CN107131805A - A kind of mining methods for being used to improve underground Caving Method with Large Space ore drawing in stope grade - Google Patents

A kind of mining methods for being used to improve underground Caving Method with Large Space ore drawing in stope grade Download PDF

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Publication number
CN107131805A
CN107131805A CN201710370232.XA CN201710370232A CN107131805A CN 107131805 A CN107131805 A CN 107131805A CN 201710370232 A CN201710370232 A CN 201710370232A CN 107131805 A CN107131805 A CN 107131805A
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China
Prior art keywords
stope
ore
caving
space
blasthole
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CN201710370232.XA
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CN107131805B (en
Inventor
王建军
李德忠
蔡立丰
张国勇
王志远
牟业龙
高闻宇
刘亭
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Northwest Research Institute of Mining and Metallurgy
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Northwest Research Institute of Mining and Metallurgy
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42DBLASTING
    • F42D1/00Blasting methods or apparatus, e.g. loading or tamping
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42DBLASTING
    • F42D3/00Particular applications of blasting techniques
    • F42D3/04Particular applications of blasting techniques for rock blasting

Abstract

The invention discloses a kind of mining methods for being used to improve underground Caving Method with Large Space ore drawing in stope grade, belong to underground mining technology field.This method is by rationally setting reserved fore-set, open-stope method blasthole, Caving Method with Large Space blasthole and demolition set, and by efficiently control ore drawing mode realize first 100% ore drawing is carried out under the conditions of small barnyard, then the mining technique that 90% ore drawing is carried out under the conditions of covering layer is mixed with is broken through, Mine Stope average loss rate is set to drop to 5.8% from 23%, the average rate of dilution drops to 7.2% from 25%;And under conditions of the average geologic grade of stope is 1%, mine grade has been brought up to 0.928% by 0.75%, mining benefit greatly improved.

