CN215109009U - Drilling system for realizing continuous gas extraction in working face extraction process - Google Patents
Drilling system for realizing continuous gas extraction in working face extraction process Download PDFInfo
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- CN215109009U CN215109009U CN202121112182.3U CN202121112182U CN215109009U CN 215109009 U CN215109009 U CN 215109009U CN 202121112182 U CN202121112182 U CN 202121112182U CN 215109009 U CN215109009 U CN 215109009U
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Abstract
The utility model relates to the technical field of coal mining, and provides a drilling system for realizing the continuous gas extraction in the stoping process of a working face, which comprises a lane side high-level drilling group and a roof high-level drilling which are formed along the trend of the working face; the lane upper drilling group comprises a plurality of lane upper drilling holes, the opening points of the lane upper drilling holes are positioned at the drilling sites on the air return lane walls, and the final hole points are positioned at different height positions of the goaf fracture zone area above the coal seam; and the hole opening point of the top plate high-position drilling hole is positioned at the top plate of the roadway, and the final hole point is positioned in a goaf fracture zone area above the coal seam. The utility model discloses arranging of high-order drilling is through taking "pressing the stubble to arrange the mode of" combining "tunnel roof cloth hole", and the high-order drilling final hole is located the different levels in collecting space area top crack area, can realize taking out to the all-round detection of collecting space area gas and take out, guarantees that high-order drilling can take out the regional high concentration gas of gas enrichment in succession, realizes the accurate improvement of working face gas.
Description
Technical Field
The utility model relates to a coal mining technical field especially relates to a drilling system who realizes that working face stoping process gas takes out in succession and takes out.
Background
Mine disasters, particularly gas dynamic disasters, are the most serious. The gas treatment method comprises gas drainage, coal seam water injection, exploitation of a liberation layer, construction of high-position drilling and the like. The high-position drilling is mainly used for extracting gas in a goaf during normal stoping of a working face, and is a gas treatment method with high gas extraction and drainage efficiency.
The existing technology for extracting gas in a goaf by high-position drilling needs to determine a proper final hole position. If the arrangement position of the final hole of the high-position drill hole is not proper, the crack is not developed fully, the permeability is low, the gas extraction concentration and flow are low, and the purpose of gas treatment cannot be achieved.
In addition, in the working face recovery process, the constructed high-position drill hole is influenced by the working face recovery, the drill hole on the roadway side fails, the problems of discontinuous extraction and the like can occur, and the extraction efficiency is seriously influenced.
Therefore, at present, the positions of the open hole and the final hole of a high-position drill hole in the prior art need to be improved, so that a drilling system capable of realizing continuous gas extraction in the working face extraction process is obtained, the gas extraction amount and the gas extraction concentration are improved through the system, the gas emission in a goaf is reduced, the fire accident in the goaf is avoided, and the mine gas disaster control is realized.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a drilling system that realizes that working face stoping process gas takes out in succession is provided, can realize taking out to the all-round detection of collecting space area gas based on this system, realize that the working face stoping process takes out in succession incessant, and then improves gas and takes out efficiency and take out concentration.
The utility model discloses a following technical scheme solves above-mentioned technical problem:
a drilling system for realizing continuous gas extraction in the working face extraction process comprises a lane side high-level drilling group and a top plate high-level drilling hole which are formed along the working face direction; the lane upper drilling group comprises a plurality of lane upper drilling holes, the opening points of the lane upper drilling holes are positioned at the drilling sites on the air return lane walls, and the final hole points are positioned at different height positions of the goaf fracture zone area above the coal seam; and the hole opening point of the top plate high-position drilling hole is positioned at the top plate of the roadway, and the final hole point is positioned in a goaf fracture zone area above the coal seam.
As one of the preferred modes of the utility model, a plurality of drill sites have been seted up along the working face direction to the return air tunnel group side, interval 20m between the adjacent drill site.
As one of the preferable modes of the utility model, three high-position drilling and tapping points of the lane sides are respectively arranged on each drilling site; the three lane-side high-position drilling tapping points are arranged in groups, and meanwhile, the position interval between every two adjacent tapping points is 1.0 m.
As one of the preferred modes of the utility model, on the return air tunnel group, every interval 20m arranges a set of high-order drilling trompil point of tunnel group.
As one of the preferable modes of the utility model, the three hole-opening points of the high-position drilling of the roadway side are specifically positioned on the return air roadway side and at a position 0.5m away from the roadway top plate; the three lane high-position drilling final hole points are specifically positioned in goaf fracture zone areas above the coal seam and are respectively 20m, 30m and 40m away from the coal seam.
