CN111197950B - Wave-blocking energy-dissipating based damage effect reduction blasting method - Google Patents
Wave-blocking energy-dissipating based damage effect reduction blasting method Download PDFInfo
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- CN111197950B CN111197950B CN202010124920.XA CN202010124920A CN111197950B CN 111197950 B CN111197950 B CN 111197950B CN 202010124920 A CN202010124920 A CN 202010124920A CN 111197950 B CN111197950 B CN 111197950B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D5/00—Safety arrangements
- F42D5/04—Rendering explosive charges harmless, e.g. destroying ammunition; Rendering detonation of explosive charges harmless
- F42D5/045—Detonation-wave absorbing or damping means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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Abstract
The invention discloses a wave-damping and energy-dissipating based blasting method for reducing harm effect, belonging to the technical field of mining construction and comprising the following steps: sequentially arranging blast holes, wave damping holes, energy dissipation holes and empty holes in a working face; preparing an energy-gathering and energy-dissipating blaster; water, explosive and rubber pad are loaded into the blasting device; filling common explosives into the main blast hole, filling a blasting device with energy accumulation function into the wave-resisting hole, and filling a blasting device with energy dissipation function into the energy dissipation hole; sealing with water stemming; and (5) slightly detonating. The invention is superposed and applied by various methods such as directional crack wave resistance formed by first detonating the wave resistance hole, directional energy absorption of the blaster in the energy dissipation hole, crack initiation of the hollow hole restraining wing, displacement of space to guide the explosion energy propagation of the energy dissipation hole and the like, thereby greatly reducing the blasting hazard effect.
Description
Technical Field
The invention relates to a blasting method, in particular to a blasting method for reducing the explosion hazard effect, and belongs to the technical field of mining construction.
Background
The blasting method has the advantages of convenience, rapidness, economy and the like, and is widely applied to national infrastructure. However, the common blasting method can generate harmful effects such as vibration, cracks, flying stones and the like, reduce the stability of surrounding rocks and damage surrounding buildings. Although the existing presplitting blasting and smooth blasting can improve the regular contour of the surrounding rock to a certain extent, the damage to the surrounding rock and surrounding structures cannot be well avoided due to the random release of the explosion energy and the random expansion of cracks.
Disclosure of Invention
The main purpose of the present invention is to solve the deficiencies of the prior art and to provide a blasting method with reduced detrimental effects.
The purpose of the invention can be achieved by adopting the following technical scheme:
a blasting method for reducing blasting hazard effect comprises the following steps:
step 1: according to the blasting design, blast holes, wave-blocking holes, energy-dissipating holes and empty holes in a main blasting area are arranged on a blasted working face.
Step 2: and preparing the energy-gathering and energy-dissipating blaster.
And step 3: explosive, water, rubber pad and other energy absorbing matter are loaded into the energy accumulating and dissipating blasting unit.
And 4, step 4: the common explosive is filled into a blast hole of a main explosion area, and the energy-gathering and energy-dissipating blasters containing the explosive are filled into a wave-blocking hole and an energy-dissipating hole.
And 5: and (3) blocking the blast hole by using water stemming, wherein the blocking length is 25-40 times of the diameter of the blast hole.
Step 6: and (4) connecting blast holes, and detonating by using a differential method.
Preferably, in step 1, the energy dissipation blast holes are arranged on the excavation contour line, the wave-blocking holes are arranged in a row and located between the blast holes of the main explosion area and the energy dissipation holes, and the row distance between the wave-blocking holes and the energy dissipation holes is 0.75 times of the row distance between the blast holes of the main explosion area. The hole pitch of the blast holes in the main explosion area is 30-50 times of the diameter of the blast holes, the hole pitch of the wave-damping blast holes is the same as that of the blast holes in the main explosion area, and the hole pitch of the energy dissipation blast holes is 0.75 times of that of the blast holes in the main explosion area.
Preferably, in step 1, the depth of the wave-blocking hole is 1.1 times of the depth of the blast hole of the main explosion area, and the depth of the energy-dissipating hole is the same as the depth of the blast hole of the main explosion area.
Preferably, in step 1, the holes are located at two ends of the row of wave choke blastholes, and the hole distance between the holes is half of the hole distance between the holes of the wave choke blastholes.
