CN206235254U - Soft rock monoblock type bias double buffering bed course joint-cutting cumulative presplit blasting device - Google Patents
Soft rock monoblock type bias double buffering bed course joint-cutting cumulative presplit blasting device Download PDFInfo
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- CN206235254U CN206235254U CN201620619698.XU CN201620619698U CN206235254U CN 206235254 U CN206235254 U CN 206235254U CN 201620619698 U CN201620619698 U CN 201620619698U CN 206235254 U CN206235254 U CN 206235254U
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Abstract
The utility model discloses soft rock monoblock type bias double buffering bed course joint-cutting cumulative presplit blasting device, it includes：One monoblock type joint-cutting pipe, the joint-cutting symmetrical joint-cutting of pipe spaced radial；One semi-circular tube piece, the section of jurisdiction collectively forms semilune air cushion with joint-cutting pipe outer wall；The charge constitution of one " the intensive point-like distribution of subdivision pack ", joint-cutting inner axial tube interval filling subdivision explosive, a primacord, the explosion velocity primacord high is located at the center of joint-cutting pipe；One electrician's glue is fixed, and joint-cutting pipe, primacord and the fried Medical adhesive plaster of subdivision are fixed；One presplit blasting networking.The utility model device can apply to the blasthole of presplitting (smooth surface) explosion of various bores, suitable for various complicated massif vcehicular tunnels or railway, water power and the various tunnels of underground space engineering, cave depot blast workings such as turquoise, hard stone, secondary hard stones.It is particularly well-suited to the relatively low profile controlled blasting blast working of joint fissure comparative development, Surrounding Rock Strength.
Description
Technical field
The utility model is related to a kind of demolition set, and in particular to soft rock monoblock type bias double buffering bed course joint-cutting cumulative is pre-
Split demolition set.
Background technology
Exist in the tunnel routine profile controlled blasting construction of current China drill bursting construction main not enough：
(1) the outer limb of universal periphery hole is bigger than normal, and the distribution of periphery hole charge constitution explosive energy is not reasonable, not enough refinement,
For example quick-fried raw Crack Extension scope of explosion secondary harm is big, blast disturbance big, causes explosion to crush circle and rupture excessive, the periphery hole of circle
Live powder charge management is not in place, random too big, special processing periphery hole pack, backbreaks, chip off-falling, rock burst even cave in accident
Happen occasionally, get rid of the danger, mend big gun, first branch, two lining workloads greatly, have a strong impact on construction quality, safety, progress, cost control.
(2) explosive energy is axially distributing rough along blasthole, not uniform reasonable enough.Whole blasthole axial energy distribution will
Local dose is too big, and such as bottom hole dose is bigger than normal, causes comminuted destruction；Local wretched insufficiency, aperture dose deficiency is made
Into hanging hole；Country rock concave-convex sense and canine tooth situation are more prominent；So that profile controlled blasting quality is subject to extreme influence；
(3) explosive energy utilization rate is low, and periphery hole profile control effect belongs to indifference explosion, no matter to profile inner side rock
Body still needs the quick-fried shoulder bed effects power removed all to profile outside, under conditions of the dispersed effect of energy, contour line
Capacity usage ratio on direction than relatively low, to the disturbance for causing of country rock also than larger, it is impossible to form country rock inside arch bridge effect,
Security risk is high；
(4) the control quality of Tunnel Overbreak ＆ Underbreak will directly affect construction advance of working cycle, owe to dig and hanging hole causes to mend big gun；Backbreak
The hidden loss for bringing is big, brings and bores quick-fried digging fortune quantities increase, just props up two lining concrete backfill amounts and sharply increases, and causes construction cost
Sharply increase；" seized by the throat " outstanding problem as restriction enterprise operation cost risk.
Utility model content
It is not enough that the purpose of this utility model is directed to the above, there is provided a kind of effectively to shorten the periphery hole powder charge time, work of constructing
Phase is shorter, explosive usage amount is relatively low, explosive energy utilization rate is high, profile control effect is good, and effective control over-excavation, safe mass has
Ensure, work efficiency is high, energy-conserving and environment-protective soft rock monoblock types bias double buffering bed course joint-cutting cumulative presplit blasting device.
