CN110454207A - Deep fractures exploit floor rock alley way anchor and take out integral method - Google Patents
Deep fractures exploit floor rock alley way anchor and take out integral method Download PDFInfo
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- CN110454207A CN110454207A CN201910824760.7A CN201910824760A CN110454207A CN 110454207 A CN110454207 A CN 110454207A CN 201910824760 A CN201910824760 A CN 201910824760A CN 110454207 A CN110454207 A CN 110454207A
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- 239000011435 rock Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000000605 extraction Methods 0.000 claims abstract description 77
- 238000005553 drilling Methods 0.000 claims abstract description 63
- 239000003245 coal Substances 0.000 claims abstract description 57
- 238000004873 anchoring Methods 0.000 claims abstract description 22
- 239000004575 stone Substances 0.000 claims abstract description 20
- 238000005086 pumping Methods 0.000 claims abstract description 11
- 238000003780 insertion Methods 0.000 claims abstract description 6
- 230000037431 insertion Effects 0.000 claims abstract description 6
- 239000004568 cement Substances 0.000 claims description 55
- 238000007789 sealing Methods 0.000 claims description 33
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 238000007569 slipcasting Methods 0.000 claims description 17
- 230000002265 prevention Effects 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 6
- 239000011440 grout Substances 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 3
- 230000007480 spreading Effects 0.000 claims description 3
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 230000010354 integration Effects 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/042—Threaded
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
Deep fractures exploit floor rock alley way anchor and take out integral method, comprising the following steps: (1) creep into: being crept into stone head using conventional drill, be drilled with multiple drillings；(2) insertion anchor takes out integrated apparatus in drilling, and the extraction section that anchor takes out integrated apparatus is located in coal seam, and the anchoring section that anchor takes out integrated apparatus is located in lithosphere；(3) anchor pumping integrated apparatus is anchored in drilling；(4) anchor is taken out integrated apparatus to connect with the extraction pipeline of the gas drainage system in stone head, carries out gas drainage.The present invention have the advantages that structure be simple and convenient to operate, be highly reliable, anchor take out it is at low cost.
Description
Technical field
The present invention relates to tunnel anchoring and coal bed gas extraction technical fields, specifically, are related to a kind of deep fractures and open
It adopts floor rock alley way anchor and takes out integral method.
Background technique
With the increase of coal mining depth and intensity, the risk of coal and gas prominent (hereinafter referred to as " protrusion ") increases
Greatly, protrusion-dispelling technical difficulty increases, and coal petrography mechanical characteristic is different under deep mining high-ground stress, high methane and High-geotemperature complex environment
In superficial part, the complexity and diversity, the large deformation of country rock and strong rheological properties, the deep coal and rock that develop such as stress field of the surrounding rock
Brittleness-ductility conversion, mutability of dynamic response etc.；Prominent mechanism is more complicated, and Deep ground stress leading type coal road is prominent
More highlight.
It is single at present projecting coal bed without exploitation protective layer condition, mainly use rock gangway to take out the outburst prevention measures of coal-bed gas in advance,
Rock gangway is usually placed in the lower section of coal road, inside and outside wrong flat away from generally 15-0 m.After deep part coal bed uses the measure, although
Gas Outburst potential is reduced, but is difficult to eliminate high-ground stress harm, it is prominent that crustal stress leading type still has occurred.In addition, China
Industry laws do not allow to implement region outburst prevention measures in this coal seam of severe outburst coal in principle.Using the simple extraction of conventional method
Coal-bed gas is difficult to eliminate crustal stress leading type outburst danger, for Deep Mine high-ground stress, single severe outburst coal coal
Lane region protrusion-dispelling is promoted and carries out release using pre- pick rock gangway, and the pressure-relief outburst-prevention technology gesture of layer-through drilling mash gas extraction is combined to exist
It must go.
During the driving in coal seam rock stratum tunnel, to reduce Gas Outburst potential to the greatest extent, eliminating high-ground stress
Harm, the supporting of stone head and gas drainage are most important.The current main technique that brill is applied using first driving supporting, rear extraction
Technology, which is primarily present support process and extraction technique is mutually incoherent, and the integral construction period is long, is difficult to effectively eliminate
The problems such as high-ground stress endangers, and draining coal seam gas, the easy collapse hole of drilling cannot deform, be closed seriously in time, and extraction channel is unsmooth,
Especially in deep mining, these problems can be more serious.Based on this, it is necessary to improve the supporting and extraction in deep rock tunnel
Technique improves the safety and reliability of production.
In order to solve the above problems, people are seeking always a kind of ideal technical solution.
