CN107401417A - A kind of mine coal helps anchor recovering method - Google Patents
A kind of mine coal helps anchor recovering method Download PDFInfo
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- CN107401417A CN107401417A CN201710729490.2A CN201710729490A CN107401417A CN 107401417 A CN107401417 A CN 107401417A CN 201710729490 A CN201710729490 A CN 201710729490A CN 107401417 A CN107401417 A CN 107401417A
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- coal
- anchor
- hollow
- resin metallic
- anchor pole
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- 239000003245 coal Substances 0.000 title claims abstract description 169
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000011347 resin Substances 0.000 claims abstract description 97
- 229920005989 resin Polymers 0.000 claims abstract description 97
- 238000005553 drilling Methods 0.000 claims abstract description 73
- 238000004064 recycling Methods 0.000 claims abstract description 10
- 239000010432 diamond Substances 0.000 claims abstract description 8
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 7
- 238000005065 mining Methods 0.000 claims description 19
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 206010015866 Extravasation Diseases 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 4
- 230000036251 extravasation Effects 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 8
- 238000011084 recovery Methods 0.000 abstract description 6
- 239000000956 alloy Substances 0.000 abstract description 5
- 229910045601 alloy Inorganic materials 0.000 abstract description 5
- 238000000605 extraction Methods 0.000 description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 239000010931 gold Substances 0.000 description 3
- 229910052737 gold Inorganic materials 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 2
- 238000004873 anchoring Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of mine coal to help anchor recovering method, comprises the following steps：The coal such as anchor rod pallet board, nut, ladder beam and net of disassembly ＆ recycling coal side resin metallic anchor pole helps support unit successively first；Then produced coal using wet type coal side resin metallic anchor recovering drilling tool directly set and help resin metallic anchor pole.Hollow drill bit in the wet type coal side resin metallic anchor recovering drilling tool of the present invention welds 3 tooth diamond compacts, the cutting output that can solves common alloy sheet hollow drill bit is small, fltting speed slowly, break that cash effect is poor, is short of power and the problems such as more people's operations；Internal diameter, wall thickness, quantity and the length of hollow drilling rod, can solve the problems such as design of hollow drilling rod internal diameter is unreasonable, interference coal helps anchor pole, the directly disconnected coal side resin metallic anchor pole of set and multistage hollow drilling rod, so of the invention have the advantages that fast, the broken cash effect of safe operation, fltting speed is good, recovery utilization rate is high.
Description
Technical field
The invention belongs to the technology category of coal measure strata mine coal seam tunnel coal side supporting, and in particular to a kind of mine coal seam
Tunnel coal side resin metallic anchor recovering method.
Background technology
In coal measure strata mine coal seam tunnel coal helps supporting, conventional coal side anchor pole is glass fibre reinforced plastics rockbolts, recyclable gold
Belong to three kinds of anchor pole and resin metallic anchor pole etc..Wherein, held the shortcomings that glass fibre reinforced plastics rockbolts, Recoverable metal anchor rod for moment of torsion and pallet
Carry the predominantly resin metallic anchor pole that power is small, is used as coal side anchor pole.Resin metallic anchor pole helps supporting in fully-mechanized mining working coal
When, need to reclaim it in exploitation process, existing recovery method is mainly：
(1) coal-winning machine coal cutting is to termination, and when ore deposit pressure shows, manually directly extracts coal and help resin metallic anchor pole；Ore deposit pressure is not
When showing, coal side resin metallic anchor pole is directly cut, manually sorted out resin metallic anchor pole residuum in drag conveyor,
The potential safety hazard of such method operation is larger.