Preferably, in the step 2, the energy-gathering and energy-dissipating blaster is made of hard PVC and comprises two closed energy-gathering cavities, a cavity A and a cavity B, and the energy-gathering angle is 15-45 degrees.
Preferably, in step 3, water is filled in the energy-gathering cavity of a part of energy-gathering and energy-dissipating blasters, and the explosive is filled in the cavity A, B, and the energy-gathering and energy-dissipating blasters have the energy-gathering effect; the other part of the energy-gathering and energy-dissipating blaster is provided with explosives in a cavity A, and energy-dissipating substances such as rubber pads and the like in a cavity B and an energy-gathering cavity, and the energy-gathering and energy-dissipating blaster has an energy-dissipating effect.
Preferably, in the step 4, the energy-gathering and energy-dissipating blasters with the energy-gathering function are arranged in the wave-resisting holes, and the energy-gathering direction is parallel to the excavation contour line; the energy-gathering and energy-dissipating blaster with the energy dissipating function is arranged in the energy dissipating hole, the cavity B provided with energy-absorbing substances such as a rubber pad faces one side of the reserved rock mass, and the cavity A provided with explosive faces one side of the main blasting area. The explosive loading of the wave-resistant hole is 0.75 times of that of the blast hole in the main explosion area, and the explosive loading of the energy dissipation hole is 1/2 times of that of the wave-resistant blast hole.
Preferably, in step 6, the wave-blocking blastholes are initiated in a row first, then the blastholes in the main explosion area are initiated in a row by row, and the energy-dissipating blastholes are initiated finally.
The invention has the beneficial technical effects that:
1. a blaster has two purposes: can not only gather energy but also dissipate energy, and is convenient and practical. For the wave-resisting hole, the blasting device has an energy-collecting effect, water is filled in the closed energy-collecting cavity, explosives are filled in the cavities A and B, the water in the energy-collecting cavity is compressed to form energy-collecting water jet after the explosives are exploded, and the water jet impacts the rock wall to form a directional crack. For the energy dissipation hole, the blasting device has a directional energy dissipation effect, the cavity B is filled with energy absorption materials such as a rubber pad and the like, and the cavity B faces one side of the reserved rock body and can absorb energy transmitted into the reserved rock body by explosion of the energy dissipation hole, so that the protection of the reserved rock body is improved.
2. The wave-resistant hole is initiated firstly, directional cracks formed by adjacent blast holes are communicated with each other under the action of the energy-gathered water jet, a crack is formed between the main explosion area and the reserved rock mass, and the crack can prevent stress waves and cracks generated by the explosion of the main explosion area from expanding towards the direction of the reserved rock mass. Meanwhile, the cracks increase free surfaces for a row of main explosion area blast holes adjacent to the cracks, and the explosive quantity of the row of main explosion area blast holes can be reduced.
3. And the holes are arranged at the two ends of the wave-resisting hole, the directional crack formed by the wave-resisting hole is communicated with the holes, and the holes can inhibit the wing cracks generated at the end part of the directional crack under the explosion load of the main explosion area from expanding towards the direction of the reserved rock mass, so that the stability of the reserved rock mass is improved.
4. The wave-blocking hole which is detonated firstly has a distance from the reserved rock mass, and a row of energy dissipation holes are arranged between the reserved rock masses and can block the energy generated by the explosion of the wave-blocking hole from being transmitted to the reserved rock mass.
5. Energy absorbing materials such as rubber pads and the like are arranged in the cavity B close to one side of the reserved rock body in the energy dissipation hole, so that the energy transmitted to the reserved rock body from the explosion of the energy dissipation hole can be absorbed, and the surrounding rock is protected. Meanwhile, after the wave-blocking blast hole and the main explosion area blast hole are exploded, a displacement space is provided for the final detonating energy dissipation hole, the explosion energy of the energy dissipation hole is guided to be transmitted to the explosion area, and the energy is reduced to be transmitted to the reserved rock mass.
6. In one blasting scheme, multiple methods of directional crack wave blocking, energy absorbing substance wave absorbing, hollow hole suppression of wing crack initiation, displacement space guide energy propagation and the like are overlapped and applied, so that the blasting hazard effect is greatly reduced.
