CN104295309A - Energy-gathered perforation hollow grouting anchor with reinforcement framework and construction method thereof - Google Patents
Energy-gathered perforation hollow grouting anchor with reinforcement framework and construction method thereof Download PDFInfo
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- CN104295309A CN104295309A CN201410598954.7A CN201410598954A CN104295309A CN 104295309 A CN104295309 A CN 104295309A CN 201410598954 A CN201410598954 A CN 201410598954A CN 104295309 A CN104295309 A CN 104295309A
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- hollow grouting
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- anchor
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- 230000002787 reinforcement Effects 0.000 title claims abstract description 80
- 238000010276 construction Methods 0.000 title claims abstract description 14
- 238000005422 blasting Methods 0.000 claims abstract description 49
- 239000002689 soil Substances 0.000 claims abstract description 49
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 17
- 238000005553 drilling Methods 0.000 claims abstract description 13
- 238000009826 distribution Methods 0.000 claims abstract description 4
- 238000007689 inspection Methods 0.000 claims abstract description 4
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 239000011435 rock Substances 0.000 claims description 48
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 36
- 238000007569 slipcasting Methods 0.000 claims description 17
- 229910052742 iron Inorganic materials 0.000 claims description 15
- 239000004568 cement Substances 0.000 claims description 12
- 239000008188 pellet Substances 0.000 claims description 11
- 230000001186 cumulative effect Effects 0.000 claims description 10
- 239000002360 explosive Substances 0.000 claims description 10
- 235000020004 porter Nutrition 0.000 claims description 10
- 239000011083 cement mortar Substances 0.000 claims description 9
- 239000003814 drug Substances 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000004575 stone Substances 0.000 claims description 7
- 238000004880 explosion Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000003466 welding 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
- 238000013461 design Methods 0.000 claims description 3
- 238000011161 development Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000004873 anchoring Methods 0.000 abstract description 19
- 238000005474 detonation Methods 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 239000011440 grout Substances 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 208000005189 Embolism Diseases 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000007596 consolidation process Methods 0.000 description 4
- 238000005065 mining Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 208000032837 Ring chromosome 16 syndrome Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000012546 transfer Methods 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
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- 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 an energy-gathered perforation hollow grouting anchor with a reinforcement framework. The energy-gathered perforation hollow grouting anchor comprises a blasting perforation device, a hollow grouting anchor body, shaped charge and the reinforcement framework. The construction method comprises the steps of (1) equipment preparation, (2) measurement and hole distribution, (3) hole drilling, (4) hole clearing and inspection, (5) built-in of the blasting perforation device and the anchor body, (6) stemming blocking, (7) detonation, (8) hole clearing, (9) grout stop plug installation and (10) grouting. The blasting perforation device is welded to the bottom of the hollow grouting anchor body, an igniting primer with a detonator and the shaped charge are mounted in the hollow grouting anchor body, and high-strength anchoring force can be provided instantly; in addition, a tube cavity of the hollow grouting anchor is used for carrying out grouting on rock-soil bodies, a large-end and large-area friction-plugging novel combined anchoring and grouting reinforcement comprehensive support system can be formed, and the reinforcing effect of the anchor on the rock-soil bodies is greatly improved.
Description
Technical field
The present invention relates to a kind of hollow grouting anchor and construction method thereof, particularly relate to a kind of jet perforating hollow grouting anchor with cage of reinforcement and construction method thereof.
Background technology
The practice of domestic and international deep mining shows, when mining depth reaches 800 ~ 1000m, it is even larger that some roadway deformation amount can reach 1000 ~ 1500mm, if take effective support pattern not in time, will produce significant threat to production, safety.In order to obtain good supporting effect, just need the properity updating support apparatus, instrument.
Hollow grouting anchor is a kind of conventional supporting tool, buried underground in the earth formation, stratum can be chained together tightly, the interaction of---injecting cement paste---hole wall rock mass power of passing through anchor pole, transfer and improve self-strength and the self-stable ability of Rock And Soil, improve by the stress state of anchoring Rock And Soil to make it stable, thus reduce the deflection in tunnel.
But, hollow grouting anchor conventional at present, almost anchored force can not be provided before injecting cement paste consolidation, or the anchored force provided is less, anchoring area is less, they are difficult to be suitable in the application circumstances such as the heavily stressed bolting with wire mesh of large mining depth, soft rock bolting with wire mesh and fractured coal and rock bolting with wire mesh.Therefore need to develop a kind of hollow grouting anchor that large, the anchor rod anchored area of anchored force, anchored force is large, anchor pole is formed together with Rock And Soil built-up arch intensity can be provided immediately high, to ensure that shaft production carries out safely.
