CN106988730B - Coal seam gas parameter measuring probe and using method thereof - Google Patents
Coal seam gas parameter measuring probe and using method thereof Download PDFInfo
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- CN106988730B CN106988730B CN201710403170.8A CN201710403170A CN106988730B CN 106988730 B CN106988730 B CN 106988730B CN 201710403170 A CN201710403170 A CN 201710403170A CN 106988730 B CN106988730 B CN 106988730B
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- 239000000523 sample Substances 0.000 title claims abstract description 142
- 239000003245 coal Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005553 drilling Methods 0.000 claims description 28
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 10
- 229910052802 copper Inorganic materials 0.000 claims description 10
- 239000010949 copper Substances 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000009530 blood pressure measurement Methods 0.000 abstract description 9
- 238000007789 sealing Methods 0.000 abstract description 5
- 238000010276 construction Methods 0.000 abstract description 4
- 238000001125 extrusion Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000003556 assay Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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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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- General Life Sciences & Earth Sciences (AREA)
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- Force Measurement Appropriate To Specific Purposes (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention relates to a probe for measuring gas parameters in a coal seam and a using method thereof. The invention has small workload during construction, can realize self-sealing after the probe is nailed into the coal body for a certain distance due to the extrusion of the coal body and the probe, ensures that the real gas pressure of the position of the probe piezometer tube can be measured, and has shorter required test time. The method can shorten the period of gas pressure measurement, improve the success rate of pressure measurement, judge the damage type of coal by the difficulty degree of nailing in the process of measuring the nailing of the probe into the coal body, provide a basis for measuring related parameters of gas, and has strong practicability and is worthy of popularization.
Description
Technical Field
The invention belongs to the technical field of coal mines, and particularly relates to a gas parameter measuring probe in a coal seam and a using method thereof.
Background
The existing methods for measuring related parameters of coal bed gas have defects of different degrees, for example, the existing method for measuring the pressure of the coal bed gas can only measure the pressure by drilling and sealing holes in the coal bed, the method has large construction workload, longer measuring period and difficult guarantee of the sealing effect, and the pressure cannot be measured due to gas leakage; the hardness of the coal body needs to be measured by sampling in the coal bed and using a laboratory drop hammer method, and the defects are that the workload is large and the error is large; the coal damage degree can be judged only by observation, the error is large, the subjectivity is strong, and the quantitative reaction cannot be carried out.
Disclosure of Invention
In view of the above, the invention provides a probe for measuring parameters of gas in a coal seam and a using method thereof, so as to solve the defects in the prior art.
The technical scheme of the invention is as follows: the utility model provides a gas parameter survey probe in coal seam, includes that conical head, pressure-measuring pipe, first probe are responsible for and a plurality of second probe are responsible for that from left to right can dismantle the connection in proper order.
Preferably, the detachable connection mode is a threaded connection, all threads are coarse threads, and the thread pitch and the thread height of all threads are the same.
Preferably, the conical head comprises a conical end, a cylindrical section and a connecting section which are fixedly connected in sequence, the conical angle of the conical end is less than 45 degrees, the outer diameter of the cylindrical section is 10-15 mm, the length of the cylindrical section is 3-10 mm, the connecting section is provided with an internal thread for connection, the internal thread is matched with an external thread on the pressure measuring pipe, the thread length of the internal thread is more than or equal to 10mm, the drilling depth of a thread bottom hole is more than or equal to 11mm, and the thread bottom hole is flat.
Preferably, the outer diameter range of the pressure measuring pipe is 8-13 mm, the inner diameter is 3-8 mm, and the length of the connecting thread is more than or equal to 10 mm; a plurality of through holes are uniformly distributed on the circumference of the pressure measuring pipe, and the diameter of each through hole is phi 1 mm.
Preferably, the outer diameter of the first probe main pipe connected with the pressure measuring pipe is equal to the outer diameter of the cylindrical section of the conical head, and the outer diameter and the inner diameter of the second probe main pipe are equal to those of the first probe main pipe.
Preferably, the inner diameter range of the first probe main pipe is 3-8 mm, the outer diameter range is 8-15 mm, the left end of the first probe main pipe is provided with a chamfer angle of <45 degrees, and the diameter of the chamfered left end is equal to that of the pressure measuring pipe.
