using gauze;
4) The coal seam gas pressure accurate measuring device is sequentially sent into a drill hole until the coal seam gas pressure accurate measuring device is sent to the foremost end of the drill hole;
5) Injecting an expansion quick-setting cement-based sealing grouting material into the expandable capsule bag through the tail end of the four-section steel pipe to expand the expandable capsule bag, dividing the drill hole into a front section and a rear section, stopping grouting when the injection pressure of a grouting pump rises to 0.05MPa and no flow exists, closing a valve of the four-section steel pipe, and quickly condensing the expansion quick-setting cement-based sealing grouting material and water glass in the expandable capsule bag into a solid support expandable capsule bag;
6) Filling a six-point grouting pipe with the length of 1.0-1.2m at the drill hole, tightly sealing the drill hole by using a chemical grout plugging material, injecting an expansion quick-setting cement-based sealing grouting material between an expandable capsule bag and the drill hole plugging material through the six-point grouting pipe, stopping grouting when the pressure of a grouting pump rises to 0.05MPa and no flow exists, and closing a six-point grouting pipe valve at the tail end of the six-point grouting pipe;
7) Connecting the internal thread pagoda joint with a pressure gauge, firstly putting a rubber ring in the internal thread pagoda joint, filling a certain amount of silica gel into a thread, and quickly screwing to ensure that the internal thread pagoda joint and the pressure gauge are tightly sealed;
8) After waiting for 1.5 hours, after the expansion quick-setting cement-based sealing grouting material expands and solidifies, inserting the pagoda joint end of the internal thread pagoda joint into the tail end of the high-pressure-resistant PE air pipe, tightening the insertion section by adopting 2-3 right throat hoops, completing meter binding work, after the reading of the pressure gauge is stable, reading the reading of the pressure gauge, namely the relative gas pressure of the coal bed, and adding 0.1MPa to obtain the absolute gas pressure.
The expansion quick-setting cement-based sealing grouting material is prepared by uniformly mixing ordinary cement, calcium sulphoaluminate cement clinker, gypsum, lime, an air entraining agent and the like, adding water and stirring, wherein the volume expansion rate after solidification is 5-20% compared with that before solidification, and the solidification time is 1.5 hours.
The invention adopts the expansion quick-setting cement-based sealing grouting material for sealing, the grouting material is compact, quick-setting and expandable, and can effectively fill cracks in coal bodies around the drill hole, particularly top cracks, so as to ensure the tight sealing of the drill hole;
meanwhile, a continuous seamless high-pressure-resistant PE gas pipe is used as a pressure measuring pipe, so that a gas leakage channel is almost eliminated;
the device and the measuring process solve two most critical defects of the traditional gas pressure process and the device, and have extremely good popularization value.
Drawings
FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention;
FIG. 2 is a right end sectional view of the expandable capsule of the present invention;
fig. 3 is a cross-sectional view of the left end of the inflatable capsule of the present invention.
In the figure: 1. the expandable capsule bag comprises an expandable capsule bag body 2, an expandable capsule bag left end 3, an expandable capsule bag right end 4, an eyelet I, an eyelet II, an eyelet 6, an eyelet III, an eyelet 7, a quarter steel pipe 8, an eyelet IV, an eyelet 9, a rubber pipe 10, a metal sheet 11, a high pressure resistant PE (polyethylene) air pipe 12, a latex pipe 13, a double-layer terylene threaded cloth sleeve 14, a left throat hoop 15, a pin 16, a quarter steel pipe collar 17, a front guide 18, a sieve hole pipe 19, a pagoda joint 20, a right throat hoop 21, a sieve hole 22, a gauze 23, a quarter steel pipe end 24, a quarter steel pipe valve 25, a six-point grouting pipe 26, a chemical pulp plugging material 27, an expandable quick setting cement-based sealing grouting material 28, a six-point grouting pipe valve 29, an internal thread pagoda joint 30 and a pressure gauge.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Wherein, with the attached drawing 1 as a reference, the left, right, upper and lower parts of the drawing 1 are the left, right, upper and lower parts of the invention.