Description

A kind of mining methods for being used to improve underground Caving Method with Large Space ore drawing in stope grade
Technical field
It is specifically that one kind is used to improve underground Caving Method with Large Space ore drawing in stope product the present invention relates to underground mining technology field The mining methods of position.
Background technology
Mine down-hole mining loss, the height of the rate of dilution directly influence the exploitation benefit in mine.Reduce mining loss, poor Rate, improves mine grade, and reduction mining cost, raising exploitation benefit tool are of great significance.
At present, deeps mines are continued to what open air trestle was exploited, usually used mining methods are that bottom-column-free sectional collapses Fall method, this method mature technology is easy to use, positive role is served to start up of mine production, up to production, but the technique is to cover Ore drawing is carried out under the conditions of overburden, with the releasing of broken ore, barren rock covering layer is also released therewith, this method is present Problems with:One is that ore losses, the rate of dilution are higher, and according to actual field statistics, when being exploited using this method, mine is averagely damaged Mistake rate is up to 23%, the average rate of dilution 25%, and loss, the rate of dilution are higher;Two be that mine grade is low, mining benefit is poor, is adopted Copper mine is exploited with this method, about 500,000 tons of Copper Ores are produced in year, average grade 0.75% loses 20,000,000 yuan or so year.
The content of the invention
It is an object of the invention to provide a kind of mining methods for being used to improve underground Caving Method with Large Space ore drawing in stope grade, to solve Prior art is higher using ore losses, the rate of dilution of sublevel caving method without sill pillar presence, and mine grade is low, exploitation benefit is poor The problem of.
In order to solve the above technical problems, the technical scheme that the present invention takes is as follows:One kind is adopted for improving underground Caving Method with Large Space The mining methods of field mine grade, comprise the following steps:
A, the reserved fore-set of setting:By it is upper segmentation covering layer lower boundary to its following 2.3-2.5m altitude range, two adjacent time The ore body of perpendicular bisector width range of center line in roadway line is adopted as reserved fore-set;
B, setting open-stope method blasthole:Arrange some below reserved fore-set altitude range, on the ore body of reserved fore-set width range Arrange open-stope method blasthole;
C, setting open-stope method shot hole blasting device:Primacord, primacord extension are set in open-stope method blasthole from bottom hole to aperture 1.2-1.5m outside to open-stope method blasthole, then fills explosive into open-stope method blasthole, aperture is blocked with tamper, will finally rise Quick-fried system is connected on the primacord outside open-stope method blasthole;
D, setting Caving Method with Large Space blasthole:In two row's open-stope method blasthole centre positions, the height below upper segmentation covering layer lower boundary Arrangement arrangement Caving Method with Large Space method blasthole in scope, the ore body of reserved fore-set width range;
E, setting Caving Method with Large Space shot hole blasting device:Bottom hole position sets length quick-fried for leading for 500-600mm in Caving Method with Large Space blasthole Rope, by non-electrical millisecond delay cap colligation on primacord, and extends to Caving Method with Large Space blasthole by non-electrical millisecond delay cap payment to a porter Outer 1.2-1.5m, then fills explosive into Caving Method with Large Space blasthole, aperture is blocked with tamper, be finally connected to initiation system In the non-electrical millisecond delay cap payment to a porter extended outside Caving Method with Large Space blasthole;
F, according to the first row's open-stope method blasthole ore removal of explosion one, then the row's Caving Method with Large Space blasthole ore removal of explosion one order ore removal successively, directly Terminate to whole stope drift active workings back production.
In above-mentioned steps f, after open-stope method shot hole blasting, under the conditions of the small barnyard of reserved fore-set formation, according to Caving System The ratio ore removal of stone amount 100%, realizes the Dilutionless drawing under the conditions of small barnyard;And after Caving Method with Large Space shot hole blasting, covered being mixed with Under conditions of overburden, according to the ratio ore removal of broken ore amount 90%, can avoid waste rock overburden it is a large amount of be mixed into cause it is poor Rate is too high.
Caving Method with Large Space blasthole is fan shaped medium length hole vertically upward, whole piece back production in open-stope method blasthole and step d in step b Blasthole in tunnel is once constructed completion.
In step c and step e, tamper underground sludge, breaking rope and accelerated cement are with 85%:10%:5% ratio is matched somebody with somebody System is formed, convenient material drawing, and has carried out effective twice laid.
After Caving Method with Large Space shot hole blasting during ore removal, shovel of the ore removal equipment on the quick-fried heap of ore takes mode to be " the first from left in one It is right ", i.e., close to the quick-fried heap shovel in stope drift active workings center take a scraper bowl, on the left of stope drift active workings the quick-fried heap shovel of side take a scraper bowl, close to time Adopt the quick-fried heap shovel of side on the right side of tunnel and take a scraper bowl so that the waste rock overburden level of approximation above Caving System rock burst heap declines, it is to avoid Waste rock overburden is mixed into advance, causes the generation of too early depletion issues.
The present invention has the advantages that relative to prior art:
1st, the present invention is rationally provided with reserved fore-set, realizes the Dilutionless drawing under the conditions of small barnyard.By setting open-stope method Blasthole, using the reserved fore-set that height is 2.3-2.5m is formd after open-stope method shot hole blasting device explosion, by waste rock overburden Temporarily cut-off artificially forms the condition that ore drawing is carried out under small barnyard, under the conditions of the ore drawing, obtained above reserved fore-set The all ores of mineral arrived, without barren rock, have fundamentally prevented because being mixed into for waste rock overburden causes ore dilution to show The generation of elephant, realizes Dilutionless drawing.