Summary of the invention
In order to overcome existing hollow grouting anchor, almost can not provide before injecting cement paste consolidation anchored force or the anchored force that provides less, anchoring area is less, the weak points such as the built-up arch intensity that anchor pole is formed together with Rock And Soil is low, the invention provides a kind of jet perforating hollow grouting anchor with cage of reinforcement.
The technical solution adopted for the present invention to solve the technical problems is:
With a jet perforating hollow grouting anchor for cage of reinforcement, comprise blasting and perforating device (1), hollow grouting anchor body (2), beehive-shaped charge (5), cage of reinforcement (6) four major part compositions;
Described blasting and perforating device (1) is made up of axial end iron (19), fixed bar (18), radial perforated casing (22), pellet (21), barb (23) and the medicine that detonates (20), wherein, two pieces of axial end iron (19) are circular slab, centre has hole, can pass through fixed bar (18); Radial perforated casing (22) is cylindrical shape, and be sandwiched between two pieces of axial end iron (19), its inside is placed with the medicine that detonates (20), is placed with pellet (21) in the shell hole on radial perforated casing (22); Axial end iron (19), the radial perforated casing (22) that the medicine that detonates (20) and pellet (21) are housed, barb (23) are fixing to be successively fixed on fixed bar (18) by screw, the hook of barb (23) and axial end iron (19) are arranged in the other direction, and be welded on hollow grouting anchor body (2) bottom, namely blasting and perforating device (1) is positioned at boring bottom, is thereafter hollow grouting anchor body (2);
Described hollow grouting anchor body (2) is both ends open, cylindrical cavity, the tube wall of hollow grouting anchor body (2) has two row circular ports (17), two row circular ports are crisscross arranged, circular port (17) extends to anchor pole inside and makes 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), fill stemming (11) in its top tube chamber, and work as ring (16) with roof bolt plate (13) and anchor pole successively;
Described detonator (3) inserts in igniting primer (4), and is connected with detonator payment to a porter (15);
Described beehive-shaped charge (5) is made up of explosive and sockets for collecting energy (7), wherein explosive shape is the combination bodily form of cylinder and cone, sockets for collecting energy (7) is conical, the cavity liner with its same shape is inlaid with in sockets for collecting energy (7), linked together by detonating fuse (8) between each beehive-shaped charge (5), and be connected with igniting primer (4) with described blasting and perforating device (1), detonating fuse (8) is successively through blasting and perforating device (1), igniting primer (4), beehive-shaped charge (5);
Described cage of reinforcement (6) is by stirrup (25), 4 radial reinforcing bars (26) and upper and lower two bar reinforcements (10) composition, connected mode between them is for being welded to connect, upper and lower two bar reinforcements (10) and radial reinforcing bar (26) are welded on stirrup (25), the both sides of every root bar reinforcement (10) are welded with two radial reinforcing bars (26), wherein, the length of radial reinforcing bar (26) is less than the length of hollow grouting anchor body (2), the length of bar reinforcement (10) is greater than the length of hollow grouting anchor body (2), the end of the fixed bar (18) of its bottom and blasting and perforating device (1) at grade, its top ends does screw thread process, through the circular hole on bar reinforcement backing plate (12), fixed by hold-down nut (14), mouth individual stirrup is farthest bored and bar reinforcement contact site, upside is provided with the reinforcement bar (24) tying up igniting primer in the upper distance of cage of reinforcement (6), the upper distance of cage of reinforcement (6) bores mouth individual stirrup farthest and bar reinforcement contact site, upper and lower both sides is welded on hollow grouting anchor body (2) inwall, also upper and lower both sides bar reinforcement and hollow grouting anchor body (2) inwall is done soldering at drilling orifice place,
A kind of construction method of the jet perforating hollow grouting anchor with cage of reinforcement in the present invention, comprises comparatively hard rock body, soil body construction method, it is characterized in that:
Described comparatively hard rock body, soil body construction method, comprise the following steps:
1) preparation machine, after drilling jumbo is in place, connects the water supply of jumbo, for electric line; 2) measure cloth eye, according to Soil Anchor Design spacing and rock mass, the bedding of the soil body and the distribution situation at joint, mark eye position with coating; For bedding, joints development position, should encrypt and lay eye position; 3) hole, get out anchor pole fixing hole with drilling jumbo on the eye position marked, during boring, drilling rod is perpendicular to the bed plane of rock mass or the soil body; The size of bore diameter is relevant with the hardness of Rock And Soil, when ensureing that bore diameter is greater than hollow grouting anchor body diameter, the bore diameter on rock mass is got greatly, and the bore diameter on the soil body is got smaller, determine by experiment, be as the criterion to squeeze into anchor pole smoothly; 4) clear hole and inspection, passes into high-pressure blast with elbow steel pipe and blows off aggregate chips in anchor pole fixing hole and tiny stone; Check whether the hole depth of anchor pole fixing hole meets the demands; 5) squeeze into blast perforating system and anchor pole, bottom welding has the hollow grouting anchor body of blasting and perforating device to squeeze into anchor pole fixing hole, until reach projected depth, detonator payment to a porter is retained in outside boring; 6) shutoff stemming, at this hollow grouting anchor plug at end part stemming; 7) detonate, ignite igniting primer by detonator payment to a porter, and then penetrate control device and each beehive-shaped charge by detonating fuse ignition explosion; 8) clear hole, passes into high-pressure blast with elbow steel pipe and blows off aggregate chips in anchor pole fixing hole and tiny stone, be beneficial to cement mortar and fully contact with crag; 9) stop grouting plug is installed, at the afterbody of anchor pole, stop grouting plug is installed, then the hold-down nut of skyhook backing plate, anchor pole baffle ring, bar reinforcement backing plate, fixing bar reinforcement successively; 10) slip casting, inject cement mortar by slip casting passage, cement mortar fills anchor pole fixing hole, hollow grouting anchor end formed in a large cavity body and each circular CUMULATIVE BLASTING hole, the injecting cement paste at each position is connected; After slip casting, with the timely shutoff of Anchor Agent.
Operating principle:
The present invention is by having blasting and perforating device at hollow grouting anchor body bottom welding, and the igniting primer and beehive-shaped charge of having installed detonator are housed therein, igniting primer blast in anchor bar body, and then ignites blasting and perforating device and beehive-shaped charge; Explode to hollow grouting anchor wall generation strong effect, make body of rod generation plastic strain, cause bar wall radial dilatation to extrude Rock And Soil, after the recessed Rock And Soil of bar wall, a part of anchored force can be provided immediately; Pellet after blasting and perforating device explosion above it and beehive-shaped charge are exploded the energy-gathering jetting produced, pressure can reach millions of atmospheric pressure, there is high energy density, directly huge impact force being produced to the Rock And Soil of boring wall, by greatly strengthening the effect of explosive charge to Rock And Soil, hole wall Rock And Soil being pulverized; Beehive-shaped charge, by the circular port on hollow grouting anchor body, can form circular CUMULATIVE BLASTING hole in Rock And Soil; Blasting and perforating device can form a large cavity body in hollow grouting anchor end, the shock wave that blast produces can also impact embayment hook-type cage of reinforcement exceeding the bar reinforcement end that hollow grouting anchor body divides, and this crotch also can provide a part of anchored force immediately; Above two kinds of anchored force provided by hollow grouting anchor wall and bar reinforcement plastic strain, effectively can stop the relative sliding of Rock And Soil and anchor pole, thus reach the effect to Rock And Soil anchoring at once; By the cavity body that blasting and perforating device is formed, and circular CUMULATIVE BLASTING hole, by hollow grouting anchor tube chamber to Rock And Soil slip casting, not only can grouting and reinforcing Rock And Soil, and the injecting cement paste be filled in hollow grouting anchor tube chamber, blasting and perforating device cavity body and circular CUMULATIVE BLASTING hole is connected, form anchoring.