As shown in fig. 1 to 3, the coal seam gas pressure accurate measuring device comprises,
the device comprises an expandable capsule bag 1, a quarter steel pipe 7, a high pressure resistant PE air pipe 11, a front guider 17, a sieve hole pipe 18 and a pressure gauge 30;
the front guider 17, the sieve tube 18, the quarter steel tube 7 and the expandable capsule bag 1 are connected in sequence;
the upper part of the sieve hole pipe 18 is connected with a high pressure resistant PE air pipe 11 through a pagoda joint 19, the high pressure resistant PE air pipe 11 penetrates through the expandable capsule bag 1 through the left end 2 of the expandable capsule bag and the hole II 5 of the right end 3 of the expandable capsule bag, the right end is connected with a pressure gauge 30 through an internal thread pagoda joint 29, and at least one right throat hoop 20 is used for reinforcement;
the leftmost end of the quartered steel pipe 7 is provided with a welded metal sheet 10, the left end of the quartered steel pipe 7 and the sieve hole pipe 18 are sealed, the right end of the quartered steel pipe passes through the expandable capsule bag 1 through the left end head 2 of the expandable capsule bag and the eyelet I4 of the right end head 3 of the expandable capsule bag, and the tail end 23 of the quartered steel pipe controls the switch through a quartered steel pipe valve 24;
wherein, the end face of the right end 3 of the expandable capsule bag is provided with a hole III 6.
Wherein the expandable capsule bag 1 is 50-100mm long, and comprises two expandable capsule bag left end heads 2 and two expandable capsule bag right end heads 3 which are made of hard plastic materials with the same size, the diameter is 40-45mm, and the length is 30-50mm;
as shown in figures 2 and 3, the left end 2 and the right end 3 of the expandable capsule bag 1 are cylindrical, the center of the cross section of the expandable capsule bag is provided with a hole I4 with the diameter of 21mm and a hole II 5 with the diameter of 12mm, which is not at the center of the circle, and the cross section of the right end 3 of the expandable capsule bag is also provided with a hole III 6 with the diameter of 6 mm.
One side of the quartered steel pipe 7, which is close to the right end 3 of the expandable capsule bag, is provided with 3 eyelets IV 8 with the diameter of 6-8mm, an elastic rubber pipe 9 with the inner diameter of 20mm and the thickness of 3mm is sleeved at the position of the eyelet IV 8 to prevent backflow, and the joints between the quartered steel pipe 7 and the eyelets I4 are filled and sealed by silica gel.
The outer layers of the left end head 2 and the right end head 3 of the expandable capsule bag are sleeved with a latex tube 12 with the diameter of 40-45mm and the length of 50-100mm, the outer layer of the latex tube 12 is sleeved with a double-layer polyester threaded cloth sleeve 13 with the diameter of 45-50mm, and the latex tube 12 and the double-layer polyester threaded cloth sleeve 13 are tightly bound on the left end head 2 and the right end head 3 of the expandable capsule bag by using a left hose clamp 14;
the latex tube 12 and the double-layer polyester thread cloth cover 13 can be expanded under the internal pressure.
The inner diameter of the high-pressure resistant PE air pipe 11 is 8mm, the outer diameter of the high-pressure resistant PE air pipe is 12mm, the bursting pressure is 3MPa, the length of the high-pressure resistant PE air pipe is 30-40m, and the seam between the high-pressure resistant PE air pipe and the eyelet II 5 is filled and sealed by silica gel.
The sieve tube 18 is provided with a pagoda joint 19 with the outer diameter of 8mm, and a series of sieve holes 21 with the diameter of 8mm are chiseled on the sieve tube 18 close to the front guider 17.