Summary of the invention
The object of the present invention is to provide a kind of deep fractures exploitation floor rock alley way anchors to take out integral method, present invention tool
Have the advantages that structure be simple and convenient to operate, be highly reliable, anchor take out it is at low cost.
To achieve the above object, the present invention adopts the following technical scheme:
Deep fractures exploit floor rock alley way anchor and take out integral method, comprising the following steps:
(1) it creeps into: being crept into stone head using conventional drill, be drilled with multiple drillings；
(2) suitable anchor is selected to take out one according to three coal seam buried depth, coal seam gas-bearing capacity size, rock mass completeness indexs
Body makeup is set, and selected anchor pumping integrated apparatus is inserted into drilling, the extraction section for making anchor take out integrated apparatus is located at coal
In layer, the anchoring section that anchor takes out integrated apparatus is located in lithosphere；
(3) anchor pumping integrated apparatus is anchored in drilling；
(4) anchor is taken out integrated apparatus to connect with the extraction pipeline of the gas drainage system in stone head, carries out gas drainage.
It is that taper sheath tubular type anchor takes out integrated apparatus that the anchor, which takes out integrated apparatus, and taper sheath tubular type anchor takes out one makeup
It sets including hollow bolt body, extraction floral tube, several centralizers, sealing of hole component, anchor disc and nut, is protruded into hollow bolt body
Be front end to one end of bore inner, the front end of hollow bolt body is threadedly coupled with the rear end of extraction floral tube, if extraction floral tube by
The dry coaxial threaded connection composition of the short floral tube of root, each centralizer equidistant intervals are successively sleeved on extraction floral tube, sealing of hole group
Part and anchor disc are sleeved on hollow bolt body, and sealing of hole component is located on front side of the leading flank of anchor disc, and nut thread is connected to
The rear lateral portion of hollow bolt body and the trailing flank for being pressed on anchor disc；
Sealing of hole component includes cylinder-shaped plastic cement expansion set, conical plastic cement expansion set and crowded expansion set pipe, cylinder-shaped plastic cement expansion set, cone
Plastic cement expansion set and crowded expansion set pipe are successively sleeved on hollow bolt body from front to back with center, and the front end of cylinder-shaped plastic cement expansion set is logical
It crosses anchor ear to be fixedly connected on hollow bolt body, the inner hole of conical plastic cement expansion set and the excircle of hollow bolt body slide and connect
It connects, squeezes expansion set pipe and connected with the external peripheral threads of hollow bolt body, the excircle of conical plastic cement expansion set is front fine and rear thick, cone
The front end of plastic cement expansion set is inserted into inside the rear end of cylinder-shaped plastic cement expansion set, and the front end for squeezing expansion set pipe is equipped with front fine and rear thick circular cone top
Pressure head, the front end of circular cone pressure end are extend into inside the rear end of conical plastic cement expansion set, and the rear end for squeezing expansion set pipe is located at anchor disc
Leading flank on front side of, the rear end periphery for squeezing expansion set pipe is equipped with the six rib structures that are engaged by clamping with spanner.
Step (2) specifically: step (2) specifically: first according to coal seam section drillable length and rock interval drillable length,
It determines the length of extraction floral tube and hollow bolt body, is then connected as one extraction floral tube and hollow bolt body, in extraction flower
Each centralizer is installed outside pipe, and cylinder-shaped plastic cement expansion set cone plastic cement expansion set is installed outside hollow bolt body and is squeezed swollen
After casing in insertion drilling, so that extraction floral tube is protruded into bottom in drilling and be located in coal seam, hollow bolt body is located in lithosphere.
Step (3) specifically: the six rib structures that crowded expansion set pipe rear end is blocked using spanner or lengthening casing are rotated and squeeze expansion set
Pipe makes its forward movement, and the circular cone pressure end for squeezing expansion set pipe front end pushes conical plastic cement expansion set to move forward, conical plastic cement
While expansion set periphery expands outward, conical plastic cement expansion set is squeezed into forward in cylinder-shaped plastic cement expansion set, keeps cylinder-shaped plastic cement swollen
The drill hole inner wall of lateral wall and rock interval presses patch after set expansion, cylinder-shaped plastic cement expansion set and conical plastic cement expansion set expansion
It closes, to block drilling and position hollow bolt body, achievees the effect that dual-seal positions；Anchor disc and nut are successively pacified again
Mounted in hollow bolt body rear lateral portion, tightening nut pushes anchor disc, moves forward anchor disc, the port of anchor disc covering drilling
And be pressed on stone head inner wall, so realize anchoring and sealing of hole；
Step (4) specifically: connect the rear end of hollow bolt body with the extraction pipeline of gas drainage system, to carry out gas
Extraction.
