CN220726243U - Mining well deep drilling preventive two stifled one notes seal hole device - Google Patents
Mining well deep drilling preventive two stifled one notes seal hole device Download PDFInfo
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- CN220726243U CN220726243U CN202322300079.7U CN202322300079U CN220726243U CN 220726243 U CN220726243 U CN 220726243U CN 202322300079 U CN202322300079 U CN 202322300079U CN 220726243 U CN220726243 U CN 220726243U
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- grouting pipe
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- pressure
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- 238000005553 drilling Methods 0.000 title claims abstract description 22
- 238000005065 mining Methods 0.000 title claims abstract description 21
- 230000003449 preventive effect Effects 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 33
- 238000005070 sampling Methods 0.000 claims abstract description 26
- 239000011324 bead Substances 0.000 claims abstract description 23
- 238000000605 extraction Methods 0.000 claims abstract description 16
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 238000005422 blasting Methods 0.000 claims abstract description 13
- 239000003245 coal Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 13
- 230000009172 bursting Effects 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002002 slurry Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000009530 blood pressure measurement Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model provides a mining middle-deep drilling preventive two-blocking one-injection hole sealing device, which comprises: the two bags are distributed in the drill holes at intervals; the sampling tube penetrates through the two bags along the axial direction of the drilling hole, and a plurality of extraction holes are formed in the far end of the sampling tube; the proximal end of the grouting pipe is connected to the pressure pump, and the distal end of the grouting pipe is correspondingly connected with two bags in series; the proximal end of the secondary grouting pipe is provided with a quick connector, and the distal end passes through the sac at the proximal end side and then extends between the two sacks; the grouting pipe is provided with a pressure relief valve which is opened when the specified pressure is reached in the grouting pipe, so that a passage is formed between the grouting pipe and the secondary grouting pipe. The preventive type secondary grouting pipe is arranged between the two bags, the gas in the plugging area can be timely discharged through the pipe, and when the medium-deep hole grouting is performed, the preventive type secondary grouting pipe can be timely and quickly replaced for grouting under the condition that blasting beads in the grouting pipe cannot be burst, so that economic loss is saved, and hole sealing efficiency and quality are improved.
Description
Technical Field
The utility model belongs to the technical field of coal mine gas extraction theory and application, and particularly relates to a mining middle-deep drilling preventive two-blocking one-injection hole sealing device.
Background
The gas extraction is a fundamental measure for controlling gas in a coal mine, besides the complex geological conditions, the gas extraction effect is closely related to the hole sealing process, and the advantages and disadvantages of the coal bed gas drilling hole sealing process not only affect the gas extraction time, but also can be hidden danger for the safety production of the coal mine. The coal seam gas pressure measurement is an important mark for judging the coal seam gas extraction effect, and is more strict in drilling plugging work, particularly relates to medium-length hole plugging, and is more difficult. At present, a traditional two-plug one-injection hole sealing process is commonly used, wherein a pocket is respectively arranged at the position 8 m-12 m away from an orifice and a pressure pump is used for filling slurry into a grouting area between the two pockets. On the basis of high-quality plugging of the drilled holes, the gas content and gas pressure in the coal bed can be reduced through negative pressure extraction, and normal exploitation of the working face is facilitated.
The traditional two-block one-injection hole sealing device cannot judge the grouting state of a sealing grouting area, and when the sealing section is positioned in an area with better sealing performance (such as mudstone), after the two end bags are fully inflated, gas in the sealing section cannot be discharged, and in the slurry injection process, the internal pressure of the area is increased, and slurry cannot be injected, so that hole sealing fails; secondly, when the plugging section is positioned in a region with poor sealing property (such as sandstone), gas in the plugging section is easier to discharge, slurry is easier to enter the plugging region, but whether the plugging region is completely filled or not cannot be intuitively described, and the hole sealing quality is affected.
Accordingly, there is a need to provide an improved solution to the above-mentioned deficiencies of the prior art.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, and provides a mining middle and deep drilling preventive two-blocking one-hole injection sealing device.
In order to achieve the above object, the present utility model provides the following technical solutions:
a mining middle-deep drilling preventive two-blocking one-injection hole sealing device comprises:
the two sachets are distributed in the drill holes at intervals;
the sampling tube axially penetrates through the two bags along the drilling hole, and a plurality of extraction holes are formed in the distal end of the sampling tube;
the proximal end of the grouting pipe is connected to the pressure pump, and the distal end of the grouting pipe is correspondingly connected with the two bags in series;
the proximal end of the secondary grouting pipe is provided with a quick connector, and the distal end of the secondary grouting pipe penetrates through the bags at the proximal end side and then extends between the two bags;
and a pressure release valve is arranged on the grouting pipe so as to be opened when the specified pressure in the grouting pipe is reached, so that a passage is formed between the grouting pipe and the secondary grouting pipe.