Compared with prior art, advantage of the present invention is:
The present invention utilizes the energy of explosive charge, make the hollow grouting anchor body of rod and cage of reinforcement exceed the bar reinforcement end that hollow grouting anchor body divides and plastic strain occurs, make the recessed Rock And Soil of bar wall, bar reinforcement end forms crotch, and then powerful anchored force can be provided immediately, reach the effect to Rock And Soil anchoring at once; Wherein, the cage of reinforcement in hollow grouting anchor body, can improve the structural strength of injecting cement paste, strengthen the anchoring dynamics of anchor pole, extend the application life of anchor pole, the injecting cement paste of hollow grouting anchor inside and one piece, the embolism at each position, also increase the anchoring area of anchor pole; Slip casting embolism in circular CUMULATIVE BLASTING hole, together with hollow grouting anchor, changes anchoring load pass through mechanism, forms friction---and the comprehensive support system of the anchoring of embolism NEW TYPE OF COMPOSITE and grouting and reinforcing, significantly improves the consolidation effect of anchor pole to Rock And Soil; Slip casting embolism in the cavity body that blasting and perforating device is formed can form major part anchoring rod together with hollow grouting anchor, the conical funnel force structure of original small area of contact is made to become the large-area halfpace force structure in large termination, increase built-up arch thickness, thus improve integer support intensity.
Accompanying drawing explanation
Fig. 1 is hollow grouting anchor generalized section of the present invention;
Fig. 2 is blasting and perforating device schematic diagram of the present invention;
Fig. 3 be hollow grouting anchor body of the present invention and with bar reinforcement position relationship schematic diagram;
Fig. 4 is explosive and energy gathering cap schematic diagram in beehive-shaped charge of the present invention;
Fig. 5 is bar reinforcement backing plate schematic diagram of the present invention;
Fig. 6 is cage of reinforcement side direction of the present invention and cross sectional representation thereof;
Fig. 7 is that after explosion, in cage of reinforcement, bar reinforcement afterbody is out of shape schematic diagram;
Fig. 8 is slip casting embolism structure schematic diagram of the present invention;
Fig. 9 is the conical funnel force structure schematic diagram of traditional hollow grouting anchor small area of contact;
Figure 10 is large termination of the present invention large-area halfpace force structure schematic diagram.
In Fig. 1: blasting and perforating device-1, hollow grouting anchor body-2, detonator-3, igniting primer-4, beehive-shaped charge-5, cage of reinforcement-6, sockets for collecting energy-7, detonating fuse-8, anchor pole inwall cylinder protruding-9, bar reinforcement-10, stemming-11, bar reinforcement backing plate-12, roof bolt plate-13, hold-down nut-14, detonator payment to a porter-15, anchor pole baffle ring-16;
In Fig. 2: hollow grouting anchor body-2, cage of reinforcement-6, circular port-17;
In Fig. 3: fixed bar-18, end iron-19, medicine-20 of detonating, pellet-21, perforated casing-22, barb-23;
In Fig. 6 and Fig. 7: cage of reinforcement-6, tie up reinforcement bar-24 of igniting primer, stirrup-25, radial reinforcing bar-26;
In Fig. 8: injecting cement paste-27, Rock And Soil-28, slip casting embolism-29.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail:
With a jet perforating hollow grouting anchor for cage of reinforcement, comprise blasting and perforating device (1), hollow grouting anchor body (2), beehive-shaped charge (5), cage of reinforcement (6) four major part compositions;
Described blasting and perforating device (1) is made up of axial end iron (19), fixed bar (18), radial perforated casing (22), pellet (21), barb (23) and the medicine that detonates (20), wherein, two pieces of axial end iron (19) are circular slab, centre has hole, can pass through fixed bar (18); Radial perforated casing (22) is cylindrical shape, and be sandwiched between two pieces of axial end iron (19), its inside is placed with the medicine that detonates (20), is placed with pellet (21) in the shell hole on radial perforated casing (22); Axial end iron (19), the radial perforated casing (22) that the medicine that detonates (20) and pellet (21) are housed, barb (23) are fixing to be successively fixed on fixed bar (18) by screw, the hook of barb (23) and axial end iron (19) are arranged in the other direction, and be welded on hollow grouting anchor body (2) bottom, namely blasting and perforating device (1) is positioned at boring bottom, is thereafter hollow grouting anchor body (2);
Described hollow grouting anchor body (2) is both ends open, cylindrical cavity, the tube wall of hollow grouting anchor body (2) has two row circular ports (17), two row circular ports are crisscross arranged, circular port (17) extends to anchor pole inside and makes 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), fill stemming (11) in its top tube chamber, and work as ring (16) with roof bolt plate (13) and anchor pole successively;