The invention also discloses a method for accurately measuring the coal bed gas pressure, which comprises the following steps:
1) Drilling a drill hole with the depth of 25-35 meters in an area which is not influenced by artificial mining at a pressure measuring target site, wherein the hole diameter is 75mm;
2) Injecting water glass with half volume of the expandable capsule bag 1 into the expandable capsule bag 1 through the hole III 6 on the right end 3 of the expandable capsule bag, extruding the expandable capsule bag 1 to discharge the internal air through the hole III 6 on the right end 3 of the expandable capsule bag, and then sealing the hole III 6 by using a pin 15 and quick gel;
3) Sequentially connecting a front guider 17, a sieve hole pipe 18 and an expandable capsule bag 1 through two quarter steel pipe couplings 16, connecting the foremost end of a high-pressure-resistant PE (polyethylene) air pipe 11 with a pagoda joint 19, reinforcing the front end by using a right throat hoop 20, and wrapping the outside of a sieve hole 21 of the sieve hole pipe 18 by using gauze 22;
4) The coal seam gas pressure accurate measuring device is sequentially sent into a drill hole until the coal seam gas pressure accurate measuring device is sent to the foremost end of the drill hole;
5) Injecting an expansion quick-setting cement-based sealing grouting material 27 into the expandable capsule bag 1 through the tail end 23 of the four-section steel pipe to expand the expandable capsule bag 1, dividing the drilled hole into a front section and a rear section, finishing grouting when the injection pressure of a grouting pump rises to 0.05MPa and no flow exists, closing the valve 24 of the four-section steel pipe, and quickly condensing the expansion quick-setting cement-based sealing grouting material 27 and water glass in the expandable capsule bag 1 into a solid support expandable capsule bag 1;
6) Filling a six-part grouting pipe 25 with the length of 1.0-1.2m at the drilling hole, tightly sealing the hole opening by using a chemical grout plugging material 26, injecting an expansion quick-setting cement-based sealing grouting material 27 between the expandable capsule bag 1 and the hole opening plugging material 26 through the six-part grouting pipe 25, finishing grouting when the pressure of a grouting pump rises to 0.05MPa and no flow exists, and closing a six-part grouting pipe valve 28 at the tail end of the six-part grouting pipe 25;
7) The inner thread pagoda joint 29 is connected with the pressure gauge 30, when the connection is carried out, a rubber ring is firstly placed in the inner thread pagoda joint 29, a certain amount of silica gel is filled in a screw thread, and the inner thread pagoda joint 29 and the pressure gauge 30 are tightly sealed through quick screwing;
8) After waiting for 1.5 hours, after the expansion quick-setting cement-based sealing grouting material 27 expands and solidifies, inserting the pagoda joint end of the internal thread pagoda joint 29 into the tail end of the high-pressure-resistant PE air pipe 11, tightening the insertion section by adopting 2-3 right throat hoops 20 to finish meter binding work, and after the reading of the pressure gauge is stable, reading the reading of the pressure gauge, namely the relative gas pressure of the coal bed, and adding 0.1MPa to obtain the absolute gas pressure.
The expansion quick-setting cement-based sealing grouting material 27 is prepared by uniformly mixing ordinary cement, calcium sulphoaluminate cement clinker, gypsum, lime, an air entraining agent and the like, adding water and stirring, wherein the volume expansion rate after solidification is 5-20% compared with that before solidification, and the solidification time is 1.5 hours.
