CN113048852A - Efficient blasting method for dilution control of low-grade metal ore - Google Patents
Efficient blasting method for dilution control of low-grade metal ore Download PDFInfo
- Publication number
- CN113048852A CN113048852A CN202110293659.0A CN202110293659A CN113048852A CN 113048852 A CN113048852 A CN 113048852A CN 202110293659 A CN202110293659 A CN 202110293659A CN 113048852 A CN113048852 A CN 113048852A
- Authority
- CN
- China
- Prior art keywords
- blasting
- main
- differentiated
- low
- grade metal
- 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.)
- Pending
Links
- 238000005422 blasting Methods 0.000 title claims abstract description 124
- 238000010790 dilution Methods 0.000 title claims abstract description 26
- 239000012895 dilution Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000002184 metal Substances 0.000 title claims abstract description 23
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 23
- 230000008878 coupling Effects 0.000 claims abstract description 4
- 238000010168 coupling process Methods 0.000 claims abstract description 4
- 238000005859 coupling reaction Methods 0.000 claims abstract description 4
- 239000002360 explosive Substances 0.000 claims description 20
- 239000011435 rock Substances 0.000 claims description 13
- 239000000945 filler Substances 0.000 claims description 11
- 239000002893 slag Substances 0.000 claims description 9
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 230000003111 delayed effect Effects 0.000 claims description 4
- 239000011148 porous material Substances 0.000 claims 1
- 238000005065 mining Methods 0.000 abstract description 13
- 238000005553 drilling Methods 0.000 description 20
- 230000000694 effects Effects 0.000 description 7
- 238000004880 explosion Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000005474 detonation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
- 239000010878 waste rock Substances 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
- 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 application provides a high-efficiency blasting method for dilution control of low-grade metal ores, and belongs to the technical field of mining and blasting. According to the efficient blasting method for dilution control of the low-grade metal ore, the differentiated blasting holes are formed between the ore body and the non-ore body; and by setting a reasonable pitch; setting different blasting coupling coefficients; through the arrangement, the purpose of separating ore bodies and non-ore bodies through blasting can be well achieved, the loss and dilution of the ore bodies are further controlled, and the purpose of improving economic benefits is achieved.
Description
Technical Field
The application relates to the technical field of mining and blasting, in particular to a high-efficiency blasting method for dilution control of low-grade metal ores.
Background
In mining of mines, due to the mining technology and the ore body, the mine cannot be removed, and ore loss is caused.
Depletion means that the mined ore has a lower content of useful minerals than in the ore body, due to the mixing of the ore with the waste rock during mining.
In China, 800 more than ten thousand tons (containing 400 more than ten thousand tons of iron and nearly ten thousand tons of copper) are produced by only copper smelting slag every year, and the slag is composite ore smelting slag containing valuable metal compounds and has the characteristics of large quantity, fine granularity, various types, complex components and the like.
When the mine is subjected to initial mining and dressing, non-ore body parts such as ore bodies and rocks are separated, so that the ore bodies can be separated through initial blasting; however, no specific method exists how to effectively blast and control wide body depletion.
Content of application
The exploitation of low-grade metal ores is difficult originally, and the exploitation cost is increased; if rock and other components are mixed in during mining, ore depletion is caused; therefore, the aim of dilution control of the low-grade metal ore can be achieved through early efficient blasting.
The application discloses a high-efficiency blasting method for dilution control of low-grade metal ores, which comprises the following steps:
setting differentiated blast holes on the boundary of the ore rocks;
arranging a plurality of rows of main blast holes on the ore body;
each row of main blast holes are arranged in a staggered manner;
setting the hole pitch of the main blasting holes to be 3-7 m; the row spacing of the main blast holes is 4-8 m;
placing explosive in a non-coupling and spaced charging mode;
blasting by adopting a delay differential blasting mode.
In mining, the ore vein may be concentrated in only partial area, so that the ore body and the non-ore body such as rock need to be separated, therefore, according to the result of exploration, the boundary between the ore body and the non-ore body is planned, the differentiated blast hole is arranged according to the boundary, and blasting is carried out through the differentiated blast hole, so that the ore body and the non-ore body can be well separated, and the dilution and the loss of ore are reduced.
