CN212716595U - Gas pressure measuring device for cross-layer drilling - Google Patents
Gas pressure measuring device for cross-layer drilling Download PDFInfo
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- CN212716595U CN212716595U CN202021443027.5U CN202021443027U CN212716595U CN 212716595 U CN212716595 U CN 212716595U CN 202021443027 U CN202021443027 U CN 202021443027U CN 212716595 U CN212716595 U CN 212716595U
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Abstract
The utility model discloses a cross-layer drilling gas pressure measuring device, which relates to the technical field of coal mine gas treatment, and comprises a drilling machine, a drill rod, a guide pipe, a first hole sealing bag, a pressure measuring pipe, a pressure gauge, a second hole sealing bag and a third grouting pipe; the drill rod is arranged on the drilling machine, and the guide pipe is fixedly connected with the drill rod; the first hole sealing bag is fixedly connected to the outer ring of the guide pipe, and a pressure measuring air chamber is formed between the first hole sealing bag and the pressure measuring drill hole; one end of the pressure measuring pipe penetrates through the first hole sealing bag to enter the pressure measuring air chamber and is fixedly connected with the guide pipe, and the other end of the pressure measuring pipe extends out of the pressure measuring drill hole; the pressure gauge is arranged on the pressure measuring pipe; the second hole sealing bag is sealed at the orifice of the pressure measuring drill hole, and a grouting cavity is formed among the first hole sealing bag, the second hole sealing bag and the pressure measuring drill hole; one end of the third grouting pipe penetrates through the second hole sealing bag to enter the grouting cavity, and the other end of the third grouting pipe extends out of the pressure measuring drill hole. The utility model has the advantages that: the safety and the reliability are good.
Description
Technical Field
The utility model relates to a colliery gas administers technical field, especially relates to a cross layer drilling gas pressure measurement device.
Background
The gas pressure is an important parameter for marking the occurrence state of the coal bed gas, and the accurate and rapid determination of the coal bed gas pressure plays an important role in prediction, treatment, utilization and the like of the mine gas. When the gas pressure is measured by drilling holes with long elevation angles and long distance through layers, the pressure measuring pipe is difficult to put down in place due to long drilling holes, more pipes are consumed and heavy pipes, the labor intensity is high, and when personnel operate under the drilling holes, the risk that objects in the drilling holes slide down to injure people exists; the existing pressure measuring method can not realize pressure measuring drilling hole pressurized grouting at the lower section of a coal seam bottom plate, only can realize short-distance pressurized hole sealing grouting or long-distance non-pressurized grouting, and drilling holes are easy to leak gas to cause pressure measuring failure and are difficult to accurately and quickly measure pressure; the length of the pressure measuring air chamber cannot be accurately controlled, and the pressure measuring air chamber is long, so that the gas pressure is long in stable time and long in pressure measuring time.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a cross-layer drilling gas pressure measuring device that fail safe nature is good is provided.
The utility model discloses a realize solving above-mentioned technical problem through following technical means: the gas pressure measuring device for the cross-layer drilling comprises a drilling machine (1), a drill rod (2), a guide pipe (3), a first hole sealing bag (4), a pressure measuring pipe (6), a pressure gauge (7), a second hole sealing bag (10) and a third grouting pipe (12); the drill rod (2) is arranged on the drilling machine (1), and the guide pipe (3) is fixedly connected with the drill rod (2); the first hole sealing bag (4) is fixedly connected to the outer ring of the guide pipe (3), and a pressure measuring air chamber (16) is formed between the first hole sealing bag (4) and the hole bottom and the hole wall of the pressure measuring drill hole (13); one end of the pressure measuring pipe (6) penetrates through the first hole sealing bag (4) to enter the pressure measuring air chamber (16) and is fixedly connected with the guide pipe (3), and the other end of the pressure measuring pipe extends out of an orifice of the pressure measuring drill hole (13); the pressure gauge (7) is arranged on the part of the pressure measuring pipe (6) extending out of the pressure measuring drill hole (13); the second hole sealing bag (10) is sealed at the orifice of the pressure measuring drill hole (13), and a grouting cavity (17) is formed among the first hole sealing bag (4), the second hole sealing bag (10) and the hole wall of the pressure measuring drill hole (13); one end of the third grouting pipe (12) penetrates through the second hole sealing bag (10) to enter the grouting cavity (17), and the other end of the third grouting pipe extends out of the hole opening of the pressure measuring drill hole (13).