As one of the preferred modes of the utility model, every the tunnel roof position of drill site top is provided with one respectively the high-order drilling of roof.
As one of the preferable modes of the utility model, the hole-opening point of the top plate high-position drilling is positioned on the corresponding tunnel top plate and is 1.0m away from the air return tunnel side; and the final hole point of the top plate high-level drilling hole is positioned in a goaf fracture zone area above the coal seam and is 40m away from the coal seam.
As one of the preferable modes of the present invention, the bore diameter of the high-position drill hole of the lane side and the high-position drill hole of the top plate is 94 mm.
As one of the preferable modes of the present invention, sleeves are respectively disposed inside the lane high-position drill hole and the roof high-position drill hole; the sleeve is matched with the gas drainage pipe and used for gas drainage; meanwhile, the hole openings of the roadway side high-level drill hole and the top plate high-level drill hole are respectively connected with a gas concentration online monitoring device and used for monitoring and displaying the gas concentration of each drill hole.
In a preferred embodiment of the present invention, the diameter of the gas drainage pipe is 72 mm.
The utility model discloses compare prior art's advantage and lie in: the arrangement of the high-position drilling holes of the utility model adopts the mode of combining the stubble pressing arrangement with the hole arrangement of the roadway roof, and the final holes of the high-position drilling holes are positioned at different layers of a fracture zone above a goaf, so that the gas in the goaf can be comprehensively detected and extracted, the high-position drilling holes can be ensured to continuously extract the high-concentration gas in a gas enrichment area, and the gas on the working face can be accurately treated; the method comprises the following specific steps:
(1) in the utility model, when the first group of lane upper high-level drill holes arranged on the return air lane upper are influenced by the extraction of the working face, and the upper drill holes and the extraction pipeline are damaged and can not realize continuous extraction, the final holes of the second group of lane upper high-level drill holes at a distance of 20m are positioned in a fractured zone gas enrichment area, continuous extraction is realized through the second group of lane upper high-level drill holes, and the concentration of the gas in the extraction pipeline is ensured to be always at a high concentration level; when the second group of roadway side high-position drill holes are damaged, the third group of roadway side high-position drill holes are continuously extracted, and by analogy, all gas extraction drill hole pipelines are connected to a gas extraction main pipe to realize extraction;
(2) in the utility model, the final holes of the high-level drill holes of each group of roadway sides on the return air roadway sides are positioned at different layers of the fracture zone above the goaf, so that the gas in the goaf can be comprehensively detected and extracted, and the high-level drill holes can be ensured to continuously extract the high-concentration gas in the gas enrichment area;
(3) in the utility model, a top plate high-position drill hole is arranged at the top roadway top plate above the high-position drill hole of each roadway side; after the working face is pushed to pass through a drill site, after the high-position drill hole of the roadway side on the air return roadway side fails, the high-position drill hole of the top plate of the roadway top plate can still continuously extract gas of the fracture zone of the goaf, and continuous extraction is realized.
Drawings
FIG. 1 is a schematic view of the arrangement of the vertical face of the drilling system in embodiment 1;
FIG. 2 is a schematic elevation view of the first set of elevated boreholes of FIG. 1;
fig. 3 is a positional relationship diagram of the positions of the high-position drilling holes of the same group of the air return roadway sides in the embodiment 1.
In the figure: 1 is a working face, 2 is a roadway side high-position drilling group, 21 is a roadway side high-position drilling hole, 211 is a 1# drilling hole, 212 is a 2# drilling hole, 213 is a 3# drilling hole, 3 is a top plate high-position drilling hole, 31 is a 4# drilling hole, 4 is an air return roadway side, 41 is a drilling site, 5 is a roadway top plate, and 6 is a goaf fracture zone area.
Detailed Description
The embodiments of the present invention will be described in detail below, and the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1
As shown in fig. 1 to 3, the drilling system for realizing continuous gas extraction in the working face extraction process of the embodiment includes four groups of high-position drilling groups 2 for lane walls and four high-position drilling holes 3 for roof plates, which are formed along the direction of the working face 1. Each lane high-position drilling group 2 comprises three lane high-position drilling holes 21, the opening points of the three lane high-position drilling holes 21 are located on a drilling field 41 on the return air lane side 4, and the final hole points are located at different height positions of a goaf fracture zone area 6 above a coal seam. The hole opening point of each top plate high-level drill hole 3 is located at a roadway top plate 5, and the final hole point is located in a goaf fracture zone area 6 above a coal seam.
