CN104295309B - A kind of jet perforating hollow grouting anchor and its construction method with framework of steel reinforcement - Google Patents
A kind of jet perforating hollow grouting anchor and its construction method with framework of steel reinforcement Download PDFInfo
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- CN104295309B CN104295309B CN201410598954.7A CN201410598954A CN104295309B CN 104295309 B CN104295309 B CN 104295309B CN 201410598954 A CN201410598954 A CN 201410598954A CN 104295309 B CN104295309 B CN 104295309B
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- 230000002787 reinforcement Effects 0.000 title claims abstract description 73
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 42
- 239000010959 steel Substances 0.000 title claims abstract description 42
- 238000010276 construction Methods 0.000 title claims abstract description 14
- 239000011435 rock Substances 0.000 claims abstract description 50
- 239000002689 soil Substances 0.000 claims abstract description 50
- 238000005422 blasting Methods 0.000 claims abstract description 48
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 25
- 238000007569 slipcasting Methods 0.000 claims abstract description 21
- 238000004140 cleaning Methods 0.000 claims abstract description 9
- 239000004744 fabric Substances 0.000 claims abstract description 4
- 238000007689 inspection Methods 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- 238000005553 drilling Methods 0.000 claims description 24
- 230000001186 cumulative effect Effects 0.000 claims description 14
- 239000004568 cement Substances 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 239000003814 drug Substances 0.000 claims description 10
- 239000002360 explosive Substances 0.000 claims description 10
- 239000008188 pellet Substances 0.000 claims description 10
- 239000011083 cement mortar Substances 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 7
- 239000004575 stone Substances 0.000 claims description 7
- 235000000396 iron Nutrition 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 3
- 238000004880 explosion Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims 2
- 238000011161 development Methods 0.000 claims 1
- 238000004873 anchoring Methods 0.000 abstract description 16
- 208000005189 Embolism Diseases 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 9
- 238000007596 consolidation process Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005065 mining Methods 0.000 description 3
- 230000037452 priming Effects 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- 229910001341 Crude steel Inorganic materials 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000020004 porter Nutrition 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 208000032837 Ring chromosome 16 syndrome Diseases 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
- E21D20/021—Grouting with inorganic components, e.g. cement
-
- 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
- E21D21/002—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection using explosives charges
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)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of jet perforating hollow grouting anchor with framework of steel reinforcement, including blasting and perforating device, hollow grouting anchor body, beehive-shaped charge, four major parts of framework of steel reinforcement；Construction method includes：1) equipment is prepared；2) measurement cloth eye；3) drill；4) borehole cleaning and inspection；5) anchor pole is squeezed into；6) stemming is blocked；7) detonate, 8) borehole cleaning；9) stop grouting plug is installed；10) slip casting；The present invention has blasting and perforating device in hollow grouting anchor body bottom welding, and equipped with igniting primer and the beehive-shaped charge for being mounted with detonator inside it, high-strength anchorage force can be provided immediately, in addition, by hollow grouting anchor tube chamber to Rock And Soil slip casting, the friction of big termination large area can be formed --- the comprehensive support system of embolism new type composity anchoring and grouting and reinforcing, significantly improve consolidation effect of the anchor pole to Rock And Soil.
Description
Technical field
Penetrated the present invention relates to a kind of hollow grouting anchor and its construction method, more particularly to a kind of cumulative with framework of steel reinforcement
Hole hollow grouting anchor and its construction method.
Background technology
Domestic and international deep mining practice have shown that, when mining depth reaches 800~1000m, some roadway deformation amounts are reachable
1000~1500mm is even more big, if taking effective support pattern not in time, will produce significant threat to production, safety.For
Acquisition good supporting effect, it is necessary to update the properity of support apparatus, instrument.
Hollow grouting anchor is a kind of conventional supporting tool, is buried in the earth formation, can be tightly chain by stratum
Together, the interaction of --- injecting cement paste --- hole wall rock mass power by anchor pole, transfers and improves the self-strength of Rock And Soil
And self-stable ability, improve by the stress state of anchoring Rock And Soil to make it stable, so as to reduce the deflection in tunnel.