It is that hollow slip casting type anchor takes out integrated apparatus that the anchor, which takes out integrated apparatus, and hollow slip casting type anchor takes out one makeup
It sets and rises shell anchor head, sealing of hole component, anchor disc and nut including hollow bolt body, extraction floral tube, several centralizers, steel, with
One end that hollow bolt body extend into bore inner is front end, and hollow bolt body is connected by the coaxial screw thread of several short hollow bolt
Composition is connect, extraction floral tube is made of the coaxial threaded connection of several short floral tube, and each centralizer equidistant intervals are successively set with
On extraction floral tube and hollow bolt body, steel rises by shell anchor head in front fine and rear thick and rear end opening conical shell structure, steel
The shell anchor head that rises is fixedly mounted on the front side portion excircle of hollow bolt body with center, during sealing of hole component and anchor disc are sleeved on
On the spare anchor body of rod, sealing of hole component is located on front side of the leading flank of anchor disc, nut thread be connected to the rear lateral portion of hollow bolt body and
It is pressed on the trailing flank of anchor disc；
Sealing of hole component includes stop grouting plug and Grouting Pipe, and the excircle of stop grouting plug is in front fine and rear thick conical structure, stop grouting plug suit
On hollow bolt body, the excircle of stop grouting plug and hollow bolt body is slidably connected, and Grouting Pipe is along the longitudinal direction through hollow bolt
The rear end of body is inserted into hollow bolt body, and Grouting Pipe is fixedly connected with the inner wall of hollow bolt body, the side wall of hollow bolt body
On offer mounting hole on front side of stop grouting plug, the front end of Grouting Pipe passes through mounting hole and stretches out hollow bolt body, Grouting Pipe
Rear lateral portion stretches out the rear end of hollow bolt body, and the rear lateral portion of Grouting Pipe is equipped with overflow prevention valve.
Step (2) specifically: first according to coal seam section drillable length and rock interval drillable length, determine extraction floral tube and
Then extraction floral tube and hollow bolt body are connected as one by the length of hollow bolt body, outside extraction floral tube and middle spare anchor
Each centralizer is installed outside the body of rod, installation steel rises after shell anchor head in insertion drilling outside the hollow bolt body front side portion,
Make extraction floral tube protrude into bottom in drilling to be located in coal seam, hollow bolt body is located in lithosphere, and the steel shell anchor head that rises is placed on
In the drilling of the rock interval of lithosphere and coal seam intersection.
Step (3) specifically: stop grouting plug, anchor disc and nut are sequentially arranged on hollow bolt body, then reversion or
It is pulled outwardly hollow bolt body, so that the steel shell anchor head spreading that rises is blocked drill hole inner wall, to position hollow bolt body, stop grouting plug is got lodged in
At the port of drilling, tightening nut pushes anchor disc, moves forward anchor disc, and the port of anchor disc covering drilling is simultaneously pressed on
On stone head inner wall, then Grouting Pipe connected with grouting pump by grout outlet, open overflow prevention valve, starting grouting pump is infused
Slurry when grouting pressure reaches design pressure, continues slip casting 2-3min, overflow prevention valve and grouting pump is then shut off, by grout outlet and note
Pipe separation is starched, slip casting is completed, in this way, being full of mud in the drilling of rock interval, by borehole sealing and enhances anchor after mud solidification
Gu；
Step (4) specifically: connect the rear end of hollow bolt body with the extraction pipeline of gas drainage system, to carry out gas
Extraction.
The present invention has substantive distinguishing features outstanding and significant progress compared with the prior art, specifically:
(1) hollow bolt body and extraction floral tube are connected as one by the present invention, realize anchoring reinforcing and the coal seam of stone head
The integration of gas drainage, has saved cost, improves security reliability, effectively increases the anchoring strength of stone head, again
Increase the tight degree of sealing of hole of drilling.
(2) present invention devises two kinds of anchors and takes out integrated apparatus: taper sheath tubular type anchor takes out integrated apparatus and hollow slip casting
Formula anchor takes out integrated apparatus, to meet anchoring under different condition to stone head and gas drainage.
