CN109373193B - Tunnel blasting excavation system and construction method - Google Patents
Tunnel blasting excavation system and construction method Download PDFInfo
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- CN109373193B CN109373193B CN201811399256.9A CN201811399256A CN109373193B CN 109373193 B CN109373193 B CN 109373193B CN 201811399256 A CN201811399256 A CN 201811399256A CN 109373193 B CN109373193 B CN 109373193B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/08—Pipe-line systems for liquids or viscous products
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Abstract
The invention relates to a tunnel blasting excavation system, which comprises a water bag, a cartridge, a separated wrapping rib sheet, a U-shaped explosive loading tool, a section steel portal frame, a push-pull stemming filling special tool, a stemming sample preparation special tool, an excavation rock body, a safety protection net and a foot stool bent frame; the external explosive cartridge is externally provided with a separated wrapping rib sheet, the water bag and the explosive cartridge are connected into a whole through the separated wrapping rib sheet, the external detonating cord is arranged on the outer side of the separated wrapping rib sheet, and the outer side of the separated wrapping rib sheet is provided with an explosive cartridge adherence rib sheet; the water bag and the cartridge combined structure is charged through a U-shaped charging tool; the U-shaped medicine-charging tool is provided with an arc-shaped medicine-charging clamping plate, a circular tube-shaped handle and an elastic handle. The invention has the beneficial effects that: the water bag is connected with the separated wrapping ribs before the explosive cartridge is filled, the separated wrapping ribs surround to form a whole, and the external detonating cord is adopted, so that the stemming filling efficiency is improved; when the water bag and the explosive cartridge are filled, the U-shaped explosive loading tool is adopted to carry out integral explosive loading, the explosive loading efficiency can be improved, and the reworking is reduced.
Description
Technical Field
The invention relates to a tunnel blasting excavation system and a construction method, which are suitable for tunnel blasting excavation engineering.
Background
The blast hole water bag filling tunnel blasting method adopts the water bag and stemming composite blocking of the blast hole, makes full use of the incompressibility of water, reduces the attenuation of shock waves in the transmission process, relatively prolongs the action time of explosion energy, improves the degree of fragmentation of rocks and the effective utilization rate of explosive energy, is very favorable for the fragmentation of surrounding rocks, reduces the dust hazard, improves the construction environment in the tunnel and saves the construction cost.
In the tunnel blasting excavation process by adopting a blast hole water bag filling tunnel blasting method, the installation of the tunnel excavation trolley and the improvement of the trolley flyrock protection work have important significance for the tunnel blasting excavation. When the blast hole is filled with explosive, the broken stones at the edges and corners easily cut the water bag when the water bag is filled, so that the water bag leaks, and the explosive is affected with damp and fails. The blast hole is usually plugged manually, the operation precision is low, the blasting quality is seriously influenced when the blockage is not in place or is not compact, and the construction cost and the construction workload are increased. Therefore, it is worth exploring how to improve the filling efficiency of the water bag, the explosive stick and the stemming. In addition, for protecting step blasting flying stones, how to reduce the damage range of the flying stones is achieved, and the flying stones are protected for machine equipment such as a foot stool bent frame closer to the tunnel face, so that the tunnel blasting safety construction is very important. The related tunnel blasting excavation system is innovative, and has important significance for improving the construction efficiency, reducing the engineering cost and preventing blasting construction accidents.
In view of this, in order to solve the problems of poor tunnel blasting excavation construction effect and the like in the common construction method, the invention of a simple and effective tunnel blasting excavation system and a construction method is urgently needed to improve the construction efficiency and the construction safety of the tunnel blasting excavation system.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a tunnel blasting excavation system and a construction method.