The reasonable hole distance is set, and the extrusion blasting effect of the explosive stress wave can be reasonably utilized. The explosive gas in the explosive chamber formed by explosion expands to the periphery to form an explosive cavity. The medium surrounding the cavity is compacted or broken under the action of strong high pressure, and then cracks are formed. The degree of compaction or fragmentation of the media decreases with distance.
The stress wave is gradually attenuated in the propagation process, and the pressure of the explosive gas in the explosive cavity is gradually reduced along with the increase of the explosive cavity. When the stress wave is transmitted to a certain distance, the stress wave becomes a common plastic wave, namely, the medium only generates plastic deformation and generally does not generate fracture damage.
The stress wave decays further into an elastic wave and the medium in the corresponding region deforms only elastically. From the center of the explosion to the area, the area is called the blasting action range, and the area is the earthquake action range caused by the explosion outwards.
In some of the foregoing embodiments, the pitch of the differentiated blastholes is 0.55-0.75 times the pitch of the primary blastholes.
In an embodiment, the hole pitch of the differentiated blast holes is reduced, that is, the dense differentiated blast holes are arranged, so that a blasting interface is formed along the differentiated blast holes, the ore body and the non-ore body are effectively separated, and the ore dilution and loss are reduced.
In some embodiments, the diameter of the main blast hole is 100-150 mm; differentiating the blast holes by 75-90 mm.
In the embodiment, the diameter of the main blast hole is relatively thick, so that the filling of more explosives is facilitated; the diameter of the differentiated blast hole is small, so that large blast can be avoided, and the mixing of non-ore body components is reduced; the controlled blasting is performed along the boundary, i.e. the effect of separating ore bodies from non-ore bodies is caused.
In some of the foregoing embodiments, the differentiated blastholes are spaced from the adjacent primary blasthole by 0.6-0.8 times the blast hole pitch.
In the embodiment, the explosive filling is relatively reduced due to the relatively smaller aperture of the differentiated blasting hole, so that the distance between the differentiated blasting hole and the main blasting hole is set to be closer, and the blasting effects of the main blasting hole and the differentiated blasting hole are superposed; the blasting and crushing of ore bodies are facilitated, and the later-stage mining and selection is facilitated; and is also beneficial to the separation of ore bodies and non-ore bodies.
In the embodiment, the drilling speed needs to be gradually reduced due to the increase of the depth of the rotary hole; and the drilling speed decreases faster as the drilling speed increases. When the blast hole speed exceeds 3m, due to the increase of the weight of the drill rod, the impact force which needs to overcome the elastic deformation of the drill rod is increased, the powder discharging difficulty is increased, and then the frictional resistance between the drill rod and the blast hole wall is increased, and the energy consumption is increased, so that when the depth of the blast hole is 5-20m, special drilling equipment needs to be used.
In some of the foregoing embodiments, the decoupling coefficient of the decoupling-spacing charge of the primary blasthole is from 1.3 to 1.6; the uncoupling coefficient of the differentiated blast hole is 1.1-1.3.
The uncoupled charge is a charge form with a diameter of a blast hole larger than that of the cartridge, and is a coupled charge correspondingly. When the uncoupled charge explodes, the detonation wave is transmitted to the rock on the hole wall through the air medium, and the air gap is just like an air cushion. The energy of the gas products in the initial stage of detonation can be (partially) stored, and the initial pressure peak acting on the blast hole is weakened. Then the compressed air cushion releases a large amount of stored energy to do work, and the acting time of detonation gas products is prolonged. The blasting effect is improved. Uncoupled charge configurations are widely used for presplitting and smooth blasting.
In some of the foregoing embodiments, the spacer charges that are not coupled-spacer charges are packed in a length of explosive length to spacer length of 2-3: 1.
In some of the foregoing embodiments, the spacer filler is stemming or rock slag.
The essence of interval charging blasting is that the contact relation between the explosive column and the wall of the blast hole is changed through the interval medium so as to reduce the initial pressure of stress waves and detonation gas products acting on the wall of the hole, prolong the action time of the pressure, and ensure that no crushing area or obviously reduced crushing area is generated around the blast hole, thereby achieving the purpose of ensuring blasting breakage by depending on the improvement of the effective utilization rate of explosive energy under the condition of reducing the charging amount of the blast hole.