(3) the invention proposes made with three coal seam buried depth, coal seam gas-bearing capacity size, rock mass completeness indexs
To select anchor to take out the foundation of technique, engineer operation is made to shoot the arrow at the target；
Taper sheath tubular type anchor takes out integrated apparatus and is suitable for coal seam buried depth < 600m, 10 m of coal seam gas-bearing capacity size <3/
T and floor rock integrated degree are the more complete or complete objective condition set up simultaneously, and taper sheath tubular type anchor takes out one makeup
It sets and not only enhances seat earth rock strength, while sealing of hole has been carried out to mash gas pumping drilling, and taper sheath tubular type anchor is taken out
Integrated apparatus can reuse, and reduce costs；
Hollow slip casting type anchor takes out integrated apparatus and is suitable for coal seam buried depth >=600m, coal seam gas-bearing capacity size >=10 m3/
T or floor rock integrated degree are any one of relatively broken, broken or smashed to pieces objective condition set up, and hollow slip casting type anchor takes out one
Body makeup, which is set, can strengthen broken base plate strength, play good extraction borehole sealing effect, in sealing material (mud) and anchoring
Under the collective effect of section rigid material, the ability that stress is resisted in drilling is increased, avoids drilling deformation and collapse hole, it is ensured that take out
The stabilization of borehole ensure that the unimpeded of gas flow channel in hole.
(4) anchor takes out the anchorage length that integration extends anchoring section, increases anchoring section bearing stress length, is effectively relieved
Stress concentration, strengthens the shearing strength of anchoring, increases the stability of lithosphere.
(5) present invention is adjacent according to the determination such as coal seam gas-bearing capacity size, gas drainage radius, coal seam rock mass completeness
The spacing of wells, can according to the length of actual borehole length adjustment anchoring section and extraction section, increase practicability of the invention and
Adaptability.
The present invention have the advantages that structure be simple and convenient to operate, be highly reliable, anchor take out it is at low cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that anchor takes out integrated apparatus in the embodiment of the present invention 1.
Fig. 2 is that installation anchor takes out the schematic diagram of integrated apparatus in drilling in the embodiment of the present invention 1.
Fig. 3 is that anchor takes out integrated apparatus anchoring sealing of hole schematic diagram in the embodiment of the present invention 1.
Fig. 4 is the structural schematic diagram that anchor takes out integrated apparatus in the embodiment of the present invention 2.
Fig. 5 is partial enlarged view at A in Fig. 4.
Fig. 6 is that installation anchor takes out the schematic diagram of integrated apparatus in drilling in the embodiment of the present invention 2.
Fig. 7 is that anchor takes out integrated apparatus anchoring sealing of hole schematic diagram in the embodiment of the present invention 2.
Specific embodiment
The following is further explained with reference to the attached drawings the embodiment of the present invention.
Embodiment 1
As shown in Figure 1-Figure 3, deep fractures exploitation floor rock alley way anchor takes out integral method, comprising the following steps:
(1) it creeps into: being crept into stone head 1 using conventional drill, be drilled with multiple drillings 2；
(2) suitable anchor is selected to take out one according to three coal seam buried depth, coal seam gas-bearing capacity size, rock mass completeness indexs
Body makeup is set, and selected anchor pumping integrated apparatus is inserted into drilling 2, the extraction section for making anchor take out integrated apparatus is located at coal
In layer 3, the anchoring section that anchor takes out integrated apparatus is located in lithosphere 4；
(3) anchor pumping integrated apparatus is anchored in drilling 2；
(4) anchor is taken out integrated apparatus to connect with the extraction pipeline of the gas drainage system in stone head 1, carries out gas pumping
It adopts.
It is that taper sheath tubular type anchor takes out integrated apparatus that the anchor of the embodiment, which takes out integrated apparatus, and taper sheath tubular type anchor takes out one
Makeup is set including hollow bolt body 5, extraction floral tube 6, several centralizers 7, sealing of hole component, anchor disc 8 and nut 9, with hollow
One end that anchor bar body 5 is extend into inside drilling 2 is front end, and the front end of hollow bolt body 5 and the rear end screw thread of extraction floral tube 6 connect
It connects, extraction floral tube 6 is made of the coaxial threaded connection of several short floral tube, and each 7 equidistant intervals of centralizer are successively sleeved on
On extraction floral tube 6, sealing of hole component and anchor disc 8 are sleeved on hollow bolt body 5, and sealing of hole component is located at the front side of anchor disc 8
On front side of face, nut 9 is threaded in the rear lateral portion of hollow bolt body 5 and is pressed on the trailing flank of anchor disc 8；
Sealing of hole component includes cylinder-shaped plastic cement expansion set 10, conical plastic cement expansion set 11 and crowded expansion set pipe 12, cylinder-shaped plastic cement expansion set
10, conical plastic cement expansion set 11 and crowded expansion set pipe 12 are successively sleeved on hollow bolt body 5 from front to back with center, and cylinder shapes
The front end of glue expansion set 10 is fixedly connected on hollow bolt body 5 by anchor ear 19, the inner hole of conical plastic cement expansion set 11 and hollow
The excircle of anchor bar body 5 is slidably connected, and squeezes expansion set pipe 12 and connects with the external peripheral threads of hollow bolt body 5, conical plastic cement is swollen
The excircle of set 11 is front fine and rear thick, and the front end of conical plastic cement expansion set 11 is inserted into inside the rear end of cylinder-shaped plastic cement expansion set 10, squeezes
The front end of expansion set pipe 12 is equipped with front fine and rear thick circular cone pressure end 20, and it is swollen that the front end of circular cone pressure end 20 extend into conical plastic cement
Inside the rear end of set 11, the rear end for squeezing expansion set pipe 12 is located on front side of the leading flank of anchor disc 8, and the rear end periphery for squeezing expansion set pipe 12 is set
There are six rib structures being engaged by clamping with spanner.
