CN106091848A - A kind of realize overlength, high inclination-angle tunnel anchorage tops bar the method for explosion - Google Patents
A kind of realize overlength, high inclination-angle tunnel anchorage tops bar the method for explosion Download PDFInfo
- Publication number
- CN106091848A CN106091848A CN201610452471.5A CN201610452471A CN106091848A CN 106091848 A CN106091848 A CN 106091848A CN 201610452471 A CN201610452471 A CN 201610452471A CN 106091848 A CN106091848 A CN 106091848A
- Authority
- CN
- China
- Prior art keywords
- hole
- explosion
- keyhole
- row
- volume
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses and a kind of realize overlength, high inclination-angle tunnel anchorage tops bar the method for explosion；It is characterized in that: comprise the following steps: (1) steel for shot；(2) charge constitution；(3) multiple-row blasting (4) initiation net design；By the enforcement of the present invention: 1, explosion carries out successively detonating and makes ophthalmic explosive to detonate smoothly thus reach more preferable demolition effect.2, during tunnel anchorage blast working, each segmentation anchor is wide open to be dug vibration and all will not impact the safety of leading anchor hole country rock.
Description
Technical field
The present invention relates to the explosion field in tunnel anchorage digging process, be specifically related to one and realize overlength, high inclination-angle tunnel
Anchor is topped bar method for excavating and blasting.
Background technology
At present, domestic tunnel anchorage uses drilling and blasting method to excavate mostly, and drill bursting construction is suitable for that geological conditions is wide, expense
Low, equipment is simple, but easily controls improper to cause that excavation face forming quality is poor, country rock because of blasting method for high inclination-angle tunnel anchorage
Disturbance is big.And after tunnel anchorage applies this technology to carry out Blasting Excavation, the most significant advantage is to efficiently control blast action, from
And reduce the disturbance to country rock, keep stablizing of country rock, give full play to the self-supporting of country rock, it is ensured that construction safety.
Summary of the invention
It is an object of the invention to provide a kind of utilize explosion to realize overlength, high inclination-angle tunnel anchorage tops bar the side of excavation
Method；Make excavation border form smooth, smooth-going interface, reduce and backbreak and owe to dig, keep integrity and the stability of country rock, thus protect
Card construction safety is the most cost-effective.
The present invention is achieved in that structure a kind of realizes overlength, high inclination-angle tunnel anchorage tops bar the method for explosion, and it is special
Levy and be: comprise the following steps:
Step one: steel for shot:
1), top bar burn cut hole and auxiliary keyhole use rectangular arrangement, hole depth is 2.0m.The upper and lower array pitch of keyhole
0.5m, the aperture of every pair of keyhole, away from 2.6m, is 61 ° with face angle；Auxiliary keyhole upper and lower array pitch 0. 65m, every pair auxiliary
Help the aperture in hole away from for 3.2m, be 82 ° with face angle；
2), driving hole, top be semicircular arc arrange, hole depth is 2.0m, often circle driving hole pitch-row about 1.0 ~ 1.2m, respectively arrange pick
Array pitch 0.9 ~ the 1.0m of inlet hole；
3), periphery bright finish blast hole is along 0.05m layout, its bore angle and face angle inside excavation border or border about
It is 1 ~ 2 °, tilts the most laterally, fall within the bottom of hole on excavation border；
Step 2: charge constitution:
In addition to periphery hole, Φ 32mm, the powder stick of a length of 200mm, monovolume quality 150g are selected in design；Φ is selected in periphery hole design
25mm, the powder stick of a length of 200mm, monovolume quality 100g, keyhole design explosive payload is volume 7；Auxiliary keyhole design powder charge
Amount is volume 6；Design dose in driving hole is volume 5；Light blast hole explosive payload is volume 3 Φ 25mm, the powder stick of a length of 200mm, all
In big gun hole all uses indirect initiation method to ignite hole, explosive, i.e. primer [cartridge] are placed in bottom big gun hole；
Step 3: multiple-row blasting:
Multiple-row blasting uses proportioning to be the clay of 1:3 and the mixture of fine sand or the blocking of viscosity preferable clay, used by blocking
Tamper uses wooden or bamboo material making；
Step 4: initiation net designs:
1) explosion of topping bar is that homogeneous segmentation is detonated, and firing order is: assisted keyhole, driving by middle cut hole to outside
Hole, bottom plate hole, periphery hole short delay detonate, and the short-delay time minimum interval of adjacent row is 50 milliseconds, last row's driving hole
It is not less than 100 milliseconds with the short-delay time in photoface exploision hole；
2) Zhu Bao district uses the nonel tube blasting circuit that homogeneous detonates, broken charges postpones, and uses with row (same to volume layer) big gun hole
With section blasting cap initiation, built-in 1 millisecond detonator in every hole, the detonator detonating capsule in all big gun holes uses bunch parallel way to connect,
The propagation of explosion detonator at networking uses electric cap or Nonel detonator blast to excite.