Preferably, the grouting pipe and the secondary grouting pipe are provided with hoops corresponding to the bags so as to seal the bags.
Preferably, a reverse flow valve is arranged in the middle of the grouting pipe.
Preferably, the pressure release valve is a blasting bead, a corresponding liquid outlet is formed in the grouting pipe, the blasting bead seals the liquid outlet, and the blasting bead is responded to the pressure rupture of the blasting bead so as to open the liquid outlet.
Preferably, the distal end of the sampling tube is provided with a conical choke plug, the larger end of the conical choke plug is correspondingly connected with the sampling tube, and the diameter of the larger end of the conical choke plug is larger than that of the sampling tube.
Preferably, two ends of the bag are fixed on the outer wall of the sampling tube through strapping tapes.
Preferably, the collecting and measuring pipe comprises a galvanized pipe formed by splicing multiple sections, and multiple sections of galvanized pipes are connected through galvanized joints.
Preferably, the near end of the mining and testing tube is correspondingly connected with a pressure gauge so as to measure the gas pressure of the coal bed in the drill hole.
The beneficial effects are that: the preventive type secondary grouting pipe is arranged between the two bags, the gas in the plugging area can be timely discharged through the pipe, and when the medium-deep hole grouting is performed, the preventive type secondary grouting pipe can be timely and quickly replaced for grouting under the condition that blasting beads in the grouting pipe cannot be burst, so that economic loss is saved, and hole sealing efficiency and quality are improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. Wherein:
FIG. 1 is a schematic diagram of a gas extraction pipe for extracting gas according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a gas pressure detecting device for a gas sampling pipe according to an embodiment of the present utility model.
In the figure: 1. a pouch; 2. a sampling tube; 3. conical choke plug prevention; 4. extracting holes; 5. grouting pipe; 6. a reverse flow valve; 7. a pressure gauge; 8. a fast interface; 9. a pressure pump; 10. strapping tape; 11. a secondary grouting pipe; 12. a galvanized joint; 13. and (5) clamping the clamp.
Detailed Description
The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the utility model, fall within the scope of protection of the utility model.
In the description of the present utility model, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. refer to the orientation or positional relationship based on that shown in the drawings, merely for convenience of description of the present utility model and do not require that the present utility model must be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. The terms "coupled" and "connected" as used herein are to be construed broadly and may be, for example, fixedly coupled or detachably coupled; either directly or indirectly through intermediate components, the specific meaning of the terms being understood by those of ordinary skill in the art as the case may be.
The utility model will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
As shown in fig. 1-2, a mining middle and deep drilling prevention type two-blocking one-injection hole sealing device comprises a bag 1, a sampling tube 2, grouting tubes 5 and a secondary grouting tube 11, wherein two bags 1 are arranged in the drilled holes at intervals, the two bags 1 are correspondingly connected with the grouting tubes 5, the drilled holes are plugged by filling the bags 1 with the grouting tubes, specifically, the two bags 1 are connected together through the sampling tube 2, one bag 1 at the near end is positioned at the inlet of the drilled hole, the other bag 1 at the far end, the bag 1 at the far end is close to the bottom of the drilled hole, the sampling tube 2 penetrates through the two bags 1 along the axial direction of the drilled hole, the bag 1 is made of elastic materials, such as rubber materials, the inner cavity of the bag 1 and the sampling tube 2 are mutually independent, the far end of the sampling tube 2 is provided with a plurality of extraction holes 4, on the basis of plugging the drilled hole, the coal seam gas corresponding to the drilled hole deep mining depth can be extracted through a connecting pump at the near end of the sampling tube 2, and then the gas content and the gas pressure in the coal seam are reduced, and the working face is convenient.
The proximal end of the grouting pipe 5 is connected to the pressure pump 9, the distal end is correspondingly connected with the two bags 1 in series, the pressure pump 9 is used for grouting to the two bags 1 through the grouting pipe 5, the distal end penetrates through the bags 1 at the proximal end side and then extends between the two bags 1, the diameters of the grouting pipe 5 and the secondary grouting pipe 11 are the same, the distance A between the inner ports of the grouting pipe 5 and the secondary grouting pipe 11 is 15-20 cm, the proximal end of the secondary grouting pipe 11 is provided with a quick connector 8, the quick connector is conveniently connected with the pressure pump 9 through a PE pneumatic connector, the pressure pump 9 is flexibly connected between the secondary grouting pipe 11 and the grouting pipe 5 through the PE pneumatic connector according to the drilling plugging progress, specifically, a grouting pipeline of the grouting pressure pump 9 is connected with the outer end connector of the grouting pipe 5 or the preventive secondary grouting pipe 11, secondary grouting is performed through the secondary grouting pipe 11 after grouting of the bags 1 is completed, gaps between the two bags 1 are plugged, and hole sealing is completed.