2nd, the present invention uses rational ore removal method, and ore drawing amount is efficiently controlled.After open-stope method shot hole blasting, Ore removal is carried out under the conditions of the small barnyard of reserved fore-set formation, all goes out broken ore according to the ratio of broken ore amount 100% It is complete;After Caving Method with Large Space shot hole blasting, ore removal is carried out under conditions of covering layer is mixed with, according to the ratio of broken ore amount 90% Carry out ore removal, it is to avoid a large amount of be mixed into of waste rock overburden causes the problem of rate of dilution is too high to occur.
3rd, the present invention realizes Low dilution ore-drawing, and goaf has obtained timely processing.After Caving Method with Large Space shot hole blasting, barren rock covers Cap rock and broken ore insertion below, with the releasing of broken ore, waste rock overburden is also released therewith, in ore removal process In, goaf has obtained the filling of waste rock overburden in the case of unexposed.It is Dilutionless drawing under the conditions of small barnyard, The ore removal for being mixed with control 90% under the conditions of covering layer is a small amount of Dilution Drawing, an emptying field ore drawing and row's Ore Drawing for Caving Method Circulation realize Low dilution ore-drawing.
4th, the present invention takes mode using rational shovel, decline waste rock overburden level of approximation, it is to avoid waste rock overburden Be mixed into advance.By taking the shovel of " the first from left is right in one " to take mode, Caving System rock burst heap uniformly declines so that Mine-rock in Caving Method Waste rock overburden level of approximation above quick-fried heap declines, it is to avoid too early depletion issues caused by waste rock overburden is mixed into advance Occur.
5th, the present invention considerably reduces ore losses, the rate of dilution, improves mine grade and exploitation benefit, and mine is average Loss late have decreased to 5.8% from 23%, and the average rate of dilution drops to 7.2% from 25%;Using recovery method of the present invention, mine year is raw About 500,000 tons of production capacity power, geologic grade 1% keeps constant, and mine grade can bring up to 0.928% by 0.75%, and the benefit of wound more than year is about 31150000 yuan.
Brief description of the drawings
Fig. 1 is the stope structure schematic diagram of mining methods of the present invention;
Fig. 2 is the left view of open-stope method steel for shot in Fig. 1;
Fig. 3 is the left view of Caving Method with Large Space steel for shot in Fig. 1;
Fig. 4 is open-stope method shot hole blasting installation drawing of the present invention;
Fig. 5 is Caving Method with Large Space shot hole blasting installation drawing of the present invention;
In figure:1st, stope drift active workings, 2, connection roadway, 3, covering layer, 4, open-stope method blasthole, 5, Caving Method with Large Space blasthole, 6, reserved top Post, 7, stope drift active workings center line line perpendicular bisector, 8, ore body, 9, rock mass, 10, primacord, 11, explosive, 12, non-electrical millisecond Delay detonator payment to a porter, 13, tamper, 14, non-electrical millisecond delay cap, 15, ore removal equipment.
Embodiment
For a better understanding of the present invention, the present invention is made further specifically with reference to the accompanying drawings and detailed description It is bright.
As Figure 1-5, a kind of mining methods for being used to improve underground Caving Method with Large Space ore drawing in stope grade of the present invention, including with Lower step:
Step 1: setting reserved fore-set 6:By it is upper segmentation the lower boundary of covering layer 3 to its following 2.3-2.5m altitude range, two The ore body 8 of the perpendicular bisector width range of the adjacent center line line of stope drift active workings 1 is used as reserved fore-set 6(Fig. 1-3);
Step 2: setting open-stope method blasthole 4:Below the reserved altitude range of fore-set 6, on the ore body 8 of the reserved width range of fore-set 6 The fan shaped medium length hole of some rows vertically upward is arranged, open-stope method blasthole 4 is used as(Fig. 1-2);
Step 3: setting open-stope method shot hole blasting device:Primacord 10 is set from bottom hole to aperture in open-stope method blasthole 4, led Quick-fried rope 10 extends to the outer 1.2-1.5m of open-stope method blasthole 4, then fills explosive into open-stope method blasthole 4, by aperture Underground Mud, breaking rope and accelerated cement are with 85%:10%:5% tamper 13 being formulated is blocked, and initiation system finally is connected into sky On primacord 10 outside field method blasthole 4(Fig. 4);
Step 4: setting Caving Method with Large Space blasthole 5:In the centre position of two row's open-stope method blasthole 4, in the upper segmentation lower boundary of covering layer 3 Fan shaped medium length hole vertically upward is arranged on following altitude range, the ore body 8 of the reserved width range of fore-set 6, Caving Method with Large Space big gun is used as Hole 5(Fig. 1, Fig. 3);
Step 5: setting Caving Method with Large Space shot hole blasting device:Bottom hole position sets length to be 500-600mm in Caving Method with Large Space blasthole 5 Primacord 10, by the colligation of non-electrical millisecond delay cap 14 on primacord, and non-electrical millisecond delay cap payment to a porter 12 is extended To the outer 1.2-1.5m of Caving Method with Large Space blasthole 5, then fill explosive into Caving Method with Large Space blasthole 5, by aperture with identical in step 3 Tamper 13 is blocked, and finally initiation system is connected in the non-electrical millisecond delay cap payment to a porter 12 of the outer extension of Caving Method with Large Space blasthole 5 (Fig. 5);
Step 6: according to the first ore removal of one row's open-stope method blasthole of explosion 4, then the ore removal of one row's Caving Method with Large Space blasthole of explosion 5 order successively Ore removal, until the whole back production of stope drift active workings 1 terminates.Wherein, after the explosion of open-stope method blasthole 4, in the small barnyard of the reserved formation of fore-set 6 Under the conditions of, according to the ratio ore removal of broken ore amount 100%, by ore removal equipment 15 via the connection roadway 2 of the bottom of rock mass 9 by ore deposit Stone is transported;After the explosion of Caving Method with Large Space blasthole 5, under conditions of covering layer 3 is mixed with, according to the ratio ore removal of broken ore amount 90%, During ore removal, shovel of the ore removal equipment 15 on the quick-fried heap of ore takes mode to be " the first from left is right in one ", i.e., quick-fried close to the center of stope drift active workings 1 Heap shovel takes a scraper bowl, a scraper bowl is taken close to the quick-fried heap shovel of the left side of stope drift active workings 1 side, close to the right side of stope drift active workings 1 side, quick-fried heap shovel takes one Scraper bowl, finally transports ore via the connection roadway 2 of the bottom of rock mass 9(Fig. 1).