Step (2) specifically: first according to 3 sections of coal seam, 2 length of drilling and 4 sections of lithosphere 2 length of drilling, determine extraction flower
Then extraction floral tube 6 and hollow bolt body 5 are connected as one by the length of pipe 6 and hollow bolt body 5, outside extraction floral tube 6
Installing each centralizer 7(centralizer 7 can weld on extraction floral tube 6), cylinder-shaped plastic cement is installed outside hollow bolt body 5
After expansion set 10, conical plastic cement expansion set 11 and crowded expansion set pipe 12 in insertion drilling 2, extraction floral tube 6 is made to protrude into bottom position in drilling 2
In coal seam 3, hollow bolt body 5 is located in lithosphere 4.
Step (3) specifically: six rib structures of crowded 12 rear end of expansion set pipe are blocked using spanner or lengthening casing, rotation is squeezed swollen
Casing 12 makes its forward movement, and the circular cone pressure end 20 for squeezing 12 front end of expansion set pipe pushes conical plastic cement expansion set 11 to move forward,
While conical 11 periphery of plastic cement expansion set expands outward, conical plastic cement expansion set 11 squeezes into forward cylinder-shaped plastic cement expansion set 10
In, expand cylinder-shaped plastic cement expansion set 10, lateral wall and rock after cylinder-shaped plastic cement expansion set 10 and conical 11 expansion of plastic cement expansion set
2 inner wall of drilling that 4 sections of rock layers presses fitting, to block drilling 2 and position hollow bolt body 5, reaches dual-seal positioning
Effect；Anchor disc 8 and nut 9 are sequentially arranged at 5 rear lateral portion of hollow bolt body again, tightening nut 9 pushes anchor disc 8, makes anchor
Gu disk 8 moves forward, the port of the covering of anchor disc 8 drilling 2 is simultaneously pressed on 1 inner wall of stone head, so realizes anchoring and envelope
Hole；
Step (4) specifically: connect the rear end of hollow bolt body 5 with the extraction pipeline of gas drainage system, thus progress watt
This extraction.
Drilling machine, gas drainage system, extraction pipeline and anchor ear 19 are ordinary elements, and specific configuration and working principle are no longer
It repeats.
Embodiment 2
As shown in Figure 4-Figure 7, unlike the first embodiment: the anchor of the embodiment takes out integrated apparatus as hollow slip casting type anchor pumping
Integrated apparatus, it includes hollow bolt body 5, extraction floral tube 6, several centralizers 7, steel that hollow slip casting type anchor, which takes out integrated apparatus,
Matter rises shell anchor head 13, sealing of hole component, anchor disc 8 and nut 9, before being with one end that hollow bolt body 5 is extend into inside drilling 2
End, hollow bolt body 5 are made of the coaxial threaded connection of several short hollow bolt, and extraction floral tube 6 is same by several short floral tubes
Axial thread connection composition, each 7 equidistant intervals of centralizer are successively sleeved on extraction floral tube 6 and hollow bolt body 5, steel
The shell anchor head 13 that rises is in front fine and rear thick and rear end opening conical shell structure, and steel rises during shell anchor head 13 is fixedly mounted on center
On the front side portion excircle of the spare anchor body of rod 5, sealing of hole component and anchor disc 8 are sleeved on hollow bolt body 5, and sealing of hole component is located at
On front side of the leading flank of anchor disc 8, nut 9 is threaded in the rear lateral portion of hollow bolt body 5 and is pressed on the rear side of anchor disc 8
Face；
Sealing of hole component includes stop grouting plug 14 and Grouting Pipe 15, and the excircle of stop grouting plug 14 is in front fine and rear thick conical structure, is only starched
Plug 14 is sleeved on hollow bolt body 5, and the excircle of stop grouting plug 14 and hollow bolt body 5 is slidably connected, and Grouting Pipe 15 is along front and back
Direction is inserted into hollow bolt body 5 through the rear end of hollow bolt body 5, and the inner wall of Grouting Pipe 15 and hollow bolt body 5 is fixed to be connected
It connects, the mounting hole positioned at 14 front side of stop grouting plug is offered on the side wall of hollow bolt body 5, the front end of Grouting Pipe 15 passes through mounting hole
Hollow bolt body 5 is stretched out, the rear lateral portion of Grouting Pipe 15 stretches out the rear end of hollow bolt body 5, and the rear lateral portion of Grouting Pipe 15 is equipped with
Overflow prevention valve 16.
