CN108132005B - A kind of method of short-delay blasting in medium-length hole upward hole - Google Patents
A kind of method of short-delay blasting in medium-length hole upward hole Download PDFInfo
- Publication number
- CN108132005B CN108132005B CN201711312207.2A CN201711312207A CN108132005B CN 108132005 B CN108132005 B CN 108132005B CN 201711312207 A CN201711312207 A CN 201711312207A CN 108132005 B CN108132005 B CN 108132005B
- Authority
- CN
- China
- Prior art keywords
- hole
- medium
- length
- detonator
- blasthole
- 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.)
- Active
Links
- 238000005422 blasting Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000002360 explosive Substances 0.000 claims abstract description 33
- 230000037452 priming Effects 0.000 claims abstract description 30
- 238000004880 explosion Methods 0.000 claims abstract description 13
- 239000000843 powder Substances 0.000 claims description 39
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 15
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 15
- 241001330002 Bambuseae Species 0.000 claims description 15
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 15
- 239000011425 bamboo Substances 0.000 claims description 15
- 239000000839 emulsion Substances 0.000 claims description 12
- 238000005474 detonation Methods 0.000 claims description 7
- 238000005553 drilling Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 7
- 239000002184 metal Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 241000668842 Lepidosaphes gloverii Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 235000020004 porter Nutrition 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
-
- 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
-
- 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
- F42D1/22—Methods for holding or positioning for blasting cartridges or tamping cartridges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention belongs to metal mine technical fields, and in particular to a kind of method of short-delay blasting in medium-length hole upward hole；By arranging multistage priming bomb and bulk explosive into blasthole, and pass through the method for the control progress multistage explosion of blasthole escapement 4, it solves mine down-hole and carries out the technical problem for realizing the explosion of up-hole In-hole short delay in medium-length hole blasting operation, the short-delay blasting into charging hole on medium-length hole may be implemented by the method, in medium-length hole blasting simultaneous shaft sin king, both loading rate is improved, in turn ensures demolition effect, it is ensured that the success of explosion Cheng Jing.
Description
Technical field
The invention belongs to metal mine technical fields, and in particular to a kind of method of short-delay blasting in medium-length hole upward hole.
Background technique
Currently, in metal mine field of mining, Deep Hole Blasting is mainly used in stope and returns using more and more extensive
In adopting, but more and more mines use medium-length hole blasting simultaneous shaft sin king technology in the driving of cutting well, for upward hole
Explosion in be difficult to realize In-hole short delay explosion, continuous charging is generally carried out into blasthole using explosive loader, or powder stick is fixed
Sent on to bamboo pole in blasthole to realize spaced loading in hole.But the effect is unsatisfactory in practical explosion, and continuous charging can make
Explosive payload is excessive, not only causes blasting cost excessively high but also will affect demolition effect, destroys periphery blasthole, backbreaks and owes to dig phenomenon
Seriously；The enterprising row interval powder charge of bamboo pole is fixed on using powder stick, can not achieve blocking between two sections of medicines, seriously affects explosion effect
Fruit, and powder charge process is complicated for operation, large labor intensity, and production efficiency is low.
Summary of the invention
In order to overcome the above problem, the present invention provides a kind of method of short-delay blasting in medium-length hole upward hole, to solve mine
Mountain underground carries out the technical problem that the explosion of up-hole In-hole short delay is realized in medium-length hole blasting operation, can be real by the method
The short-delay blasting into charging hole both improves loading rate in medium-length hole blasting simultaneous shaft sin king on existing medium-length hole, in turn ensures
Demolition effect, it is ensured that the success of explosion Cheng Jing.