A use method of a gas parameter measuring probe in a coal seam comprises the following steps:
step 4, connecting the probes in sequence according to the sequence of the probe conical head, the pressure measuring pipe, the first probe main pipe and the plurality of second probe main pipes;
step 5, inserting the connected probes into central holes of three positioners in the positioning tube through a probe connection guide tube, wherein the conical heads of the probes prop against the coal body in front of the drill hole, and the tail distances of the probes are 100-200 mm from the outer openings of the guide tube;
step 6, inserting the impact tube into the positioning tube for fixing, ensuring firmness and no shaking, pushing the impact tube into a copper impact slide block, and inserting the probe tail into a center hole of the impact slide block;
8, stopping hammering by the air pick when the probe is driven into the coal body by 500mm, and pulling out a hammer head of the air pick;
and 14, taking out the probe by using the reverse strand after the measurement is finished.
Compared with the prior art, the probe for measuring the gas parameter in the coal seam has the beneficial effects that:
1. when bedding gas pressure measurement is carried out in a coal seam, the procedures of moving a drilling machine and drilling are omitted, construction can be completed only by a light pneumatic drill and a light pneumatic pick, and the workload is low.
2. When the probe is nailed into the coal body, the coal body and the probe are extruded, self-sealing can be realized after the probe is nailed into the coal body for a certain distance, and the true gas pressure of the position of the probe piezometer tube can be measured.
3. When the probe is driven in, the gas can only be dissipated through the inner hole of the probe, the loss amount is small, and the gas pressure balance space required by the whole pressure measurement is small, so that the required test time is short.
4. The method can shorten the period of gas pressure measurement, improve the success rate of pressure measurement, judge the damage type of the coal through the difficulty degree of nailing in the process of measuring the nailing of the probe into the coal body, and provide a basis for measuring related parameters of the gas.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic view showing the assembly of the measurement probe of the present invention at the time of mounting.
FIG. 3 is a schematic view of an orifice fixing tube of the assay probe of the present invention.
FIG. 4 is a cross-sectional view of a copper slider according to the present invention.
FIG. 5 is a schematic view of the pressure sensing assembly of the pressure sensing probe of the present invention.
FIG. 6 is a schematic view of the guiding orientation device of the present invention.
FIG. 7 is a cross-sectional view of the probe connection guide tube of the present invention.
Description of reference numerals:
1. a conical head; 2. a piezometric tube; 3. a first probe main tube; 4. an orifice mount tube; 5. a guide locator; 6. hammering the guide pipe; 7. the guide pipe compresses the nut; 8. a guide pipe pressing clamp; 9. an impingement tube; 10. a pneumatic pick hammer head; 11. a pneumatic pick; 12. a coal body; 13. a shock tube retainer ring; 14. a slider made of copper; 15. the shock tube compression nut; 16. a shock tube compression clamp; 17. pressing an air pipe; 18. a pressure gauge; 19. a three-way valve; 20. a second probe main tube.
Detailed Description
The invention provides a probe for measuring parameters of gas in a coal seam and a using method thereof, and the invention is explained below by combining the structural schematic diagrams of figures 1-7.
As shown in fig. 1 to 7, the probe for measuring gas parameters in a coal seam and the using method thereof provided by the invention comprise a conical head 1, a pressure measuring pipe 2, a first probe main pipe 3 and a plurality of second probe main pipes 20 which are detachably connected in sequence from left to right.
Furthermore, the detachable connection mode is threaded connection, all threads are coarse threads, and the thread pitch and the thread height of all the threads are the same.
Furthermore, the conical head 1 comprises a conical end, a cylindrical section and a connecting section which are fixedly connected in sequence, the conical angle of the conical end is less than 45 degrees, the outer diameter of the cylindrical section is 10-15 mm, the length of the cylindrical section is 3-10 mm, an internal thread for connection is arranged on the connecting section, the internal thread is matched with an external thread on the pressure measuring pipe, the length of the internal thread is more than or equal to 10mm, the drilling depth of a threaded bottom hole is more than or equal to 11mm, and the threaded bottom hole is flat.
Furthermore, the outer diameter range of the pressure measuring pipe 2 is 8-13 mm, the inner diameter is 3-8 mm, and the length of the connecting thread is more than or equal to 10 mm; a plurality of through holes are uniformly distributed on the circumference of the pressure measuring pipe 2, and the diameter of each through hole is phi 1 mm.
Further, the outer diameter of the first probe main pipe 3 connected with the pressure measuring pipe 2 is equal to the outer diameter of the cylindrical section of the conical head 1, and the outer diameter and the inner diameter of the second probe main pipe 20 and the first probe main pipe 3 are equal.