The technical solution of the utility model is as follows：
Soft rock monoblock type bias double buffering bed course joint-cutting cumulative presplit blasting device, it is characterised in that including：
Joint-cutting pipe (1), joint-cutting pipe (1) is preferably with 2mm thicknessPipe.Cut at joint-cutting pipe (1) radial symmetric interval
Seam meter, joint-cutting (1-1) width 2-3mm, length 1.0-1.2m, joint-cutting pipe (1) two is left to few 10cm not joint-cuttings, front and rear joint-cutting
8-12cm is spaced between (1-1)；Powder stick is interval with joint-cutting pipe；
Primacord (2) is set vertically in joint-cutting pipe (1)；
And including a semi-circular tube piece (9), the side of joint-cutting pipe (1), semicanal section of jurisdiction are fixed in described semicircle section of jurisdiction (9)
(9) air cushion (10) is formed and joint-cutting pipe (1) between；
Wherein, the joint-cutting of joint-cutting pipe (1) is parallel with tunnel contour line direction, and each periphery hole (6) interior primacord (2) expose
Part, it is ensured that length 20cm be connected that primacord (7) is positive to be turned round fried dough twist and connect and use adhesive plaster (4) winding, detonating capsule (5)
It is connected with primacord (7) forward direction.Primacord propagation of explosion direction is at 120 ° -180 °.
In a preferred embodiment, the distance between front and rear joint-cutting interval and joint-cutting and tube end are 10cm.
In a preferred embodiment, semicircle section of jurisdiction is cut from 2mm thicknessPipe is half-and-half cut into along axis
Semicircle section of jurisdiction.
In a preferred embodiment, 100g powder sticks (3-1) and 50g powder sticks (3-2) are respectivelyEmulsion be cut into
The sections of 4 sections or 2 sections.
In a preferred embodiment, powder charge blocks the stemming that a strip is machined to using special stemming, and stemming is aqueous
Amount control
System is 20% or so.
In a preferred embodiment, presplit blasting networking, periphery hole is earlier than the presplit blasting networking that cushion hole detonates.
The main blast mechanism of the utility model device and effect
The utility model demolition set uses " joint-cutting pipe+semicircle section of jurisdiction+air cushion+subdivision pack+primacord+electrician
Glue fixes+presplit blasting networking " formed monoblock type quick-burning charge presplit blasting device, can quickly improve the periphery hole of working face
Powder charge work efficiency, more quick-fried than conventional light work efficiency improves 5%-10%, and joint-cutting pipe ensures demolition set globality, and convenient transport can be fast
Quick-mounting medicine, subdivision pack ensures that charging accuracy and blasting energy are rationally uniformly distributed, and electrician's glue is fixed and can ensure that subdivision pack essence
Really it is fixed on specified location, it is ensured that blasting energy spatial distribution, it is ensured that smooth demolition effect.
The utility model device introduces joint-cutting PVC can medium, utilization " the subdivision intensive point-like of pack as constraints, biography
Distribution " charge constitution reasonable layout energy, symmetrical structure and the axial blasting energy of change are distributed in itself to change pipe by joint-cutting
Situation, makes joint-cutting parallel with tunnel contour line direction, changes radial direction blasting energy distribution situation.Joint-cutting is led to blasting energy cumulative
To the characteristic of effect, CUMULATIVE BLASTING principle is effectively used, when explosive charge, there is some strength and flexible and smooth pvc pipe
So that blasting energy collects and boost rapidly to low-pressure area between two section explosives first, it is poly- that joint-cutting is oriented guiding to blasting energy
Can, blasting energy is preferentially discharged at joint-cutting, produce high speed and high pressure " gas wedge ", " gas wedge " cutting to be carried out to rock mass and forms tip
The destruction of fracture area, produces guiding crackle, " gas wedge " to invade guiding crackle, keeps enough energy to maintain crackle to orient extension；
Cut blasting is carried out the country rock between two blastholes, the beneficial energy of explosion is improved；And smooth PVC joint-cutting pipes are close to the thickness of country rock
The semicircle section of jurisdiction of 2mm and joint-cutting pipe and semi-moon shaped air cushioning bed course is collectively formed therewith can be considered as buffering protection pad, because of sky
Chamber extends blasting agential time, reduces blasting impact crest value to the protection comminuted destruction of country rock, and the explosion of high intensity is moved
Compression arch bridge so that the Crack Extension inside protected country rock obtains the relative integrality for suppressing, improving country rock, also improves
The bearing capacity of protection country rock, weakens Blasting shock wave and the blast disturbance of contoured surface country rock is damaged, and alleviates explosion backlash
Effect.So as to improve the safety in tunnel, reduce tunnel rock burst and cave-in accident occurs.It is more beneficial for subtracting using Pre-splitting Blasting Technique
Shao Zhubao areas explosion secondary disaster.