In order to achieve the above object, technical scheme is as follows:
Step 1: Drilling up-hole, i.e. medium-length hole 1 will guarantee that blasthole is vertical in boring procedure；
Step 2: production priming bomb 2, and given priming bomb 2 to 1 hole bottom of medium-length hole using powder charge pipe 7, and observe powder charge
The depth of the length mark C record medium-length hole 1 of pipe 7, wherein priming bomb 2 includes detonation shell case 21, detonator 22 and emulsion 23,
Emulsion 23 uses web-like emulsion, and priming bomb 2 is filled up, and detonator 22 is reversely inserted into emulsion 23, detonator 22
Upper included detonator wire 6；
Step 3: using powder charge pipe 7 to the built-in bulk explosive 3 of medium-length hole 1, and according to blast hole depth and In-hole short delay number of segment
It determines loaded length, until stopping powder charge when loaded length, and extracts powder charge pipe 7, that is, complete the arrangement of upper section explosive；
Step 4: blasthole escapement 4 being sent to 3 lower section of bulk explosive in medium-length hole 1 and is contacted with bulk explosive 3,
Middle blasthole escapement 4 is made by thick bamboo tube, and the diameter of thick bamboo tube is less than blasthole internal diameter, and lower end breaks into bamboo clappers strip and formed admittedly
Fixed end 42 along thick bamboo tube axial direction Drilling detonator wire perforation 41, and its edge is polished smooth, and fixing end 42 is stuck in medium-length hole 1
Inside prevent blasthole escapement 4 from falling off, the detonator wire 6 on hole bottom priming bomb 2 passes through blasthole by detonator wire perforation 41
Escapement 4；
Step 5: the priming bomb 2 of next section of production, structure is identical as the priming bomb 2 in step 2, uses powder charge pipe 7
The priming bomb 2 is sent to the lower section of blasthole escapement 4, the remainder into medium-length hole 1 of powder charge pipe 7 is reused and dispenses bulk explosive
3, stop powder charge when bulk explosive 3 is filled to away from 1 0.3~0.5m of aperture of medium-length hole, the detonator wire 6 on the priming bomb 2 extends
To the hole of medium-length hole 1, i.e., two sections of bulk explosives 3 are spaced apart by blasthole escapement 4；
Step 6: blocking blasthole using stemming 5, at the plug to 1 aperture of medium-length hole of stemming 5, and is smash with tamper
Real, stemming length guarantees multiple-row blasting quality not less than 0.3m, and detonator wire 6 is kept to throw away outside the hole of indwelling medium-length hole 1；
Step 7: in the same big gun downhole explosion, the detonator 22 of upper section and the detonator 22 of lower section do not detonate simultaneously, lower section
Detonator 22 first detonates, and the detonator 22 of re-detonating upper section after 50ms is spaced, if the depth of medium-length hole 1 is not able to satisfy two sections of bulk explosives
When 3 interval detonations require, need to be arranged three sections or four sections of bulk explosives 3 according to blast hole depth and the determination of In-hole short delay number of segment,
And it successively detonates from bottom to up, and be respectively provided with a blasthole escapement 4 between every two sections of bulk explosives 3.
The powder charge pipe 7 uses diameter to make for the hose of 32mm, makes long scale every 1m using reflective strip thereon
Know C, and marks its corresponding length.
The detonator 22 uses msdelayed light emission Nonel detonator.
Compared with prior art, advantages of the present invention is as follows:
Construction safety of the present invention is reliable, and method is simple and easy, adjusts strong flexibility, overcomes Xiang Lianxu on traditional medium-length hole
The problems such as powder charge and spaced loading formal operations are complicated, working efficiency is low, demolition effect is poor, realize on medium-length hole to charging hole
Interior short-delay blasting, ensure that demolition effect, solves the problems, such as that medium-length hole blasting simultaneous shaft sin king height is restricted, is medium-length hole
The popularization and application of explosion simultaneous shaft sin king technology provide technical guarantee.
Detailed description of the invention
Fig. 1 is implementation process schematic diagram of the present invention.
Fig. 2 is the structural schematic diagram of blasthole escapement of the present invention.
Fig. 3 is priming bomb structural schematic diagram of the present invention.
Fig. 4 is powder charge pipe structural schematic diagram of the present invention.
Wherein: 1 medium-length hole；2 priming bombs；21 detonation shell cases；22 detonators；23 emulsions；3 bulk explosives；4 blasthole intervals
Device；The perforation of 41 detonator wires；42 fixing ends；5 stemmings；6 detonator wires；7 powder charge pipes.
Specific embodiment
The following further describes the present invention with reference to the drawings.