The tunnel blasting excavation system comprises a water bag, a cartridge, a separated wrapping rib sheet, a U-shaped explosive loading tool, a profile steel gantry, a push-pull stemming filling special tool, a stemming sample preparation special tool, an excavation rock body, a safety protection net and a foot stool bent;
the external explosive cartridge is externally provided with a separated wrapping rib sheet, the water bag and the explosive cartridge are connected into a whole through the separated wrapping rib sheet, the external detonating cord is arranged on the outer side of the separated wrapping rib sheet, and the outer side of the separated wrapping rib sheet is provided with an explosive cartridge adherence rib sheet; the water bag and the cartridge combined structure is charged through a U-shaped charging tool; the U-shaped medicine charging tool is provided with an arc-shaped medicine charging clamping plate, a round tube-shaped handle and an elastic handle;
the profile steel portal of the track type simple tunnel excavation trolley is provided with a reinforced inner support frame, a bottom longitudinal beam, a light steel net rack platform and an extension ejector rod; a platform plate is arranged at the top of the profile steel portal, trolley side wall folding type operating platforms are arranged on two sides of the profile steel portal, and inserting tool type guardrails are arranged on two sides of the platform plate; the outer side of the trolley is provided with a pedestrian ladder and a sliding lifting type transporting platform, the sliding lifting type transporting platform is provided with a transporting platform power system, and the inner side of the trolley is provided with a trolley explosion-proof plate;
the stemming is blocked by a special push-pull stemming filling tool and a special stemming sample preparation tool; the special push-pull stemming filling tool comprises a stemming preparing cylinder with a blade, a sliding push plate, a T-shaped push-pull rod and a push-pull rod sliding cylinder, and comprises a stemming placing groove, a horizontal stemming pressing plate, a stemming pressing plate partition plate and a T-shaped pressing handle;
a flexible explosion-proof layer, a bamboo sheet steel wire mesh layer and a sand bag are sequentially arranged on the excavated rock mass, and a safety protection net is arranged outside the blasting area;
a bent bottom plate and a bottom plate fixing anchor are arranged below the foot stool bent; the foot rest bent frame is provided with a separated wall-adhering steel plate and a wall-adhering steel plate top frame, and the top of the foot rest bent frame is provided with a cantilever net rack.
Preferably, the method comprises the following steps: an extension ejector rod is arranged around the profile steel portal and supported on the tunnel face through an ejector rod arc support, an extension ejector rod rest is arranged at the bottom of the extension ejector rod, and the extension ejector rod is adjusted in length through an extension ejector rod tightening screw rod.
Preferably, the method comprises the following steps: the walking tire is arranged at the bottom of the section steel portal frame, the symmetrical parking lock plates are arranged on the walking tire, the bottom of the walking tire is a channel steel rail, a rail lock lug is arranged on the channel steel rail, and the symmetrical parking lock plates are fixed on the rail lock lug.
Preferably, the method comprises the following steps: the inner side of the trolley is provided with a trolley explosion-proof plate, and the trolley explosion-proof plate is provided with an explosion-proof plate door opening.
Preferably, the method comprises the following steps: a sliding push plate is arranged in the sample preparation cylinder with the edge opening and is pushed by a T-shaped push-pull rod, and a push-pull rod sliding cylinder is arranged outside the T-shaped push-pull rod.
Preferably, the method comprises the following steps: the special tool for stemming sample preparation is characterized in that a limiting fixing bottom plate is arranged at the bottom of the special tool for stemming sample preparation, a stemming placing groove is arranged on the upper portion of the limiting fixing bottom plate, a mud pressing plate partition plate is arranged on one side of the stemming placing groove, a horizontal mud pressing plate is placed at the top of the stemming, and a T-shaped pressing handle is arranged at the top of the horizontal mud pressing plate.
Preferably, the method comprises the following steps: a safety protection net is arranged outside the blasting area, and the bottom of the safety protection net is fixed through an anchor rod fixed outside the blasting area.
Preferably, the method comprises the following steps: the top of the foot rest bent is provided with an overhanging net rack, and a flexible buffer protective net, a steel wire rope passive protective net and a dust separation net are sequentially arranged on the overhanging net rack from inside to outside.