Cushion hole (two circle eyes), prior to periphery hole detonation, after periphery hole explosion, forms the precracking along contoured surface,
The quick-fried raw crackle that the quick-fried block transitive of master can effectively be intercepted further extends to contoured surface, blast disturbance is intercepted, while two not quick-fried circles
The axial compression stress arch bridge effect of the internal stress redistribution of eye portion rock mass, promotion is divided again by protection contoured surface country rock internal stress
During cloth from steady function, improve the stability of contoured surface country rock, so as to increased heel row drillhole blasting construction security.
Seen from the above description, the utility model provides a kind of new device, and it includes a monoblock type joint-cutting pipe, and this is cut
The symmetrical joint-cutting of slit-tube spaced radial；Joint-cutting pipe ensures demolition set globality, and convenient transport can quick-burning charge；One semi-circular tube piece,
The section of jurisdiction collectively forms semilune air cushion with joint-cutting pipe outer wall, the infringement for buffer shooting shock wave to protection country rock,
Reduce blast disturbance；The charge constitution of one " the intensive point-like distribution of subdivision pack ", joint-cutting inner axial tube interval filling subdivision is fried
Medicine, subdivision pack ensures that charging accuracy and blasting energy are rationally uniformly distributed, and a primacord, the explosion velocity primacord high is located at and cuts
The center of slit-tube；One electrician's glue is fixed, and joint-cutting pipe, primacord and the fried Medical adhesive plaster of subdivision are fixed, and can ensure that subdivision pack
Accurately it is fixed on specified location, it is ensured that blasting energy spatial distribution, it is ensured that Pre-splitting Blasting Effect；One presplit blasting networking, periphery
Hole is more beneficial for reducing disturbance of the explosion to protecting country rock earlier than the presplit blasting networking that cushion hole detonates, and reduction is backbreak.This reality
The blasthole of presplitting (smooth surface) explosion of various bores can be applied to new device, it is each suitable for turquoise, hard stone, secondary hard stone etc.
Plant complicated massif vcehicular tunnel or railway, water power and the various tunnels of underground space engineering, cave depot blast working.It is particularly well-suited to section
The relatively low profile controlled blasting blast working of reason crack comparative development, Surrounding Rock Strength.The utility model soft rock monoblock type is eccentric double
Cushion joint-cutting cumulative presplit blasting device, registration, easy construction, explosive energy quick with live periphery hole powder charge
Measure utilization rate high, low integrated cost expense, safety and quality are guaranteed, work efficiency is high, the advantages of putting into economical rationality of constructing：
(1) it is applied widely, be able to can also apply to using each in various geological conditions tunnel presplit blasting construction usages
Plant the blasthole of presplit blasting, particularly suitable Tunnel Blasting engineering construction；
(2) simple to operation, using common pvc pipe as raw material as device, material is easily purchased, and is easily installed；
(3) device becomes more meticulous flowing water processing for monoblock type batch production, it is to avoid pre- ceasma powder charge is random, and working procedure is carried
Refining is preposition, and subduction working face processes pre- ceasma pack operation, and work efficiency can improve more than 5% compared with conventional Tunnel Blasting, greatly
It is big to improve working face efficiency；
(4) using 2mm thickness joint-cutting pipe and semicircle sections of jurisdiction and the semilune air cushion for collectively forming therewith, protection pad is formed quick-fried
It is broken, weaken explosion of the Blasting shock wave to contoured surface country rock and damage, while using rock dynamic load compression strength is high, tensile strength is low
The characteristics of, can more effectively control the explosion of tunnel contour face to backbreak, tunnel contour face is more smooth；
(5) new soft rock monoblock type bias double buffering bed course joint-cutting cumulative presplit blasting device utilizes the spy of joint-cutting cumulative
Property, Cut blasting is carried out to the country rock in joint-cutting direction, the beneficial energy of explosion is improved, explosion backlash effect is alleviated, explosion dynamic pressure should
Power arch bridge improves the stability of country rock, so as to increased the security of heel row drillhole blasting construction；
(6) due to changing charge constitution, increasing joint-cutting blasting energy guide effect, it is pre- that performance does not axially couple joint-cutting cumulative
Split demolition set " cumulative " effect and explosion dynamic pressure " stress arch bridge effect ", promote explosive energy rationally utilize, periphery hole away from
Up to 80cm, still profile control effect very well, such that it is able to reduce drilling amount, can reduce single cycle drilling depth periphery hole count, reduce thunder
Pipe, explosive usage amount；
(7) it is more beneficial for reducing Zhu Bao area's explosion secondary disasters using Pre-splitting Blasting Technique.Cushion hole (two circle eye) prior to
Periphery hole detonates, and after periphery hole explosion, forms the precracking along contoured surface, can effectively intercept the quick-fried life of the quick-fried block transitive of master
Crackle further extends to contoured surface, intercepts blast disturbance, while the internal stress redistribution of two not quick-fried circle eye portion rock mass
Axial compression stress arch bridge effect, promote by protection contoured surface country rock internal stress redistribution when from steady function, improve profile
The stability of face country rock.