A kind of method of short-delay blasting in medium-length hole upward hole, the specific steps are as follows:
Step 1: as shown in Figure 1, Drilling up-hole, i.e. medium-length hole 1, to guarantee that blasthole is vertical in boring procedure；
Step 2: as shown in figures 1 and 3, priming bomb 2 is made, and send priming bomb 2 to 1 hole of medium-length hole using powder charge pipe 7
Bottom, and the depth of the length mark C record medium-length hole 1 of powder charge pipe 7 is observed, wherein priming bomb 2 includes detonation shell case 21, detonator
22 and emulsion 23, emulsion 23 uses web-like emulsion, and priming bomb 2 is filled up, the reversely insertion emulsification of detonator 22
In explosive 23, detonator wire 6 is carried on detonator 22；
Step 3: using powder charge pipe 7 to the built-in bulk explosive 3 of medium-length hole 1, and according to blast hole depth and In-hole short delay number of segment
It determines loaded length, until stopping powder charge when loaded length, and extracts powder charge pipe 7, that is, complete the arrangement of upper section explosive；
Step 4: blasthole escapement 4 is sent to 3 lower section of bulk explosive in medium-length hole 1 and is contacted with bulk explosive 3, such as
Shown in Fig. 2, wherein blasthole escapement 4 is made by thick bamboo tube, and the diameter of thick bamboo tube is less than 5~10mm of blasthole internal diameter, bamboo
Tube length degree is 0.5m, and lower end breaks into bamboo clappers strip and forms fixing end 42, the detonator for being 10mm along thick bamboo tube axial direction Drilling diameter
Payment to a porter perforation 41, and its edge is polished smooth, fixing end 42, which is stuck in medium-length hole 1, prevents blasthole escapement 4 from falling off, bottom hole
The detonator wire 6 located on priming bomb 2 passes through blasthole escapement 4 by detonator wire perforation 41；
Step 5: as shown in figures 1 and 3, next section of priming bomb 2, structure and 2 phase of priming bomb in step 2 are made
Together, the priming bomb 2 is sent to the lower section of blasthole escapement 4 using powder charge pipe 7, it is remaining into medium-length hole 1 reuses powder charge pipe 7
Part dress bulk explosive 3, stops powder charge when bulk explosive 3 is filled to away from 1 0.3~0.5m of aperture of medium-length hole, on the priming bomb 2
Detonator wire 6 extends to outside the hole of medium-length hole 1, i.e., two sections of bulk explosives 3 are spaced apart by blasthole escapement 4；
Step 6: as shown in Figure 1, blasthole is blocked using stemming 5, at the plug to 1 aperture of medium-length hole of stemming 5,
And consolidated with tamper, stemming length guarantees multiple-row blasting quality not less than 0.3m, and detonator wire 6 is kept to throw away indwelling medium-length hole 1
Hole outside.
As shown in figure 4, the powder charge pipe 7 uses diameter to make for the hose of 32mm, thereon using reflective strip every 1m
Length mark C to be made, and marks its corresponding length, when powder charge 7 powder charge of pipe, needs to fill in powder charge pipe 7 to medium-length hole 1, and with
Powder charge pipe 7 is at the uniform velocity extracted in the progress of powder charge out.
The detonator 22 uses msdelayed light emission Nonel detonator.
In the same big gun downhole explosion, the detonator 22 of upper section and the detonator 22 of lower section do not detonate simultaneously, the detonator 22 of lower section
It first detonates, is spaced the detonator 22 of re-detonating upper section after 50ms, if the depth of medium-length hole 1 is not able to satisfy two sections of bulk explosives 3 and is spaced
When detonation requires, need to be arranged three sections or four sections of bulk explosives 3 according to blast hole depth and the determination of In-hole short delay number of segment, and under
It is supreme successively to detonate, and a blasthole escapement 4 is respectively provided between every two sections of bulk explosives 3.