Drawings
FIG. 1 is a schematic diagram of a cumulative-energy-dissipating blasting machine according to a preferred embodiment of the blasting method for reducing blasting hazard effects based on wave-damping and energy-dissipating of the present invention;
fig. 2 is a schematic diagram of arrangement of blast holes of a preferred embodiment of a blasting method for reducing blasting hazard effects based on wave-damping and energy-dissipating according to the present invention;
in the figure: 1-cavity A, 2-cavity B, 3-energy-gathering cavity, 4-energy-gathering angle, 5-main explosion region, 6-main explosion region blast hole, 7-wave-damping hole, 8-energy-dissipating hole, 9-hollow hole, 10-reserved rock mass and 11-directional crack.
Detailed Description
In order to make the technical solutions of the present invention more clear and definite for those skilled in the art, the present invention is further described in detail below with reference to the examples and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
As shown in fig. 2, the blasting method for reducing the blasting hazard effect according to this embodiment includes the following steps:
step 1: the blast hole 6 of the main explosion area, the wave-blocking hole 7, the energy dissipation hole 8 and the empty hole 9 are sequentially arranged on the working face.
Step 2: preparing an energy-gathering and energy-dissipating blaster;
and step 3: water is filled in an energy-gathering cavity 3 of a part of energy-gathering and energy-dissipating blasters, and explosives are filled in cavities A1 and B2; the other part of the energy-gathering and energy-dissipating blaster cavity A1 is filled with explosives, and the cavity B2 and the energy-gathering cavity 3 are filled with energy-dissipating substances such as rubber pads and the like.
And 4, step 4: filling common explosives into blast holes 6 of a main explosion area; loading the cavities A1 and B2 into the wave-resisting hole 7; energy-accumulating and energy-dissipating blasting devices, in which only the cavity a1 is filled with explosive, are installed in the energy-dissipating holes 8.
And 5: and (3) blocking the blast hole by using water stemming, wherein the blocking length is 25-40 times of the diameter of the blast hole.
Step 6: and (4) connecting blast holes, and detonating by using a differential method.
Energy dissipation blast holes 8 are arranged on an excavation contour line in the step 1, the wave resistance holes 7 are arranged in a row and are positioned between the blast holes 6 of the main explosion area and the energy dissipation holes 8, the wave resistance holes 7 which are detonated first have a certain distance from the reserved rock mass 10, the rock mass and the energy dissipation holes 8 in the distance can block energy and cracks transmitted from the explosion of the wave resistance holes 7 to the reserved rock mass 10, and the problems that the pre-splitting holes directly face the reserved rock mass 10 in common pre-splitting blasting and the energy and the cracks generated by the explosion directly extend to the reserved rock mass 10 are solved.
In the step 1, the row distance between the wave-blocking blast holes 7 and the energy-dissipation blast holes 8 is 0.75 times of the row distance of the blast holes in the main explosion area. The hole pitch of blast holes in the main explosion area is 30-50 times of the diameter of the blast holes, the 7-hole pitch of the wave-blocking holes is the same as the 6-hole pitch of the blast holes in the main explosion area, and the 8-hole pitch of the energy dissipation blast holes is 0.75 times of the 6-hole pitch of the blast holes in the main explosion area.
In the step 1, the hole depth of the wave-resisting hole 7 is 1.1 times of the depth of the blast hole 6 of the main explosion area, and the hole depth of the energy dissipation hole 8 is the same as the depth of the blast hole 6 of the main explosion area.
In the step 1, the two ends of the wave-resisting hole 7 are provided with the empty holes 9, and the hole distance between the empty holes 9 and the wave-resisting hole 7 is half of the hole distance between the two wave-resisting holes 7. The directional crack 11 formed by the wave-damping hole 7 is communicated with the hollow hole 9, and the hollow hole 9 can inhibit the directional crack 11 from generating wing cracks under the explosive load of the main explosion area 5 to expand towards the direction of the reserved rock mass 10, so that the stability of the reserved rock mass 10 is improved.
In the step 2, the same blasting device has two functions of energy gathering and energy dissipation, and has the characteristics of convenience, practicability, convenience in popularization and the like. The energy-gathering and energy-dissipating blaster is made of hard PVC and comprises two closed energy-gathering cavities 3, a cavity A1 and a cavity B2. Through earlier experiments, the optimal energy-gathering angle 4 is 15-45 degrees, the impact force of the energy-gathering water jet formed in the angle is strongest, and the directional crack 11 is easier to form.