However, hollow grouting anchor conventional at present, can hardly provide anchor force, or carry before injecting cement paste consolidation
The anchor force of confession is smaller, anchoring area is smaller etc., and they are in large mining depth high stress bolting with wire mesh, soft rock bolting with wire mesh and break up coal
It is difficult to be applicable in the application circumstances such as rock mass bolting with wire mesh.Therefore needing to develop one kind can immediately provide anchor force, anchoring
Power is big, bolt anchoring area is big, anchor pole is formed together with Rock And Soil built-up arch intensity hollow grouting anchor high, to ensure ore deposit
Well production safety is carried out.
The content of the invention
In order to overcome existing hollow grouting anchor, the anchor of anchor force or offer can hardly be provided before injecting cement paste consolidation
Gu power is smaller, anchoring area is smaller, the low weak point of built-up arch intensity that anchor pole is formed together with Rock And Soil, and the present invention is provided
A kind of jet perforating hollow grouting anchor with framework of steel reinforcement.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of jet perforating hollow grouting anchor with framework of steel reinforcement, including blasting and perforating device (1), hollow grouting anchor
Body (2), beehive-shaped charge (5), (6) four major part compositions of framework of steel reinforcement；
The blasting and perforating device (1) by axial end iron (19), fix bar (18), radially perforated casing (22), pellet (21),
Barb (23) and detonating medicine (20) are constituted, wherein, two pieces of axial end irons (19) are circular slab, and centre is provided with hole, can pass through
Fix bar (18)；Radially perforated casing (22) is cylindrical shape, is sandwiched between two pieces of axial end irons (19), and priming is placed with inside it
Product (20), are placed with pellet (21) in the shell hole in radially perforated casing (22)；Axial end iron (19), equipped with detonating medicine (20) and bullet
The radially perforated casing (22) of sub (21), barb (23) pass sequentially through screw and are fixed in fix bar (18), the hook of barb (23)
Set with axial end iron (19) opposite direction, and be welded on hollow grouting anchor body (2) bottom, i.e. blasting and perforating device (1) and be located at
Drilling bottom, is followed by hollow grouting anchor body (2)；
The hollow grouting anchor body (2) is both ends open, cylindrical cavity, on the tube wall of hollow grouting anchor body (2)
Two row circular ports (17) are provided with, two row circular ports are staggered, circular port (17) is extended to and made inside anchor pole cylinder projection
(9), for fixing beehive-shaped charge (5)；The bottom of hollow grouting anchor body (2) is provided with detonator (3) and igniting primer (4), its top
Stemming (11) is filled in end pipe chamber, and carries roof bolt plate (13) and anchor pole baffle ring (16) successively；
The detonator (3) is inserted in igniting primer (4), and is connected with detonator wire (15)；
The beehive-shaped charge (5) is made up of explosive and sockets for collecting energy (7), and wherein explosive is shaped as the group of cylinder and cone
Fit shape, sockets for collecting energy (7) is cone, and the cavity liner of same shape, each beehive-shaped charge are inlaid with sockets for collecting energy (7)
(5) linked together by primacord (8) between, and be connected with described blasting and perforating device (1) and igniting primer (4),
Primacord (8) sequentially passes through blasting and perforating device (1), igniting primer (4), beehive-shaped charge (5)；
The framework of steel reinforcement (6) is made up of stirrup (25), 4 radial direction reinforcing bars (26) and upper and lower two bar reinforcements (10), it
Between connected mode to be welded to connect, upper and lower two bar reinforcements (10) and radial direction reinforcing bar (26) are welded on stirrup (25),
The both sides of every bar reinforcement (10) are welded with two radial direction reinforcing bars (26), wherein, the length of radial direction reinforcing bar (26) is less than hollow
The length of grouted anchor bar body (2), the length of bar reinforcement (10) more than hollow grouting anchor body (2) length, its bottom with it is quick-fried
At grade, its top ends does screw thread treatment, through the bar reinforcement backing plate for the end of the fix bar (18) of broken perforating system (1)
(12) circular hole on, is fixed by fixing nut (14)；On framework of steel reinforcement (6) stirrup farthest apart from drill mouth with it is upper
Side bar reinforcement contact site is provided with the reinforcing rod (24) for tying up igniting primer；Apart from farthest one of drill mouth on framework of steel reinforcement (6)
Stirrup is welded on hollow grouting anchor body (2) inwall with upper and lower both sides bar reinforcement contact site, also will be upper at drilling orifice