Step (2) specifically: first according to 3 sections of coal seam, 2 length of drilling and 4 sections of lithosphere 2 length of drilling, determine extraction flower
Then extraction floral tube 6 and hollow bolt body 5 are connected as one by the length of pipe 6 and hollow bolt body 5, outside extraction floral tube 6
With each centralizer 7 is installed outside hollow bolt body 5, steel is installed outside 5 front side portion of hollow bolt body and is risen shell anchor head 13
Afterwards in insertion drilling 2, so that extraction floral tube 6 is protruded into bottom in drilling 2 and be located in coal seam 3, hollow bolt body 5 is located in lithosphere 4,
The steel shell anchor head 13 that rises is disposed close in 4 sections of lithosphere of 3 intersection of lithosphere 4 and coal seam drillings 2.
Step (3) specifically: stop grouting plug 14, anchor disc 8 and nut 9 are sequentially arranged at 5 rear lateral portion of hollow bolt body, so
After invert or be pulled outwardly hollow bolt body 5, make steel rise 13 spreading of shell anchor head block drilling 2 inner walls, to position hollow bolt
Body 5, stop grouting plug 14 are got lodged at the port of drilling 2, and tightening nut 9 pushes anchor disc 8, move forward anchor disc 8, anchor disc 8
The port of covering drilling 2 is simultaneously pressed on 1 inner wall of stone head, then Grouting Pipe 15 and grouting pump 17 are connected by grout outlet 18
It connects, opens overflow prevention valve 16, starting grouting pump 17 carries out slip casting, when grouting pressure reaches design pressure, continues slip casting 2-3min, so
Overflow prevention valve 16 and grouting pump 17 are closed afterwards, grout outlet 18 and Grouting Pipe 15 are separated, completes slip casting, in this way, 4 sections of lithosphere drillings
It is full of mud in 2, drilling 2 is blocked after mud solidification and enhances anchoring；
Step (4) specifically: connect the rear end of hollow bolt body 5 with the extraction pipeline of gas drainage system, thus progress watt
This extraction.
φ 42mm, φ 50mm, φ 75mm, φ 94mm, φ 112mm, φ 120mm etc. can be used in 2 diameters that drill, to reinforce rock
The anchoring effect in stone tunnel 1 generally uses slim hole, based on the drilling drilling of φ 42mm, φ 50mm.Adjacent drilling 2
Spacing is determined by coal seam gas-bearing capacity size, gas drainage radius, rock mass completeness etc., if rock crushing is serious, can be added
Close drilling 2 carries out reinforcing anchoring support to stone head 1, while carrying out enhanced gas extraction to the gas in coal seam 3.
The present invention is according to three coal seam buried depth, coal seam gas-bearing capacity size, rock mass completeness indexs as selection
Anchor takes out the foundation of technique, so that engineer operation is shot the arrow at the target, is specifically shown in Tables 1 and 2:
1 anchor of table takes out integrated apparatus and method selection foundation
The qualitative classification of 2 rock mass completeness of table
Rule of thumb regulation only has three coal seam buried depth, coal seam gas-bearing capacity, rock mass completeness indexs full simultaneously
When foot selects anchor pumping integral method in embodiment 1, anchor in embodiment 1 is just selected to take out integral method, as long as and coal seam is buried
Depth, coal seam gas-bearing capacity, any index in three indexs of rock mass completeness, which meet, selects anchor in embodiment 2 to take out integration
When method, anchor in embodiment 2 is just selected to take out integral method.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to this hair
It is bright to be described in detail, those skilled in the art should understand that；Still the present invention can be modified or be waited
With replacement, without departing from the spirit or scope of the invention, or any substitutions, should all cover in power of the invention
In sharp claimed range.