In the embodiment, the spaced charging is carried out on the premise of ensuring the ore rock to be fully crushed, and the hole bottom air spaced charging is adopted, so that the peak mass point vibration speed of blasting vibration can be effectively reduced, the bulk rate is reduced, and the root bottom is reduced. The interaction of one-dimensional irregular shock waves in the interval charging blast hole and the reflection process of the one-dimensional irregular shock waves at the plug and the bottom of the blast hole are analyzed, and the change process of the pressure of each point in the hole along with the time is analyzed.
In some embodiments of the present application, the differentiated blastholes are delayed blasts for 45-60ms than the primary blastholes.
In some of the foregoing embodiments, the inter-row delay interval of the primary blastholes is 3-15 ms/m.
In the embodiment, the blasting time of the differentiated blasting is delayed compared with that of the main blasting hole, the main blasting hole is blasted to form an explosion wave which is conducted to the differentiated blasting hole, the differentiated blasting hole forms the explosion, and the blasting effects of the main blasting hole and the differentiated blasting hole are superposed, so that the differentiated blasting effect is better, the explosive loading of the differentiated blasting can be reduced, and the same effect is achieved.
Compared with the prior art, the beneficial effect of this application includes: according to the efficient blasting method for dilution control of the low-grade metal ore, the differentiated blasting holes are formed between the ore body and the non-ore body; and by setting a reasonable pitch; setting different blasting coupling coefficients; through the arrangement, the purpose of separating ore bodies and non-ore bodies through blasting can be well achieved, the loss and dilution of the ore bodies are further controlled, and the purpose of improving economic benefits is achieved.
Detailed Description
Embodiments of the present application will be described in detail below with reference to examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present application and should not be construed as limiting the scope of the present application. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The features and properties of the present application are described in further detail below with reference to examples.
Example 1
The high-efficiency blasting method for dilution control of low-grade metal ore provided by the embodiment comprises the following steps:
1.1 dividing the boundary between an ore body and a non-ore body according to the prior exploration; drilling a plurality of rows of main blasting holes in an ore body area, wherein each row of main blasting holes are uniformly arranged, and the aperture of each main blasting hole is 150 mm; the pitch of the main blasting holes is 7m, and the pitch of the main blasting holes among rows is 8 m;
1.2 drilling a differentiated blast hole along the boundary of an ore body and a non-ore body, wherein the aperture of the differentiated blast hole is 90 mm; the pitch of the differentiated blast holes is 0.55 times of that of the main blast holes, namely 3.85 m;
1.3, drilling a main blast hole and a differentiated blast hole at the speed of 0.4m/h, wherein the drilling speed is reduced by 10% when the hole depth advances by 1 m;
1.4 the distance between the differentiated blasting holes and the main blasting holes of the adjacent rows is 0.8 times of the row distance of the main blasting holes, namely 6.4 m;
1.5, adopting uncoupled charge for both the main blast hole and the differentiated blast hole, wherein the uncoupled coefficient of the main blast hole is 1.3, and the uncoupled coefficient of the differentiated blast hole is 1.1;
1.6 carrying out interval charge on the main blast hole and the differentiated blast hole by using stemming or rock slag as an interval filler, wherein the length of the explosive and the length of the interval filler are according to the length of 2: 1;
1.7 the filling length of the main blast hole and the differentiated blast hole is 15 times of the aperture;
1.8 the blasting time of the differentiated blasting holes is delayed for blasting for 45ms compared with the main blasting holes; and the delay blasting scheme with the delay interval time between the rows of the main blasting holes being 15 ms/m.
And mining after blasting is finished.