Lower both sides bar reinforcement does soldering with hollow grouting anchor body (2) inwall；
A kind of construction method of the jet perforating hollow grouting anchor with framework of steel reinforcement in the present invention, including harder rock mass,
Soil body construction method, it is characterised in that：
The harder rock mass, soil body construction method, comprise the following steps：
1) prepare equipment, after drilling jumbo is in place, connect water supply, the power supply pipeline of drilling jumbo；2) measurement cloth eye, root
According to Soil Anchor Design spacing and rock mass, the layer reason and the distribution situation at joint of the soil body, eye position is marked with coating；For layer reason, section
Position is educated in haircut, should encrypt laying eye position；3) drill, anchor pole fixing hole is got out on the eye position for marking with drilling jumbo, drill
When drilling rod perpendicular to rock mass or the bed plane of the soil body；The size of bore diameter is relevant with the hardness of rock mass, the soil body, is ensureing to drill
In the case of with diameter greater than hollow grouting anchor body diameter, the bore diameter on rock mass takes greatly, and the bore diameter on the soil body takes
It is smaller, determined by testing, it is defined by smoothly squeezing into anchor pole；4) borehole cleaning and inspection, high pressure wind is passed through with elbow steel pipe
Aggregate chips and tiny stone in net anchor pole fixing hole；Check whether the hole depth of anchor pole fixing hole meets requirement；5) anchor pole, bottom are squeezed into
The hollow grouting anchor body that portion is welded with blasting and perforating device squeezes into anchor pole fixing hole, until reaching projected depth untill, detonator
It is outer that payment to a porter is retained in drilling；6) stemming is blocked, in this hollow grouting anchor plug at end part stemming；7) detonate, drawn by detonator wire
Quick-fried igniting primer, and then blasting and perforating device and each beehive-shaped charge are ignited by primacord；8) borehole cleaning, is passed through with elbow steel pipe
High-pressure blast blows off aggregate chips and tiny stone in anchor pole fixing hole, is beneficial to cement mortar and is fully contacted with palisades；9) install and stop
Slurry plug, stop grouting plug is installed in the afterbody of anchor pole, and roof bolt plate, anchor pole baffle ring, the bar reinforcement backing plate, fixed crude steel are then installed successively
The fixing nut of muscle；10) slip casting, cement mortar, the full anchor pole fixing hole of cement mortar, hollow note are injected by slip casting passage
Slurry anchor pole end is formed in a big cavity body and each circular CUMULATIVE BLASTING hole, and the injecting cement paste at each position is connected；
After slip casting is finished, blocked in time with Anchor Agent.
Operation principle：
The present invention is that have blasting and perforating device by hollow grouting anchor body bottom welding, and equipped with installation inside it
The igniting primer of detonator and beehive-shaped charge, igniting primer blast in anchor bar body, and then ignite blasting and perforating device and cumulative dress
Medicine；Blast produces strong effect to hollow grouting anchor wall, is plastically deformed the body of rod, causes bar wall radial dilatation to extrude rock
The soil body, after the recessed Rock And Soil of bar wall, can immediately provide a part of anchor force；Pellet after blasting and perforating device blast above it
With the energy-gathering jetting produced by beehive-shaped charge blast, pressure up to millions of atmospheric pressure, with high energy density, directly
Rock And Soil to the wall that drills produces huge impulsive force, and greatly effect of the reinforcing explosive charge to Rock And Soil is made into hole wall rock
The soil body is crushed；Beehive-shaped charge can form circular CUMULATIVE BLASTING by the circular port in hollow grouting anchor body in Rock And Soil
Hole；Blasting and perforating device can form a big cavity body in hollow grouting anchor end, and the shock wave for producing that explodes may be used also
Crotch shape is impacted into the bar reinforcement end on framework of steel reinforcement more than hollow grouting anchor body part, the crotch can also be immediately
A part of anchor force is provided；The anchor force that both the above is provided by hollow grouting anchor wall and bar reinforcement plastic deformation, Ke Yiyou
Effect prevents the relative slip of Rock And Soil and anchor pole, so as to reach the effect anchored at once to Rock And Soil；By blasting and perforating device
The cavity body of formation, and circular CUMULATIVE BLASTING hole, by hollow grouting anchor tube chamber to Rock And Soil slip casting, not only can be with slip casting
Rock And Soil is reinforced, and is filled in hollow grouting anchor tube chamber, blasting and perforating device cavity body and circular CUMULATIVE BLASTING hole
Injecting cement paste is connected, and forms anchoring.