The pressure measuring air chamber is communicated with the coal bed, the pressure measuring pipe and the pressure gauge, the coal bed gas gushes to the pressure measuring air chamber to gradually reach a balance state, the coal bed gas pressure, the pressure of the pressure measuring air chamber and the pressure of the pressure gauge are equal, the coal bed gas pressure can be observed through the pressure gauge, and the purpose of measuring the coal bed gas pressure is achieved. The drilling machine and the drill rod can provide stable thrust, the drilling machine and the drill rod are used for sending the pressure measuring and hole sealing components into a preset position of a pressure measuring drill hole through the guide pipe, the risk that objects in the drill hole slide down to hurt people is reduced, the safety and reliability are good, the pressure measuring success rate is high, the working efficiency is high, the labor intensity is low, and the operation is simple; the air leakage and water leakage channels of the pressure measuring air chamber can be effectively plugged through the first hole sealing bag, the second hole sealing bag and the grouting cavity, pressure measuring drill holes outside the pressure measuring air chamber are subjected to pressurized grouting, the pressure measuring air chamber is enabled to be balanced with the coal bed gas pressure quickly, and the purpose of accurate and quick pressure measurement is achieved.
As an optimized technical scheme, the guide pipe (3) comprises a first guide pipe (31) and a second guide pipe (32), the inner end of the second guide pipe (32) is fixedly connected with the outer end of the first guide pipe (31), and the outer end of the second guide pipe (32) is fixedly connected with the drill rod (2); the first hole sealing bag (4) is fixedly connected to the outer ring of the second guide pipe (32); one end of the piezometric tube (6) positioned in the piezometric air chamber (16) is fixedly connected with the first guide tube (31). The length of first guide tube is confirmed according to the length of drilling in the coal seam, and the length of pressure measurement air chamber is controlled by first guide tube, and the length that can accurate control pressure measurement air chamber has improved pressure measurement work efficiency.
As an optimized technical scheme, the first guide pipe (31) is hollow, a plurality of small holes are uniformly distributed in the pipe wall of the first guide pipe, and the pressure measuring pipe (6) penetrates through the first hole sealing bag (4), then extends into the first guide pipe (31) and is fixedly connected to the first guide pipe (31) close to the inner end.
As an optimized technical scheme, the second guide pipe (32) is a solid pipe. The cement slurry can be prevented from entering the pressure measuring air chamber through the guide pipe during grouting.
As an optimized technical scheme, the inner end of the second guide pipe (32) is inserted into the outer end of the first guide pipe (31) and fixedly connected by an iron wire.
As an optimized technical scheme, the guide pipe (3) further comprises a retainer ring (33), the retainer ring (33) is fixedly connected to the outer ring of the second guide pipe (32), and the position from the outer end of the second guide pipe (32) to the retainer ring (33) is inserted into a connecting hole in the end part of the drill rod (2).
As an optimized technical scheme, the piezometric tube (6) adopts a hose and is a whole tube. Can avoid the air leakage of the pipeline joint.
As an optimized technical scheme, the first hole sealing bag (4) and the second hole sealing bag (10) are grouting bags; the cross-layer drilling gas pressure measuring device also comprises a first grouting pipe (5) and a second grouting pipe (11); one end of the first grouting pipe (5) extends into the inner cavity of the first hole sealing bag (4), and the other end of the first grouting pipe extends out of the orifice of the pressure measuring drill hole (13); one end of the second grouting pipe (11) extends into the inner cavity of the second hole sealing bag (10), and the other end of the second grouting pipe extends out of the orifice of the pressure measuring drill hole (13).