The construction method of the tunnel blasting excavation system comprises the following steps:
1) installing a track type simple tunnel excavation trolley; the position of the trolley is fixed through a symmetrical parking lock plate on the traveling tire and a rail lock lug on a channel steel rail; an extension ejector rod is arranged around the profile steel portal, and the length of the extension ejector rod is adjusted by tightening a screw rod of the extension ejector rod, so that the arc support of the ejector rod is tightly attached to the tunnel face;
2) arranging blast holes; determining the position of a blast hole, and starting drilling operation;
3) manufacturing a water bag; manufacturing a water bag, wherein when water is filled, the water is filled in 90% of the water bag, and the bag opening is fastened;
4) assembling a water bag and explosive; the water bag and the explosive cartridge are connected with the separated wrapping ribs firstly, the separated wrapping ribs are enclosed into a whole, the external detonating cord is arranged on the outer side of the separated wrapping ribs, and the explosive cartridge adherence ribs are arranged on the outer side of the separated wrapping ribs;
5) charging a U-shaped charging tool; loading the water bag and explosive combination device into a blast hole by using a U-shaped explosive loading tool;
6) stemming; taking stemming from a special stemming sample preparation tool by adopting a push-pull stemming filling tool, slightly pushing the stemming into a stemming hole, pushing a stemming plate partition plate to extrude the stemming when the height of the stemming is insufficient, placing a horizontal stemming plate on the top of the stemming, extruding the stemming tightly by a T-shaped pressing handle, and continuously sampling to plug the stemming hole until the completion of plugging;
7) protecting flying stones; the trolley is far away from the tunnel face by more than 60 meters; sequentially arranging a flexible explosion-proof layer, a bamboo sheet steel wire mesh layer and a sand bag on an excavated rock mass, and arranging a safety protection net outside an explosion area; a bent bottom plate and a bottom plate fixing anchor are arranged below the foot rest bent, and a flexible buffer protective net, a steel wire rope passive protective net and a dust separation net are sequentially arranged inside the foot rest bent;
8) detonating; carrying out detonation network connection, and carrying out detonation after safety is confirmed;
9) deslagging; and conveying the broken stone ballast out of the tunnel.
The invention has the beneficial effects that:
(1) the water bag is connected with the separated wrapping ribs before the explosive cartridge is filled, the separated wrapping ribs surround to form a whole, and the external detonating cord is adopted, so that the stemming filling efficiency is improved; when the water bag and the explosive cartridge are filled, the U-shaped explosive loading tool is adopted to carry out integral explosive loading, the explosive loading efficiency can be improved, and the reworking is reduced.
(2) According to the adjustable extension push rod, the adjustable extension push rod is arranged around the profile steel portal of the track type simple tunnel excavation trolley, the arc support is arranged at the top end of the push rod, the push rod is guaranteed to be in close contact with a tunnel face, the extension push rod is provided with the extension push rod tensioning screw rod to adjust the length of the push rod, and quick installation and dismantling can be achieved.
(3) According to the invention, the symmetrical parking lock plates are arranged on the traveling tires, and the rail lock lugs are arranged on the channel steel rails, so that the trolley tire fixing device is used for fixing the trolley tires and is simple to operate.
(4) The sample preparation barrel is internally provided with the sliding push plate which is pushed by the T-shaped push-pull rod, so that the operation is simple and convenient, and the rapid filling of stemming can be realized.
(5) A stemming pressing plate partition plate is arranged on one side of the stemming placing groove, stemming is extruded through the stemming pressing plate partition plate when the height of the stemming is insufficient, a horizontal stemming pressing plate is placed on the top of the stemming, and the stemming is compacted through a T-shaped pressing handle.
(6) According to the invention, a safety protection net is arranged outside the blasting area, an overhanging net rack is arranged at the top of the foot rest bent, and a flexible buffer protection net, a steel wire rope passive protection net and a dust separation net are sequentially arranged on the overhanging net rack from inside to outside to perform multi-layer protection.
Drawings
FIG. 1 is a schematic diagram of a tunnel blasting combined charge architecture;
figure 2 is a cross-sectional view of a tunnel blasting combined charge configuration;
FIG. 3 is a schematic view of a U-shaped loading tool;
FIG. 4 is a schematic view of a track-type simple tunnel excavation trolley system;
FIG. 5 is a side view of a rail mounted simple tunnel excavation trolley system;
FIG. 6 is a schematic view of a push-pull stemming tamping specialized tool;
FIG. 7 is a schematic view of a special tool for stemming sample preparation;
FIG. 8 is a schematic diagram of step blasting hanging net protection;
FIG. 9 is a schematic view of multi-layer protection of a tunnel face stereotyped wall-attached bent;
fig. 10 is a schematic view of an adherent bent.