Compared with prior art, it is an advantage of the invention that：
The present invention makes to exceed hollow slip casting anchor on the hollow grouting anchor body of rod and framework of steel reinforcement using the energy of explosive charge
The bar reinforcement end of shank portion is plastically deformed, and makes the recessed Rock And Soil of bar wall, and bar reinforcement end forms crotch, and then can be with
Powerful anchor force is provided immediately, the effect anchored at once to Rock And Soil is reached；Wherein, the reinforcing bar in hollow grouting anchor body
Frame, can improve the structural strength of injecting cement paste, strengthen the anchoring dynamics of anchor pole, extend the service life of anchor pole, hollow slip casting anchor
One piece of the embolism of injecting cement paste and each position inside bar, also increases the anchoring area of anchor pole；In circular CUMULATIVE BLASTING hole
Slip casting embolism changes anchoring load pass through mechanism together with hollow grouting anchor, forms friction --- embolism NEW TYPE OF COMPOSITE anchor
Gu and the comprehensive support system of grouting and reinforcing, significantly improve consolidation effect of the anchor pole to Rock And Soil；Blasting and perforating device shape
Into cavity body in slip casting embolism major part anchoring rod can be formed together with hollow grouting anchor, make original small area of contact
Conical funnel force structure be changed into the halfpace force structure of big termination large area, increase built-up arch thickness, it is whole so as to improve
Body supporting intensity.
Brief description of the drawings
Fig. 1 is diagrammatic cross-section of hollow grouting anchor of the invention；
Fig. 2 is hollow grouting anchor body schematic diagram of the invention；
Fig. 3 is blasting and perforating device schematic diagram of the invention；
Fig. 4 is explosive schematic diagram in beehive-shaped charge of the invention；
Fig. 5 is energy gathering cap schematic diagram in beehive-shaped charge of the invention；
Fig. 6 is the bar reinforcement backing plate schematic diagram of the invention；
Fig. 7 is framework of steel reinforcement schematic diagram of the invention；
Fig. 8 is reinforcing bar cross-sectional view of the invention；
Fig. 9 is bar reinforcement afterbod deformation schematic diagram in framework of steel reinforcement after explosion；
Figure 10 is the halfpace force structure schematic diagram of big termination large area of the invention；
Figure 11 is the conical funnel force structure schematic diagram of conventional tubular grouted anchor bar small area of contact；
Figure 12 is the halfpace force structure schematic diagram of big termination large area of the invention.
In Fig. 1：Blasting and perforating device -1, hollow grouting anchor body -2, detonator -3, igniting primer -4, cumulative dress
Medicine -5, framework of steel reinforcement -6, sockets for collecting energy -7, primacord -8, anchor pole inwall cylinder raised -9, bar reinforcement -10, stemming -
11, the bar reinforcement backing plate -12, roof bolt plate -13, fixing nut -14, detonator wire -15, anchor pole baffle ring -16；
In Fig. 2：Hollow grouting anchor body -2, framework of steel reinforcement -6, circular port -17；
In Fig. 3：Fix bar -18, hold iron -19, detonating medicine -20, pellet -21, perforated casing -22, barb -23；
In Fig. 7 and Fig. 9：Framework of steel reinforcement -6, tie up reinforcing rod -24 of igniting primer, stirrup -25, and radial direction reinforcing bar -
26；
In Figure 10：Injecting cement paste -27, Rock And Soil -28, slip casting embolism -29.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawings with specific embodiment pair
The present invention is described in further detail：
A kind of jet perforating hollow grouting anchor with framework of steel reinforcement, including blasting and perforating device (1), hollow grouting anchor
Body (2), beehive-shaped charge (5), (6) four major part compositions of framework of steel reinforcement；
The blasting and perforating device (1) by axial end iron (19), fix bar (18), radially perforated casing (22), pellet (21),
Barb (23) and detonating medicine (20) are constituted, wherein, two pieces of axial end irons (19) are circular slab, and centre is provided with hole, can pass through
Fix bar (18)；Radially perforated casing (22) is cylindrical shape, is sandwiched between two pieces of axial end irons (19), and priming is placed with inside it
Product (20), are placed with pellet (21) in the shell hole in radially perforated casing (22)；Axial end iron (19), equipped with detonating medicine (20) and bullet
The radially perforated casing (22) of sub (21), barb (23) pass sequentially through screw and are fixed in fix bar (18), the hook of barb (23)