(2) coal side anchor pole is directly extracted using coal side anchor recovering method, to realize returning for coal side resin metallic anchor pole
Receive, such as：Patent (A of CN 104653205) discloses a kind of fully-mechanized mining working coal side resin metallic anchor recovering method, the party
Method is to help resin metallic anchor pole to be connected with coal hoisting ring one end, and the other end is connected with drawstring, the other end and coal-winning machine of drawstring
Telescopic oil cylinder connection, when coal mining machine cut is in the range of coal side resin metallic anchor pole 1m, telescopic oil cylinder drives drawstring will
Coal side resin metallic anchor pole in the range of this is directly extracted, and realizes that coal helps resin metallic anchor recovering；Patent (CN 203214078
U, 2184784 Y of U, CN of CN 202520340) etc. disclose a kind of roofbolt recovering device, using motor or hydraulic pump as
Power source, resin metallic anchor pole exposed parts are helped using clamp coal, coal side resin metallic anchor pole is directly extracted, realizes coal
Resin metallic anchor recovering is helped, is the shortcomings that such method：On the one hand, due to resin metallic anchor-holding force of anchor bolt and coal slope laneway ore deposit
The effect shown is pressed, the power directly extracted needed for coal side resin metallic anchor pole is larger；On the other hand, the coal side resin gold of extraction
Category anchor pole scrappage is higher, and yield strength is not up to standard, and recovery utilization rate is low.
(3) coal side anchor pole is directly extracted using coal side roofbolt recovering device, the retracting device is mainly by connector, hollow
Drilling rod and the first-class three parts composition of core drill, are divided into dry type coal side roofbolt recovering device and wet type coal side roofbolt recovering device two are big
Class, wherein：Patent (CN 103452572 A, CN 104929664 A, CN 103527230 A, CN 203175586 U, CN
202810879 201,125,671 2,886,051 2535540 Y of Y, CN of Y, CN of U, CN) etc. disclose a kind of dry type coal side anchor
Rod recovery device, its notable technical characteristic are the auger stems that hollow drilling rod is tubular structure, the auger stem evagination or embedded
Helix, to press wind to discharge conny by helix as power, so as to which coal side resin metallic anchor pole directly be extracted；But
《Safety regulations in coal mine in 2011》Middle clear stipulaties, are drilled in coal and rock beds, should take wet boring, and coal (rock) is dashed forward with gas
When firedamp taking-out discharging drilling is difficult to take wet boring in coal output layer or soft seam, dry drilling can be taken, but must take catch dirt,
Measurements for reduction, staff must wear proofing dust and protecting articles for use, be directly to cover the anchor pole disclosed in side resin metallic anchor pole that produces coal
Retracting device, should use wet boring, and dry drilling is a kind of non-standard operation；Patent (CN 203594369 U, CN
203594369 204,663,558 204,869,272 201,560,777 2475832 Y of U, CN of U, CN of U, CN of U, CN) etc. it is public
A kind of wet type coal side roofbolt recovering device is opened, its notable technical characteristic is hollow drill bit welding alloy piece, hollow drilling rod appearance
Face is straight wall, and the drilling rod does not have evagination or embedded helix, and coal is gone out by hollow drilling rod surfaces externally and internally using water as power
End；Hollow drilling rod internal diameter is 1.2~1.4 times of bolt diameter, or hollow drilling rod internal diameter is 20mm, or helps resin using coal
Anchor metal separates with Anchor Agent and departs from technique, by anchor pole protection inside drill rod body, by the coal around resin metallic anchor pole
Body and Anchor Agent are broken up, or when Anchor Agent anchoring strength is less high, drill bit and drilling rod internal diameter can be more than resin metallic anchor pole and bore
The diameter in hole, when Anchor Agent anchoring strength is higher, drill bit and drilling rod internal diameter are more than the solidification diameter of Anchor Agent；Hollow drilling rod is grown
Spend for 500~1000mm, or use multistage hollow drilling rod, resin metallic rock-bolt length multistage extension arm is helped according to coal；Rig