Claims (7)
1. deep fractures exploit floor rock alley way anchor and take out integral method, it is characterised in that: the following steps are included:
(1) it creeps into: being crept into stone head using conventional drill, be drilled with multiple drillings；
(2) suitable anchor is selected to take out one according to three coal seam buried depth, coal seam gas-bearing capacity size, rock mass completeness indexs
Body makeup is set, and selected anchor pumping integrated apparatus is inserted into drilling, the extraction section for making anchor take out integrated apparatus is located at coal
In layer, the anchoring section that anchor takes out integrated apparatus is located in lithosphere；
(3) anchor pumping integrated apparatus is anchored in drilling；
(4) anchor is taken out integrated apparatus to connect with the extraction pipeline of the gas drainage system in stone head, carries out gas drainage.
2. deep fractures exploitation floor rock alley way anchor according to claim 1 takes out integral method, it is characterised in that: institute
It is that taper sheath tubular type anchor takes out integrated apparatus that the anchor stated, which takes out integrated apparatus, and it includes hollow that taper sheath tubular type anchor, which takes out integrated apparatus,
Anchor bar body, extraction floral tube, several centralizers, sealing of hole component, anchor disc and nut extend into bore inner with hollow bolt body
One end be front end, the front end of hollow bolt body is threadedly coupled with the rear end of extraction floral tube, and extraction floral tube is by several short floral tubes
Coaxial threaded connection composition, each centralizer equidistant intervals are successively sleeved on extraction floral tube, sealing of hole component and anchor disc
It is sleeved on hollow bolt body, sealing of hole component is located on front side of the leading flank of anchor disc, and nut thread is connected to hollow bolt body
Rear lateral portion and be pressed on the trailing flank of anchor disc；
Sealing of hole component includes cylinder-shaped plastic cement expansion set, conical plastic cement expansion set and crowded expansion set pipe, cylinder-shaped plastic cement expansion set, cone
Plastic cement expansion set and crowded expansion set pipe are successively sleeved on hollow bolt body from front to back with center, and the front end of cylinder-shaped plastic cement expansion set is logical
It crosses anchor ear to be fixedly connected on hollow bolt body, the inner hole of conical plastic cement expansion set and the excircle of hollow bolt body slide and connect
It connects, squeezes expansion set pipe and connected with the external peripheral threads of hollow bolt body, the excircle of conical plastic cement expansion set is front fine and rear thick, cone
The front end of plastic cement expansion set is inserted into inside the rear end of cylinder-shaped plastic cement expansion set, and the front end for squeezing expansion set pipe is equipped with front fine and rear thick circular cone top
Pressure head, the front end of circular cone pressure end are extend into inside the rear end of conical plastic cement expansion set, and the rear end for squeezing expansion set pipe is located at anchor disc
Leading flank on front side of, the rear end periphery for squeezing expansion set pipe is equipped with the six rib structures that are engaged by clamping with spanner.
3. stone head deep fractures exploitation floor rock alley way anchor according to claim 2 takes out integral method, special
Sign is: step (2) specifically: first according to coal seam section drillable length and rock interval drillable length, determine extraction floral tube and
Then extraction floral tube and hollow bolt body are connected as one by the length of hollow bolt body, install outside extraction floral tube each
A centralizer is inserted into drilling after installing cylinder-shaped plastic cement expansion set cone plastic cement expansion set and crowded expansion set pipe outside hollow bolt body
In, so that extraction floral tube is protruded into bottom in drilling and be located in coal seam, hollow bolt body is located in lithosphere.
4. deep fractures exploitation floor rock alley way anchor according to claim 3 takes out integral method, it is characterised in that: step
Suddenly (3) specifically: the six rib structures that crowded expansion set pipe rear end is blocked using spanner or lengthening casing, rotating crowded expansion set pipe makes it forward
Mobile, the circular cone pressure end for squeezing expansion set pipe front end pushes conical plastic cement expansion set to move forward, circumferential outside conical plastic cement expansion set
While outer expansion, conical plastic cement expansion set is squeezed into forward in cylinder-shaped plastic cement expansion set, expands cylinder-shaped plastic cement expansion set, cylinder
Lateral wall presses with the drill hole inner wall of rock interval after shaped plastic glue expansion set and conical plastic cement expansion set expansion is bonded, to block brill
Hole simultaneously positions hollow bolt body, achievees the effect that dual-seal positions；Anchor disc and nut are sequentially arranged at hollow bolt again
Body rear lateral portion, tightening nut push anchor disc, move forward anchor disc, and the port of anchor disc covering drilling is simultaneously pressed on rock
On the inner wall of tunnel, anchoring and sealing of hole are so realized；
Step (4) specifically: connect the rear end of hollow bolt body with the extraction pipeline of gas drainage system, to carry out gas
Extraction.