Set with axial end iron (19) opposite direction, and be welded on hollow grouting anchor body (2) bottom, i.e. blasting and perforating device (1) and be located at
Drilling bottom, is followed by hollow grouting anchor body (2)；
The hollow grouting anchor body (2) is both ends open, cylindrical cavity, on the tube wall of hollow grouting anchor body (2)
Two row circular ports (17) are provided with, two row circular ports are staggered, circular port (17) is extended to and made inside anchor pole cylinder projection
(9), for fixing beehive-shaped charge (5)；The bottom of hollow grouting anchor body (2) is provided with detonator (3) and igniting primer (4), its top
Stemming (11) is filled in end pipe chamber, and carries roof bolt plate (13) and anchor pole baffle ring (16) successively；
The detonator (3) is inserted in igniting primer (4), and is connected with detonator wire (15)；
The beehive-shaped charge (5) is made up of explosive and sockets for collecting energy (7), and wherein explosive is shaped as the group of cylinder and cone
Fit shape, sockets for collecting energy (7) is cone, and the cavity liner of same shape, each beehive-shaped charge are inlaid with sockets for collecting energy (7)
(5) linked together by primacord (8) between, and be connected with described blasting and perforating device (1) and igniting primer (4),
Primacord (8) sequentially passes through blasting and perforating device (1), igniting primer (4), beehive-shaped charge (5)；
The framework of steel reinforcement (6) is made up of stirrup (25), 4 radial direction reinforcing bars (26) and upper and lower two bar reinforcements (10), on
Lower two bar reinforcements (10) and radial direction reinforcing bar (26) are welded on stirrup (25), and the both sides of every bar reinforcement (10) are welded with two
Root radial direction reinforcing bar (26), wherein, the length of the length less than hollow grouting anchor body (2) of radial direction reinforcing bar (26), bar reinforcement (10)
Length of the length more than hollow grouting anchor body (2), the end of the fix bar (18) of its bottom and blasting and perforating device (1)
At grade, its top ends do screw thread treatment, the circular hole through in the bar reinforcement backing plate (12), by fixing nut (14) come
It is fixed；A stirrup farthest apart from drill mouth is provided with upside bar reinforcement contact site and ties up igniting primer on framework of steel reinforcement (6)
Reinforcing rod (24)；A stirrup farthest apart from drill mouth is welded with upper and lower both sides bar reinforcement contact site on framework of steel reinforcement (6)
It is connected on hollow grouting anchor body (2) inwall, also by upper and lower both sides bar reinforcement and hollow grouting anchor body (2) at drilling orifice
Inwall does soldering；
A kind of construction method of the jet perforating hollow grouting anchor with framework of steel reinforcement in the present invention, including harder rock mass,
Soil body construction method, it is characterised in that：
The harder rock mass, soil body construction method, comprise the following steps：
1) prepare equipment, after drilling jumbo is in place, connect water supply, the power supply pipeline of drilling jumbo；2) measurement cloth eye, root
According to Soil Anchor Design spacing and rock mass, the layer reason and the distribution situation at joint of the soil body, eye position is marked with coating；For layer reason, section
Position is educated in haircut, should encrypt laying eye position；3) drill, anchor pole fixing hole is got out on the eye position for marking with drilling jumbo, drill
When drilling rod perpendicular to rock mass or the bed plane of the soil body；The size of bore diameter is relevant with the hardness of rock mass, the soil body, is ensureing to drill
In the case of with diameter greater than hollow grouting anchor body diameter, the bore diameter on rock mass takes greatly, and the bore diameter on the soil body takes
It is smaller, determined by testing, it is defined by smoothly squeezing into anchor pole；4) borehole cleaning and inspection, high pressure wind is passed through with elbow steel pipe
Aggregate chips and tiny stone in net anchor pole fixing hole；Check whether the hole depth of anchor pole fixing hole meets requirement；5) anchor pole, bottom are squeezed into
The hollow grouting anchor body that portion is welded with blasting and perforating device squeezes into anchor pole fixing hole, until reaching projected depth untill, detonator
It is outer that payment to a porter is retained in drilling；6) stemming is blocked, in this hollow grouting anchor plug at end part stemming；7) detonate, drawn by detonator wire