Sealing ring between connector be present.At present, in coal measure strata mine coal seam fully-mechanized mining working tunnel coal helps supporting, supporting pair
As being helped for tunnel coal, its lithology is mainly coal and gangue, and the Protodyakonov coefficient of coal is less than 3 more, and how small the Protodyakonov coefficient of gangue is
In 6.Coal side supporting parameter is mainly the coal side a diameter of 28mm of resin metallic armature boring, and coal side resin metallic bolt diameter is 18
~22mm；Coal side resin metallic rock-bolt length is 1800~2000mm, and maximum protruded length is 100mm, i.e. coal side resin metallic
Anchor rod effective length is 1700~1900mm；The a diameter of 23mm of matching Anchor Agent, length are 35mm or 60mm, single anchor
Gu agent maximum valid bonding length is 800mm, coal side resin metallic anchor pole free end length is 1000~1200mm；Supporting supporting
Equipment is anchor rod pallet board, nut, ladder beam and net.Resin metallic suspension roof support present situation is helped with reference to coal, in now disclosed wet type coal
Help in roofbolt recovering device patent, its shortcoming is：The cutting output of common alloy sheet hollow drill bit is small, and fltting speed is slower, works as coal
Help for spoil when, find that broken cash effect is poor in actual use, be short of power, need three people's operations；Partial monopoly discloses
Wet type coal side roofbolt recovering device, hollow drilling rod still be tubular structure auger stem, from discharge conny angle analysis, should
Spiral hollow core drilling rod operability is not strong；The eccentric throw of hollow drilling rod internal diameter is unreasonable, interference coal side anchor pole, directly covers disconnected coal side
Anchor pole phenomenon happens occasionally；Coal side rock-bolt length is 1800~2000mm, and hollow drilling rod helps supporting not using multistage drilling rod and coal
It is consistent；Connector is fast-assembling equipment, and the sealing ring durability connected between rig and connector is poor, and spoilage is higher.
The content of the invention
The purpose of the present invention is intended to overcome disadvantages mentioned above, there is provided a kind of safe operation, fltting speed are fast, it is good to break cash effect,
The high mine coal side anchor recovering method of recovery utilization rate.
To reach above-mentioned purpose, the present invention uses following solution：A kind of mine coal helps anchor recovering method, its feature
It is：Comprise the following steps：
(1) when ore deposit pressure does not show, in the range of fully-mechanized mining working advance support 20m, disassembly ＆ recycling coal side resin is golden successively
Belong to the coals such as anchor rod pallet board, nut, ladder beam and the net of anchor pole side support unit；When ore deposit pressure shows, away from fully-mechanized mining working faces end head
In the range of 5m, the coal such as anchor rod pallet board, nut, ladder beam and net of disassembly ＆ recycling coal side resin metallic anchor pole helps supporting structure successively
Part；
(2) produced coal using wet type coal side resin metallic anchor recovering drilling tool directly set and help resin metallic anchor pole, the wet type
Coal side resin metallic anchor recovering drilling tool includes connector, hollow drilling rod and hollow drill bit, connector, hollow drilling rod and core drill
Head is more than coal side resin metallic anchor pole and bored using threaded connection, hollow drill bit welding diamond compact, hollow drilling rod internal diameter
Bore dia and 2 times of eccentric throw sums；It is to break up coal using hollow bit bore to help around resin metallic anchor pole directly to extract technique
Coal or gangue and the Anchor Agent of extravasation, water as power by hollow drilling rod surfaces externally and internally rush row conny, then with sky
Core drilling rod directly extracts coal side resin metallic anchor pole and Anchor Agent.
Above-mentioned mine coal side anchor recovering method, it is characterised in that：Described hollow drilling rod quantity is each one of length,
Short hollow run of steel is that coal helps resin metallic anchor pole free end length, and long hollow run of steel is that coal helps resin metallic anchor pole to have
Imitate length.
Above-mentioned mine coal side anchor recovering method, it is characterised in that：Described diamond compact is 3 teeth, the facewidth
15mm, the high 25mm of tooth.