Furthermore, in order to observe the grouting condition of the grouting liquid, a pressure release valve is arranged on the grouting pipe 5, the pressure release valve is opened under a certain pressure, the internal pressure of the bag 1 is proper by setting the opening pressure of the pressure release valve (which can be equal to the preset pressure of the bag 1), the bag 1 is not broken under the premise of ensuring sealing, the pressure is not too large, the grouting pipe 5 and the secondary grouting pipe 11 are opened when the specified pressure is reached in the grouting pipe 5, a passage is formed between the grouting pipe 5 and the secondary grouting pipe 11, and after the pressure release valve is opened, the grouting liquid flows out from the secondary grouting pipe 11, so that whether the grouting of the bag 1 is completed can be intuitively judged.
In this embodiment, the inner wall and the outer wall of the bag 1 are provided with anti-slip protruding strips to ensure that the bag 1 will not be displaced due to gas extraction after rising.
In an alternative embodiment, the grouting pipe 5 and the secondary grouting pipe 11 are provided with clamping hoops 13 corresponding to the bags 1 so as to seal the bags 1, and the bags 1 are provided with perforations corresponding to the grouting pipe 5 and the secondary grouting pipe 11 respectively.
Taking the grouting pipe 5 as an example, the bag 1 is of a sleeved structure, a group of corresponding perforations are formed in the part, close to the end part, of the bag 1, the grouting pipe 5 passes through the corresponding two perforations from the near to the far, the clamp 13 is correspondingly clamped on the grouting pipe 5 for sealing, the corresponding perforation on each grouting pipe 5 is provided with the two clamp 13, the two clamp 13 extrudes two sides of the bag 1, sealing is achieved, and a sealing gasket is further arranged between the clamp 13 and the bag 1.
Preferably, the clamp 13 can be replaced by a screw cap, and threads are arranged on the outer wall of the grouting pipe 5, so that the sealing is realized by correspondingly extruding the bag 1 and the sealing gasket by rotating the screw cap.
In an alternative embodiment, a reverse flow valve 6 is provided in the middle of the grouting pipe 5, and the reverse flow valve 6 is located at the proximal end of the grouting pipe 5 corresponding to the pressure release valve. The overflow valve is located between the two bags 1 to avoid the back flow of slurry when grouting is performed through the secondary grouting pipe 11.
In an alternative embodiment, the relief valve is a bursting bead, a corresponding liquid outlet is specifically arranged on the grouting pipe 5, a branch pipe corresponding to the liquid outlet is arranged on the outer wall of the grouting pipe 5, the branch pipe extends to the direction of the secondary grouting pipe 11 along the radial direction of the grouting pipe 5, a blocking cover is arranged at the end part of the branch pipe, a round hole is arranged on the blocking cover, the bursting bead is correspondingly arranged in the branch pipe, the bursting bead seals the round hole to seal the liquid outlet, and the bursting bead is responded to be pressed so as to open the liquid outlet, so that slurry in the grouting pipe 5 can flow out.
The bursting beads are balloons, water can be injected into the bursting beads, the diameter of the balloons after water injection is larger than the inner diameter of the branch pipe, and the bearing capacity of the balloons is equal to the pressure intensity in the preset bag 1.
Under ideal conditions, after two bags 1 are fully inflated, the blasting beads are exploded, and slurry flows into the plugging area along with the blasting beads, but in the actual plugging process, the situation that the blasting beads cannot be exploded to cause the slurry to be unable to be injected exists, and once the situation is heavy, the drilling is scrapped, and the bag 1 needs to be replaced to restart hole sealing if light, so that economic loss is caused, and the construction efficiency and speed are affected.
In this embodiment, for ease of installation, the cover is in the shape of a cap, which is connected to the end of the branch pipe by means of a threaded connection.
In an alternative embodiment, the distal end of the sampling tube 2 is provided with a conical choke plug 3, the larger end of the conical choke plug 3 is correspondingly connected with the sampling tube 2, and the diameter of the larger end of the conical choke plug 3 is larger than that of the sampling tube 2. In the process of inserting the drill hole, the conical choke plug 3 can conduct guiding and shield broken stone on the inner wall of the drill hole, and the broken stone is prevented from blocking the extraction hole 4.
In this embodiment, the distal end of the secondary grouting pipe 11 is also provided with a tapered choke plug 3, and the side wall of the secondary grouting pipe 11 adjacent to the tapered choke plug 3 is provided with a grout outlet.