Example 2
The high-efficiency blasting method for dilution control of low-grade metal ore provided by the embodiment comprises the following steps:
1.1 dividing the boundary between an ore body and a non-ore body according to the prior exploration; drilling a plurality of rows of main blasting holes in an ore body area, wherein each row of main blasting holes are uniformly arranged, and the aperture of each main blasting hole is 100 mm; the pitch of the main blasting holes is 3m, and the row pitch of the main blasting holes among rows is 4 m;
1.2 drilling a differentiated blast hole along the boundary of an ore body and a non-ore body, wherein the aperture of the differentiated blast hole is 75 mm; the pitch of the differentiated blast holes is 0.75 times of that of the main blast holes, namely 2.25 m;
1.3, drilling a main blast hole and a differentiated blast hole at the speed of 0.4m/h, wherein the drilling speed is reduced by 10% when the hole depth advances by 1 m;
1.4 the distance between the differentiated blasting holes and the main blasting holes of the adjacent rows is 0.6 times of the row distance of the main blasting holes, namely 2.4 m;
1.5, adopting uncoupled charge for both the main blast hole and the differentiated blast hole, wherein the uncoupled coefficient of the main blast hole is 1.6, and the uncoupled coefficient of the differentiated blast hole is 1.3;
1.6 carrying out interval charging on the main blast hole and the differentiated blast hole by using stemming or rock slag as an interval filler, wherein the length of the explosive and the length of the interval filler are according to the length of 3: 1;
1.7 the filling length of the main blast hole and the differentiated blast hole is 20 times of the aperture;
1.8 the differentiated blasting hole is blasted for 60ms in a time delay way compared with the blasting time of the main blasting hole; and the delay blasting scheme with the delay interval time between the rows of the main blasting holes being 3 ms/m.
And mining after blasting is finished.
Example 3
The high-efficiency blasting method for dilution control of low-grade metal ore provided by the embodiment comprises the following steps:
1.1 dividing the boundary between an ore body and a non-ore body according to the prior exploration; drilling a plurality of rows of main blasting holes in an ore body area, wherein each row of main blasting holes are uniformly arranged, and the aperture of each main blasting hole is 120 mm; the pitch of the main blasting holes is 5m, and the pitch of the main blasting holes among rows is 6 m;
1.2 drilling a differentiated blast hole along the boundary of an ore body and a non-ore body, wherein the aperture of the differentiated blast hole is 85 mm; the pitch of the differentiated blast holes is 0.70 times of that of the main blast holes, namely 3.5 m;
1.3, drilling a main blast hole and a differentiated blast hole at the speed of 0.4m/h, wherein the drilling speed is reduced by 10% when the hole depth advances by 1 m;
1.4 the distance between the differentiated blasting holes and the main blasting holes of the adjacent rows is 0.7 times of the row distance of the main blasting holes, namely 4.2 m;
1.5, adopting uncoupled charge for both the main blast hole and the differentiated blast hole, wherein the uncoupled coefficient of the main blast hole is 1.5, and the uncoupled coefficient of the differentiated blast hole is 1.2;
1.6 carrying out interval charge on the main blast hole and the differentiated blast hole by using stemming or rock slag as an interval filler, wherein the length of the explosive and the length of the interval filler are according to the length of 2: 1;
1.7 the filling length of the main blast hole and the differentiated blast hole is 17 times of the aperture;
1.8 the differential blast hole is blasted for 55ms in a time delay way compared with the blast time of the main blast hole; and the delay blasting scheme with the delay interval time between the rows of the main blasting holes being 8 ms/m.
And mining after blasting is finished.