Claims (3)
1. a kind of method of short-delay blasting in medium-length hole upward hole, it is characterised in that include the following steps:
Step 1: Drilling up-hole, i.e. medium-length hole (1) will guarantee that blasthole is vertical in boring procedure；
Step 2: production priming bomb (2), and given priming bomb (2) to medium-length hole (1) hole bottom using powder charge pipe (7), and observe
The depth of length mark C record medium-length hole (1) of powder charge pipe (7), wherein priming bomb (2) includes detonation shell case (21), detonator
(22) priming bomb (2) is filled up using web-like emulsion with emulsion (23), emulsion (23), detonator (22) is anti-
Into insertion emulsion (23), detonator wire (6) are carried on detonator (22)；
Step 3: using powder charge pipe (7) to medium-length hole (1) built-in bulk explosive (3), and according to blast hole depth and In-hole short delay section
Number determines loaded length, until stopping powder charge when loaded length, and extracts powder charge pipe (7), that is, completes the arrangement of upper section explosive；
Step 4: blasthole escapement (4) is sent to medium-length hole (1) interior bulk explosive (3) lower section and is connect with bulk explosive (3)
Touching, wherein blasthole escapement (4) is made by thick bamboo tube, and the diameter of thick bamboo tube is less than blasthole internal diameter, and lower end breaks into bamboo lath
Shape forms fixing end (42), perforates (41) along thick bamboo tube axial direction Drilling detonator wire, and its edge is polished smooth, fixing end
(42) being stuck in medium-length hole (1) prevents blasthole escapement (4) from falling off, and the detonator wire (6) on hole bottom priming bomb (2) passes through
Detonator wire perforates (41) across blasthole escapement (4)；
Step 5: the priming bomb (2) of next section of production, structure is identical as priming bomb (2) in step 2, uses powder charge pipe
(7) priming bomb (2) is sent to the lower section of blasthole escapement (4), reuses powder charge pipe (7) to medium-length hole (1) interior remainder
It dispenses bulk explosive (3), stops powder charge when bulk explosive (3) is filled to away from medium-length hole (1) 0.3~0.5m of aperture, the priming bomb
(2) detonator wire (6) on extends to outside the hole of medium-length hole (1), i.e. blasthole escapement (4) is by two sections of bulk explosives (3)
It is spaced apart；
Step 6: blocking blasthole using stemming (5), at stemming (5) plug to medium-length hole (1) aperture, and uses tamper
Tamping, stemming length guarantee multiple-row blasting quality not less than 0.3m, and detonator wire (6) is kept to throw away the hole of indwelling medium-length hole (1)
It is external；
Step 7: in the same big gun downhole explosion, the detonator (22) of upper section and the detonator (22) of lower section do not detonate simultaneously, lower section
Detonator (22) first detonates, and is spaced the detonator (22) of re-detonating upper section after 50ms, dissipates if the depth of medium-length hole (1) is not able to satisfy two sections
When the detonation of blasting charge (3) interval requires, determine that needing to be arranged three sections or four sections dissipates according to blast hole depth and In-hole short delay number of segment
Blasting charge (3), and successively detonate from bottom to up, and be respectively provided with a blasthole escapement between every two sections of bulk explosives (3)
(4)。
2. the method for short-delay blasting in a kind of medium-length hole upward hole as described in claim 1, it is characterised in that the powder charge
Pipe (7) uses diameter to make for the hose of 32mm, makes length mark C every 1m using reflective strip thereon, and it is corresponding to mark it
Length.
3. the method for short-delay blasting in a kind of medium-length hole upward hole as described in claim 1, it is characterised in that the detonator
(22) msdelayed light emission Nonel detonator is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711312207.2A CN108132005B (en) | 2017-12-07 | 2017-12-07 | A kind of method of short-delay blasting in medium-length hole upward hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711312207.2A CN108132005B (en) | 2017-12-07 | 2017-12-07 | A kind of method of short-delay blasting in medium-length hole upward hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108132005A CN108132005A (en) | 2018-06-08 |
| CN108132005B true CN108132005B (en) | 2019-09-17 |
Family
ID=62390098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711312207.2A Active CN108132005B (en) | 2017-12-07 | 2017-12-07 | A kind of method of short-delay blasting in medium-length hole upward hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108132005B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109238060A (en) * | 2018-10-31 | 2019-01-18 | 唐山冀东启新水泥有限责任公司 | Airspace structure and method for mine blasting |