Described detonator (3) inserts in igniting primer (4), and is connected with detonator payment to a porter (15);
Described beehive-shaped charge (5) is made up of explosive and sockets for collecting energy (7), wherein explosive shape is the combination bodily form of cylinder and cone, sockets for collecting energy (7) is conical, the cavity liner with its same shape is inlaid with in sockets for collecting energy (7), linked together by detonating fuse (8) between each beehive-shaped charge (5), and be connected with igniting primer (4) with described blasting and perforating device (1), detonating fuse (8) is successively through blasting and perforating device (1), igniting primer (4), beehive-shaped charge (5);
Described cage of reinforcement (6) is by stirrup (25), 4 radial reinforcing bars (26) and upper and lower two bar reinforcements (10) composition, upper and lower two bar reinforcements (10) and radial reinforcing bar (26) are welded on stirrup (25), the both sides of every root bar reinforcement (10) are welded with two radial reinforcing bars (26), wherein, the length of radial reinforcing bar (26) is less than the length of hollow grouting anchor body (2), the length of bar reinforcement (10) is greater than the length of hollow grouting anchor body (2), the end of the fixed bar (18) of its bottom and blasting and perforating device (1) at grade, its top ends does screw thread process, through the circular hole on bar reinforcement backing plate (12), fixed by hold-down nut (14), mouth individual stirrup is farthest bored and bar reinforcement contact site, upside is provided with the reinforcement bar (24) tying up igniting primer in the upper distance of cage of reinforcement (6), the upper distance of cage of reinforcement (6) bores mouth individual stirrup farthest and bar reinforcement contact site, upper and lower both sides is welded on hollow grouting anchor body (2) inwall, also upper and lower both sides bar reinforcement and hollow grouting anchor body (2) inwall is done soldering at drilling orifice place,
A kind of construction method of the jet perforating hollow grouting anchor with cage of reinforcement in the present invention, comprises comparatively hard rock body, soil body construction method, it is characterized in that:
Described comparatively hard rock body, soil body construction method, comprise the following steps:
1) preparation machine, after drilling jumbo is in place, connects the water supply of jumbo, for electric line; 2) measure cloth eye, according to Soil Anchor Design spacing and rock mass, the bedding of the soil body and the distribution situation at joint, mark eye position with coating; For bedding, joints development position, should encrypt and lay eye position; 3) hole, get out anchor pole fixing hole with drilling jumbo on the eye position marked, during boring, drilling rod is perpendicular to the bed plane of rock mass or the soil body; The size of bore diameter is relevant with the hardness of Rock And Soil, when ensureing that bore diameter is greater than hollow grouting anchor body diameter, the bore diameter on rock mass is got greatly, and the bore diameter on the soil body is got smaller, determine by experiment, be as the criterion to squeeze into anchor pole smoothly; 4) clear hole and inspection, passes into high-pressure blast with elbow steel pipe and blows off aggregate chips in anchor pole fixing hole and tiny stone; Check whether the hole depth of anchor pole fixing hole meets the demands; 5) squeeze into blast perforating system and anchor pole, bottom welding has the hollow grouting anchor body of blasting and perforating device to squeeze into anchor pole fixing hole, until reach projected depth, detonator payment to a porter is retained in outside boring; 6) shutoff stemming, at this hollow grouting anchor plug at end part stemming; 7) detonate, ignite igniting primer by detonator payment to a porter, and then penetrate control device and each beehive-shaped charge by detonating fuse ignition explosion; 8) clear hole, passes into high-pressure blast with elbow steel pipe and blows off aggregate chips in anchor pole fixing hole and tiny stone, be beneficial to cement mortar and fully contact with crag; 9) stop grouting plug is installed, at the afterbody of anchor pole, stop grouting plug is installed, then the hold-down nut of skyhook backing plate, anchor pole baffle ring, bar reinforcement backing plate, fixing bar reinforcement successively; 10) slip casting, inject cement mortar by slip casting passage, cement mortar fills anchor pole fixing hole, hollow grouting anchor end formed in a large cavity body and each circular CUMULATIVE BLASTING hole, the injecting cement paste at each position is connected; After slip casting, with the timely shutoff of Anchor Agent.