Quick-fried igniting primer, and then blasting and perforating device and each beehive-shaped charge are ignited by primacord；8) borehole cleaning, is passed through with elbow steel pipe
High-pressure blast blows off aggregate chips and tiny stone in anchor pole fixing hole, is beneficial to cement mortar and is fully contacted with palisades；9) install and stop
Slurry plug, stop grouting plug is installed in the afterbody of anchor pole, and roof bolt plate, anchor pole baffle ring, the bar reinforcement backing plate, fixed crude steel are then installed successively
The fixing nut of muscle；10) slip casting, cement mortar, the full anchor pole fixing hole of cement mortar, hollow note are injected by slip casting passage
Slurry anchor pole end is formed in a big cavity body and each circular CUMULATIVE BLASTING hole, and the injecting cement paste at each position is connected；
After slip casting is finished, blocked in time with Anchor Agent.
The course of work of the invention is illustrated with reference to accompanying drawing：
As shown in figure 1, beehive-shaped charge (5) is placed on the circular port (17) in hollow grouting anchor body (2) Nei, primacord
(8) blasting and perforating device (1), igniting primer (4) and each beehive-shaped charge (5) are sequentially connected, detonator (3) is inserted into priming
In bag (4) and it is connected with detonator wire (15)；Rock And Soil is set by design requirement is drilled, by blasting and perforating device (1) and outward
Footpath 1~2mm hollow grouting anchor bodies (2) smaller than boring aperture are headed into drilling, then, on hollow grouting anchor body (2) top
Filling stemming (11) in tube chamber；
Using detonator (3) ignite igniting primer (4), then by primacord (8) ignite blasting and perforating device (1) and each
Beehive-shaped charge (5), detonation gas orders about hollow grouting anchor body (2) and bar reinforcement (10) afterbody is plastically deformed, hollow note
Slurry anchor bar body (2) radial dilatation squeezes into Rock And Soil, and bar reinforcement (10) afterbody produces crotch, and this just can immediately provide anchor force,
The relative slip of Rock And Soil (28) and anchor pole is prevented, so as to reach the purpose for anchoring at once；
Meanwhile, the cumulative produced by pellet and beehive-shaped charge (5) blast after blasting and perforating device (1) blast above it is penetrated
Stream, up to millions of atmospheric pressure, with high energy density, directly the Rock And Soil generation to the wall that drills is huge for pressure
Impulsive force, crushes hole wall Rock And Soil greatly effect of the reinforcing explosive charge to Rock And Soil, and beehive-shaped charge passes through hollow note
Circular port on slurry anchor bar body (2), can form circle CUMULATIVE BLASTING hole in Rock And Soil, and blasting and perforating device (1) can be
Hollow grouting anchor body (2) end forms a big cavity body；
As shown in Figure 10, borehole cleaning treatment is carried out to the drilling after explosion, with elbow steel pipe be passed through high-pressure blast blow off anchor pole consolidate
Determine the aggregate chips and tiny stone in hole, and load onto stop grouting plug, roof bolt plate (13), anchor pole baffle ring (16), the bar reinforcement backing plate successively
(12), the fixing nut (14) of fixed bar reinforcement, holds by the circular CUMULATIVE BLASTING hole and hollow grouting anchor body (2) that are formed
The big cavity body in portion, by hollow grouting anchor body (2) tube chamber to Rock And Soil (28) slip casting, wherein, hollow grouting anchor body (2)
In framework of steel reinforcement (6), can improve the structural strength of injecting cement paste, strengthen the anchoring dynamics of anchor pole, extend the use longevity of anchor pole
Life, one piece of the embolism of injecting cement paste and each position inside hollow grouting anchor, also increases the anchoring area of anchor pole；Circle is poly-
Slip casting embolism in energy blast hole changes anchoring load pass through mechanism together with hollow grouting anchor body (2), and formation rubs
Wipe --- the comprehensive support system of embolism new type composity anchoring and grouting and reinforcing, significantly improve reinforcing of the anchor pole to Rock And Soil
Effect；The slip casting embolism in cavity body that blasting and perforating device (1) is formed can form major part anchor together with hollow grouting anchor
Gu anchor pole, makes the conical funnel force structure (as shown in figure 11) of original small area of contact be changed into the halfpace of big termination large area and receives
This increases built-up arch thickness to power structure (as shown in figure 12), so as to improve integer support intensity.