| CN111412798A (en) * | 2020-03-19 | 2020-07-14 | 安徽金日晟矿业有限责任公司 | Mining construction process for realizing one-step blasting forming of reversing table body of chute |
| CN114033373B (en) * | 2021-10-22 | 2024-02-06 | 武汉工程大学 | Reverse well drilling machine-medium deep hole differential blasting collaborative primary grooving method |
| CN114199091A (en) * | 2021-12-13 | 2022-03-18 | 攀钢集团工程技术有限公司 | Detonation cartridge device for upward medium-length hole and charge construction method |
| CN114526649A (en) * | 2021-12-16 | 2022-05-24 | 江睿 | Preparation method of simple ammonium nitrate fuel oil explosive for drilling |
| CN114526652B (en) * | 2022-03-11 | 2023-03-14 | 长沙矿山研究院有限责任公司 | Upward medium-length hole non-coupling charging structure and application method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389015A (en) * | 2013-08-09 | 2013-11-13 | 贵州新联爆破工程集团有限公司 | Subsection millisecond differential blasting method in blasthole |
| CN103954182A (en) * | 2014-05-20 | 2014-07-30 | 武汉工程大学 | Upward blast hole stemming device for mine, and blast hole charging method |
| RU2563893C1 (en) * | 2014-09-10 | 2015-09-27 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Национальный исследовательский технологический университет "МИСиС" | Method of detonation in open-cast minings of rock masses with different strength values |
| CN106767213A (en) * | 2017-01-18 | 2017-05-31 | 长沙有色冶金设计研究院有限公司 | A kind of Roof Control blasting method of soft broken top board ore body back production |
-
2017
- 2017-12-07 CN CN201711312207.2A patent/CN108132005B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389015A (en) * | 2013-08-09 | 2013-11-13 | 贵州新联爆破工程集团有限公司 | Subsection millisecond differential blasting method in blasthole |
| CN103954182A (en) * | 2014-05-20 | 2014-07-30 | 武汉工程大学 | Upward blast hole stemming device for mine, and blast hole charging method |
| RU2563893C1 (en) * | 2014-09-10 | 2015-09-27 | Федеральное государственное автономное образовательное учреждение высшего профессионального образования "Национальный исследовательский технологический университет "МИСиС" | Method of detonation in open-cast minings of rock masses with different strength values |
| CN106767213A (en) * | 2017-01-18 | 2017-05-31 | 长沙有色冶金设计研究院有限公司 | A kind of Roof Control blasting method of soft broken top board ore body back production |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108132005A (en) | 2018-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108132005B (en) | A kind of method of short-delay blasting in medium-length hole upward hole | |
| CN102808622B (en) | Method for recovering ore pillar by medium-length hole and deep hole combined blasting technology | |
| CN103940309B (en) | A kind of method of underground blasting Cheng Jing | |
| CN109029168A (en) | A kind of blast processing method on the outstanding top in underground | |
| CN104482816B (en) | A kind of vertical periphery segment algorithm gradient presplit blasting method and device | |
| CN102967191A (en) | Blasting method for treatment of gob | |
| CN108132006A (en) | Anti-clogging quick well formation undercut blast hole arrangement and its blasting method | |
| CN109870084B (en) | VCR mining method hole-sweeping-free blasting charge structure and construction method thereof | |
| CN112696999A (en) | Charging device and charging method for deep hole blasting | |
| CN215447614U (en) | Top-cutting entry-retaining presplitting blasting back-dragging energy-gathered charging device | |
| CN109974545A (en) | A kind of medium-length hole blasting outstanding top processing method in sublevel caving method | |
| CN108398067B (en) | On a kind of medium-length hole under punching to the In-hole short delay blasting method of powder charge | |
| CN108362181A (en) | A kind of driving recovery method of extra narrow vein ore body | |
| CN108590651B (en) | A kind of method of more drilling chamber recycling ore pillars | |
| AU784685B2 (en) | A method of blasting | |
| CN102927863B (en) | A kind of new method of total rock tunnel blasting construction | |
| AU2016235369B2 (en) | System and method for underground blasting | |
| CN210570270U (en) | Bonnet fryer with rubble is thrown function | |
| CN105240044A (en) | Method for preventing and treating coal and gas outburst by explosion | |
| CN111457799B (en) | Delay blasting system for preventing detonator from dragging and construction method thereof | |
| CN219328376U (en) | Deep hole directional blasting charging structure | |
| CN110145981A (en) | A kind of explosion well completion method for shallow vertical shaft | |
| CN220454425U (en) | Deep hole presplitting blasting device | |
| US20230399926A1 (en) | Single Energy Source Projectile Perforating System | |
| CN108661638B (en) | A kind of method of ring holes recycling ore pillar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 130012 nanhu road, Jilin, Changchun, No. 6760 Patentee after: CHANGCHUN GOLD RESEARCH INSTITUTE Co.,Ltd. Address before: 130012 nanhu road, Jilin, Changchun, No. 6760 Patentee before: CHANGCHUN GOLD Research Institute |