In step 4, water is filled in the energy-gathering cavity 3, and the energy-gathering and energy-dissipating blasters with the cavities A1 and B2 filled with explosives have energy-gathering effect and are applied to the wave-resisting holes 7 to form energy-gathering water jets after explosion, and directional cracks 11 are formed in the direction parallel to the contour lines. The energy-gathering and energy-dissipating blaster with the cavity A1 filled with explosives and the energy-absorbing rubber pads filled in the energy-gathering cavity 3 and the cavity B2 has a directional energy-absorbing effect and is applied to the energy-dissipating hole 9, and the cavity B2 faces one side of the reserved rock body 10 and can absorb the energy transmitted to the reserved rock body 10 by the explosion of the energy-dissipating hole to protect surrounding rocks.
In step 6, the wave-blocking holes 7 are detonated in rows first, then the blast holes 6 in the main explosion area are detonated in rows, and the energy-dissipating holes 8 are detonated finally. The wave-blocking hole 7 is initiated firstly to form a directional crack 11, so that the expansion of the explosion stress wave and the explosion crack of the main explosion area 5 to the reserved rock body 10 is blocked. The energy dissipation holes 9 are detonated at last, the wave blocking holes 7 and the main explosion area blast holes 6 which are detonated at first provide displacement space for the energy dissipation holes 9 which are detonated at last, the explosion energy of the energy dissipation holes 9 is guided to be transmitted towards the main explosion area 5, and the energy is reduced to be transmitted towards the direction of the reserved rock mass 10.
Example 1
Fig. 1 shows a schematic structural diagram of an energy-gathering and energy-dissipating blaster, which comprises a cavity A1 for containing explosives, a cavity B2 for containing explosives or energy-absorbing substances, an energy-gathering cavity 3 for containing water or energy-absorbing substances and an energy-gathering angle 4 with an optimal energy-gathering angle of 15 degrees to 45 degrees. Fig. 2 shows a schematic diagram of arrangement of blast holes, which comprises a main explosion area 5, a main explosion area blast hole 6, a wave-damping hole 7, an energy dissipation hole 8, a hollow hole 9, a reserved rock body 10 and a directional crack 11.
Example 2
The method for reducing the hazard effect based on wave-blocking energy dissipation based on the embodiment 1 is described as follows, comprising the following steps:
step 1: the main blast hole 6 is arranged as shown in fig. 2.
Preferably, the holes are drilled vertically, the hole depth is 13m, the diameter of each blast hole 6 is 120mm, the distance between the blast holes 6 is 5m, and the row spacing is 4.3 m.
Step 2: wave-blocking holes 7 are arranged, the row distance between the wave-blocking holes 7 and the energy dissipation holes 8 is 0.75 times of the row distance of blast holes 6 in the main explosion area, and the hole depth is 1.1 times of the blast holes 6 in the main explosion area, as shown in figure 2.
Preferably, the holes are drilled vertically, the hole depth is 14.5m, the diameter of each blast hole 7 is 120mm, the distance between each blast hole 7 is 5m, the distance between each wave-blocking hole 7 and a blast hole row of a main explosion area adjacent to the wave-blocking hole 7 is 4.3m, and the distance between each wave-blocking hole 7 and the energy dissipation hole 8 is 3.3 m.
And step 3: energy dissipation holes 8 are arranged, and the hole distance of the energy dissipation holes 8 is 0.75 times of the hole distance of the blast holes 6 in the main explosion area, as shown in figure 2.
Preferably, the energy dissipation holes 8 are arranged on the excavation contour line and drilled vertically, the hole depth is 13m, the diameter of each blast hole is 120mm, and the distance between the blast holes is 3.75 m.
And 4, step 4: and arranging the holes 9, wherein the holes 9 are positioned at two ends of the wave-resisting holes 7, and the pitch between the holes 9 and the wave-resisting holes 7 is half of that of the wave-resisting holes 7, as shown in figure 2.
Preferably, the hole is drilled vertically, the hole depth is 13m, the diameter of the hollow hole 9 is 120mm, and the distance between the hollow hole 9 and the wave-blocking hole 7 is 2.5 m.
And 5: the energy-gathering and energy-dissipating blaster is prepared, the energy-gathering angle 4 is positioned at the center of a circle, and cavities A1 and B2 are symmetrically arranged, as shown in figure 1.