Description of reference numerals: 1-blasthole, 2-water bag, 3-cartridge, 4-detonator, 5-isolating membrane, 6-stemming, 7-cartridge adherence rib sheet, 8-separated wrapping rib sheet, 9-rib belt, 10-external detonating cord, 11-end sheet, 12-U-shaped charging tool, 13-arc charging splint, 14-round-tube-shaped handle, 15-loosening handle, 16-section steel portal frame, 17-reinforced inner support frame, 18-bottom longitudinal beam, 19-light steel net rack platform, 20-platform plate, 21-splicing tool type guardrail, 22-pedestrian ladder, 23-sliding lifting type moving platform, 24-moving platform power system, 25-walking tire, 26-channel steel rail, 27-rail locking lug, 28-symmetrical parking locking plate, 29-trolley mobile power system, 30-trolley explosion-proof plate, 31-explosion-proof plate door opening, 32-extension ejector rod, 33-ejector rod arc support, 34-extension ejector rod rest, 35-extension ejector rod tightening screw, 36-trolley side wall folding type operation platform, 37-sample making barrel with edge, 38-sliding push plate, 39-T-shaped push-pull rod, 40-push-pull rod sliding barrel, 41-horizontal push-pull handle, 42-U-shaped framework, 43-limiting fixed bottom plate, 44-mud foaming placement groove, 45-horizontal mud pressing plate, 46-mud pressing plate partition plate, 47-mud overflow hole, 48-T-shaped press handle, 49-excavated rock mass, 50-rock mass blast hole, 51-rock mass free surface, 52-flexible explosion-proof layer, 53-bamboo sheet steel wire mesh layer, 54-a sand bag, 55-an external fixing anchor rod of a blasting area, 56-a safety protection net, 57-a foot stool bent, 58-a bent bottom plate, 59-a bottom plate fixing anchor, 60-a separating wall-attached steel plate, 61-a wall-attached steel plate top frame, 62-a hanging net rack, 63-a flexible buffer protection net, 64-a steel wire rope passive protection net and 65-a dust separation net.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
The tunnel blasting excavation system comprises a tunnel blasting combined type charging structure system, a track type simple tunnel excavation trolley system, a tunnel blasting excavation blasthole blocking tool and a blasting flyrock protection structure system.
As shown in fig. 1 to 3, the combined charging structure system for tunnel blasting comprises a water bag 2, a cartridge 3, a detonator 4, stemming 6, a cartridge wall-adhering rib 7, a separate wrapping rib 8, a rib belt 9, an external detonating cord 10, a U-shaped charging tool 12 and the like, wherein L is the depth of a blasthole, L1 is the length of a bottom water bag of the blasthole, L2 is the length of explosive, L3 is the length of a middle upper water bag of the blasthole, L4 is the length of the stemming, the processing diameter of the stemming is generally 35mm, and the length is 20-30 cm. The bag 2 is typically 200mm long, 35mm in diameter and 0.8mm thick. The external disconnect-type parcel rib piece 8 that is equipped with of cartridge 3, parcel rib piece adopt mao bamboo chip, and water bag 2 and cartridge 3 connect into an entirety through disconnect-type parcel rib piece 8, and external detonating cord 10 is arranged in the disconnect-type parcel rib piece 8 outside, and the disconnect-type parcel rib piece 8 outside sets up cartridge adherence rib piece 7, and U-shaped powder charge instrument 12 sets up arc powder charge splint 13, tubular handle 14, elasticity handle 15. The water bag 2 and the cartridge 3 are assembled to be charged by a U-shaped charging tool 12.