(8) same drilling depth is reached with conventional blasting method, bedrock surface is smooth, substantially, phenomenon of backbreaking is greatly lowered half bore；Thus
Greatly reduce and backbreak, so that reducing just branch two serves as a contrast concrete backfill amount, reduce entire society's energy consumption, reduce cement production enterprise to ring
The pollution in border, alleviates burden of the carbon emission to global greenhouse effect, greatly improves social benefit.
Brief description of the drawings
Fig. 1 is the utility model device joint-cutting tubular construction schematic diagram；
Fig. 2 is the utility model device schematic cross section；
Fig. 3 is the utility model device charge constitution schematic diagram；
Fig. 4 is the utility model device assembling schematic diagram in blasthole；
Fig. 5 is the pre- ceasma horizontal layout schematic diagram of the utility model.
Specific embodiment
Referring to Fig. 1 to Fig. 5
Soft rock monoblock type bias double buffering bed course joint-cutting cumulative presplit blasting device, it includes：Joint-cutting pipe 1 and it is coated on
Semicircle section of jurisdiction 9 outside joint-cutting pipe 1.
Joint-cutting pipe 1 is from 2mm thicknessPipe.The radial symmetric of joint-cutting pipe 1 interval joint-cutting design, joint-cutting 1-1 is wide
2-3mm, length 1.0-1.2m, two of joint-cutting pipe 1 are left to few 10cm not joint-cuttings, and 8-12cm is spaced between front and rear joint-cutting 1-1；Cut
Primacord 2 is set vertically in slit-tube 1.
100g powder stick 3-1 are installed in the position of the bottom of joint-cutting pipe 1, with immobilization with adhesive tape, second segment dress 50g powder stick 3-2, with bottom
Powder charge is since Section three and fills 50g powder stick 3-2 at interval of 20cm at intervals of 10-30cm, until aperture position, using cutting
With primacord 2 be compacted emulsion into two sections of jurisdiction by slit, and fixes joint-cutting pipe with electrician's glue, and 20- is blocked in orifice position
The stemming 8 of 30cm length；
Wherein, the joint-cutting of joint-cutting pipe 1 is parallel with tunnel contour line direction, the portion that primacord 2 exposes in each periphery hole 6
Point, it is ensured that length 20cm is connected and wound using adhesive plaster 4 with the positive torsion fried dough twist of primacord 7 be connected, detonating capsule 5 and primacord 7
Forward direction connection.Primacord propagation of explosion direction is at 120 ° -180 °.
In a preferred embodiment, the distance between front and rear joint-cutting interval and joint-cutting and tube end are 10cm.
In a preferred embodiment, semicircle section of jurisdiction is cut from 2mm thicknessPipe is half-and-half cut into along axis
Semicircle section of jurisdiction.
In a preferred embodiment, 100g powder sticks 3-1 and 50g powder stick 3-2 is respectivelyEmulsion be cut into 4 sections
Or 2 section sections.
In a preferred embodiment, powder charge blocks the stemming that a strip is machined to using special stemming, and stemming is aqueous
Amount control
System is 20% or so.
In a preferred embodiment, presplit blasting networking, periphery hole is earlier than the presplit blasting networking that cushion hole detonates.