Further, the 3 internal diameter scopes of first probe person in charge are at 3 ~ 8mm, and the external diameter scope is 8 ~ 15mm, and the left end of first probe person in charge 3 has <45 chamfers, and the left end diameter after the chamfer equals with pressure-measuring pipe 2 diameter.
A use method of a gas parameter measuring probe in a coal seam comprises the following steps:
step 4, connecting probes in sequence according to the sequence of the probe conical head 1, the pressure measuring pipe 2, the first probe main pipe 3 and the plurality of second probe main pipes 20;
step 5, inserting the connected probes into central holes of three positioners in the positioning tube through a probe connection guide tube, wherein the conical heads of the probes prop against the coal body in front of the drill hole, and the tail distances of the probes are 100-200 mm from the outer openings of the guide tube;
step 6, inserting the impact tube into the positioning tube, fixing, ensuring firmness and no shaking, pushing the copper impact slide block into the impact tube, and inserting the probe tail into a center hole of the impact slide block;
8, stopping hammering by the air pick when the probe is driven into the coal body by 500mm, and pulling out a hammer head of the air pick;
and 14, taking out the probe by using the reverse strand after the measurement is finished.
According to the probe for measuring the gas parameter in the coal bed and the using method thereof, when bedding gas pressure is measured in the coal bed, the procedures of moving a drilling machine and drilling are omitted, construction can be completed only by a light pneumatic drill and a light pneumatic pick, and the workload is small; when the probe is nailed into the coal body, the coal body and the probe are extruded, self-sealing can be realized after the probe is nailed into the coal body for a certain distance, and the true gas pressure of the position of the probe piezometer tube can be measured; when the probe is driven in, the gas can only be dissipated through the inner hole of the probe, the loss amount is small, and the gas pressure balance space required by the whole pressure measurement is small, so that the required test time is short. The method can shorten the period of gas pressure measurement, improve the success rate of pressure measurement, judge the damage type of coal by the difficulty degree of nailing in the process of measuring the nailing of the probe into the coal body, provide a basis for measuring related parameters of gas, and has strong practicability and is worthy of popularization.
The above disclosure is only for the preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.
Claims (6)
1. The probe for measuring the gas parameter in the coal seam is characterized by comprising a conical head (1), a pressure measuring pipe (2), a first probe main pipe (3) and a plurality of second probe main pipes (20), wherein the conical head (1), the pressure measuring pipe (2), the first probe main pipe (3) and the plurality of second probe main pipes (20) are sequentially detachably connected from left to right, the conical head (1) comprises a conical end, a cylindrical section and a connecting section which are sequentially and fixedly connected, the outer diameter of the first probe main pipe (3) connected with the pressure measuring pipe (2) is equal to the outer diameter of the cylindrical section of the conical head (1), the outer diameters and the inner diameters of the second probe main pipes (20) and the first probe main pipe (3) are equal, and the outer diameter of the;
the using method of the probe for measuring the gas parameter in the coal seam comprises the following steps:
s1, drilling a bottom hole perpendicular to the coal wall by using an air drill at a preset pressure measuring point, and expanding the diameter of the drill hole to phi 50-90 mm by using a step type expanding drill bit, wherein the depth of the drill hole is 1.2 m;
s2, feeding an orifice fixing pipe with a diameter of 55-75 mm and a total length of 1.4m and a conical head into a guide drilling hole, inserting the guide drilling hole, wherein the exposed steel pipe of the guide drilling hole is 0.2m long, and nailing a wedge nail or filling an expansive quick setting material around the guide drilling hole to ensure that the orifice fixing pipe is fixed in the drilling hole and is not loosened;