As shown in fig. 4 to 5, the track type simple tunnel excavation trolley system comprises a section steel portal 16, a reinforced inner support frame 17, 14 h-section steel, 16 h-section steel, a bottom longitudinal beam 18, a 20a h-section steel, a light steel net rack platform 19, 10 channel steel, a splicing tool type guardrail 21, a pedestrian ladder 22, a sliding lifting type moving platform, a trolley explosion-proof plate 30, an extension ejector rod 32, a trolley side wall folding type operating platform 36 and the like. The top of the section steel portal 16 is provided with a platform plate 20, two sides of the section steel portal 16 are provided with trolley side wall folding type operating platforms 36, two 20a I-beams with the length of 1.5m are used as two frames, two 20a I-beams with the length of 2.5m are used as one frame, and are respectively matched with an inclined strut, and the trolley side wall folding type operating platforms 36 are fixed by pins and can be folded when not used. The two sides of the platform plate 20 are inserted into the seams and are used for arranging the inserted tool type guardrail 21. The outer side of the trolley is provided with a pedestrian ladder 22 and a sliding type transporting platform 23, the sliding type transporting platform 23 is provided with a transporting platform power system 24, the transporting platform power system 24 adopts a JK0.5-JK5 single-reel quick winding machine, the inner side of the trolley is provided with a trolley explosion-proof plate 30, and a channel steel track 26 is laid on the ground.
The section steel portal 16 is made of 20a I-shaped steel, an extension ejector rod 32 is arranged on the periphery of the section steel portal, and the diameter of the extension ejector rod 32 is 100 mm. The top of the extension ejector rod 32 is provided with an ejector rod arc support 33, the ejector rod arc support 33 is made of spliced arc-shaped steel plates, and the extension ejector rod 32 is provided with an extension ejector rod tensioning screw 35 for adjusting the length of the extension ejector rod 32. The walking tire 25 is provided with a symmetrical parking lock plate 28, the channel steel track 26 is provided with a track lock lug 27, and the parking lock plate 28 can be embedded in the track lock lug 27 and used for fixing the trolley. The inner side of the trolley is provided with a trolley explosion-proof plate 30, and the trolley explosion-proof plate 30 is used for trolley flying stone protection during blasting.
As shown in fig. 6 to 7, the tool for plugging the blast hole in tunnel blasting excavation comprises a push-pull stemming plugging special tool and a stemming sampling special tool, the push-pull stemming plugging special tool comprises a sample making cylinder 37 with a blade opening and made of a thin steel plate with a diameter of 2mm, a sliding push plate 38 is made of rubber, a T-shaped push-pull rod is made of a steel plate, a push-pull rod sliding cylinder 40 is made of a thin steel plate with a diameter of 2mm, and the stemming sampling special tool comprises a stemming placing groove 44 made of a steel plate, a horizontal mud pressing plate 45, a mud pressing plate partition plate 46, a T-shaped pressing handle 48 and the like. The special push-pull stemming filling tool adopts a sample making barrel 37 with a blade opening, so that soil can be conveniently taken out, a sliding push plate 38 is arranged in the sample barrel, and stemming can be quickly pushed into a blasthole by pushing through a T-shaped push-pull rod 39.
Stemming system appearance specialized tool bottom sets up spacing PMKD 43 and is used for fixed stemming system appearance specialized tool, prevents that it from rocking at the sample in-process, and stemming shelves groove 44 one side and sets up mud pressing plate baffle 46, and when the stemming height was not enough, mud pressing plate baffle 46 can the horizontal slip extrusion stemming, shelves horizontal mud pressing plate 45 at the stemming top, presses handle 48 closely knit with the stemming extrusion with the T shape.
As shown in fig. 8 to 10, the blasting flying rock protection structure system includes a flexible explosion-proof layer 52, a firewood layer, a bamboo sheet steel wire mesh layer 53, an earthbag 54, an anchor rod 55 fixed outside the blasting area, a safety protection net 56, a foot stool framed bent 57, a 48 × 3.5 steel pipe, a spacing of 100cm × 100cm, a separate wall-attached steel plate 60, a cantilever net rack 62, a flexible buffer protection net 63, a steel wire rope passive protection net 64, a dust-raising isolation net 65, and the like, wherein the flexible explosion-proof layer 52, the bamboo sheet steel wire mesh layer 53, the earthbag 54 are sequentially arranged on an excavated rock mass 49, the safety protection net 56 is arranged outside the blasting area, the safety protection net is fixed by the anchor rod 55 fixed outside the blasting area, and the diameter of the anchor rod is. A bent bottom plate 58 is arranged below the foot stool bent 57, C25 concrete is poured, and a bottom plate fixing anchor 59 is arranged to fix the bottom plate. The foot rest bent frame 57 is provided with a separated wall-adhering steel plate 60 and a wall-adhering steel plate top frame 61, the top of the foot rest bent frame 57 is provided with an overhanging net rack 62, and the overhanging net rack 62 is sequentially provided with a flexible buffer protective net 63, a steel wire rope passive protective net 64 and a dust-raising separation net 65 from inside to outside and used as the multi-layer protection of the tunnel face regularization wall-adhering bent frame.