Example 4
The high-efficiency blasting method for dilution control of low-grade metal ore provided by the embodiment comprises the following steps:
1.1 dividing the boundary between an ore body and a non-ore body according to the prior exploration; drilling a plurality of rows of main blasting holes in an ore body area, wherein each row of main blasting holes are uniformly arranged, and the aperture of each main blasting hole is 140 mm; the pitch of the main blasting holes is 6m, and the row pitch of the main blasting holes among rows is 5 m;
1.2 drilling a differentiated blast hole along the boundary of an ore body and a non-ore body, wherein the aperture of the differentiated blast hole is 80 mm; the pitch of the differentiated blast holes is 0.60 times of that of the main blast holes, namely 3.6 m;
1.3, drilling a main blast hole and a differentiated blast hole at the speed of 0.4m/h, wherein the drilling speed is reduced by 10% when the hole depth advances by 1 m;
1.4 the distance between the differentiated blasting holes and the main blasting holes of the adjacent rows is 0.6 times of the row distance of the main blasting holes, namely 3 m;
1.5, adopting uncoupled charge for both the main blast hole and the differentiated blast hole, wherein the uncoupled coefficient of the main blast hole is 1.4, and the uncoupled coefficient of the differentiated blast hole is 1.1;
1.6 carrying out interval charging on the main blast hole and the differentiated blast hole by using stemming or rock slag as an interval filler, wherein the length of the explosive and the length of the interval filler are according to the length of 3: 1;
1.7 the filling length of the main blast hole and the differentiated blast hole is 18 times of the aperture;
1.8, blasting time delay blasting of the differentiated blasting holes is 50ms longer than that of the main blasting holes; and the delay blasting scheme with the delay interval time between the rows of the main blasting holes being 12 ms/m.
And mining after blasting is finished.
The embodiments described above are some, but not all embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Claims (10)
1. The efficient blasting method for dilution control of the low-grade metal ore is characterized by comprising the following steps of:
setting differentiated blast holes on the boundary of the ore rocks;
arranging a plurality of rows of main blast holes on the ore body;
each row of the main blasting holes are arranged in a staggered manner;
setting the hole pitch of the main blasting holes to be 3-7 m; the row spacing of the main blasting holes is 4-8 m;
placing explosive in a non-coupling and spaced charging mode;
blasting by adopting a delay differential blasting mode.
2. The high-efficiency blasting method for dilution control of low-grade metal ore according to claim 1, wherein the pitch of the differentiated blastholes is 0.55 to 0.75 times the pitch of the main blastholes.
3. The efficient blasting method for dilution control of low-grade metal ore according to claim 2, wherein the diameter of the main blasting hole is 100-150 mm; the differentiated blast holes are 75-90 mm.
4. The high-efficiency blasting method for dilution control of low-grade metal ore according to claim 1, wherein the distance between the differentiated blastholes and the adjacent main blastholes is 0.6-0.8 times of the row pitch of the blastholes.
5. The high-efficiency blasting method for dilution control of low-grade metal ore according to claim 1, wherein the uncoupled-spaced charge in the main blasthole has a decoupling coefficient of 1.3-1.6; the uncoupling coefficient of the differentiated blast hole is 1.1-1.3.
6. The high-efficiency blasting method for dilution control of low-grade metal ore according to claim 1, wherein the spacer charges of the uncoupled-spacer charges are packed in a ratio of explosive length to spacer-filler length of 2-3: 1.
7. The high-efficiency blasting method for dilution control of low-grade metal ore according to claim 6, wherein the spacer filler is stemming or rock slag.
8. The high-efficiency blasting method for dilution control of low-grade metal ore according to claim 7, wherein the charge length is 15 to 20 times the pore diameter.
9. The high-efficiency blasting method for dilution control of low-grade metal ore according to claim 1, wherein the differentiated blastholes are subjected to delayed blasting for 45-60ms compared with the main blastholes.