Claims (4)
1. a kind of jet perforating hollow grouting anchor with framework of steel reinforcement, including blasting and perforating device (1), hollow grouting anchor body
(2), beehive-shaped charge (5), (6) four major parts of framework of steel reinforcement, it is characterized in that：The blasting and perforating device (1) is by axial end
Iron (19), fix bar (18), radially perforated casing (22), pellet (21), barb (23) and detonating medicine (20) composition, wherein, two
Block axial end iron (19) is circular slab, and centre is provided with hole, can be by fix bar (18)；Radially perforated casing (22) is cylindrical shape,
It is sandwiched between two pieces of axial end irons (19), detonating medicine (20) is placed with inside it, is put in the shell hole in radially perforated casing (22)
There is pellet (21)；Axial end iron (19), the radially perforated casing (22) equipped with detonating medicine (20) and pellet (21), barb (23) according to
Secondary to be fixed in fix bar (18) by screw, hook and axial end iron (19) opposite direction of barb (23) are set, and are welded on
Hollow grouting anchor body (2) bottom, i.e. blasting and perforating device (1) are followed by hollow grouting anchor body (2) positioned at drilling bottom；
The framework of steel reinforcement (6) is made up of stirrup (25), 4 radial direction reinforcing bars (26) and upper and lower two bar reinforcements (10), and upper and lower two thick
Reinforcing bar (10) and radial direction reinforcing bar (26) are welded on stirrup (25), and the both sides of every bar reinforcement (10) are welded with two radial direction steel
Muscle (26), wherein, the length of the length less than hollow grouting anchor body (2) of radial direction reinforcing bar (26), the length of bar reinforcement (10) is big
In the length of hollow grouting anchor body (2), its bottom is put down with the end of the fix bar (18) of blasting and perforating device (1) same
On face, its top ends does screw thread treatment, and the circular hole through in the bar reinforcement backing plate (12) is fixed by fixing nut (14)；
A stirrup farthest apart from drill mouth is provided with the reinforcing bar for tying up igniting primer with upside bar reinforcement contact site on framework of steel reinforcement (6)
Bar (24)；A stirrup farthest apart from drill mouth is welded on hollow with upper and lower both sides bar reinforcement contact site on framework of steel reinforcement (6)
On grouted anchor bar body (2) inwall, also upper and lower both sides bar reinforcement is welded with hollow grouting anchor body (2) inwall at drilling orifice
Connect treatment.
2. a kind of jet perforating hollow grouting anchor with framework of steel reinforcement according to claim 1, it is characterized in that：In described
Empty grouted anchor bar body (2) is both ends open, cylindrical cavity, and two row circular ports are provided with the tube wall of hollow grouting anchor body (2)
(17), two row circular ports are staggered, and circular port (17) is extended to and made inside anchor pole cylinder projection (9), for fixing cumulative
Powder charge (5)；The bottom of hollow grouting anchor body (2) is provided with detonator (3) and igniting primer (4), and stemming (11) is filled on its top, and
Roof bolt plate (13) and anchor pole baffle ring (16) are carried successively.
3. a kind of jet perforating hollow grouting anchor with framework of steel reinforcement according to claim 2, it is characterized in that：The thunder
Pipe (3) is inserted in igniting primer (4), and is connected with detonator wire (15), and beehive-shaped charge (5) is made up of explosive and sockets for collecting energy (7), its
Middle explosive is shaped as the combination bodily form of cylinder and cone, and sockets for collecting energy (7) is cone, and sockets for collecting energy is inlaid with and it in (7)
The cavity liner of same shape, is linked together, and penetrated with described explosion between each beehive-shaped charge (5) by primacord (8)
Aperture apparatus (1) are connected with igniting primer (4), and primacord (8) sequentially passes through blasting and perforating device (1), igniting primer (4), gathers
Can powder charge (5).