It is an advantage of the current invention that: the method for explosion that the present invention provides and a kind of realizes overlength, high inclination-angle tunnel anchorage is topped bar,
Make excavation border form smooth, smooth-going interface, reduce and backbreak and owe to dig, keep integrity and the stability of country rock, thus ensure
Construction safety is the most cost-effective.
The present invention compares traditional blasting method advantage:
1, explosion carries out successively detonating and makes ophthalmic explosive to detonate smoothly thus reach more preferable demolition effect.
2, during tunnel anchorage blast working, each segmentation anchor is wide open to be dug vibration and all will not make the safety of leading anchor hole country rock
Become impact.
Accompanying drawing explanation
Fig. 1 arranges facade layout drawing for blasting hole of topping bar
Fig. 2 is periphery bright finish blast hole charge constitution
Fig. 3 is explosion initiation net schematic diagram of topping bar.
Detailed description of the invention
Below in conjunction with accompanying drawing 1-3, the present invention is described in detail, carries out the technical scheme in the embodiment of the present invention
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole enforcement
Example.Based on the embodiment in the present invention, those of ordinary skill in the art are obtained under not making creative work premise
Every other embodiment, broadly falls into the scope of protection of the invention.
The method of explosion that the present invention provides and a kind of realizes overlength, high inclination-angle tunnel anchorage is topped bar, makes excavation border form light
Sliding, smooth-going interface, reduces and backbreaks and owe to dig, and keeps integrity and the stability of country rock, thus ensures construction safety and save into
This.
The specific embodiment of the invention be expanded on further below in conjunction with the accompanying drawings:
A kind of utilize explosion to realize tunnel anchorage to top bar the method for excavation, make excavation border form smooth, smooth-going interface, reduce super
Dig and owe to dig, keeping the integrity of country rock and stability, thus ensureing construction safety cost-effective.
Step one: steel for shot:
1), top bar burn cut hole and auxiliary keyhole use rectangular arrangement, hole depth is 2.0m.The upper and lower array pitch of keyhole
0.5m, the aperture of every pair of keyhole, away from 2.6m, is 61 ° with face angle；Auxiliary keyhole upper and lower array pitch 0. 65m, every pair auxiliary
Help the aperture in hole away from for 3.2m, be 82 ° with face angle.In figure, hole shown in 1 is the big gun hole of Drilling.
2) driving hole in top is that semicircular arc is arranged, hole depth is 2.0m, and often the pitch-row about 1.0 ~ 1.2m in circle driving hole, respectively arranges
Array pitch 0.9 ~ the 1.0m in driving hole.
3) periphery bright finish blast hole is arranged along 0.05m inside excavation border or border, and its bore angle presss from both sides with face
Angle is about 1 ~ 2 °, tilts the most laterally, falls within excavation border at the bottom of hole.