s3, inserting a hammering guide pipe which is phi 45-65 mm and has a total length of 1.5m and is provided with a front positioner and a rear positioner into the orifice fixing pipe, fixing the hammering guide pipe into the orifice fixing pipe by using a fixing pipe conical head, a pressing clamp and a pressing nut, and after the hammering guide pipe is arranged, enabling the rear positioner to be 500-800 mm away from an outer opening of the guide pipe;
s4, connecting probes in sequence according to the sequence of the probe conical head (1), the pressure measuring pipe (2), the first probe main pipe (3) and the plurality of second probe main pipes (20);
s5, inserting the well-connected probes into central holes of three positioners in the positioning tube through the probe connection guide tube, wherein the conical heads of the probes prop against the coal body in front of the drill hole, and the tail distances of the probes are 100-200 mm from the outer openings of the guide tube;
s6, inserting the impact tube into the positioning tube for fixing, ensuring firmness and no shaking, pushing the impact tube into the copper impact slide block, and inserting the probe tail into the center hole of the impact slide block;
s7, inserting a hammer head of an air pick connected with a compressed air pipe of the air compressor into the impact pipe, pressing the copper impact slide block tightly, and starting the air pick to drive the probe into the coal body;
s8, stopping hammering by the air pick when the probe is nailed into the coal body by 500mm, and pulling out the hammer head of the air pick;
s9, taking out the impact tube, inserting the probe into the impact tube to connect with the guide tube, connecting a section of probe main tube through the guide tube, and connecting and fastening the section of probe main tube with the front main tube by using a long screwdriver;
s10, taking out the probe to connect with the guide pipe, and repeating the steps of 6-10 until the probe conical head is deep into the coal body by 15 m;
s11, sequentially taking out the air pick hammer head, the impact pipe, the hammering guide pipe and the orifice fixing pipe;
s12, connecting a three-way valve (19) at the tail end of the probe, connecting the upper port of the other two ports of the three-way valve (19) with a valve of a pressure gauge, connecting the outlet of the valve with a pressure pipe, connecting the tail end of the pressure pipe with the pressure gauge (18), connecting the lower port of the three-way valve (19) with an exhaust valve, closing the exhaust valve, opening the valve of the pressure gauge, and starting to record the gas pressure;
s13, after the gas pressure test is finished, opening an exhaust valve to exhaust gas under pressure, and then removing a pressure gauge, a three-way valve (19), a pressure pipe and a pressure pipe joint;
s14, after the measurement, the probe is taken out by the reverse strand.
2. The probe for measuring the gas parameter in the coal seam according to claim 1, wherein the detachable connection mode is a threaded connection, all threads are coarse threads, and the thread pitch and the thread height of all threads are the same.
3. The probe for measuring the gas parameter in the coal seam according to claim 1, wherein the conical angle of the conical end is less than 45 degrees, the outer diameter of the cylindrical section is 10-15 mm, the length of the cylindrical section is 3-10 mm, the connecting section is provided with an internal thread for connection, the internal thread is matched with an external thread on a pressure measuring pipe, the thread length of the internal thread is more than or equal to 10mm, the drilling depth of a thread bottom hole is more than or equal to 11mm, and the thread bottom hole is flat.
4. The probe for measuring the gas parameter in the coal seam according to claim 1, wherein the outer diameter of the pressure measuring pipe (2) ranges from 8mm to 13mm, the inner diameter of the pressure measuring pipe ranges from 3mm to 8mm, and the length of a connecting thread is more than or equal to 10 mm; a plurality of through holes are uniformly distributed on the circumference of the pressure measuring pipe (2), and the diameter of each through hole is phi 1 mm.
5. The coal seam gas parameter measuring probe according to claim 1, wherein the inner diameter of the first probe main pipe (3) ranges from 3mm to 8mm, the outer diameter ranges from 8mm to 15mm, the left end of the first probe main pipe (3) is provided with a chamfer angle of <45 degrees, and the diameter of the chamfered left end is equal to that of the pressure measuring pipe (2).