The construction method of the tunnel blasting excavation system comprises the following steps:
1) installing a track type simple tunnel excavation trolley; the trolley position is fixed by symmetrical parking lock plates 28 on the running tires 25 and rail lock lugs 27 on the channel rails 26. An extension mandril 32 is arranged, and the length of the extension mandril 32 is adjusted through an extension mandril tensioning screw 35, so that the mandril arc support 33 is tightly attached to the palm surface.
2) Arranging blast holes; determining the position of a blasthole 1 according to a design drawing, and starting drilling operation;
3) manufacturing a water bag; the plastic bag for containing water is specially processed and manufactured by plastic manufacturers, the plastic bag is not overfilled when water is contained, 90 percent of the water bag is filled with the water bag, and the bag opening is fastened. The water bag 2 is slightly softened during placement and transportation, and the filling and final blasting effect are not influenced.
4) Assembling a water bag and explosive; the water bag 2 and the explosive cartridge 3 are firstly integrated with the separated wrapping ribs 8 and the separated wrapping ribs 8, the external detonating cord 10 is arranged outside the separated wrapping ribs 8, so that the stemming of the stemming at the later stage is facilitated, and the explosive cartridge adherence ribs 7 are arranged outside the separated wrapping ribs 8.
5) Charging a U-shaped charging tool; the water bag and explosive combination device is loaded into the blast hole by a U-shaped explosive loading tool,
6) stemming; adopt plug-type stemming to pack specialized tool and get the stemming in stemming system appearance specialized tool, push into the porthole gently, when the stemming is not enough in height, promote mud pressing plate baffle 46 and extrude the stemming, shelve horizontal mud pressing plate 45 at the stemming top, the T-shaped handle 48 is pressed closely with the stemming extrusion, then continues the sample and blocks up the porthole until blocking up the completion.
7) Protecting flying stones; the trolley is far away from the tunnel face by more than 60 meters. A flexible anti-explosion layer 52, a bamboo sheet steel wire mesh layer 53 and a sand bag 54 are sequentially arranged on the excavated rock mass 49, and a safety protection net 56 is arranged outside the blasting area. A bent base plate 58 and a base plate fixing anchor 59 are arranged below the foot stand bent 57, and a flexible buffer protective net 63, a steel wire rope passive protective net 64 and a dust separation net 65 are sequentially arranged inside the foot stand bent 57.
8) Detonating; and (5) carrying out detonation network connection, and carrying out detonation after safety is confirmed.
9) Deslagging; and conveying the broken stone ballast out of the tunnel.