Step 2: charge constitution:
In addition to periphery hole, Φ 32mm, the powder stick of a length of 200mm, monovolume quality 150g are selected in design；Φ is selected in periphery hole design
25mm, the powder stick of a length of 200mm, monovolume quality 100g.Keyhole design explosive payload is volume 7；Auxiliary keyhole design powder charge
Amount is volume 6；Design dose in driving hole is volume 5；Light blast hole explosive payload is volume 3 Φ 25mm, the powder stick of a length of 200mm.All
In big gun hole all uses indirect initiation method to ignite hole, explosive, i.e. primer [cartridge] are placed in bottom big gun hole；I.e. in figure shown in 2.
Step 3: multiple-row blasting:
Multiple-row blasting uses proportioning to be the clay of 1:3 and the mixture of fine sand or the blocking of viscosity preferable clay.Used by blocking
Tamper uses wooden or bamboo material making.
Step 4: initiation net designs:
1), explosion of topping bar be that homogeneous segmentation is detonated, firing order is: assisted keyhole, driving by middle cut hole to outside
Hole, bottom plate hole, periphery hole short delay detonate.The short-delay time minimum interval of adjacent row is 50 milliseconds, last row's driving hole
It is not less than 100 milliseconds with the short-delay time in photoface exploision hole.
2), Zhu Bao district uses the nonel tube blasting circuit that homogeneous detonates, broken charges postpones.With row's (same to volume layer) big gun
Hole same section blasting cap initiation, built-in 1 millisecond detonator in every hole.The detonator detonating capsule in all big gun holes uses bunch parallel way even
Connecing, the propagation of explosion detonator at networking uses electric cap or Nonel detonator blast to excite.Want for reaching short-delay time between the row in each big gun hole
Ask, by Fig. 3 show sequence number 1.-2.-3.-4.-5.-6.-7.-8. order detonate.
The present invention carrys out ratio relative to traditional blasting method, has the advantage that
1, explosion carries out successively detonating and makes ophthalmic explosive to detonate smoothly thus reach more preferable demolition effect.
2, during tunnel anchorage blast working, each segmentation anchor is wide open to be dug vibration and all will not make the safety of leading anchor hole country rock
Become impact.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (1)
1. one kind realize overlength, high inclination-angle tunnel anchorage tops bar the method for explosion, it is characterised in that: comprise the following steps:
Step one: steel for shot:
1), top bar burn cut hole and auxiliary keyhole use rectangular arrangement, hole depth is 2.0m, the upper and lower array pitch of keyhole
0.5m, the aperture of every pair of keyhole, away from 2.6m, is 61 ° with face angle；Auxiliary keyhole upper and lower array pitch 0. 65m, every pair auxiliary
Help the aperture in hole away from for 3.2m, be 82 ° with face angle；
2), driving hole, top be semicircular arc arrange, hole depth is 2.0m, often circle driving hole pitch-row about 1.0 ~ 1.2m, respectively arrange pick
Array pitch 0.9 ~ the 1.0m of inlet hole；
3), periphery bright finish blast hole is along 0.05m layout, its bore angle and face angle inside excavation border or border about
It is 1 ~ 2 °, tilts the most laterally, fall within the bottom of hole on excavation border；
Step 2: charge constitution:
In addition to periphery hole, Φ 32mm, the powder stick of a length of 200mm, monovolume quality 150g are selected in design；Φ is selected in periphery hole design
25mm, the powder stick of a length of 200mm, monovolume quality 100g, keyhole design explosive payload is volume 7；Auxiliary keyhole design powder charge
Amount is volume 6；Design dose in driving hole is volume 5；Light blast hole explosive payload is volume 3 Φ 25mm, the powder stick of a length of 200mm, all