The present invention is that manually directly extraction, retracting device are straight in existing coal measure strata mine coal seam coal side resin metallic anchor pole
Connect and a kind of mine coal side anchor recovering method is provided on the basis of the methods of extraction and retracting device are directly extracted is analyzed.Its principle
For：(1) when ore deposit pressure does not show, in the range of fully-mechanized mining working advance support 20m, disassembly ＆ recycling coal helps resin metallic anchor pole successively
The coal such as anchor rod pallet board, nut, ladder beam and net side support unit, help resin metallic anchor recovering drilling tool direct using wet type coal
Set, which produces coal, helps resin metallic anchor pole；When ore deposit pressure shows, in the range of away from fully-mechanized mining working faces end head 5m, disassembly ＆ recycling coal side is set successively
The coals such as anchor rod pallet board, nut, ladder beam and the net of fat anchor metal help support unit, help resin metallic anchor pole to return using wet type coal
Receive drilling tool and directly cover the side resin metallic anchor pole that produces coal；(2) the direct set taking technique of coal side resin metallic anchor pole is using core drill
Bar directly extracts coal side resin metallic anchor pole and Anchor Agent, and what hollow bit bore was broken up is the coal or bastard coal around coal side anchor pole
Stone and the Anchor Agent of extravasation, water rush row's conny as power by hollow drilling rod surfaces externally and internally；(3) wet type coal side resin metallic
Anchor recovering drilling tool is mainly made up of connector, hollow drilling rod and the first-class three parts of core drill, wherein, due to lane side bastard coal body
Maximum Protodyakonov coefficient is smaller for the cutting output of the common alloy sheet hollow drill bit of 6,8 teeth, and broken cash effect is poor, and hollow drill bit is changed into gold
Hard rock composite sheet, 3 teeth, facewidth 15mm, the high 25mm of tooth；(4) hollow drilling rod internal diameter takes into full account eccentric throw E, and its calculation formula is E
=(D-d)/2, in formula, E is eccentric throw, and D is that coal helps resin metallic armature boring diameter, and d is that coal helps resin metallic bolt diameter,
Hollow drilling rod internal diameter is calculated based on eccentric throw, its calculation formula is Dn>=D+2E, in formula, DnFor hollow drilling rod internal diameter, branch is helped in coal
In shield, coal side resin metallic armature boring diameter D is 28mm, and coal side resin metallic bolt diameter d is 18~22mm, then eccentric throw
E is 3~5mm, hollow drilling rod internal diameter DnFor 34~38mm；(5) operation number of the present invention is two people, one man operation, and a people is responsible for
Safety, power source is common hand-held drill, in view of the space of fully-mechanized mining working advance support and end regions, hollow drilling rod quantity
For each one of length, short hollow run of steel is that coal helps resin metallic anchor pole free end length, and long hollow run of steel is helped for coal
Resin metallic anchor rod effective length, in coal helps supporting, coal side resin metallic rock-bolt length is 1800~2000mm, and coal helps resin
Anchor metal effective length is 1700~1900mm, and coal side resin metallic anchor pole free end length is 1000~1200mm, then two
The length of root hollow drilling rod, one is 1000~1200mm, and another is 1700~1900mm；(6) in view of the side of hand-held
Just property, the length and weight of hollow drilling rod, hollow drill pipe thickness are 4mm, and connector, hollow drilling rod and hollow drill bit use spiral shell
Line connects, for example, when hollow drilling rod internal diameter is 37mm, screw thread is M42 × 2mm, M type screw threads, nominal diameter 42mm, pitch
2mm, hollow drilling rod external diameter are 45mm.
Compared with prior art, the present invention has substantive distinguishing features following prominent and significant effect：
1st, a kind of mine coal side anchor recovering method of the present invention, supporting is helped from coal measure strata Mechanized tunnel coal
Angle, situation is shown according to ore deposit pressure, first successively the anchor rod pallet board of disassembly ＆ recycling coal side resin metallic anchor pole, nut, ladder beam and
The coals such as net side support unit, then help anchor recovering drilling tool directly to cover the side resin metallic anchor pole that produces coal using wet type resin metallic coal,
So simple and safe operation of the present invention, meets safety regulations in coal mine.