5. deep fractures exploitation floor rock alley way anchor according to claim 1 takes out integral method, it is characterised in that: institute
It is that hollow slip casting type anchor takes out integrated apparatus that the anchor stated, which takes out integrated apparatus, and it includes hollow that hollow slip casting type anchor, which takes out integrated apparatus,
Anchor bar body, extraction floral tube, several centralizers, steel rise shell anchor head, sealing of hole component, anchor disc and nut, with hollow bolt body
The one end for extending into bore inner is front end, and hollow bolt body is made of the coaxial threaded connection of several short hollow bolt, takes out
Pipe of picking flowers is made of the coaxial threaded connection of several short floral tube, and each centralizer equidistant intervals are successively sleeved on extraction floral tube
On hollow bolt body, steel rises by shell anchor head in front fine and rear thick and rear end opening conical shell structure, and the steel shell anchor head that rises is same
Center is fixedly mounted on the front side portion excircle of hollow bolt body, and sealing of hole component and anchor disc are sleeved on hollow bolt body
On, sealing of hole component is located on front side of the leading flank of anchor disc, and nut thread is connected to the rear lateral portion of hollow bolt body and is pressed on anchor
Gu the trailing flank of disk；
Sealing of hole component includes stop grouting plug and Grouting Pipe, and the excircle of stop grouting plug is in front fine and rear thick conical structure, stop grouting plug suit
On hollow bolt body, the excircle of stop grouting plug and hollow bolt body is slidably connected, and Grouting Pipe is along the longitudinal direction through hollow bolt
The rear end of body is inserted into hollow bolt body, and Grouting Pipe is fixedly connected with the inner wall of hollow bolt body, the side wall of hollow bolt body
On offer mounting hole on front side of stop grouting plug, the front end of Grouting Pipe passes through mounting hole and stretches out hollow bolt body, Grouting Pipe
Rear lateral portion stretches out the rear end of hollow bolt body, and the rear lateral portion of Grouting Pipe is equipped with overflow prevention valve.
6. deep fractures exploitation floor rock alley way anchor according to claim 5 takes out integral method, it is characterised in that: step
Suddenly (2) specifically: first according to coal seam section drillable length and rock interval drillable length, determine extraction floral tube and hollow bolt body
Length, then extraction floral tube and hollow bolt body are connected as one, pacified outside the extraction floral tube and outside hollow bolt body
Each centralizer is installed, installation steel rises after shell anchor head in insertion drilling outside the hollow bolt body front side portion, makes extraction floral tube
It protrudes into bottom in drilling to be located in coal seam, hollow bolt body is located in lithosphere, and the steel shell anchor head that rises is disposed close to lithosphere
In the rock interval drilling of coal seam intersection.
7. deep fractures exploitation floor rock alley way anchor according to claim 6 takes out integral method, it is characterised in that: step
Suddenly (3) specifically: stop grouting plug, anchor disc and nut are sequentially arranged on hollow bolt body, then inverts or is pulled outwardly and is hollow
Anchor bar body makes the steel shell anchor head spreading that rises block drill hole inner wall, to position hollow bolt body, stop grouting plug gets lodged in the port of drilling
Place, tightening nut push anchor disc, move forward anchor disc, and the port of anchor disc covering drilling is simultaneously pressed in stone head
On wall, then Grouting Pipe connected with grouting pump by grout outlet, open overflow prevention valve, starting grouting pump carries out slip casting, grouting pressure
When reaching design pressure, continue slip casting 2-3min, be then shut off overflow prevention valve and grouting pump, grout outlet and Grouting Pipe are separated, it is complete
At slip casting, by borehole sealing and anchoring is enhanced in this way, be full of mud in the drilling of rock interval, after mud solidification；
Step (4) specifically: connect the rear end of hollow bolt body with the extraction pipeline of gas drainage system, to carry out gas
Extraction.
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| CN201910824760.7A CN110454207B (en) | 2019-09-02 | 2019-09-02 | Anchor pumping integrated method for deep coal seam mining floor rock roadway |
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| CN201910824760.7A CN110454207B (en) | 2019-09-02 | 2019-09-02 | Anchor pumping integrated method for deep coal seam mining floor rock roadway |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113250725A (en) * | 2021-06-09 | 2021-08-13 | 中国电建集团成都勘测设计研究院有限公司 | Expansion anchor cable and anchor rod supporting method |
| CN113969798A (en) * | 2021-09-08 | 2022-01-25 | 齐鲁理工学院 | Anchoring device for supporting coal mine tunnel roof |
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| CN110454207B (en) | 2020-11-13 |
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