In an alternative embodiment, two ends of the bag 1 are fixed on the outer wall of the sampling tube 2 through strapping 10, and the bag 1 can be fixed on the outer wall of the sampling tube 2 through hoops to realize fixation and sealing of the bag 1.
In another alternative embodiment, the device can also measure the pressure of the coal-bed gas, and the diameter of the sampling tube 2 can be smaller than that of the sampling tube 2 when the coal-bed gas is extracted when the pressure is measured.
In order to meet the pressure measurement or extraction requirements, the collecting and measuring pipe 2 comprises galvanized pipes formed by splicing multiple sections, and the multiple sections of galvanized pipes are connected through galvanized joints 12.
When the pressure measurement is carried out, the near end of the sampling tube 2 is correspondingly connected with a pressure gauge 7 so as to measure the gas pressure of the coal seam in the drill hole.
Of course, this device also can carry out coal seam gas pressure survey and coal seam gas extraction, specifically is after the extraction, detains hole sealing device in the drilling, then adopts the near-end installation manometer 7 of survey pipe 2, can realize gas pressure monitoring, avoids producing new gas in the exploitation process.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the appended claims.
Claims (6)
1. Two stifled one zhi feng devices of mining well drilling prevention, characterized in that includes:
the two sachets are distributed in the drill holes at intervals;
the sampling tube axially penetrates through the two bags along the drilling hole, and a plurality of extraction holes are formed in the distal end of the sampling tube;
the proximal end of the grouting pipe is connected to the pressure pump, and the distal end of the grouting pipe is correspondingly connected with the two bags in series;
the proximal end of the secondary grouting pipe is provided with a quick connector, and the distal end of the secondary grouting pipe penetrates through the bags at the proximal end side and then extends between the two bags;
a pressure release valve is arranged on the grouting pipe so as to be opened when the specified pressure in the grouting pipe is reached, so that a passage is formed between the grouting pipe and the secondary grouting pipe;
the middle part of the grouting pipe is provided with a countercurrent valve which is positioned at the near end of the grouting pipe corresponding to the pressure release valve;
the pressure release valve is a blasting bead, a corresponding liquid outlet is formed in the grouting pipe, a branch pipe corresponding to the liquid outlet is formed in the outer wall of the grouting pipe, the branch pipe extends to the direction of the secondary grouting pipe along the radial direction of the grouting pipe, a blocking cover is arranged at the end part of the branch pipe, a round hole is formed in the blocking cover, the blasting bead is correspondingly arranged in the branch pipe, the round hole is blocked by the blasting bead to seal the liquid outlet, and the liquid outlet is opened in response to the pressure rupture of the blasting bead;
the bursting beads are balloons, water is injected into the inner part of each bursting bead, the diameter of each bursting bead after water injection is larger than the inner diameter of each branch pipe, and the bearing capacity of each bursting bead is equal to the pressure intensity in the preset sac;
the baffle cover is in a cover shape and is connected to the end part of the branch pipe in a threaded connection mode.
2. The mining medium-deep drilling preventive two-plug one-injection hole sealing device according to claim 1, wherein clamps corresponding to the bags are arranged on the grouting pipe and the secondary grouting pipe so as to seal the bags.
3. The mining middle-deep drilling preventive two-plug one-injection hole sealing device according to claim 1, wherein a conical choke plug is arranged at the far end of the mining and measuring pipe, the larger end of the conical choke plug is correspondingly connected with the mining and measuring pipe, and the diameter of the larger end of the conical choke plug is larger than that of the mining and measuring pipe.
4. The mining middle and deep drilling preventive two-plugging one-hole injection sealing device according to claim 1, wherein two ends of the bag are fixed on the outer wall of the mining pipe through strapping.
5. The mining middle and deep drilling preventive two-plug one-hole sealing device according to claim 1, wherein the mining pipe comprises galvanized pipes formed by splicing multiple sections, and multiple sections of galvanized pipes are connected through galvanized joints.
6. The mining middle and deep drilling prevention type two-plug one-injection hole sealing device according to claim 1, wherein the near end of the mining and measuring pipe is correspondingly connected with a pressure gauge so as to measure the gas pressure of the coal bed in the drilling hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322300079.7U CN220726243U (en) | 2023-08-25 | 2023-08-25 | Mining well deep drilling preventive two stifled one notes seal hole device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322300079.7U CN220726243U (en) | 2023-08-25 | 2023-08-25 | Mining well deep drilling preventive two stifled one notes seal hole device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220726243U true CN220726243U (en) | 2024-04-05 |
Family
ID=90496918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322300079.7U Active CN220726243U (en) | 2023-08-25 | 2023-08-25 | Mining well deep drilling preventive two stifled one notes seal hole device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220726243U (en) |
-
2023
- 2023-08-25 CN CN202322300079.7U patent/CN220726243U/en active Active
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