As an optimized technical scheme, the gas pressure measuring device for the cross-layer drill hole further comprises a drain pipe (8) and a drainage device (9), one end of the drain pipe (8) penetrates through the first hole sealing bag (4) to enter the pressure measuring air chamber (16) and is fixedly connected with the guide pipe (3), the other end of the drain pipe extends out of an orifice of the pressure measuring drill hole (13), and the drainage device (9) is installed on a part, extending out of the pressure measuring drill hole (13), of the drain pipe (8).
As an optimized technical scheme, the drain pipe (8) adopts a hose and is a whole pipe. Can avoid the air leakage of the pipeline joint.
The utility model has the advantages that:
1. the pressure measuring device can accurately and quickly measure pressure, and is good in safety and reliability, high in pressure measuring success rate, high in working efficiency, low in labor intensity and simple in operation.
2. The length of pressure measurement air chamber can accurate control, has improved pressure measurement work efficiency.
3. The cement paste can be prevented from entering the pressure measuring air chamber during grouting.
4. Can avoid the air leakage of the pipeline joint.
Drawings
Fig. 1 is a schematic structural diagram of a state before a second hole sealing bag is installed in the gas pressure measuring device for cross-layer drilling of the embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a state after a second hole sealing bag is installed in the gas pressure measuring device for cross-layer drilling of the embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a guide tube according to an embodiment of the present invention.
Detailed Description
To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are combined to clearly and completely describe the technical solution in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 and 2, the gas pressure measuring device for cross-layer drilling includes a drilling machine 1, a drill rod 2, a guide pipe 3, a first hole sealing bag 4, a first grouting pipe 5, a pressure measuring pipe 6, a pressure gauge 7, a drain pipe 8, a drainage device 9, a second hole sealing bag 10, a second grouting pipe 11, and a third grouting pipe 12.
The pressure measuring drill hole 13 penetrates through the coal seam 15 from the rock wall 14 and is a long-distance elevation cross-layer drill hole, the diameter of the pressure measuring drill hole 13 is 65-95 mm, and the depth is larger than or equal to 20 m.
The drill rod 2 is arranged on the drilling machine 1, and the guide pipe 3 is fixedly connected with the drill rod 2; the first hole sealing bag 4 is a grouting bag, the first hole sealing bag 4 is fixedly connected to the outer ring of the guide pipe 3, and a pressure measuring air chamber 16 is formed between the first hole sealing bag 4 and the hole bottom and the hole wall of the pressure measuring drill hole 13; one end of the first grouting pipe 5 extends into the inner cavity of the first hole sealing bag 4, and the other end of the first grouting pipe extends out of the orifice of the pressure measuring drill hole 13; one end of the pressure measuring pipe 6 penetrates through the first hole sealing bag 4 to enter the pressure measuring air chamber 16 and is fixedly connected with the guide pipe 3, and the other end of the pressure measuring pipe extends out of the orifice of the pressure measuring drill hole 13; the pressure gauge 7 is arranged on the part of the pressure measuring pipe 6 extending out of the pressure measuring drill hole 13; one end of the drain pipe 8 passes through the first hole sealing bag 4 to enter the pressure measuring air chamber 16 and is fixedly connected with the guide pipe 3, and the other end of the drain pipe extends out of the hole opening of the pressure measuring drill hole 13; the drainage device 9 is arranged on the part of the drainage pipe 8 extending out of the pressure measuring drill hole 13; the second hole sealing bag 10 is a grouting bag, the second hole sealing bag 10 is sealed at the hole of the pressure measuring drill hole 13, and a grouting cavity 17 is formed among the first hole sealing bag 4, the second hole sealing bag 10 and the hole wall of the pressure measuring drill hole 13; one end of the second grouting pipe 11 extends into the inner cavity of the second hole sealing bag 10, and the other end extends out of the orifice of the pressure measuring drill hole 13; one end of the third grouting pipe 12 passes through the second hole sealing bag 10 and enters the grouting cavity 17, and the other end extends out of the hole opening of the pressure measuring drill hole 13.