10. The high-efficiency blasting method for dilution control of low-grade metal ore according to claim 8, wherein the row-to-row delay interval of the main blastholes is 3-15 ms/m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110293659.0A CN113048852A (en) | 2021-03-19 | 2021-03-19 | Efficient blasting method for dilution control of low-grade metal ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110293659.0A CN113048852A (en) | 2021-03-19 | 2021-03-19 | Efficient blasting method for dilution control of low-grade metal ore |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113048852A true CN113048852A (en) | 2021-06-29 |
Family
ID=76513510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110293659.0A Pending CN113048852A (en) | 2021-03-19 | 2021-03-19 | Efficient blasting method for dilution control of low-grade metal ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113048852A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2044998C1 (en) * | 1992-10-07 | 1995-09-27 | Восточный научно-исследовательский горнорудный институт | Method for rock blasting in open pit |
| CN102331212A (en) * | 2011-09-07 | 2012-01-25 | 薛世忠 | Loss and dilution controlled blasting method for open metal mine |
| CN106288994A (en) * | 2016-08-18 | 2017-01-04 | 福建省新华都工程有限责任公司 | A kind of differential charge constitution controlled blasting reduces the method for loss and dilution |
| CN109630120A (en) * | 2019-01-25 | 2019-04-16 | 中南大学 | A kind of mining methods for the rich or poor co-layer ore body of low-angle dip |
| CN110530219A (en) * | 2019-09-06 | 2019-12-03 | 中钢集团马鞍山矿山研究院有限公司 | A kind of control blasting method reducing loss and dilution |
| CN111236944A (en) * | 2020-02-12 | 2020-06-05 | 长沙有色冶金设计研究院有限公司 | Open-cast mining process suitable for multi-layer gentle-dip thin ore body |
-
2021
- 2021-03-19 CN CN202110293659.0A patent/CN113048852A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2044998C1 (en) * | 1992-10-07 | 1995-09-27 | Восточный научно-исследовательский горнорудный институт | Method for rock blasting in open pit |
| CN102331212A (en) * | 2011-09-07 | 2012-01-25 | 薛世忠 | Loss and dilution controlled blasting method for open metal mine |
| CN106288994A (en) * | 2016-08-18 | 2017-01-04 | 福建省新华都工程有限责任公司 | A kind of differential charge constitution controlled blasting reduces the method for loss and dilution |
| CN109630120A (en) * | 2019-01-25 | 2019-04-16 | 中南大学 | A kind of mining methods for the rich or poor co-layer ore body of low-angle dip |
| CN110530219A (en) * | 2019-09-06 | 2019-12-03 | 中钢集团马鞍山矿山研究院有限公司 | A kind of control blasting method reducing loss and dilution |
| CN111236944A (en) * | 2020-02-12 | 2020-06-05 | 长沙有色冶金设计研究院有限公司 | Open-cast mining process suitable for multi-layer gentle-dip thin ore body |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8826820B2 (en) | High energy blasting | |
| CN109029177B (en) | Blasting method for access type stoping | |
| US20160069655A1 (en) | High Energy Blasting | |
| CN113107490A (en) | Roof cutting and pressure relief method for high-ground-stress hard roof of coal mine | |
| CN110332865A (en) | Deep high stress stope upper centripetal deep hole combined blasting method | |
| CN107462117A (en) | A kind of slotting of hard rock rock gangway deep hole and blasting method | |
| CN107524444A (en) | A kind of controlled blasting method for improving resuing stoping and falling ore deposit efficiency | |
| CN108801091B (en) | Heterogeneous rock mass strip mine blasting method | |
| CN108050902B (en) | Tunnel blasting excavation method | |
| Sazid et al. | Effective explosive energy utilization for engineering blasting–initial results of an inventive stemming plug, SPARSH | |
| CN113188388A (en) | In-hole delay sectional detonating cut structure and method | |
| CN203083466U (en) | Low-boulder-yield waterpower supercharging blasting charging structure | |
| CN113048852A (en) | Efficient blasting method for dilution control of low-grade metal ore | |
| CN102787843A (en) | Dirt band-containing coal seam working surface mining process | |
| Zhang | Controlling vibrations caused by underground blasts in LKAB Malmberget mine | |
| CN110378032A (en) | A kind of mining explosion presplit blasting determination method for parameter | |
| CN115127415A (en) | Boundary grooving presplitting blasting method for underground cemented filling body | |
| CN109974547A (en) | A kind of mining methods of surface mine | |
| CN207797897U (en) | The soft or hard blast hole loading structure for being mingled with beded rock mass Long-hole Bench Blasting | |
| CN106767208B (en) | A kind of blasting method and structure of efficient demolition set | |
| CN113028923A (en) | Medium-length hole blasting method for porphyry open-pit copper mine | |
| Bakhshandeh Amnieh et al. | Controlling backbreak and improving technical and economic parameters in Mishdovan Iron Ore Mine | |
| Landman | How electronics can release the imagination | |
| Zhang et al. | A new method of cut-blasting for vertical shaft excavation and its experimental study | |
| CN113251881B (en) | Test method for setting blasting delay time |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210629 |
|
| RJ01 | Rejection of invention patent application after publication |