2nd, the hollow drill bit in wet type coal side of the present invention resin metallic anchor recovering drilling tool welds 3 tooth diamonds and answered
Close piece, the cutting output that can solves common alloy sheet hollow drill bit is small, fltting speed slowly, break that cash effect is poor, is short of power and more people
The problems such as operation；Internal diameter, wall thickness, quantity and the length of hollow drilling rod, can solve hollow drilling rod internal diameter and design unreasonable, interference coal
Help anchor pole, directly cover the problems such as disconnected coal side resin metallic anchor pole and multistage hollow drilling rod.
3rd, the present invention is widely used in coal measure strata mine laneway fully-mechanized mining working tunnel and Guo Kong lanes coal side resin metallic anchor
Bar recovery etc..
Brief description of the drawings
Fig. 1, wet type coal of the present invention side resin metallic anchor recovering drilling tool structure schematic diagram.
Fig. 2, hollow drilling rod internal diameter structural representation of the present invention.
In figure：1st, connector 2, hollow drilling rod 3, hollow drill bit 4, diamond compact 5, coal side resin metallic anchor pole
6th, Anchor Agent
Embodiment
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Embodiment 1：
The fully-mechanized mining working of certain ore deposit 15# coal seams 15109 arranges two crossheadings, i.e. haulage gate and air return way, haulage gate
Length is 767m, and non-side side of mining is left hand thread steel (25MnSi), 20 × 1800mm of Ф, helps armature boring depth 1700mm,
Exposed 100mm, array pitch 1500mm, a row 5；Air return way length is 1086m, and non-side side of mining is left hand thread steel
(25MnSi), 20 × 1800mm of Ф, help armature boring depth 1700mm, exposed 100mm, array pitch 1500mm, a row 4.
Present embodiment comprises the following steps：
(1) when ore deposit pressure does not show, in the range of fully-mechanized mining working advance support 20m, disassembly ＆ recycling coal side resin is golden successively
Belong to the coals such as anchor rod pallet board, nut, ladder beam and the net of anchor pole 5 side support unit；When ore deposit pressure shows, away from fully-mechanized mining working faces end head
In the range of 5m, the coal such as anchor rod pallet board, nut, ladder beam and net of disassembly ＆ recycling coal side resin metallic anchor pole 5 helps supporting structure successively
Part；
(2) produced coal using wet type coal side resin metallic anchor recovering drilling tool directly set and help resin metallic anchor pole, wet type coal side
Resin metallic anchor recovering drilling tool includes connector 1, hollow drilling rod 2 and hollow drill bit 3, and it is compound that hollow drill bit 3 welds diamond
The tooth of piece 4,3, facewidth 15mm, the high 25mm of tooth, the internal diameter of hollow drilling rod 2 are more than coal side resin metallic armature boring diameter and 2 times of bias
It is 37mm away from sum, the quantity of hollow drilling rod 2 is each one of length, and short hollow run of steel is that coal helps resin metallic anchor pole free
Length is held, be 1100mm, long hollow run of steel is coal side resin metallic anchor rod effective length, is 1700mm, the wall of hollow drilling rod 2
Thickness is 4mm, and connector 1, hollow drilling rod 2 and hollow drill bit 3 are using threaded connection, M42 × 2mm, M type screw threads, nominal diameter
42mm, pitch 2mm；It is to produce coal to help resin metallic anchor pole 5 and Anchor Agent 6 using the directly set of hollow drilling rod 2 directly to extract technique, empty
The coal or gangue and the Anchor Agent of extravasation 6 around coal side resin metallic anchor pole 5 are broken up in the drilling of core drill bit 3, and water is as power
Row's conny is rushed by the surfaces externally and internally of hollow drilling rod 3.
15109 working face haulage gates and air return way coal side resin metallic anchor recovering work well.