In conclusion: the invention adopts the expansion quick-setting cement-based sealing grouting material 27 for sealing, the grouting material is compact, quick-setting and expandable, and can effectively fill cracks in coal bodies around the drill hole, particularly top cracks, so as to ensure the tight sealing of the drill hole;
meanwhile, a continuous seamless high-pressure-resistant PE gas pipe 11 is used as a pressure measuring pipe, so that a gas leakage channel is almost eliminated;
the device and the measuring process solve two most critical defects of the traditional gas pressure process and the device, and have extremely good popularization value.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The method for accurately measuring the coal bed gas pressure is characterized by comprising an expandable capsule bag (1), a quarter steel pipe (7), a high-pressure-resistant PE (polyethylene) air pipe (11), a front guider (17), a sieve hole pipe (18) and a pressure gauge (30);
the front guider (17), the sieve tube (18), the quarter steel tube (7) and the expandable capsule bag (1) are connected in sequence;
the upper part of the sieve hole pipe (18) is connected with a high pressure resistant PE air pipe (11) through a pagoda joint (19), the high pressure resistant PE air pipe (11) penetrates through the expandable capsule bag (1) through a left end (2) of the expandable capsule bag and a hole II (5) of a right end (3) of the expandable capsule bag, the right end of the high pressure resistant PE air pipe is connected with a pressure gauge (30) through an internal thread pagoda joint (29), and at least one right hoop (20) is used for reinforcing the high pressure resistant PE air pipe;
the leftmost end of the quartered steel pipe (7) is provided with a welded metal sheet (10), the left end of the quartered steel pipe (7) is sealed with the sieve hole pipe (18), the right end of the quartered steel pipe penetrates through the expandable capsule bag (1) through the holes I (4) of the left end head (2) and the right end head (3) of the expandable capsule bag, and the tail end (23) of the quartered steel pipe controls the switch through a quartered steel pipe valve (24);
wherein, the end face of the right end head (3) of the expandable capsule bag is provided with a hole III (6);
the determination method comprises the following steps:
1) Drilling a drill hole with the depth of 25-35 meters in an area which is not influenced by artificial mining at a pressure measuring target site, wherein the hole diameter is 75mm;
2) Injecting water glass with half volume of the expandable capsule bag (1) into the expandable capsule bag (1) through a hole III (6) in the right end head (3) of the expandable capsule bag, extruding the expandable capsule bag (1) to discharge internal air through the hole III (6) in the right end head (3) of the expandable capsule bag, and sealing the hole III (6) by using a pin (15) and quick gel;
3) Sequentially connecting a front guider (17), a sieve hole pipe (18) and an expandable capsule bag (1) through two quarter steel pipe couplings (16), connecting the foremost end of a high-pressure-resistant PE (polyethylene) air pipe (11) with a pagoda joint (19), reinforcing the front end by using a right throat hoop (20), and wrapping the outside of a sieve hole (21) of the sieve hole pipe (18) by using gauze (22);
4) The coal bed gas pressure accurate measuring device is sequentially sent into a drill hole until the coal bed gas pressure accurate measuring device is sent to the foremost end of the drill hole;
5) Injecting an expansion quick-setting cement-based sealing grouting material (27) into the expandable capsule bag (1) through the tail end (23) of the quartered steel pipe to expand the expandable capsule bag (1), dividing the drill hole into a front section and a rear section, stopping grouting when the injection pressure of a grouting pump rises to 0.05MPa and no flow exists, closing the quartered steel pipe valve (24), and quickly condensing the expansion quick-setting cement-based sealing grouting material (27) and water glass in the expandable capsule bag (1) into a solid support expandable capsule bag (1);
6) Filling a six-point grouting pipe (25) with the length of 1.0-1.2m at the drill hole, tightly sealing the hole opening by using a chemical grout plugging material (26), injecting an expansion quick-setting cement-based sealing grouting material (27) between the expandable capsule bag (1) and the hole opening plugging material (26) through the six-point grouting pipe (25), stopping grouting when the pressure of a grouting pump rises to 0.05MPa and no flow exists, and closing a six-point grouting pipe valve (28) at the tail end of the six-point grouting pipe (25);
7) The inner thread pagoda joint (29) is connected with a pressure gauge (30), a rubber ring is firstly placed in the inner thread pagoda joint (29) during connection, a certain amount of silica gel is filled in a screw thread, and the inner thread pagoda joint (29) and the pressure gauge (30) are tightly sealed through quick tightening;
8) After waiting for 1.5 hours, after the expansion quick-setting cement-based sealing grouting material (27) expands and solidifies, inserting the pagoda joint end of the internal thread pagoda joint (29) into the tail end of the high-pressure-resistant PE air pipe (11), tightening the insertion section by adopting 2-3 right hose hoops (20) to finish the meter-binding work, after the reading of the pressure gauge is stable, reading the reading of the pressure gauge to obtain the relative gas pressure of the coal bed, and adding 0.1MPa to obtain the absolute gas pressure.