In the utility model device, joint-cutting pipe 1 is critical piece.From have certain flexibility, anti-flammability, it is antistatic, constraint
Moderate strength, reasonable cost performance, economic pvc pipe, according to rock Protodyakonov coefficient and joint fissure degree, the traditional thread binding medicine of design
Density.Joint-cutting pipe keep its structure and hardness in itself to the reasonable design of constraint cumulative ability and the Slit shape of mold of blasting energy extremely
Close important.According to engineering practice, from thickness 2mm'sPipe, its overall structure is constrained blasting energy than more uniform
Directional guide effect is preferable, and joint-cutting can reach bilateral cumulative energy dissection again.
Joint-cutting pipe 1 is guarantee rigidity and globality, and the joint-cutting design of bi-directional symmetrical interval is added using cutting machine repacking cutting
Work, width of slit 2-3mm, slot length is 1.0-1.2m, and two and middle part are spaced 10cm, facilitates device to make and positioning.
Semicircle section of jurisdiction 9 is from thickness 2mm'sPipe, according to correlative study, its overall structure than more uniform, its with
Joint-cutting pipe and the semilune air cushion 10 for constituting therewith have good cushioning effect to Blasting shock wave.Semicircle section of jurisdiction 9 and cut
Slit-tube 1 is isometric, the parallel side for being affixed on joint-cutting pipe 1, and the both sides joint-cutting 1-1 of joint-cutting pipe 1 is not covered by semicircle section of jurisdiction 9, and two
Lateral incision seam 1-1 is located at the distance of two side one of semicircle section of jurisdiction 9.Immobilization with adhesive tape is used between semicircle section of jurisdiction 9 and joint-cutting pipe 1.
Device Machining
(1) usePipe bi-directional symmetrical cut-space；
(2) primacord (0.5m-1.0m more long than blast hole depth) of prior well cutting appropriate length is loaded in all slit-tubes；
(3) according to country rock grade and intensity, periphery hole single hole explosive payload (blasting parameter should be according to the adjustment of examination big gun) is determined, willEmulsion axially cuts into 4 sections, and 100g powder sticks are installed in the position in bottom hole portion, with immobilization with adhesive tape, second segment
Powder stick fills 50g and is spaced 10-30cm with base charge, interval 20cm is since Section three, 50g explosives are refilled, until aperture
Position, forms two sections of jurisdiction and is compacted emulsion and primacord, and fix joint-cutting pipe 1 and semicircle section of jurisdiction with electrician's glue using joint-cutting
9。
Demolition set blast working flow
(1) drill.
(2) after demolition set transports to blast working scene, handle with care, with breakage-proof.
(3) note allowing device joint-cutting to be directed at blasthole line direction according to blast working design, during powder charge, if necessary may be used
It is appropriate to correct joint-cutting direction, it is ensured that by protection contoured surface side, then gently push-in allows device to reach bottom hole position for semicircle section of jurisdiction
Put；
(4) block the stemming of 20-30cm length in orifice position and consolidate；
(5) blasting circuit connection, inspection, finally detonate.(using periphery hole earlier than the presplit blasting net that cushion hole detonates
Road.)
A specific embodiment of the present utility model is above are only, but design concept of the present utility model is not limited to
This, all changes for carrying out unsubstantiality to the utility model using this design all should belong to infringement the utility model protection domain
Behavior.
Claims (7)
1. soft rock monoblock type bias double buffering bed course joint-cutting cumulative presplit blasting device, it is characterised in that including：
Joint-cutting pipe (1), the joint-cutting design of joint-cutting pipe (1) radial symmetric interval, joint-cutting (1-1) width 2-3mm, length 1.0-1.2m cut
Slit-tube (1) two is left to few 10cm not joint-cuttings, and 8-12cm is spaced between front and rear joint-cutting (1-1)；Medicine is interval with joint-cutting pipe
Volume；Primacord (2) is set vertically in joint-cutting pipe (1)；
And including a semi-circular tube piece (9), the side of joint-cutting pipe (1), semicanal section of jurisdiction (9) are fixed in described semicircle section of jurisdiction (9)
Air cushion (10) is formed and joint-cutting pipe (1) between；
Wherein, the joint-cutting (1-1) of joint-cutting pipe (1) is parallel with tunnel contour line direction, each the interior primacord of pre- ceasma (6) (2) dew
The part for going out, it is ensured that length 20cm is connected and used adhesive plaster (4) to wind with the positive torsion fried dough twist of primacord (7) is connected, detonating capsule
(5) be connected the positive connection of primacord (7).
2. soft rock monoblock type as claimed in claim 1 bias double buffering bed course joint-cutting cumulative presplit blasting device, its feature exists
In semicircle section of jurisdiction (9) and joint-cutting pipe (1) are isometric, and two ends alignment each other is fixed together.