6. The use method of the probe for measuring the gas parameter in the coal seam is characterized by comprising the following steps:
s1, drilling a bottom hole perpendicular to the coal wall by using an air drill at a preset pressure measuring point, and expanding the diameter of the drill hole to phi 50-90 mm by using a step type expanding drill bit, wherein the depth of the drill hole is 1.2 m;
s2, feeding an orifice fixing pipe with a diameter of 55-75 mm and a total length of 1.4m and a conical head into a guide drilling hole, inserting the guide drilling hole, wherein the exposed steel pipe of the guide drilling hole is 0.2m long, and nailing a wedge nail or filling an expansive quick setting material around the guide drilling hole to ensure that the orifice fixing pipe is fixed in the drilling hole and is not loosened;
s3, inserting a hammering guide pipe which is phi 45-65 mm and has a total length of 1.5m and is provided with a front positioner and a rear positioner into the orifice fixing pipe, fixing the hammering guide pipe into the orifice fixing pipe by using a fixing pipe conical head, a pressing clamp and a pressing nut, and after the hammering guide pipe is arranged, enabling the rear positioner to be 500-800 mm away from an outer opening of the guide pipe;
s4, connecting probes in sequence according to the sequence of the probe conical head (1), the pressure measuring pipe (2), the first probe main pipe (3) and the plurality of second probe main pipes (20);
s5, inserting the well-connected probes into central holes of three positioners in the positioning tube through the probe connection guide tube, wherein the conical heads of the probes prop against the coal body in front of the drill hole, and the tail distances of the probes are 100-200 mm from the outer openings of the guide tube;
s6, inserting the impact tube into the positioning tube for fixing, ensuring firmness and no shaking, pushing the impact tube into the copper impact slide block, and inserting the probe tail into the center hole of the impact slide block;
s7, inserting a hammer head of an air pick connected with a compressed air pipe of the air compressor into the impact pipe, pressing the copper impact slide block tightly, and starting the air pick to drive the probe into the coal body;
s8, stopping hammering by the air pick when the probe is nailed into the coal body by 500mm, and pulling out the hammer head of the air pick;
s9, taking out the impact tube, inserting the probe into the impact tube to connect with the guide tube, connecting a section of probe main tube through the guide tube, and connecting and fastening the section of probe main tube with the front main tube by using a long screwdriver;
s10, taking out the probe to connect with the guide pipe, and repeating the steps of 6-10 until the probe conical head is deep into the coal body by 15 m;
s11, sequentially taking out the air pick hammer head, the impact pipe, the hammering guide pipe and the orifice fixing pipe;
s12, connecting a three-way valve (19) at the tail end of the probe, connecting the upper port of the other two ports of the three-way valve (19) with a valve of a pressure gauge, connecting the outlet of the valve with a pressure pipe, connecting the tail end of the pressure pipe with the pressure gauge (18), connecting the lower port of the three-way valve (19) with an exhaust valve, closing the exhaust valve, opening the valve of the pressure gauge, and starting to record the gas pressure;
s13, after the gas pressure test is finished, opening an exhaust valve to exhaust gas under pressure, and then removing a pressure gauge, a three-way valve (19), a pressure pipe and a pressure pipe joint;
s14, after the measurement, the probe is taken out by the reverse strand.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710403170.8A CN106988730B (en) | 2017-06-01 | 2017-06-01 | Coal seam gas parameter measuring probe and using method thereof |
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| CN201710403170.8A CN106988730B (en) | 2017-06-01 | 2017-06-01 | Coal seam gas parameter measuring probe and using method thereof |
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| CN106988730B true CN106988730B (en) | 2020-08-11 |
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| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4993503A (en) * | 1990-03-27 | 1991-02-19 | Electric Power Research Institute | Horizontal boring apparatus and method |
| CN1243902A (en) * | 1998-08-03 | 2000-02-09 | 叶长生 | Construction method with pneumatic hammer to impact steel bar reinforced concrete nails |
| CN201381872Y (en) * | 2009-03-13 | 2010-01-13 | 淮南矿业(集团)有限责任公司 | Hole-sealing pressure measuring device |
| CN101705831A (en) * | 2009-10-22 | 2010-05-12 | 武汉武大巨成加固实业有限公司 | Construction method for installing support rapidly by using rear chambering self-locking anchor rod |
| CN203145001U (en) * | 2013-04-03 | 2013-08-21 | 福建岩土工程勘察研究院 | Probe static probing equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201513175U (en) * | 2009-10-23 | 2010-06-23 | 中国地质大学（北京） | Drilling tool for gathering geogas of concealed metal ores |
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2017
- 2017-06-01 CN CN201710403170.8A patent/CN106988730B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4993503A (en) * | 1990-03-27 | 1991-02-19 | Electric Power Research Institute | Horizontal boring apparatus and method |
| CN1243902A (en) * | 1998-08-03 | 2000-02-09 | 叶长生 | Construction method with pneumatic hammer to impact steel bar reinforced concrete nails |
| CN201381872Y (en) * | 2009-03-13 | 2010-01-13 | 淮南矿业(集团)有限责任公司 | Hole-sealing pressure measuring device |
| CN101705831A (en) * | 2009-10-22 | 2010-05-12 | 武汉武大巨成加固实业有限公司 | Construction method for installing support rapidly by using rear chambering self-locking anchor rod |
| CN203145001U (en) * | 2013-04-03 | 2013-08-21 | 福建岩土工程勘察研究院 | Probe static probing equipment |
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