By reference to the accompanying drawings the course of work of the present invention is described:
As shown in Figure 1, beehive-shaped charge (5) is placed in the circular port (17) on hollow grouting anchor body (2), detonating fuse (8) connects blasting and perforating device (1), igniting primer (4) and each beehive-shaped charge (5) successively, and detonator (3) to be inserted in igniting primer (4) and to be connected with detonator payment to a porter (15); By designing requirement, boring is arranged to Rock And Soil, blasting and perforating device (1) and external diameter are headed in boring than boring aperture little 1 ~ 2mm hollow grouting anchor body (2), then, in the tube chamber of hollow grouting anchor body (2) top, stemming (11) is filled;
Detonator (3) is utilized to ignite igniting primer (4), then blasting and perforating device (1) and each beehive-shaped charge (5) is ignited by detonating fuse (8), detonation gas orders about hollow grouting anchor body (2) and bar reinforcement (10) afterbody generation plastic strain, hollow grouting anchor body (2) radial dilatation squeezes into Rock And Soil, bar reinforcement (10) afterbody produces crotch, this just can provide anchored force immediately, stop the relative sliding of Rock And Soil (28) and anchor pole, thus reach the object of anchoring at once;
Simultaneously, pellet after blasting and perforating device (1) blast above it and beehive-shaped charge (5) are exploded the energy-gathering jetting produced, pressure can reach millions of atmospheric pressure, there is high energy density, directly huge impact force is produced to the Rock And Soil of boring wall, by greatly strengthening the effect of explosive charge to Rock And Soil, hole wall Rock And Soil is pulverized, beehive-shaped charge is by the circular port on hollow grouting anchor body (2), circular CUMULATIVE BLASTING hole can be formed in Rock And Soil, blasting and perforating device (1) can form a large cavity body in hollow grouting anchor body (2) end,
As shown in Figure 8, hole process is clearly carried out to the boring after explosion, pass into high-pressure blast with elbow steel pipe and blow off aggregate chips in anchor pole fixing hole and tiny stone, and load onto stop grouting plug successively, roof bolt plate (13), anchor pole baffle ring (16), bar reinforcement backing plate (12), the hold-down nut (14) of fixing bar reinforcement, by the large cavity body in the circular CUMULATIVE BLASTING hole formed and hollow grouting anchor body (2) end, by hollow grouting anchor body (2) tube chamber to Rock And Soil (28) slip casting, wherein, cage of reinforcement (6) in hollow grouting anchor body (2), the structural strength of injecting cement paste can be improved, strengthen the anchoring dynamics of anchor pole, extend the application life of anchor pole, the injecting cement paste of hollow grouting anchor inside and one piece, the embolism at each position, also increase the anchoring area of anchor pole, slip casting embolism in circular CUMULATIVE BLASTING hole is together with hollow grouting anchor body (2), change anchoring load pass through mechanism, forming friction---the comprehensive support system of the anchoring of embolism NEW TYPE OF COMPOSITE and grouting and reinforcing, significantly improves the consolidation effect of anchor pole to Rock And Soil, slip casting embolism in the cavity body that blasting and perforating device (1) is formed can form major part anchoring rod together with hollow grouting anchor, this increases built-up arch thickness to make the conical funnel force structure (as shown in Figure 9) of original small area of contact become the large-area halfpace force structure (as shown in Figure 10) in large termination, thus improves integer support intensity.
Claims (5)
1. the jet perforating hollow grouting anchor with cage of reinforcement, comprise blasting and perforating device (1), hollow grouting anchor body (2), beehive-shaped charge (5), cage of reinforcement (6) four major parts, it is characterized in that: described blasting and perforating device (1) is made up of axial end iron (19), fixed bar (18), radial perforated casing (22), pellet (21), barb (23) and the medicine that detonates (20), wherein, two pieces of axial end iron (19) are circular slab, centre has hole, can pass through fixed bar (18); Radial perforated casing (22) is cylindrical shape, and be sandwiched between two pieces of axial end iron (19), its inside is placed with the medicine that detonates (20), is placed with pellet (21) in the shell hole on radial perforated casing (22); Axial end iron (19), the radial perforated casing (22) that the medicine that detonates (20) and pellet (21) are housed, barb (23) are fixing to be successively fixed on fixed bar (18) by screw, the hook of barb (23) and axial end iron (19) are arranged in the other direction, and be welded on hollow grouting anchor body (2) bottom, namely blasting and perforating device (1) is positioned at boring bottom, is thereafter hollow grouting anchor body (2).
2. a kind of jet perforating hollow grouting anchor with cage of reinforcement according to claim 1, it is characterized in that: described hollow grouting anchor body (2) is both ends open, cylindrical cavity, the tube wall of hollow grouting anchor body (2) has two row circular ports (17), two row circular ports are crisscross arranged, circular port (17) extends to anchor pole inside and makes 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), and stemming (11) is filled on its top, and works as ring (16) with roof bolt plate (13) and anchor pole successively.