4. a kind of construction method of the jet perforating hollow grouting anchor with framework of steel reinforcement based on described in claim 3, including
Harder rock mass, soil body construction method, it is characterised in that：The harder rock mass, soil body construction method, comprise the following steps：1) it is accurate
Standby equipment, after drilling jumbo is in place, connects water supply, the power supply pipeline of drilling jumbo；2) measurement cloth eye, according between Soil Anchor Design
Away from and rock mass, the soil body layer reason and joint distribution situation, with coating mark eye position；For layer reason, joint development position, should
Eye position is laid in encryption；3) drill, anchor pole fixing hole is got out on the eye position for marking with drilling jumbo, drilling rod is perpendicular to rock during drilling
The bed plane of body or the soil body；The size of bore diameter is relevant with the hardness of rock mass, the soil body, is ensureing bore diameter more than hollow note
Slurry anchor bar body diameter in the case of, the bore diameter on rock mass takes greatly, the bore diameter on the soil body take it is smaller, by test
To determine, it is defined by smoothly squeezing into anchor pole；4) borehole cleaning and inspection, are passed through during high-pressure blast blows off anchor pole fixing hole with elbow steel pipe
Aggregate chips and tiny stone；Check whether the hole depth of anchor pole fixing hole meets requirement；5) anchor pole is squeezed into, bottom welding has blasting and perforating
The hollow grouting anchor body of device squeezes into anchor pole fixing hole, until reaching projected depth untill, it is outer that detonator wire is retained in drilling；
6) stemming is blocked, in this hollow grouting anchor plug at end part stemming；7) detonate, igniting primer, Jin Ertong are ignited by detonator wire
Cross primacord and ignite blasting and perforating device and each beehive-shaped charge；8) borehole cleaning, with elbow steel pipe be passed through high-pressure blast blow off anchor pole consolidate
Determine the aggregate chips and tiny stone in hole, be beneficial to cement mortar and be fully contacted with palisades；9) stop grouting plug is installed, in the afterbody of anchor pole
Stop grouting plug is installed, then roof bolt plate, anchor pole baffle ring, the bar reinforcement backing plate, the fixing nut of fixed bar reinforcement are installed successively；
10) slip casting, cement mortar is injected by slip casting passage, and the full anchor pole fixing hole of cement mortar, hollow grouting anchor end are formed
In one big cavity body and each circular CUMULATIVE BLASTING hole, the injecting cement paste at each position is connected；After slip casting is finished, anchor is used
Gu agent is blocked in time.
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| CN201410598954.7A CN104295309B (en) | 2014-10-30 | 2014-10-30 | A kind of jet perforating hollow grouting anchor and its construction method with framework of steel reinforcement |
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Families Citing this family (7)
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| CN104832199A (en) * | 2015-04-30 | 2015-08-12 | 广西大学 | Anchor rod and anchoring method adopting anchor rod |
| KR101757975B1 (en) * | 2015-06-25 | 2017-07-13 | 서동현 | Anchor having a fixing device at a side of pressure plate to depress the land slope and method of installing the same |
| CN107620603B (en) * | 2017-09-26 | 2023-09-22 | 中国矿业大学 | Novel grouting anchor rod with steel loop bar |
| CN107558470A (en) * | 2017-10-11 | 2018-01-09 | 安徽理工大学 | A kind of new grouted anchor bar and construction method with the adjustable wing |
| CN112943326B (en) * | 2021-03-16 | 2022-11-25 | 太原理工大学 | Automatic anchor drill device |
| CN114542146B (en) * | 2022-03-29 | 2024-04-26 | 嵩县金牛有限责任公司 | Roof protection method for underground mine blasting |
| CN114719697B (en) * | 2022-04-22 | 2023-12-15 | 湖南楚湘建设工程集团有限公司 | Blasting device, blasting system and blasting method based on self-advancing anchor rod |
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