Further, referring to fig. 1, in the present embodiment, four drill sites 41 are disposed on the air return side wall 4 along the working surface 1, and the interval between adjacent drill sites 41 is 20 m; wherein, the drilling sites 41 are provided with a group of drilling points of the roadway side high-position drilling group 2, and the corresponding roadway roof 5 above each drilling site 41 is provided with a drilling point of the roof high-position drilling 3. Specifically, on the air return roadway side 4, a group of roadway side high-position drilling 21 hole opening points are arranged at intervals of 20 m; correspondingly, on the roadway roof 5, the hole opening points of the roof high-position drill holes 3 are arranged at intervals of 20 m.
Further, referring to fig. 3, in the present embodiment, the opening points 21 of the three highwall drill holes 21 in the same group are arranged in a group, and meanwhile, the distance between two adjacent opening points is 1.0 m.
Further, referring to fig. 1 and fig. 2, in the present embodiment, the opening points of the three high-level drill holes 21 of the same group are specifically located on the air return side 4 and at a height of 0.5m from the top plate 5 of the roadway, and the final hole points are located in the goaf fractured zone area 6 above the coal seam and at a height of 20m, 30m, and 40m from the coal seam, respectively.
Correspondingly, the hole opening point of the top plate high-level drill hole 3 is specifically located on the corresponding roadway top plate 5 and 1.0m away from the position of the return air roadway side 4, and the final hole point is located in the goaf fracture zone area 6 above the coal seam and 40m away from the coal seam.
Further, in this embodiment, sleeves are respectively disposed inside the roadway high-level drill hole 21 and the roof high-level drill hole 3; the sleeve is matched with the gas drainage pipe and used for gas drainage. Meanwhile, the orifices of each lane high-level drill hole 21 and the top plate high-level drill hole 3 are also respectively connected with a gas concentration online monitoring device for monitoring and displaying the gas concentration of each drill hole.
Further, in the present embodiment, the bore diameter of the highwall bore 21 and the highwall bore 3 is 94mm, and the diameter of the gas drainage pipe is 72 mm.
In addition, in this embodiment, it should be noted that, regarding the structural position relationship of the working surface 1, the air return side wall 4, the roof 5 and the goaf fractured zone 6, that is, "the working surface 1 of the coal seam is located in the air return side wall 4, the roof 5 has a neighboring rock formation on the air return side wall 4, and the goaf fractured zone 6 is a zone on the roof 5", which are well known in the art, and therefore, it is not described herein again.
The gas extraction method based on the drilling system comprises the following steps:
(1) as shown in fig. 2, a first group of three high level holes 21 are formed in the return air wall 4 and are named as a # 1 hole 211, a # 2 hole 212 and a # 3 hole 213; the hole opening points of the No. 1 drill hole 211, the No. 2 drill hole 212 and the No. 3 drill hole 213 are located on the air return roadway side 4 and are 0.5m away from the roadway top plate 5, the final hole point of the No. 1 drill hole 211 is located in the goaf fractured zone area 6 above the coal seam and is 20m away from the coal seam, the final hole point of the No. 2 drill hole 212 is located in the goaf fractured zone area 6 above the coal seam and is 30m away from the coal seam, and the final hole point of the No. 3 drill hole 213 is located in the goaf fractured zone area 6 above the coal seam and is 40m away from the coal seam.
(2) As shown in fig. 2, a first roof high-level borehole 3, named 4# borehole 31, is implemented at the roadway roof 5 above the 1# borehole 211, the 2# borehole 212, and the 3# borehole 213; the hole opening point of the No. 4 drill hole 31 is located on the roadway top plate 5 and 1.0m away from the position of the air return roadway side 4, and the final hole point is located in the goaf crack belt area 6 above the coal seam and 40m away from the coal seam in vertical height.
(3) Respectively installing a casing pipe and a gas drainage pipe in the drill holes of the No. 1 drill hole 211, the No. 2 drill hole 212, the No. 3 drill hole 213 and the No. 4 drill hole 31 for extracting gas; meanwhile, four drilling orifices are connected with the gas concentration on-line monitoring device for judging the gas concentration of each drilling.
(4) Referring to the flows of the step (1), the step (2) and the step (3), as shown in fig. 1, high-level drilling of a second group, a third group and a fourth group of roadway sides is carried out on an air return roadway side 4, high-level drilling of a second group, a third group and a fourth group is carried out on a corresponding roadway roof 5, and a steel bushing and a gas drainage pipe are installed in each drilling and connected with an online gas concentration monitoring device; wherein, the drilling of each group is carried out in turn by adopting a stubble pressing arrangement mode.
(5) Starting working face extraction work, and continuously extracting gas; in the recovery process, the working face 1 is pushed forward along with the recovery work; when passing through one drill site 41, the three highwall boreholes 21 of the drill site 41 fail; at this time, the three high-position roadway side drill holes 21 of the next drill site 41 are connected to perform extraction until all the stoping of the coal face is finished, and continuous extraction is realized.
When the construction of the roadway side high-level drill hole 21 and the roof high-level drill hole 3 is completed, sealing holes by using a cement slurry material; and after hole sealing, lowering the casing and the gas drainage pipeline, and connecting the casing and the gas drainage pipeline to perform gas drainage.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A drilling system for realizing continuous gas extraction in a working face extraction process is characterized by comprising a lane side high-position drilling group and a top plate high-position drilling hole which are formed along the direction of a working face; the lane upper drilling group comprises a plurality of lane upper drilling holes, the opening points of the lane upper drilling holes are positioned at the drilling sites on the air return lane walls, and the final hole points are positioned at different height positions of the goaf fracture zone area above the coal seam; and the hole opening point of the top plate high-position drilling hole is positioned at the top plate of the roadway, and the final hole point is positioned in a goaf fracture zone area above the coal seam.
2. The drilling system for realizing continuous gas extraction in the working face extraction process according to claim 1, wherein a plurality of drilling sites are arranged on the return air roadway side along the working face direction, and the interval between every two adjacent drilling sites is 20 m.
3. The drilling system for realizing continuous gas extraction in the stoping process of the working face according to claim 2, wherein three lane-side high-position drilling and tapping points are respectively arranged on each drilling site; the three lane-side high-position drilling tapping points are arranged in groups, and meanwhile, the position interval between every two adjacent tapping points is 1.0 m.
4. The drilling system for realizing continuous gas extraction in the working face extraction process according to claim 3, wherein a group of high-position drilling and hole-opening points of the roadway side are arranged on the return air roadway side at intervals of 20 m.
5. The drilling system for realizing continuous gas extraction in the working face extraction process according to claim 3, wherein the three high-level drilling points of the roadway sides are specifically positioned on the return air roadway sides and at a height of 0.5m from the roadway top plate; the three lane high-position drilling final hole points are specifically positioned in goaf fracture zone areas above the coal seam and are respectively 20m, 30m and 40m away from the coal seam.
6. The drilling system for realizing continuous gas extraction in the stoping process of the working face according to claim 2, wherein one top plate high-level drill hole is arranged at the position of the top plate of the roadway above each drill site.
7. The drilling system for realizing continuous gas extraction in the working face extraction process according to claim 6, wherein the hole opening point of the top plate high-level drilling hole is located on the corresponding roadway top plate and is 1.0m away from the return air roadway side; and the final hole point of the top plate high-level drilling hole is positioned in a goaf fracture zone area above the coal seam and is 40m away from the coal seam.
8. The drilling system for realizing continuous gas extraction in the stoping process of the working face according to claim 1, wherein the bore diameter of the high-position drill hole of the roadway side and the high-position drill hole of the top plate is 94 mm.
9. The drilling system for realizing continuous gas extraction in the working face extraction process according to any one of claims 1 to 8, wherein sleeves are respectively arranged inside the roadway side high-level drill hole and the top plate high-level drill hole; the sleeve is matched with the gas drainage pipe and used for gas drainage; meanwhile, the hole openings of the roadway side high-level drill hole and the top plate high-level drill hole are respectively connected with a gas concentration online monitoring device and used for monitoring and displaying the gas concentration of each drill hole.
10. The drilling system for realizing continuous gas extraction in the stoping process of the working face as claimed in claim 9, wherein the diameter of the gas drainage pipe is 72 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202121112182.3U CN215109009U (en) | 2021-05-21 | 2021-05-21 | Drilling system for realizing continuous gas extraction in working face extraction process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121112182.3U CN215109009U (en) | 2021-05-21 | 2021-05-21 | Drilling system for realizing continuous gas extraction in working face extraction process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022242056A1 (en) * | 2021-05-21 | 2022-11-24 | 安徽理工大学 | Method for implementing continuous extraction of gas by high-position drilling in working face stoping process |
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- 2021-05-21 CN CN202121112182.3U patent/CN215109009U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022242056A1 (en) * | 2021-05-21 | 2022-11-24 | 安徽理工大学 | Method for implementing continuous extraction of gas by high-position drilling in working face stoping process |
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Granted publication date: 20211210 |