Claims (9)
1. A tunnel blasting excavation system is characterized in that: comprises a water bag (2), a explosive roll (3), a separated wrapping rib (8), a U-shaped explosive loading tool (12), a section steel portal frame (16), a push-pull stemming filling special tool, a stemming sample preparation special tool, an excavation rock body (49), a safety protection net (56) and a foot stool bent (57);
the external of the cartridge (3) is provided with a separated wrapping rib sheet (8), the water bag (2) and the cartridge (3) are connected into a whole through the separated wrapping rib sheet (8), the external detonating cord (10) is arranged at the outer side of the separated wrapping rib sheet (8), and the outer side of the separated wrapping rib sheet (8) is provided with a cartridge adherence rib sheet (7); the water bag (2) and the cartridge (3) combined structure are charged through a U-shaped charging tool (12); the U-shaped medicine charging tool (12) is provided with an arc medicine charging clamping plate (13), a round tube-shaped handle (14) and an elastic handle (15);
a profile steel portal (16) of the track type simple tunnel excavation trolley is provided with a reinforced inner support frame (17), a bottom longitudinal beam (18), a light steel net rack platform (19) and an extension ejector rod (32); a platform plate (20) is arranged at the top of the section steel portal (16), trolley side wall folding type operating platforms (36) are arranged on two sides of the section steel portal (16), and inserting tool type guardrails (21) are arranged on two sides of the platform plate (20); the outer side of the trolley is provided with a pedestrian ladder (22) and a sliding type transporting platform (23), the sliding type transporting platform (23) is provided with a transporting platform power system (24), and the inner side of the trolley is provided with a trolley explosion-proof plate (30);
the stemming is blocked by a special push-pull stemming filling tool and a special stemming sample preparation tool; the special push-pull stemming filling tool comprises a stemming sampling cylinder (37), a sliding push plate (38), a T-shaped push rod (39) and a push rod sliding cylinder (40), and comprises a stemming placing groove (44), a horizontal stemming pressing plate (45), a stemming pressing plate partition plate (46) and a T-shaped pressing handle (48);
a flexible explosion-proof layer (52), a bamboo sheet steel wire mesh layer (53) and a sand bag (54) are sequentially arranged on the excavated rock mass (49), and a safety protection net (56) is arranged outside the blasting area;
a bent bottom plate (58) and a bottom plate fixing anchor (59) are arranged below the foot stool bent (57); the foot stool bent frame (57) is provided with a separated wall attaching steel plate (60) and a wall attaching steel plate top frame (61), and the top of the foot stool bent frame (57) is provided with a cantilever net rack (62).
2. The tunneling blasting excavation system of claim 1, wherein: an extension ejector rod (32) is arranged around the section steel portal (16), the extension ejector rod (32) supports the tunnel face through an ejector rod arc support (33), an extension ejector rod rest stand (34) is arranged at the bottom of the extension ejector rod (32), and the extension ejector rod (32) is adjusted in length through an extension ejector rod tightening screw rod (35).
3. The tunneling blasting excavation system of claim 1, wherein: the bottom of the section steel gantry (16) is provided with a traveling tire (25), a symmetrical parking lock plate (28) is arranged on the traveling tire (25), the bottom of the traveling tire (25) is provided with a channel steel track (26), a track lock lug (27) is arranged on the channel steel track (26), and the symmetrical parking lock plate (28) is fixed on the track lock lug (27).
4. The tunneling blasting excavation system of claim 1, wherein: the inner side of the trolley is provided with a trolley explosion-proof plate (30), and the trolley explosion-proof plate (30) is provided with an explosion-proof plate door hole (31).
5. The tunneling blasting excavation system of claim 1, wherein: a sliding push plate (38) is arranged in the sample preparation cylinder (37) with the edge opening, the sliding push plate (38) is pushed by a T-shaped push-pull rod (39), and a push-pull rod sliding cylinder (40) is arranged outside the T-shaped push-pull rod (39).
6. The tunneling blasting excavation system of claim 1, wherein: stemming system appearance specialized tool bottom sets up spacing PMKD (43), and spacing PMKD (43) upper portion sets up stemming and puts groove (44), and stemming shelves groove (44) one side and sets up mud pressing plate baffle (46), and horizontal mud pressing plate (45) are shelved at the stemming top, and horizontal mud pressing plate (45) top sets up T shape and presses handle (48).
7. The tunneling blasting excavation system of claim 1, wherein: a safety protection net (56) is arranged outside the blasting area, and the bottom of the safety protection net (56) is fixed through an external fixing anchor rod (55) of the blasting area.
8. The tunneling blasting excavation system of claim 1, wherein: the top of the foot rest bent frame (57) is provided with an overhanging net rack (62), and the overhanging net rack (62) is sequentially provided with a flexible buffer protective net (63), a steel wire rope passive protective net (64) and a dust-raising isolation net (65) from inside to outside.