Claims (8)

1. a kind of mining methods for being used to improve underground Caving Method with Large Space ore drawing in stope grade, it is characterised in that comprise the following steps:
A, the reserved fore-set of setting:By upper segmentation covering layer(3)Lower boundary to its following 2.3-2.5m altitude range, two it is adjacent Stope drift active workings(1)The ore body of the perpendicular bisector width range of center line line(8)It is used as reserved fore-set(6);
B, setting open-stope method blasthole:In reserved fore-set(6)Below altitude range, reserve fore-set(6)The ore body of width range(8)On Arrange some row's open-stope method blastholes(4);
C, setting open-stope method shot hole blasting device;
D, setting Caving Method with Large Space blasthole:In two row's open-stope method blastholes(4)Centre position, in upper segmentation covering layer(3)Lower boundary with Lower altitude range, reserved fore-set(6)The ore body of width range(8)Upper arrangement Caving Method with Large Space method blasthole(5);
E, setting Caving Method with Large Space shot hole blasting device;
F, according to the first row's open-stope method blasthole of explosion one(4)Ore removal, then the row's Caving Method with Large Space blasthole of explosion one(5)The order of ore removal goes out successively Ore deposit, until whole stope drift active workings(1)Back production terminates.
2. a kind of mining methods for being used to improve underground Caving Method with Large Space ore drawing in stope grade according to claim 1, its feature It is:In step f, open-stope method blasthole(4)After explosion, in reserved fore-set(6)Under the conditions of the small barnyard formed, according to broken ore The ratio ore removal of amount 100%.
3. a kind of mining methods for being used to improve underground Caving Method with Large Space ore drawing in stope grade according to claim 1, its feature It is:In step f, Caving Method with Large Space blasthole(5)After explosion, covering layer is being mixed with(3)Under conditions of, according to broken ore amount 90% Ratio ore removal.
4. a kind of mining methods for being used to improve underground Caving Method with Large Space ore drawing in stope grade according to claim 1, its feature It is:Caving Method with Large Space blasthole is fan shaped medium length hole vertically upward, whole piece back production lane in open-stope method blasthole and step d in step b Road(1)Interior blasthole is once constructed completion.
5. a kind of mining methods for being used to improve underground Caving Method with Large Space ore drawing in stope grade according to claim 1, its feature It is:In step c, the method to set up of open-stope method shot hole blasting device is in open-stope method blasthole(4)It is interior to be set from bottom hole to aperture Primacord(10), primacord(10)Extend to open-stope method blasthole(4)Outer 1.2-1.5m, then to open-stope method blasthole(4)Interior filling Explosive(11), by aperture tamper(13)Block, initiation system is finally connected to open-stope method blasthole(4)Outer primacord (10)On.
6. a kind of mining methods for being used to improve underground Caving Method with Large Space ore drawing in stope grade according to claim 1, its feature It is:In step e, the method to set up of Caving Method with Large Space shot hole blasting device is in Caving Method with Large Space blasthole(5)Interior bottom hole position sets length For 500-600mm primacord(10), by non-electrical millisecond delay cap(14)Colligation is in primacord(10)On, and by non-electrical millisecond Delay detonator payment to a porter(12)Extend to Caving Method with Large Space blasthole(5)Outer 1.2-1.5m, then to Caving Method with Large Space blasthole(5)Interior filling explosive (11), by aperture tamper(13)Block, initiation system is finally connected to Caving Method with Large Space blasthole(5)The non-electrical millisecond of outer extension Delay detonator payment to a porter(12)On.
7. a kind of mining methods for being used to improve underground Caving Method with Large Space ore drawing in stope grade according to claim 5 or 6, it is special Levy and be:The tamper(13)With underground sludge, breaking rope and accelerated cement with 85%:10%:5% proportions are formed.
8. a kind of mining methods of raising underground Caving Method with Large Space ore drawing in stope grade according to claim 3, it is characterised in that: After Caving Method with Large Space shot hole blasting during ore removal, ore removal equipment(15)Shovel on the quick-fried heap of ore takes mode to be " the first from left is right in one ", i.e., Close to stope drift active workings(1)The quick-fried heap shovel in center takes a scraper bowl, close to stope drift active workings(1)Quick-fried heap shovel is helped to take a scraper bowl, close to returning in left side Adopt tunnel(1)Quick-fried heap shovel is helped to take a scraper bowl in right side.
CN201710370232.XA 2017-05-23 2017-05-23 It is a kind of for improving the mining methods of underground Caving Method with Large Space ore drawing in stope grade Active CN107131805B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108708721A (en) * 2018-04-04 2018-10-26 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 To substoping method in a kind of mechanization
CN108825239A (en) * 2018-05-31 2018-11-16 西北矿冶研究院 A kind of mining methods reducing barren rock incorporation rate