3. soft rock monoblock type as claimed in claim 1 bias double buffering bed course joint-cutting cumulative presplit blasting device, its feature exists
In the joint-cutting (1-1) of joint-cutting pipe (1) is not coated by semicanal section of jurisdiction (9).
4. soft rock monoblock type as claimed in claim 1 bias double buffering bed course joint-cutting cumulative presplit blasting device, its feature exists
In 100g powder sticks (3-1) is installed in the position of joint-cutting pipe (1) bottom, and with immobilization with adhesive tape, second segment fills 50g powder sticks (3-2), the bottom of with
Portion's powder charge is since Section three and fills 50g powder sticks (3-2) at interval of 20-30cm at intervals of 5-20cm, until aperture position,
And joint-cutting pipe is fixed with electrician's glue, block the stemming (8) of 20-30cm length in orifice position.
5. soft rock monoblock type as claimed in claim 1 bias double buffering bed course joint-cutting cumulative presplit blasting device, its feature exists
In the semicircle section of jurisdiction (9) is 2mm thicknessThe semicircle section of jurisdiction that pipe is half-and-half cut into along axis.
6. soft rock monoblock type as claimed in claim 1 bias double buffering bed course joint-cutting cumulative presplit blasting device, its feature exists
It is respectively in 100g powder sticks (3-1) and 50g powder sticks (3-2)Emulsion be cut into 4 sections or 2 section sections.
7. the eccentric double buffering bed course joint-cutting cumulative presplit blasting device of soft rock monoblock type as described in any one of claim 1 to 6,
Characterized in that, connection primacord (7) propagation of explosion direction is at 120 ° -180 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620619698.XU CN206235254U (en) | 2016-06-21 | 2016-06-21 | Soft rock monoblock type bias double buffering bed course joint-cutting cumulative presplit blasting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620619698.XU CN206235254U (en) | 2016-06-21 | 2016-06-21 | Soft rock monoblock type bias double buffering bed course joint-cutting cumulative presplit blasting device |
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| Publication Number | Publication Date |
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| CN206235254U true CN206235254U (en) | 2017-06-09 |
Family
ID=58986419
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| CN201620619698.XU Active CN206235254U (en) | 2016-06-21 | 2016-06-21 | Soft rock monoblock type bias double buffering bed course joint-cutting cumulative presplit blasting device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061495A (en) * | 2017-10-24 | 2018-05-22 | 中国矿业大学 | A kind of breast wall apparatus and bore hole pressure test method |
| CN108278939A (en) * | 2018-01-25 | 2018-07-13 | 安徽理工大学 | A kind of blasting method for reducing rock convergence measure and reducing blasting vibration |
| CN109764782A (en) * | 2019-03-14 | 2019-05-17 | 中交隧道工程局有限公司 | A kind of fine blasting technique of smooth surface based on pre-powder charge |
| CN113154977A (en) * | 2021-05-21 | 2021-07-23 | 核工业南京建设集团有限公司 | Bidirectional symmetrical kerf charging structure and method for smooth blasting |
-
2016
- 2016-06-21 CN CN201620619698.XU patent/CN206235254U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061495A (en) * | 2017-10-24 | 2018-05-22 | 中国矿业大学 | A kind of breast wall apparatus and bore hole pressure test method |
| CN108061495B (en) * | 2017-10-24 | 2018-08-28 | 中国矿业大学 | A kind of breast wall apparatus and bore hole pressure test method |
| CN108278939A (en) * | 2018-01-25 | 2018-07-13 | 安徽理工大学 | A kind of blasting method for reducing rock convergence measure and reducing blasting vibration |
| CN108278939B (en) * | 2018-01-25 | 2019-11-05 | 安徽理工大学 | A kind of blasting method for reducing rock convergence measure and reducing blasting vibration |
| CN109764782A (en) * | 2019-03-14 | 2019-05-17 | 中交隧道工程局有限公司 | A kind of fine blasting technique of smooth surface based on pre-powder charge |
| CN109764782B (en) * | 2019-03-14 | 2021-03-02 | 中交隧道工程局有限公司 | Smooth surface fine blasting method based on pre-charging |
| CN113154977A (en) * | 2021-05-21 | 2021-07-23 | 核工业南京建设集团有限公司 | Bidirectional symmetrical kerf charging structure and method for smooth blasting |
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