The pressure measuring pipe 6 adopts a plastic hose and is an integral pipe without a joint; the inner diameter of the pressure measuring pipe 6 is 5-8 mm; the pressure born by the piezometric tube 6 is 1.5 times greater than the maximum value of grouting pressure and predicted gas pressure of a coal bed, and is generally greater than or equal to 3 MPa.
The drain pipe 8 adopts a plastic hose which is a whole pipe without a joint; the inner diameter of the drain pipe 8 is 5-8 mm; the pressure born by the drain pipe 8 is 1.5 times greater than the maximum value of grouting pressure and predicted gas pressure of the coal bed, and is generally greater than or equal to 3 MPa.
As shown in fig. 3, the guide tube 3 includes a first guide tube 31, a second guide tube 32, and a retainer ring 33.
The first guide pipe 31 is a hollow steel pipe with a plurality of small holes uniformly distributed on the pipe wall, and the length of the first guide pipe 31 is determined according to the length of the pressure measuring drill hole 14 in the coal seam 15; the length of the pressure measuring air chamber 16 is controlled by a first guide pipe 31 and is slightly larger than the length of the pressure measuring drill hole 14 in the coal seam 15; one end of the pressure measuring pipe 6, which is positioned in the pressure measuring air chamber 16, is fixedly connected with the first guide pipe 31, and the pressure measuring pipe 6 penetrates through the first hole sealing bag 4, then extends into the first guide pipe 31 and is fixedly connected to the first guide pipe 31 near the inner end; one end of the drain pipe 8 located in the pressure measuring air chamber 16 is fixedly connected with the first guide pipe 31, and the drain pipe 8 passes through the first hole sealing pocket 4 and then extends into the first guide pipe 31 and is fixedly connected to the first guide pipe 31 near the outer end.
The second guide pipe 32 is a solid pipe and is made of steel bars; the outer diameter of the second guide tube 32 is less than the minimum inner diameter of the drill rod 2, typically less than 20 mm; the length of the second guide pipe 32 is 2-2.5 m; the inner end of the second guide pipe 32 is fixedly connected with the outer end of the first guide pipe 31, the inner end of the second guide pipe 32 is inserted into the outer end of the first guide pipe 31, the connection length is 0.3-0.5 m, and the second guide pipe is fixedly connected with the outer end of the first guide pipe 31 through an iron wire; the first hole sealing pocket 4 is fixedly connected to the outer ring of the second guide pipe 32.
The outer diameter of the retainer ring 33 is larger than the maximum inner diameter of the drill rod 2 and smaller than or equal to the outer diameter of the drill rod 2, and is generally 40-50 mm; the retainer ring 33 is fixedly connected to the outer ring of the second guide pipe 32, and the distance between the retainer ring 33 and the outer end of the second guide pipe 32 is 0.3 m; the outer end of the second guide pipe 32 is fixedly connected with the drill rod 2, and the second guide pipe 32 is inserted into the connecting hole at the end part of the drill rod 2 from the outer end to the retainer ring 33.
The first grouting pipe 5, the second grouting pipe 11 and the third grouting pipe 12 are respectively used for injecting cement slurry into the first hole sealing bag 4, the second hole sealing bag 10 and the grouting cavity 17, and the preparation method of the injected cement slurry comprises the following steps: determining the usage amount of the expansive non-shrinkage cement, and preparing cement slurry according to a certain proportion, wherein the grouting pressure is not lower than 1.5 times of the predicted gas pressure of the coal bed and is generally not lower than 2 MPa.