Preferably, the energy-gathering and energy-dissipating blaster has the diameter of 100mm, the wall thickness of 3mm and the energy-gathering angle 4 of 30 degrees.
Step 6: water is filled in an energy-gathering cavity 3 of a part of energy-gathering and energy-dissipating blasters, and explosives are filled in cavities A1 and B2; the other part of the energy-gathering and energy-dissipating blaster cavity A1 is filled with explosives, and the cavity B2 and the energy-gathering cavity 3 are filled with energy-dissipating substances such as rubber pads and the like.
As a preferred scheme, the explosive adopts powdery emulsion explosive, so that the explosive is convenient to charge.
And 7: common explosives are loaded into a blast hole 6 of a main explosion area, energy-gathering and energy-dissipating blasters with cavities A1 and B2 filled with explosives are loaded into a wave-blocking hole 7, and a blaster with only cavity A1 filled with explosives is loaded into an energy-dissipating hole 8.
Preferably, the linear explosive loading density of the blast holes 6 in the main explosion area is 8.6kg/m, the linear explosive loading density of the wave-resisting holes 7 is 6.45kg/m, and the linear explosive loading density of the energy dissipation holes 8 is 4.3 kg/m. For the wave-blocking hole 7, the energy-gathering direction is parallel to the contour line; for the energy dissipation hole 8, the cavity A1 faces the main explosion area 5, the cavity B2 faces the reserved rock mass 10, and the energy gathering direction is parallel to the contour line;
and 8: and (3) blocking the blast hole by using water stemming, wherein the blocking length is 25-40 times of the diameter of the blast hole.
Preferably, all blast holes are plugged by 3 m.
And step 9: and (4) connecting blast holes, and detonating by using a differential method. The wave-damping holes 7 are initiated first, then the blast holes 6 in the main explosion area are initiated row by row in the direction shown in figure 2, and finally the energy-dissipating holes 8 are initiated.
As a preferred scheme, a millisecond delay detonating tube detonator priming network in a hole is adopted, 2-section 25ms delay detonators are adopted in the hole, and 5-section 110ms delay detonators are arranged in the hole. The wave-damping holes 7 are detonated firstly, the detonation time is 25ms, then the blast holes 6 in the main detonation zone are detonated row by row according to the direction shown in figure 2, the detonation time is 135ms, 245ms and 355ms respectively, the energy-dissipating holes 8 are detonated finally, and the detonation time is 465 ms.
Step 10: after 15min the post-detonation conditions were checked.
In summary, in the blasting method for reducing the blasting hazard effect provided by the embodiment, the wave-blocking hole 7 is located at a safe distance from the reserved rock mass 11, so that the reserved rock mass is prevented from being directly damaged; the wave-resisting hole 7 is firstly detonated to form a directional crack 11, so that the explosion crack and stress wave generated by the explosion of the blast hole 6 in the main explosion area are prevented from propagating to the reserved rock body 10; the hollow holes 9 at the two ends of the wave-damping hole 7 can inhibit the directional crack 11 from generating wing cracks which extend to the reserved rock mass; the energy-gathering and energy-dissipating blasters in the energy-dissipating holes 8 can absorb the energy transmitted to the reserved rock mass by the explosion of the energy-dissipating holes 8; meanwhile, after the wave-resisting hole 7 and the main explosion area blast hole 6 are exploded, a displacement space is provided for the final detonating energy dissipation hole 8, the explosion energy is guided to propagate towards the explosion area, and the propagation towards the reserved rock body 10 is reduced. In one blasting scheme, multiple methods of directional crack wave blocking, energy absorbing substance wave absorbing, hollow hole suppression of wing crack initiation, displacement space guide energy propagation and the like are overlapped and applied, so that the blasting hazard effect is greatly reduced.
The above description is only a further embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and its idea within the scope of the present invention.