9. A construction method of a tunnel blasting excavation system is characterized by comprising the following steps:
1) installing a track type simple tunnel excavation trolley; the trolley position is fixed through a symmetrical parking lock plate (28) on a traveling tire (25) and a rail lock lug (27) on a channel steel rail (26); an extension mandril (32) is arranged around the section steel portal (16), and the length of the extension mandril (32) is adjusted through an extension mandril tensioning screw rod (35), so that a mandril arc support (33) is tightly attached to the tunnel face;
2) arranging blast holes; determining the position of the blast hole (1) and starting drilling operation;
3) manufacturing a water bag; manufacturing a water bag (2), wherein when water is filled, 90% of the water bag (2) is filled with water, and the bag opening is fastened;
4) assembling a water bag and explosive; the water bag (2) and the explosive cartridge (3) are connected with the separated wrapping ribs (8) firstly, the separated wrapping ribs (8) are enclosed into a whole, the external detonating cord (10) is arranged on the outer side of the separated wrapping ribs (8), and the explosive cartridge adherence ribs (7) are arranged on the outer side of the separated wrapping ribs (8);
5) charging a U-shaped charging tool; a water bag and explosive combined device is loaded into a blast hole by a U-shaped explosive loading tool (12);
6) stemming; taking stemming from a special stemming sample preparation tool by adopting a push-pull stemming filling tool, slightly pushing the stemming into a stemming hole (1), pushing a stemming plate partition plate (46) to extrude the stemming when the height of the stemming is insufficient, placing a horizontal stemming plate (45) on the top of the stemming, extruding the stemming tightly by a T-shaped pressing handle (48), and continuously sampling to plug the stemming hole (1) until the plugging is finished; the special push-pull stemming filling tool comprises a stemming sampling cylinder (37), a sliding push plate (38), a T-shaped push rod (39) and a push rod sliding cylinder (40), and comprises a stemming placing groove (44), a horizontal stemming pressing plate (45), a stemming pressing plate partition plate (46) and a T-shaped pressing handle (48);
7) protecting flying stones; the trolley is far away from the tunnel face by more than 60 meters; a flexible explosion-proof layer (52), a bamboo sheet steel wire mesh layer (53) and a sand bag (54) are sequentially arranged on an excavated rock mass (49), and a safety protection net (56) is arranged outside an explosion area; a bent base plate (58) and a base plate fixing anchor (59) are arranged below the foot rest bent (57), and a flexible buffer protective net (63), a steel wire rope passive protective net (64) and a dust-raising isolation net (65) are sequentially arranged on the inner side of the foot rest bent (57);
8) detonating; carrying out detonation network connection, and carrying out detonation after safety is confirmed;
9) deslagging; and conveying the broken stone ballast out of the tunnel.
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| CN110274528A (en) * | 2019-07-08 | 2019-09-24 | 黑龙江省龙建路桥第三工程有限公司 | A kind of fluidic compartment blasting method |
| CN110455139A (en) * | 2019-08-26 | 2019-11-15 | 中建五局第三建设有限公司 | Blasting construction method for earthwork energy discharge groove in high-risk area |
| CN113289747A (en) * | 2021-05-10 | 2021-08-24 | 中煤科工集团重庆研究院有限公司 | Device for removing vault dangerous stone by utilizing blasting shock wave based on three-pump folding |
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| JP2010096419A (en) * | 2008-10-16 | 2010-04-30 | Sb Kogyo Kk | Method of suppressing blasting dust in tunnel construction |
| CN101936689B (en) * | 2010-08-30 | 2012-12-12 | 中铁十九局集团第五工程有限公司 | Vibration isolation charging blasthole and charging method |
| CN106225617B (en) * | 2016-08-09 | 2018-08-21 | 武汉大学 | A kind of rock-burst prevention method based on quick-fried rammer hydrofracturing |
| CN106089258B (en) * | 2016-08-24 | 2018-08-10 | 重庆工商职业学院 | Tunnel device and construction method |
| CN107237642B (en) * | 2017-08-11 | 2018-09-18 | 中建山东投资有限公司 | A kind of the manual work trolley and its construction method of packaged type auxiliary installation arch |
| CN207423009U (en) * | 2017-09-28 | 2018-05-29 | 广东省长大公路工程有限公司 | A kind of tunnel hydraulic pressure demolition constructing structure |
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