2. The method for accurately measuring the gas pressure of the coal seam according to claim 1, wherein the method comprises the following steps: the length of the expandable capsule bag (1) is 50-100mm, and the expandable capsule bag comprises two expandable capsule bag left end heads (2) and two expandable capsule bag right end heads (3) which are made of hard plastic materials with the same size, the diameter is 40-45mm, and the length is 30-50mm;
the left end (2) and the right end (3) of the expandable capsule bag (1) are cylindrical, the center of the cross section of the left end and the right end is provided with a hole I (4) with the diameter of 21mm and a hole II (5) which is not at the center of the circle and has the diameter of 12mm, and the cross section of the right end (3) of the expandable capsule bag is also provided with a hole III (6) with the diameter of 6 mm.
3. The method for accurately measuring the gas pressure of the coal seam as claimed in claim 2, wherein the method comprises the following steps: one side of the quartered steel pipe (7) close to the right end (3) of the expandable capsule bag is provided with 3 eyelets IV (8) with the diameter of 6-8mm, an elastic rubber pipe (9) with the inner diameter of 20mm and the thickness of 3mm is sleeved at the position of the eyelet IV (8) to prevent backflow, and the seam between the quartered steel pipe (7) and the eyelet I (4) is filled and sealed by silica gel.
4. The method for accurately measuring the gas pressure of the coal seam according to claim 1 or 2, wherein the method comprises the following steps: the outer layers of the left end (2) and the right end (3) of the expandable capsule bag are sleeved with a latex tube (12) with the diameter of 40-45mm and the length of 50-100mm, the outer layer of the latex tube (12) is sleeved with a double-layer polyester threaded cloth sleeve (13) with the diameter of 45-50mm, and the latex tube (12) and the double-layer polyester threaded cloth sleeve (13) are tightly bound on the left end (2) and the right end (3) of the expandable capsule bag by using a left hose clamp (14);
the latex tube (12) and the double-layer polyester threaded cloth sleeve (13) can expand under the internal pressure.
5. The method for accurately measuring the gas pressure of the coal seam according to claim 1 or 2, wherein the method comprises the following steps: the inner diameter of the high-pressure resistant PE air pipe (11) is 8mm, the outer diameter of the high-pressure resistant PE air pipe is 12mm, the bursting pressure is 3MPa, the length of the high-pressure resistant PE air pipe is 30-40m, and the seam between the high-pressure resistant PE air pipe and the eyelet II (5) is filled and sealed by silica gel.
6. The method for accurately measuring the coal seam gas pressure according to claim 1, wherein the expansion quick-setting cement-based sealing grouting material (27) is prepared by uniformly mixing ordinary cement, calcium sulphoaluminate cement clinker, gypsum, lime and an air entraining agent, adding water and stirring, and has a volume expansion rate of 5-20% after solidification and a setting time of 1.5 hours before solidification.