Embodiment 2：
The fully-mechanized mining working of certain ore deposit 15# coal seams 15109 needed eastern wing return airway, eastern wing adhesive tape lane and three, eastern wing tracks lane sky
Lane, the coal side resin metallic anchor pole arrangement in the three Tiao Kong lanes are：Two to help anchor pole material be left hand thread steel (25MnSi),
20 × 1800mm of Ф, help armature boring depth 1700mm, exposed 100mm, array pitch 1200mm, a row 4.Surpass in fully-mechanized mining working
In the range of preceding 20m, the coal side such as anchor rod pallet board, nut, ladder beam and net of disassembly ＆ recycling coal side resin metallic anchor pole supporting successively
Component, help resin metallic anchor recovering drilling tool directly set to produce coal using wet type coal and help resin metallic anchor pole, totally six, three Tiao Kong lanes
Coal side resin metallic anchor recovering works well.Other same embodiments 1.
Claims (3)
1. a kind of mine coal helps anchor recovering method, it is characterised in that：Comprise the following steps：
(1) when ore deposit pressure does not show, in the range of fully-mechanized mining working advance support 20m, disassembly ＆ recycling coal helps resin metallic anchor successively
Anchor rod pallet board, nut, ladder beam and the net of bar；When ore deposit pressure shows, in the range of away from fully-mechanized mining working faces end head 5m, dismantle back successively
Receive anchor rod pallet board, nut, ladder beam and the net of coal side resin metallic anchor pole；
(2) produced coal using wet type coal side resin metallic anchor recovering drilling tool directly set and help resin metallic anchor pole, the wet type coal side
Resin metallic anchor recovering drilling tool includes connector, hollow drilling rod and hollow drill bit, and connector, hollow drilling rod and hollow drill bit are equal
Using threaded connection, hollow drill bit welding diamond compact, it is straight that hollow drilling rod internal diameter is more than coal side resin metallic armature boring
Footpath and 2 times of eccentric throw sums；It is that the coal around coal side resin metallic anchor pole is broken up using hollow bit bore directly to extract technique
Or gangue and the Anchor Agent of extravasation, water rush row's conny by hollow drilling rod surfaces externally and internally as power, then use core drill
Bar directly extracts coal side resin metallic anchor pole and Anchor Agent.
2. mine coal according to claim 1 helps anchor recovering method, it is characterised in that：Described hollow drilling rod quantity is
Each one of length, short hollow run of steel are that coal helps resin metallic anchor pole free end length, and long hollow run of steel is coal side tree
Fat anchor metal effective length.
3. mine coal according to claim 1 helps anchor recovering method, it is characterised in that：Described diamond compact is
3 teeth, facewidth 15mm, the high 25mm of tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710729490.2A CN107401417A (en) | 2017-08-23 | 2017-08-23 | A kind of mine coal helps anchor recovering method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710729490.2A CN107401417A (en) | 2017-08-23 | 2017-08-23 | A kind of mine coal helps anchor recovering method |
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| CN107401417A true CN107401417A (en) | 2017-11-28 |
Family
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| CN201710729490.2A Pending CN107401417A (en) | 2017-08-23 | 2017-08-23 | A kind of mine coal helps anchor recovering method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577357A (en) * | 2020-04-07 | 2020-08-25 | 山西海洁机电科技有限公司 | Drilling and anchoring integrated hollow anchor rod and anchoring method |
| CN112324480A (en) * | 2020-11-25 | 2021-02-05 | 山西潞安集团余吾煤业有限责任公司 | Collapsible anchor rod device that moves back |
| CN112412508A (en) * | 2020-11-25 | 2021-02-26 | 晋城蓝焰煤业股份有限公司 | Method for fixing ground anchor construction and hard object extraction of coal seam broken bottom plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111577357A (en) * | 2020-04-07 | 2020-08-25 | 山西海洁机电科技有限公司 | Drilling and anchoring integrated hollow anchor rod and anchoring method |
| CN112324480A (en) * | 2020-11-25 | 2021-02-05 | 山西潞安集团余吾煤业有限责任公司 | Collapsible anchor rod device that moves back |
| CN112412508A (en) * | 2020-11-25 | 2021-02-26 | 晋城蓝焰煤业股份有限公司 | Method for fixing ground anchor construction and hard object extraction of coal seam broken bottom plate |
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