In big gun hole all uses indirect initiation method to ignite hole, explosive, i.e. primer [cartridge] are placed in bottom big gun hole；
Step 3: multiple-row blasting:
Multiple-row blasting uses proportioning to be the clay of 1:3 and the mixture of fine sand or the blocking of viscosity preferable clay, used by blocking
Tamper uses wooden or bamboo material making；
Step 4: initiation net designs:
1) explosion of topping bar is that homogeneous segmentation is detonated, and firing order is: assisted keyhole, driving by middle cut hole to outside
Hole, bottom plate hole, periphery hole short delay detonate, and the short-delay time minimum interval of adjacent row is 50 milliseconds, last row's driving hole
It is not less than 100 milliseconds with the short-delay time in photoface exploision hole；
2) Zhu Bao district uses the nonel tube blasting circuit that homogeneous detonates, broken charges postpones, and uses with row (same to volume layer) big gun hole
With section blasting cap initiation, built-in 1 millisecond detonator in every hole, the detonator detonating capsule in all big gun holes uses bunch parallel way to connect,
The propagation of explosion detonator at networking uses electric cap or Nonel detonator blast to excite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610452471.5A CN106091848B (en) | 2016-06-22 | 2016-06-22 | It is a kind of to realize overlength, the method for high inclination-angle tunnel anchorage top bar explosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610452471.5A CN106091848B (en) | 2016-06-22 | 2016-06-22 | It is a kind of to realize overlength, the method for high inclination-angle tunnel anchorage top bar explosion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106091848A true CN106091848A (en) | 2016-11-09 |
| CN106091848B CN106091848B (en) | 2018-03-27 |
Family
ID=57238491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610452471.5A Active CN106091848B (en) | 2016-06-22 | 2016-06-22 | It is a kind of to realize overlength, the method for high inclination-angle tunnel anchorage top bar explosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106091848B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915694A (en) * | 2018-07-03 | 2018-11-30 | 河南省水利第二工程局 | It the step tunneling boring unprotect layer tight-face blasting of tunnel lower layer and repairs the roads and protects logical construction method |
| CN110005434A (en) * | 2019-04-19 | 2019-07-12 | 中国矿业大学(北京) | A kind of constant resistance and large deformation anchor cable control method of soft rock tunnel country rock large deformation disaster |
| CN110006300A (en) * | 2019-04-26 | 2019-07-12 | 中建三局第三建设工程有限责任公司 | A kind of method of soft rock, high inclination-angle tunnel anchorage digital primer Blasting Excavation |
| CN110425950A (en) * | 2019-07-18 | 2019-11-08 | 三明学院 | A kind of nuclear waste disposal channel explosion vibration damping decreasing loss method and vibration monitor system |
| CN110440649A (en) * | 2019-08-09 | 2019-11-12 | 中铁隧道局集团有限公司 | Hydraulic drill ring drilling large cross-section tunnel steel for shot structure and blasting method |
| CN110608642A (en) * | 2019-09-20 | 2019-12-24 | 中铁二局第二工程有限公司 | Upper step bottom plate minimally invasive blasting structure and minimally invasive blasting excavation method for maintaining stability of tunnel steps |
| CN111521081A (en) * | 2020-05-26 | 2020-08-11 | 中建铁路投资建设集团有限公司 | Construction method for reducing explosion-control over-underproduction blasthole of inclined flat-curve tunnel |
| CN111912307A (en) * | 2020-07-23 | 2020-11-10 | 中交上海航道局有限公司 | Blasting excavation method of V-level surrounding rock large-section granite tunnel |
| CN112781459A (en) * | 2021-01-26 | 2021-05-11 | 中铁十八局集团有限公司 | Small-section water conservancy tuff tunnel overbreak control method |