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Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009109008A1 (en) * | 2008-03-04 | 2009-09-11 | Trouperdale Pty Ltd | Borehole plug with a primary bladder inflation device and a pressure booster |
| CN201412140Y (en) * | 2009-01-13 | 2010-02-24 | 中矿龙科能源科技（北京）有限公司 | Bedding hole coal bed gas pressure measuring device |
| CN102889958A (en) * | 2012-10-30 | 2013-01-23 | 山西潞安矿业(集团)有限责任公司 | Coal bed gas pressure direct measurement device and pressure measurement method thereof |
| CN202869731U (en) * | 2012-10-30 | 2013-04-10 | 山西潞安矿业(集团)有限责任公司 | Device for directly measuring gas pressure in coal seam |
| CN103075148A (en) * | 2013-02-19 | 2013-05-01 | 中国矿业大学 | Method and device for fast measuring coal bed gas pressure through upward remote-distance hole drilling |
| CN103075149A (en) * | 2013-02-19 | 2013-05-01 | 中国矿业大学 | Method and device for quickly determining gas pressure of coal bed in downward superdeep borehole |
| CN203050790U (en) * | 2013-01-22 | 2013-07-10 | 中国矿业大学 | Testing device for predicting coal bed released gas expansion energy |
| CN203145925U (en) * | 2013-02-19 | 2013-08-21 | 中国矿业大学 | Device for quickly measuring coal seam gas pressure by upward remote drilling |
| CN103510943A (en) * | 2013-10-29 | 2014-01-15 | 华北科技学院 | Instrument for measuring initial velocity of gas discharged from deep drill hole for coal mine outburst prediction |
| CN103883276A (en) * | 2014-02-18 | 2014-06-25 | 六盘水师范学院 | Simple, economic and efficient coal seam gas drainage drilling hole sealing method |
| CN103953331A (en) * | 2014-04-29 | 2014-07-30 | 河南理工大学 | Self-drilling type in-situ measuring device of coal seam gas pressure |
| CN204212733U (en) * | 2014-10-09 | 2015-03-18 | 华北科技学院 | A kind of gun drilling pressure measurement plugging device |
| CN204225875U (en) * | 2014-10-27 | 2015-03-25 | 安徽理工大学 | A kind of Fast Measurement coal-bed gas pressure device |
| CN204511425U (en) * | 2014-11-05 | 2015-07-29 | 中国神华能源股份有限公司 | The determinator of coal-bed gas pressure |
| CN204532410U (en) * | 2015-01-19 | 2015-08-05 | 六盘水师范学院 | The device of sustainable directly monitoring gas discharge drilling sealing effect |
| WO2016019825A1 (en) * | 2014-08-07 | 2016-02-11 | 翟成 | Enhanced phase-change fracking gas extraction method for low-permeability coal bed |
| CN205618152U (en) * | 2016-05-19 | 2016-10-05 | 六盘水师范学院 | This coalbed gas pressure accurate determination device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102383781B (en) * | 2011-07-15 | 2014-01-08 | 河南理工大学 | Method for measuring gas pressure of coal bed |
| CN103452522B (en) * | 2013-09-09 | 2017-05-31 | 河南理工大学 | Gas pumping wears formula plugging device and its application method |
| CN204152475U (en) * | 2014-10-20 | 2015-02-11 | 山西晋城无烟煤矿业集团有限责任公司 | Layer-through drilling list pouch hole sealing device |
-
2016
- 2016-05-19 CN CN201610331584.XA patent/CN105927214B/en not_active Expired - Fee Related
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009109008A1 (en) * | 2008-03-04 | 2009-09-11 | Trouperdale Pty Ltd | Borehole plug with a primary bladder inflation device and a pressure booster |
| CN201412140Y (en) * | 2009-01-13 | 2010-02-24 | 中矿龙科能源科技（北京）有限公司 | Bedding hole coal bed gas pressure measuring device |
| CN102889958A (en) * | 2012-10-30 | 2013-01-23 | 山西潞安矿业(集团)有限责任公司 | Coal bed gas pressure direct measurement device and pressure measurement method thereof |
| CN202869731U (en) * | 2012-10-30 | 2013-04-10 | 山西潞安矿业(集团)有限责任公司 | Device for directly measuring gas pressure in coal seam |
| CN203050790U (en) * | 2013-01-22 | 2013-07-10 | 中国矿业大学 | Testing device for predicting coal bed released gas expansion energy |
| CN103075148A (en) * | 2013-02-19 | 2013-05-01 | 中国矿业大学 | Method and device for fast measuring coal bed gas pressure through upward remote-distance hole drilling |
| CN103075149A (en) * | 2013-02-19 | 2013-05-01 | 中国矿业大学 | Method and device for quickly determining gas pressure of coal bed in downward superdeep borehole |
| CN203145925U (en) * | 2013-02-19 | 2013-08-21 | 中国矿业大学 | Device for quickly measuring coal seam gas pressure by upward remote drilling |
| CN103510943A (en) * | 2013-10-29 | 2014-01-15 | 华北科技学院 | Instrument for measuring initial velocity of gas discharged from deep drill hole for coal mine outburst prediction |
| CN103883276A (en) * | 2014-02-18 | 2014-06-25 | 六盘水师范学院 | Simple, economic and efficient coal seam gas drainage drilling hole sealing method |
| CN103953331A (en) * | 2014-04-29 | 2014-07-30 | 河南理工大学 | Self-drilling type in-situ measuring device of coal seam gas pressure |
| WO2016019825A1 (en) * | 2014-08-07 | 2016-02-11 | 翟成 | Enhanced phase-change fracking gas extraction method for low-permeability coal bed |
| CN204212733U (en) * | 2014-10-09 | 2015-03-18 | 华北科技学院 | A kind of gun drilling pressure measurement plugging device |
| CN204225875U (en) * | 2014-10-27 | 2015-03-25 | 安徽理工大学 | A kind of Fast Measurement coal-bed gas pressure device |
| CN204511425U (en) * | 2014-11-05 | 2015-07-29 | 中国神华能源股份有限公司 | The determinator of coal-bed gas pressure |
| CN204532410U (en) * | 2015-01-19 | 2015-08-05 | 六盘水师范学院 | The device of sustainable directly monitoring gas discharge drilling sealing effect |
| CN205618152U (en) * | 2016-05-19 | 2016-10-05 | 六盘水师范学院 | This coalbed gas pressure accurate determination device |
Non-Patent Citations (10)
| Title |
|---|
| "Safety line method for the prediction of deep coal-seam gas pressure and its application in coal mines ";Liang Wang;《Safety Science》;20120331;第50卷(第3期);全文 * |
| "下行超深钻孔快速测定煤层瓦斯压力技术";蒋承林，等;《中国煤炭》;20140531;第40卷(第5期);全文 * |
| "在岩巷和煤巷中测定煤层瓦斯压力封孔工艺分析";黄鑫业，蒋承林;《煤矿现代化》;20101231(第6期);全文 * |
| "基于煤层瓦斯压力测定的注浆封孔技术研究";白克新，等;《科协论坛(下半月)》;20121231(第12期);全文 * |
| "带压注浆封孔工艺在测定煤层瓦斯压力中的应用";公衍伟，等;《煤矿开采》;20130430;第18卷(第2期);全文 * |
| "瓦斯抽采钻孔密封质量的简易监测方法及现场试验";任青山，等;《矿业安全与环保》;20160202;第43卷(第1期);全文 * |
| "聚氨酯—胶囊二次注浆封孔测压技术";陈学习，等;《华北科技学院学报》;20160430;第13卷(第2期);全文 * |
| "胶囊粘液封孔器在测定煤层高瓦斯压力时失效成因分析";吴爱军;《中国安全生产科学技术》;20130228;第9卷(第2期);全文 * |
| "胶囊-聚氨酯联合封孔测压技术的研究与应用";蒋云，等;《中国安全生产科学技术》;20150731;第11卷(第7期);全文 * |
| "钻孔煤层瓦斯压力测定";张德元，等;《矿山地质灾害成灾机理与防治技术研究与应用》;20090818;全文 * |
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