The use method of the device comprises the following steps: before use, a pressure measuring drill hole 13 is constructed on a rock wall 14 by adopting a drilling machine 1, a drill rod 2 and a matched drill bit, and the drill rod 2 and the matched drill bit are withdrawn after construction is finished; then, a pressure measuring pipe 6 and a water discharging pipe 8 are fixedly connected to the first guide pipe 31, the first guide pipe 31 is firmly connected with the second guide pipe 32, and the first hole sealing bag 4 is installed on the second guide pipe 32; then inserting a second guide pipe 32 into the drill rod 2 from the outer end of the second guide pipe to the retainer ring 33 for fixing, starting the drilling machine 1, sending the guide pipe 3, the first hole sealing bag 4, the first grouting pipe 5, the pressure measuring pipe 6 and the drain pipe 8 into the pressure measuring drill hole 13 through the drill rod 2, sending the first guide pipe 31 with the inner end of the pressure measuring pipe 6 and the inner end of the drain pipe 8 into the pressure measuring air chamber 16, and leading the outer end of the first grouting pipe 5, the outer end of the pressure measuring pipe 6 and the outer end of the drain pipe 8 out of an orifice of the pressure measuring drill hole 13; then stopping the drilling machine 1, and injecting cement slurry into the first hole sealing bag 4 through the first grouting pipe 5; after the cement slurry in the first hole sealing bag 4 is solidified, starting the drilling machine 1 and withdrawing the drill rod 2; then, a third grouting pipe 12 is put in, the orifice of the pressure measuring drill hole 13 is sealed by the second hole sealing bag 10, and cement slurry is injected into the second hole sealing bag 10 through the second grouting pipe 11; after the cement paste in the second hole sealing bag 10 is solidified, injecting cement paste into the grouting cavity 17 from the hole sealing bag 12 through a third grouting pipe; after the cement slurry in the grouting cavity 17 is solidified, a pressure gauge 7 is arranged on the part of the pressure measuring pipe 6 extending out of the pressure measuring drill hole 13, and a drainage device 9 is arranged on the part of the drainage pipe 8 extending out of the pressure measuring drill hole 13; the gas pressure of the coal seam 15 is finally measured.
The working principle of the device is as follows: the pressure measuring gas chamber 16 is communicated with the coal seam 15, the pressure measuring pipe 6 and the pressure gauge 7, the coal seam gas gushes to the pressure measuring gas chamber 16 to gradually reach a balanced state, the coal seam gas pressure, the pressure of the pressure measuring gas chamber and the pressure of the pressure gauge are equal, the coal seam gas pressure can be observed through the pressure gauge 7, and the purpose of measuring the coal seam gas pressure is achieved; the air leakage and water leakage channels of the pressure measuring air chamber 16 can be effectively blocked through the first hole sealing bag 4, the second hole sealing bag 10 and the grouting cavity 17, and pressure drilling holes 13 outside the pressure measuring air chamber 16 are grouted under pressure, so that the pressure measuring air chamber 16 is quickly balanced with the pressure of coal bed gas.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (10)
1. The utility model provides a cross layer drilling gas pressure survey device which characterized in that: the drilling machine comprises a drilling machine (1), a drill rod (2), a guide pipe (3), a first hole sealing bag (4), a pressure measuring pipe (6), a pressure gauge (7), a second hole sealing bag (10) and a third grouting pipe (12); the drill rod (2) is arranged on the drilling machine (1), and the guide pipe (3) is fixedly connected with the drill rod (2); the first hole sealing bag (4) is fixedly connected to the outer ring of the guide pipe (3), and a pressure measuring air chamber (16) is formed between the first hole sealing bag (4) and the hole bottom and the hole wall of the pressure measuring drill hole (13); one end of the pressure measuring pipe (6) penetrates through the first hole sealing bag (4) to enter the pressure measuring air chamber (16) and is fixedly connected with the guide pipe (3), and the other end of the pressure measuring pipe extends out of an orifice of the pressure measuring drill hole (13); the pressure gauge (7) is arranged on the part of the pressure measuring pipe (6) extending out of the pressure measuring drill hole (13); the second hole sealing bag (10) is sealed at the orifice of the pressure measuring drill hole (13), and a grouting cavity (17) is formed among the first hole sealing bag (4), the second hole sealing bag (10) and the hole wall of the pressure measuring drill hole (13); one end of the third grouting pipe (12) penetrates through the second hole sealing bag (10) to enter the grouting cavity (17), and the other end of the third grouting pipe extends out of the hole opening of the pressure measuring drill hole (13).