| CN115854809A (en) * | 2022-12-08 | 2023-03-28 | 中铁十八局集团有限公司 | Blasting cartridge and blasting excavation method for tunnel of expansive weak surrounding rock |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120114A (en) * | 1994-07-13 | 1996-04-10 | 鲜京建设株式会社 | Method for excavating a working face |
| CN101936690A (en) * | 2010-08-30 | 2011-01-05 | 中铁十九局集团有限公司 | Compound wedge cut and repeated compound wedge cut construction process |
| CN101936687A (en) * | 2010-08-30 | 2011-01-05 | 中铁十九局集团第五工程有限公司 | Blasting construction method for submarine tunnel to penetrate complex building group in land area section |
| CN102494574A (en) * | 2011-12-07 | 2012-06-13 | 北京交通大学 | Combined blasting method of tunneling electronic detonator and detonator with shock-conducting tube |
| CN105605996A (en) * | 2016-01-28 | 2016-05-25 | 中交隧道工程局有限公司北京分公司 | Method for carrying out bench cut method construction in IV-grade surrounding rocks by using three-arm drill jumbo |
-
2016
- 2016-06-22 CN CN201610452471.5A patent/CN106091848B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120114A (en) * | 1994-07-13 | 1996-04-10 | 鲜京建设株式会社 | Method for excavating a working face |
| CN101936690A (en) * | 2010-08-30 | 2011-01-05 | 中铁十九局集团有限公司 | Compound wedge cut and repeated compound wedge cut construction process |
| CN101936687A (en) * | 2010-08-30 | 2011-01-05 | 中铁十九局集团第五工程有限公司 | Blasting construction method for submarine tunnel to penetrate complex building group in land area section |
| CN102494574A (en) * | 2011-12-07 | 2012-06-13 | 北京交通大学 | Combined blasting method of tunneling electronic detonator and detonator with shock-conducting tube |
| CN105605996A (en) * | 2016-01-28 | 2016-05-25 | 中交隧道工程局有限公司北京分公司 | Method for carrying out bench cut method construction in IV-grade surrounding rocks by using three-arm drill jumbo |
Non-Patent Citations (2)
| Title |
|---|
| 程康 等: "《岩石开挖工程爆破》", 31 January 2008, 武汉理工大学出版社 * |
| 罗亨文 等: "《坝陵河大桥西锚洞施工爆破关键技术》", 《黑龙江交通科技》 * |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915694A (en) * | 2018-07-03 | 2018-11-30 | 河南省水利第二工程局 | It the step tunneling boring unprotect layer tight-face blasting of tunnel lower layer and repairs the roads and protects logical construction method |
| CN110005434A (en) * | 2019-04-19 | 2019-07-12 | 中国矿业大学(北京) | A kind of constant resistance and large deformation anchor cable control method of soft rock tunnel country rock large deformation disaster |
| CN110006300B (en) * | 2019-04-26 | 2021-09-14 | 中建三局第三建设工程有限责任公司 | Blasting excavation method for soft rock and large-inclination-angle tunnel anchor digital detonator |
| CN110006300A (en) * | 2019-04-26 | 2019-07-12 | 中建三局第三建设工程有限责任公司 | A kind of method of soft rock, high inclination-angle tunnel anchorage digital primer Blasting Excavation |
| CN110425950A (en) * | 2019-07-18 | 2019-11-08 | 三明学院 | A kind of nuclear waste disposal channel explosion vibration damping decreasing loss method and vibration monitor system |
| CN110440649A (en) * | 2019-08-09 | 2019-11-12 | 中铁隧道局集团有限公司 | Hydraulic drill ring drilling large cross-section tunnel steel for shot structure and blasting method |
| CN110608642A (en) * | 2019-09-20 | 2019-12-24 | 中铁二局第二工程有限公司 | Upper step bottom plate minimally invasive blasting structure and minimally invasive blasting excavation method for maintaining stability of tunnel steps |
| CN110608642B (en) * | 2019-09-20 | 2022-04-19 | 中铁二局第二工程有限公司 | Minimally invasive blasting excavation method for maintaining stability of tunnel step |
| CN111521081A (en) * | 2020-05-26 | 2020-08-11 | 中建铁路投资建设集团有限公司 | Construction method for reducing explosion-control over-underproduction blasthole of inclined flat-curve tunnel |
| CN111521081B (en) * | 2020-05-26 | 2022-07-12 | 中建铁路投资建设集团有限公司 | Construction method for reducing explosion-control over-underproduction blasthole of inclined flat-curve tunnel |