3. a kind of jet perforating hollow grouting anchor with cage of reinforcement according to claim 1, it is characterized in that: described detonator (3) inserts in igniting primer (4), and be connected with detonator payment to a porter (15), beehive-shaped charge (5) is made up of explosive and sockets for collecting energy (7), wherein explosive shape is the combination bodily form of cylinder and cone, sockets for collecting energy (7) is conical, the cavity liner with its same shape is inlaid with in sockets for collecting energy (7), linked together by detonating fuse (8) between each beehive-shaped charge (5), and be connected with igniting primer (4) with described blasting and perforating device (1), detonating fuse (8) is successively through blasting and perforating device (1), igniting primer (4), beehive-shaped charge (5).
4. a kind of jet perforating hollow grouting anchor with cage of reinforcement according to claim 1, it is characterized in that: described cage of reinforcement (6) is by stirrup (25), 4 radial reinforcing bars (26) and upper and lower two bar reinforcements (10) composition, upper and lower two bar reinforcements (10) and radial reinforcing bar (26) are welded on stirrup (25), the both sides of every root bar reinforcement (10) are welded with two radial reinforcing bars (26), wherein, the length of radial reinforcing bar (26) is less than the length of hollow grouting anchor body (2), the length of bar reinforcement (10) is greater than the length of hollow grouting anchor body (2), the end of the fixed bar (18) of its bottom and blasting and perforating device (1) at grade, its top ends does screw thread process, through the circular hole on bar reinforcement backing plate (12), fixed by hold-down nut (14), mouth individual stirrup is farthest bored and bar reinforcement contact site, upside is provided with the reinforcement bar (24) tying up igniting primer in the upper distance of cage of reinforcement (6), the upper distance of cage of reinforcement (6) bores mouth individual stirrup farthest and bar reinforcement contact site, upper and lower both sides is welded on hollow grouting anchor body (2) inwall, also upper and lower both sides bar reinforcement and hollow grouting anchor body (2) inwall is done soldering at drilling orifice place.
5. the jet perforating hollow grouting anchor construction method based on band cage of reinforcement according to claim 1, comprise comparatively hard rock body, soil body construction method, it is characterized in that: described comparatively hard rock body, soil body construction method, comprise the following steps: 1) preparation machine, after drilling jumbo is in place, connect the water supply of jumbo, for electric line; 2) measure cloth eye, according to Soil Anchor Design spacing and rock mass, the bedding of the soil body and the distribution situation at joint, mark eye position with coating; For bedding, joints development position, should encrypt and lay eye position; 3) hole, get out anchor pole fixing hole with drilling jumbo on the eye position marked, during boring, drilling rod is perpendicular to the bed plane of rock mass or the soil body; The size of bore diameter is relevant with the hardness of Rock And Soil, when ensureing that bore diameter is greater than hollow grouting anchor body diameter, the bore diameter on rock mass is got greatly, and the bore diameter on the soil body is got smaller, determine by experiment, be as the criterion to squeeze into anchor pole smoothly; 4) clear hole and inspection, passes into high-pressure blast with elbow steel pipe and blows off aggregate chips in anchor pole fixing hole and tiny stone; Check whether the hole depth of anchor pole fixing hole meets the demands; 5) squeeze into blast perforating system and anchor pole, bottom welding has the hollow grouting anchor body of blasting and perforating device to squeeze into anchor pole fixing hole, until reach projected depth, detonator payment to a porter is retained in outside boring; 6) shutoff stemming, at this hollow grouting anchor plug at end part stemming; 7) detonate, ignite igniting primer by detonator payment to a porter, and then penetrate control device and each beehive-shaped charge by detonating fuse ignition explosion; 8) clear hole, passes into high-pressure blast with elbow steel pipe and blows off aggregate chips in anchor pole fixing hole and tiny stone, be beneficial to cement mortar and fully contact with crag; 9) stop grouting plug is installed, at the afterbody of anchor pole, stop grouting plug is installed, then the hold-down nut of skyhook backing plate, anchor pole baffle ring, bar reinforcement backing plate, fixing bar reinforcement successively; 10) slip casting, inject cement mortar by slip casting passage, cement mortar fills anchor pole fixing hole, hollow grouting anchor end formed in a large cavity body and each circular CUMULATIVE BLASTING hole, the injecting cement paste at each position is connected; After slip casting, with the timely shutoff of Anchor Agent.
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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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