2. The cross-drilled gas pressure measurement device of claim 1, wherein: the guide pipe (3) comprises a first guide pipe (31) and a second guide pipe (32), the inner end of the second guide pipe (32) is fixedly connected with the outer end of the first guide pipe (31), and the outer end of the second guide pipe (32) is fixedly connected with the drill rod (2); the first hole sealing bag (4) is fixedly connected to the outer ring of the second guide pipe (32); one end of the piezometric tube (6) positioned in the piezometric air chamber (16) is fixedly connected with the first guide tube (31).
3. The cross-drilled gas pressure measurement device of claim 2, wherein: the first guide pipe (31) is hollow, a plurality of small holes are uniformly distributed in the pipe wall of the first guide pipe, and the pressure measuring pipe (6) penetrates through the first hole sealing bag (4), then extends into the first guide pipe (31) and is fixedly connected to the first guide pipe (31) close to the inner end.
4. The cross-drilled gas pressure measurement device of claim 2, wherein: the second guide pipe (32) is a solid pipe.
5. The cross-drilled gas pressure measurement device of claim 2, wherein: the inner end of the second guide pipe (32) is inserted into the outer end of the first guide pipe (31) and fixedly connected with the outer end of the first guide pipe through an iron wire.
6. The cross-drilled gas pressure measurement device of claim 2, wherein: the guide pipe (3) further comprises a retainer ring (33), the retainer ring (33) is fixedly connected to the outer ring of the second guide pipe (32), and the outer end of the second guide pipe (32) to the retainer ring (33) is inserted into the connecting hole in the end part of the drill rod (2).
7. The cross-drilled gas pressure measurement device according to any of claims 1 to 6, wherein: the first hole sealing bag (4) and the second hole sealing bag (10) are grouting bags; the cross-layer drilling gas pressure measuring device also comprises a first grouting pipe (5) and a second grouting pipe (11); one end of the first grouting pipe (5) extends into the inner cavity of the first hole sealing bag (4), and the other end of the first grouting pipe extends out of the orifice of the pressure measuring drill hole (13); one end of the second grouting pipe (11) extends into the inner cavity of the second hole sealing bag (10), and the other end of the second grouting pipe extends out of the orifice of the pressure measuring drill hole (13).
8. The cross-drilled gas pressure measurement device according to any of claims 1 to 6, wherein: the pressure measuring pipe (6) is a whole hose.
9. The cross-drilled gas pressure measurement device according to any of claims 1 to 6, wherein: the gas pressure measuring device for the cross-layer drill hole further comprises a drain pipe (8) and a drainage device (9), one end of the drain pipe (8) penetrates through the first hole sealing bag (4) to enter the pressure measuring air chamber (16) and is fixedly connected with the guide pipe (3), the other end of the drain pipe extends out of an orifice of the pressure measuring drill hole (13), and the drainage device (9) is installed on the part, extending out of the pressure measuring drill hole (13), of the drain pipe (8).
10. The cross-drilled gas pressure measurement device of claim 9, wherein: the drain pipe (8) adopts a hose and is a whole pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202021443027.5U CN212716595U (en) | 2020-07-21 | 2020-07-21 | Gas pressure measuring device for cross-layer drilling |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021443027.5U CN212716595U (en) | 2020-07-21 | 2020-07-21 | Gas pressure measuring device for cross-layer drilling |
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| CN212716595U true CN212716595U (en) | 2021-03-16 |
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| CN202021443027.5U Active CN212716595U (en) | 2020-07-21 | 2020-07-21 | Gas pressure measuring device for cross-layer drilling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114396254A (en) * | 2021-12-10 | 2022-04-26 | 煤炭科学技术研究院有限公司 | Auxiliary device for coal bed gas pressure measuring pipe and using method |
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2020
- 2020-07-21 CN CN202021443027.5U patent/CN212716595U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114396254A (en) * | 2021-12-10 | 2022-04-26 | 煤炭科学技术研究院有限公司 | Auxiliary device for coal bed gas pressure measuring pipe and using method |
| CN114396254B (en) * | 2021-12-10 | 2023-09-26 | 煤炭科学技术研究院有限公司 | Auxiliary device for coal bed gas piezometer tube and use method |
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