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CN101967973A (en) * 2009-07-28 2011-02-09 鞍钢集团矿业公司 Open stope-caving combined mining method
CN103114855A (en) * 2013-02-26 2013-05-22 中钢集团马鞍山矿山研究院有限公司 Jamb recovery and cushion layer formation integrated technology in process of mining from outdoors into underground
CN104358573A (en) * 2014-09-04 2015-02-18 广东安元矿业勘察设计有限公司 Block open-stope and block caving combined mining method of thick orebody
CN105041317A (en) * 2015-07-03 2015-11-11 中国瑞林工程技术有限公司 Medium-length hole shrinkage stoping method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1456788A (en) * 2003-06-06 2003-11-19 中南大学 Continuous mining process with deep hole dropping and top-bottom pillars mining in advance
CN101967973A (en) * 2009-07-28 2011-02-09 鞍钢集团矿业公司 Open stope-caving combined mining method
CN103114855A (en) * 2013-02-26 2013-05-22 中钢集团马鞍山矿山研究院有限公司 Jamb recovery and cushion layer formation integrated technology in process of mining from outdoors into underground
CN104358573A (en) * 2014-09-04 2015-02-18 广东安元矿业勘察设计有限公司 Block open-stope and block caving combined mining method of thick orebody
CN105041317A (en) * 2015-07-03 2015-11-11 中国瑞林工程技术有限公司 Medium-length hole shrinkage stoping method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108708721A (en) * 2018-04-04 2018-10-26 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 To substoping method in a kind of mechanization
CN108708721B (en) * 2018-04-04 2020-07-24 深圳市中金岭南有色金属股份有限公司凡口铅锌矿 Mechanized upward segmented stoping method
CN108825239A (en) * 2018-05-31 2018-11-16 西北矿冶研究院 A kind of mining methods reducing barren rock incorporation rate
CN108825239B (en) * 2018-05-31 2019-09-20 西北矿冶研究院 A kind of mining methods reducing barren rock incorporation rate

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