Claims (7)
1. A wave-blocking energy-dissipating based damage effect reduction blasting method is characterized by comprising the following steps:
step 1: arranging blast holes
Arranging a main explosion area blast hole (6), a wave damping hole (7), an energy dissipation hole (8) and a hollow hole (9) on an exploded working surface according to the explosion design;
step 2: preparing energy-gathering and energy-dissipating blasting device
The energy-gathering and energy-dissipating blaster is a blaster with a charging structure and two purposes of energy gathering and energy dissipating, the material of the blaster is hard PVC, the energy-gathering and energy-dissipating blaster comprises two closed energy-gathering cavities (3), a cavity A (1) and a cavity B (2), and an energy-gathering angle (4) is 15-45 degrees;
and step 3: explosive, water and energy-dissipating material are filled into energy-gathering and energy-dissipating blasting device
Water is filled in an energy accumulation cavity (3) of the energy accumulation-dissipation blaster, and explosives are filled in cavities A (1) and B (2), so that the energy accumulation-dissipation blaster has an energy accumulation effect; the energy-gathering and energy-dissipating blaster is characterized in that explosives are filled in a cavity A (1) of the energy-gathering and energy-dissipating blaster, energy-dissipating substances are filled in a cavity B (2) and an energy-gathering cavity (3), and the energy-dissipating substances are rubber pads, so that the energy-gathering and energy-dissipating blaster has an energy-dissipating effect;
and 4, step 4: medicine charge
Filling explosives into blast holes of a main explosion area, and filling energy-gathering and energy-dissipating blasters filled with the explosives into a wave-blocking hole (7) and an energy-dissipating hole (8);
and 5: blocking blast holes by using water stemming, wherein the blocking length is 25-40 times of the diameter of each blast hole;
step 6: and (4) connecting blast holes, and detonating by using a differential method.
2. The wave-damping and energy-dissipating based damage effect reducing blasting method according to claim 1, wherein in the step 1, the energy dissipating holes (8) are arranged on the excavation contour line, the wave-damping holes (7) are arranged in a row between the blast holes (6) of the main blasting area and the energy dissipating holes (8), and the row distance between the wave-damping holes (7) and the energy dissipating holes (8) is 0.75 times that of the blast holes (6) of the main blasting area; the hole pitch of the blast holes (6) in the main explosion area is 30-50 times of the diameter of the blast holes, the hole pitch of the wave-damping holes (7) is the same as that of the blast holes (6) in the main explosion area, and the hole pitch of the energy dissipation holes (8) is 0.75 times of that of the blast holes (6) in the main explosion area.
3. A wave-damping and energy-dissipating based blasting method for reducing the harmful effect as defined in claim 1, wherein in step 1, the hole depth of the wave-damping hole (7) is 1.1 times as deep as the blast hole (6) of the main blast area, and the hole depth of the energy-dissipating hole (8) is the same as the blast hole (6) of the main blast area.
4. A wave-damping and energy-dissipating based blasting method for reducing the harmful effect according to claim 1, wherein in step 1, the holes (9) are located at both ends of a wave-damping hole (7), and the hole distance between the holes (9) and the wave-damping hole (7) is half of the hole distance between the wave-damping holes (7).
5. The wave-damping and energy-dissipating based blasting method for reducing the harmful effect according to claim 1, wherein in step 4, an energy-collecting and energy-dissipating blaster with energy collecting function is installed in the wave-damping hole (7), and the energy collecting direction is parallel to the excavation contour line; the energy-gathering and energy-dissipating blaster with the energy dissipating function is arranged in an energy dissipating hole (8), a cavity B (2) provided with a rubber pad faces one side of a reserved rock body, and a cavity A (1) provided with explosives faces one side of a main blasting area.
6. The wave choke-energy dissipation based damage effect reduction blasting method according to claim 1, wherein in the step 4, the loading amount of the wave choke hole (7) is 0.75 times of that of the blast hole (6) in the main blasting area, and the loading amount of the energy dissipation hole (8) is 1/2 times of that of the wave choke hole (7).
7. A wave-damping and energy-dissipating based damage effect reducing blasting method according to claim 1, wherein in step 6, the differential initiation is that the wave-damping holes (7) are initiated in rows first, then the blast holes (6) in the main blast area are initiated in rows, and the energy-dissipating holes (8) are initiated finally.
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| CN103234404A (en) * | 2013-05-03 | 2013-08-07 | 贵州新联爆破工程集团有限公司 | Blasting vibration control method |
| CN203385336U (en) * | 2013-07-23 | 2014-01-08 | 内蒙古康宁爆破有限责任公司 | Blast vibration absorbing belt |
| CN104990471B (en) * | 2015-07-22 | 2017-04-19 | 中国矿业大学(北京) | Extremely short-range blasting construction vibration absorbing method and vibration absorbing and energy gathering lancing cartridge |
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