| CN111912307A (en) * | 2020-07-23 | 2020-11-10 | 中交上海航道局有限公司 | Blasting excavation method of V-level surrounding rock large-section granite tunnel |
| CN111912307B (en) * | 2020-07-23 | 2022-09-09 | 中交上海航道局有限公司 | Blasting excavation method for V-level surrounding rock large-section granite tunnel |
| CN112781459A (en) * | 2021-01-26 | 2021-05-11 | 中铁十八局集团有限公司 | Small-section water conservancy tuff tunnel overbreak control method |
| CN115854809A (en) * | 2022-12-08 | 2023-03-28 | 中铁十八局集团有限公司 | Blasting cartridge and blasting excavation method for tunnel of expansive weak surrounding rock |
| DE102023108911B3 (en) | 2022-12-08 | 2024-06-13 | China Railway 18 Bureau Group Co., Ltd. | PRECISE BLASTING CARTRIDGE AND CORRESPONDING EXCAVATION METHODS FOR RAILWAY TUNNELS IN EXPANSIVE SOFT ROCK |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106091848B (en) | 2018-03-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106091848B (en) | It is a kind of to realize overlength, the method for high inclination-angle tunnel anchorage top bar explosion | |
| CN105333778B (en) | Medium-deep hole large-section composite cut blasting structure and method | |
| CN108007285B (en) | A kind of efficient Cut Blasting method of stone head deep hole sublevel segmentation | |
| CN102808622B (en) | Method for recovering ore pillar by medium-length hole and deep hole combined blasting technology | |
| CN109724484A (en) | A kind of the undercut blast hole arragement construction and well completion method of blind courtyard simultaneous shaft sin king | |
| CN108132006B (en) | Anti-clogging quick well formation undercut blast hole arragement construction and its blasting method | |
| CN103123247A (en) | Damping blasting method for steep dip small crossing angle layered surrounding rock small-distance tunnel excavation | |
| CN104634199B (en) | Method for realizing smooth blasting of tunnel peripheral eyes by using detonating cord and detonating tube detonator | |
| CN101441055A (en) | Presplit blasting method | |
| CN105606000B (en) | Partition control blasting method for tunnel rock drilling project | |
| CN104154830A (en) | Medium-length hole blasting method for underground mining | |
| CN103983147A (en) | Permafrost region road tunnel peripheral hole blasting construction method | |
| CN108489350A (en) | Smooth blasting construction method for rapid tunneling of upper step of grade-III surrounding rock tunnel | |
| CN110260735A (en) | A kind of diamond shape major diameter emptying aperture burn cut structure and lane construction technique | |
| CN109827480A (en) | A kind of novel pencil hole kerf blasting high-stage Cheng Jingfa | |
| CN102620612B (en) | Underground mine medium-length hole blasting method | |
| CN106545344B (en) | A kind of Karst area tunnel wall-hanging country rock face blast excavation method | |
| CN109029176A (en) | Sectional type cutting method | |
| CN210570252U (en) | Multi-directional energy-gathering blasting device for one-step blasting molding and slag throwing of hard rock | |
| CN104790950B (en) | Optimized mining middle-deep blasthole millisecond blasting slot cutting method | |
| CN118327584A (en) | Natural caving mining method in combination stage of deep hole pre-fracturing and hydraulic fracturing of steep thin ore body | |
| CN106895752A (en) | A kind of stratiform phosphorite ore body tunnel deep hole sinking and blasting method | |
| CN109372509A (en) | Arrangement method for double-hollow-hole rhombic cut holes in access filling mining | |
| CN110030889B (en) | Method for forming well by deep hole partition triangular net cut through one-time blasting | |
| CN210603016U (en) | Explosion-proof and delay explosion-transmitting device for explosive filling in segmented and spaced closed space |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |