CN206246061U - Deep level, high-ground stress exposed coal drilling construction device - Google Patents
Deep level, high-ground stress exposed coal drilling construction device Download PDFInfo
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- CN206246061U CN206246061U CN201621296861.XU CN201621296861U CN206246061U CN 206246061 U CN206246061 U CN 206246061U CN 201621296861 U CN201621296861 U CN 201621296861U CN 206246061 U CN206246061 U CN 206246061U
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- drill bit
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- ground stress
- hole
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Abstract
The utility model belongs to Safety of Coal Mine Production technical field of construction, specifically related to a kind of deep level, high-ground stress exposed coal drilling construction device, including drill bit, the bit central has a through hole, and the chisel edge is provided with the dodge gate that can make through hole front end aperture closure or openness；The drill bit rear end is connected by hollow drill with rig, and the centre bore of the drilling rod is connected with the through hole of drill bit, the passage that composition is passed through for sleeve pipe.The utility model using whole sleeve pipe guard aperture technique, before drilling rod extraction, just by sleeve pipe decentralization in place, collapse caused by crushing rock formation is prevented well, substantially increases the efficiency of construction and pump drainage effect of pump drainage drilling by drilling.
Description
Technical field
The utility model belongs to Safety of Coal Mine Production technical field of construction, and in particular to a kind of deep level, high-ground stress are taken off
Coal borer hole constructing device.
Background technology
The construction of exposed coal drilling is mainly used in the pre- coal-bed gas taken out in exposed coal region, makes the coal seam in the exposed coal work of tunnel
Outburst dangerous level is preferably minimized.Gas Outburst is important during being prevention exposed coal for the coal bed gas extraction in exposed coal region
Work, the quality of drilling construction quality directly influences exposed coal extracting result.During drilling construction, early-stage preparations are not enough；
In work progress, the new problem to running into can not be successfully managed, and whole drilling construction can all can not ensure in quality, in work
Phase causes to delay.During deep level, high-ground stress exposed coal drilling construction is carried out, because rock pressure is larger, it is easily broken,
When being drilled using general technology, drill bit is easy to collapse once hole wall is extracted out, leads to not normal down tube, sometimes often anti-
Carrying out repeatedly drilling again smoothly could transfer in place sleeve pipe, have a strong impact on production and construction efficiency.
Utility model content
The purpose of this utility model is to provide deep level, the high-ground stress that a kind of borehole wall when being prevented from down tube collapses
Exposed coal drilling construction device.
To achieve the above object, the utility model provides following technical scheme：
A kind of deep level, high-ground stress exposed coal drilling construction device, including drill bit, the bit central have a through hole,
The chisel edge is provided with the dodge gate that can make through hole front end aperture closure or openness；The drill bit rear end passes through hollow drill
It is connected with rig, the centre bore of the drilling rod is connected with the through hole of drill bit, the passage that composition is passed through for sleeve pipe.
Preferably, along the circumferential direction uniform intervals are provided with multiple brill teeth to chisel edge；One end of the dodge gate and brill
The annular end face of head is hinged, and the front end of the dodge gate also is provided with boring tooth.
Preferably, the dodge gate is rod-like structure, and the annular end face of chisel edge is provided with two symmetrical grooves, living
The two ends of dynamic door are respectively placed in two grooves, and wherein one end of dodge gate is side walls hinged with groove, the other end and groove side
Positioning hoodle is provided between wall.
Preferably, the outer ring surface of the drilling rod is provided with helical ridge.
Preferably, multiple water injection holes are along the circumferential direction offered on the annular sidewall of the drill bit.
It is of the present utility model to have technical effect that：The utility model utilizes whole sleeve pipe guard aperture technique, before drilling rod extraction,
Just by sleeve pipe decentralization in place, drilling is collapsed caused by crushing rock formation is prevented well, substantially increases the construction of pump drainage drilling
Efficiency and pump drainage effect.
Brief description of the drawings
Fig. 1 is the exposed coal hole structure sectional view that embodiment of the present utility model is provided；
Fig. 2 is the drill bit drilling state stereogram that embodiment of the present utility model is provided；
Fig. 3 is the drill bit down tube state stereogram that embodiment of the present utility model is provided.
Specific embodiment
The utility model is described in detail below in conjunction with accompanying drawing.
Embodiment 1
As Figure 1-3, a kind of deep level, high-ground stress exposed coal drilling construction device, including drill bit 10, the drill bit 10
Center has a through hole, and the front end of the drill bit 10 is provided with the dodge gate 12 that can make through hole front end aperture closure or openness；It is described
The rear end of drill bit 10 is connected by hollow drill 11 with rig, and the centre bore of the drilling rod 11 is connected with the through hole of drill bit 10, is constituted
For the passage that sleeve pipe 2 is passed through.
Preferably, along the circumferential direction uniform intervals are provided with and multiple bore teeth the front end of drill bit 10；One end of the dodge gate 12
Annular end face with drill bit 10 is hinged, and the front end of the dodge gate 12 also is provided with boring tooth 121.
Preferably, the dodge gate 12 is rod-like structure, the annular end face of the front end of drill bit 10 be provided with two it is symmetrical recessed
Groove, the two ends of dodge gate 12 are respectively placed in two grooves, and wherein one end of dodge gate 12 is side walls hinged with groove, the other end
Positioning hoodle 122 is provided between recess sidewall.
Preferably, the outer ring surface of the drilling rod 11 is provided with helical ridge 111.
Preferably, multiple water injection holes 101 are along the circumferential direction offered on the annular sidewall of the drill bit 10.
Embodiment 2
As shown in figure 1, a kind of deep level, high-ground stress exposed coal drilling construction method, are bored using the constructing device
Hole is constructed, including：
Water supply, air feed, draining, exhaust pipeline are laid in tunnel or pit shaft；
Drill bit 10 is fixedly connected with drilling rod 11, and drilling rod 11 and drill spindle are fixed；
Start rig, drilling is started along predetermined direction, drill bit 10 persistently feeds, until penetrating whole coal seam and extending forward
One segment distance, drilling hole depth crosses 10~15 meters of coal seam, preferably 12 meters of the present embodiment.
Sleeve pipe 2 penetrates the centre bore of drilling rod 11, the top of dodge gate 12 on drill bit 10 is opened in the front end of sleeve pipe 2, and from drill bit
10 front ends pass；After the front end of sleeve pipe 2 reaches bottom hole, retaining sleeve 2 is motionless, by drilling rod 11 together with 10 1 pieces of extractions of drill bit, makes set
Pipe 2 is stayed in drilling and carries out supporting to hole wall；
Drainage tube is set at drilling orifice, and drainage tube is enclosed within outside sleeve pipe 2, and drainage tube upper end connects with aspiration pump, takes out
Adopt and upper and lower two elastic sealing of hole capsules are set between the outer wall of pipe and the hole wall of drilling, and to two elastic sealing of hole capsules and two bullets
Property sealing of hole capsule between space using grout pouring fill.
Preferably, after drilling terminates, before the decentralization of sleeve pipe 2, being breathed freely according to coal seam, degree is selective to be carried out to coal seam
Hydraulic fracturing anti-reflection, specific method is：By the centre bore of drilling rod 11 and high service pipeline connection, lasting note is carried out to coal seam
Water, until reaching predetermined pressure, and carries out draining after the time of pressurize one end；The drainage procedure is：High pressure is inserted into drilling
Airduct, is discharged the ponding in drilling using blast.The water injection pressure is 15~20MPa, the preferred 17MPa of the present embodiment.
The utility model before the extraction of drilling rod 11, is just transferred in place sleeve pipe 2, very well using whole sleeve pipe guard aperture technique
The drilling caused by crushing rock formation that prevents collapse, substantially increase the efficiency of construction and pump drainage effect of pump drainage drilling.
Preferred embodiment of the present utility model is the foregoing is only, is not used to limit the utility model, it is all at this
Any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (5)
1. a kind of deep level, high-ground stress exposed coal drilling construction device, it is characterised in that：Including drill bit, the bit central tool
There is a through hole, the chisel edge is provided with the dodge gate that can make through hole front end aperture closure or openness；The drill bit rear end leads to
Cross hollow drill to be connected with rig, the centre bore of the drilling rod is connected with the through hole of drill bit, the passage that composition is passed through for sleeve pipe.
2. deep level according to claim 1, high-ground stress exposed coal drilling construction device, it is characterised in that：Chisel edge
Along the circumferential direction uniform intervals are provided with multiple brill teeth；One end of the dodge gate is hinged with the annular end face of drill bit, the work
The front end of dynamic door also is provided with boring tooth.
3. deep level according to claim 2, high-ground stress exposed coal drilling construction device, it is characterised in that：The activity
Door is rod-like structure, and the annular end face of chisel edge is provided with two symmetrical grooves, and the two ends of dodge gate are respectively placed in two
In groove, wherein one end of dodge gate is side walls hinged with groove, and positioning hoodle is provided between the other end and recess sidewall.
4. deep level according to claim 1, high-ground stress exposed coal drilling construction device, it is characterised in that：The drilling rod
Outer ring surface be provided with helical ridge.
5. deep level according to claim 1, high-ground stress exposed coal drilling construction device, it is characterised in that：The drill bit
Annular sidewall on along the circumferential direction offer multiple water injection holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621296861.XU CN206246061U (en) | 2016-11-30 | 2016-11-30 | Deep level, high-ground stress exposed coal drilling construction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621296861.XU CN206246061U (en) | 2016-11-30 | 2016-11-30 | Deep level, high-ground stress exposed coal drilling construction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206246061U true CN206246061U (en) | 2017-06-13 |
Family
ID=59002605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621296861.XU Active CN206246061U (en) | 2016-11-30 | 2016-11-30 | Deep level, high-ground stress exposed coal drilling construction device |
Country Status (1)
| Country | Link |
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| CN (1) | CN206246061U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437522A (en) * | 2016-11-30 | 2017-02-22 | 淮南矿业(集团)有限责任公司 | Deep-level and high-ground-stress coal uncovering and drilling construction device and method |
| CN113236127A (en) * | 2021-05-13 | 2021-08-10 | 中煤科工集团西安研究院有限公司 | Construction device and method for hydraulic punching while drilling and sieve tube hole protection |
| CN113236127B (en) * | 2021-05-13 | 2024-04-12 | 中煤科工集团西安研究院有限公司 | Hydraulic punching while drilling and screen pipe hole protection construction device and method |
-
2016
- 2016-11-30 CN CN201621296861.XU patent/CN206246061U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437522A (en) * | 2016-11-30 | 2017-02-22 | 淮南矿业(集团)有限责任公司 | Deep-level and high-ground-stress coal uncovering and drilling construction device and method |
| CN113236127A (en) * | 2021-05-13 | 2021-08-10 | 中煤科工集团西安研究院有限公司 | Construction device and method for hydraulic punching while drilling and sieve tube hole protection |
| CN113236127B (en) * | 2021-05-13 | 2024-04-12 | 中煤科工集团西安研究院有限公司 | Hydraulic punching while drilling and screen pipe hole protection construction device and method |
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