CN105333777A - Ditching blasting method for deep open pit mine - Google Patents
Ditching blasting method for deep open pit mine Download PDFInfo
- Publication number
- CN105333777A CN105333777A CN201510761946.4A CN201510761946A CN105333777A CN 105333777 A CN105333777 A CN 105333777A CN 201510761946 A CN201510761946 A CN 201510761946A CN 105333777 A CN105333777 A CN 105333777A
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- China
- Prior art keywords
- hole
- open pit
- deep open
- blasting method
- gallery
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- 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
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
Abstract
The invention relates to the field of blasting and discloses a ditching blasting method for a deep open pit mine. The method includes the following steps that firstly, the position of a gate way (10) is determined; secondly, a first through hole (20) is formed in the end, close to the stope direction, inside the gate way, and the first through hole serves as a detonating point; thirdly, a plurality of holes are formed in the position, close to the stope, outside the gate way and a detonating area is formed by the first through hole and the holes; and fourthly, explosives are loaded in the first through hole and the holes for detonating. According to the ditching blasting method for the deep open pit mine, the first through hole which is formed in the end, close to the stope direction, inside the gate way is used as the detonating point and aims at detonating the end of the gate way, and therefore it is ensured that a flood releasing well opening can be formed by a first bomb of blasting of the deep open pit mine. According to the ditching blasting method for the deep open pit mine, atmospheric precipitation and stope surface runoff can directly flow into the gate way, and safe flood draining can be achieved for blasting of the deep open pit mine.
Description
Technical field
The present invention relates to blasting technique, particularly, relate to a kind of deep open pit ditch blasting method.
Background technology
A large amount of useful mineral matters has been rich in mineral deposit, such as opencut, different with orographic condition according to the mode of occurence in mineral deposit, opencut is divided into again hillside open pit and deep open pit, wherein, what be positioned at more than Soil surface covering circle is hillside open pit, and what be positioned at below Soil surface covering circle is deep open pit.
Due to the feature of himself, deep open pit has possessed the condition collecting Atmospheric precipitation, rainwash and underground water burst, Just because of this, in the recovery process of deep open pit, how to prevent water burst is vital, because once there is water burst, not only affect production, even can cause serious consequence, this consequence comprises the stability etc. reducing device efficiency and service life, reduction mine engineering speed and destroy side slope.
In view of this, the invention provides a kind of trench digging outburst method that can prevent water burst in the recovery process of deep open pit.
Summary of the invention
The object of this invention is to provide a kind of deep open pit ditch blasting method, to avoid when exploiting deep open pit water burst occurs.
To achieve these goals, the invention provides a kind of deep open pit ditch blasting method, wherein, the method comprises the following steps:
S1: the position determining gallery;
S2: the first through hole is set in described gallery and near the end in stope direction, and using this first through hole as fire point;
S3: outer and arrange multiple hole near described stope direction at described gallery, makes described first through hole and multiple described hole form quick-fried district;
S4: blasting charge in described first through hole and multiple described hole also detonates.
Preferably, described step S2 comprises the following steps:
Length direction along described gallery arranges the second through hole apart from described first through hole predeterminable range place, not blasting charge in described second through hole.
Preferably, described first through hole is arranged in described gallery and the center of the described termination in close described stope direction, and described second through hole is arranged on the center line of described gallery.
Preferably, the described predeterminable range between described first through hole and described second through hole is 1.5-2 rice.
Preferably, described first through hole by from the aperture of described first through hole and along this first through hole centerline direction lifting sandbag and by described first through hole shutoff, think described first through hole powder charge.
Preferably, what described multiple hole different directions comprised along described first through hole was arranged multiple first ignites hole and can form rectangular-shaped multiple second and ignite holes.
Preferably, the centerline of described rectangular-shaped length direction arranges multiple described second and ignites hole, in the both sides of the centerline of described rectangular-shaped length direction along described rectangular-shaped length direction respectively correspondence arrange described second to ignite hole described rectangular-shaped to be formed.
Preferably, described first ignites Kong Weisan, and described in one of them, the first ignition hole is positioned on the center line of described rectangular-shaped length direction, and described in two other, first ignites the both sides that hole lays respectively at the center line of described rectangular-shaped length direction.
Preferably, described rectangular-shaped by arrange more described second ignite hole formed, often arranging the described second array pitch of igniting hole is 4m to 4.5m, described second of the centerline of described rectangular-shaped length direction that is positioned at of often arranging in described second ignition hole ignites the described second ignition hole of Kong Yuqi both sides at a distance of 4m to 4.5m, often arranges between other the adjacent described second ignition holes in described second ignition hole at a distance of 5.5m to 6m.
Preferably, the described second aperture of igniting hole is 200mm to 250mm, and described second degree of depth of igniting hole is 17m to 18m.
In deep open pit ditch blasting method provided by the invention, to the first through hole of the termination in also close stope direction in gallery be arranged on as fire point, object is that the termination of gallery is blown, thus guarantees that the first bombard of deep open pit explosion can form flood discharge well head.Deep open pit ditch blasting method provided by the invention can make Atmospheric precipitation, stope rainwash water flows directly into gallery (also referred to as drainage sump) (current direction is the length direction of gallery), explosion for deep open pit realizes safety and drains off floodwaters, that is, deep open pit ditch blasting method provided by the invention solves the problem that dark recessed excavating plant drains off floodwaters.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for description, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the reference view of deep open pit ditch blasting method provided by the invention.
Description of reference numerals
10: gallery; 20: the first through holes;
Ignite hole at 31: the second; Ignite hole at 32: the first;
40: the second through holes; 50: the edge of stope.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the noun of locality such as " upper and lower, left and right " of use typically refers to reference to upper and lower, left and right shown in the drawings; " inside and outside " refers to profile inside and outside relative to each parts itself.
In the recovery process of deep open pit, easily gush water problem based in prior art, the invention provides a kind of deep open pit ditch blasting method, with reference to figure 1, the method comprises the following steps: S1: the position determining gallery 10; S2: the first through hole 20 is set in gallery 10 and near the termination in stope direction, and using this first through hole 20 as fire point; S3: outer and arrange multiple hole near stope direction at gallery 10, makes the first through hole 20 form quick-fried district with multiple hole; S4: blasting charge in the first through hole 20 and multiple hole also detonates.
In deep open pit ditch blasting method provided by the invention, to be arranged in gallery 10 and the first through hole 20 near the termination in stope direction as fire point, object is that the termination of gallery is blown, thus guarantees that the first bombard of deep open pit explosion can form flood discharge well head.Deep open pit ditch blasting method provided by the invention can make Atmospheric precipitation, stope rainwash water flows directly into gallery (also referred to as drainage sump) (current direction is the length direction of gallery 10), explosion for deep open pit realizes safety and drains off floodwaters, that is, deep open pit ditch blasting method provided by the invention solves the problem that dark recessed excavating plant drains off floodwaters.
Wherein, described step S2 comprises the following steps: arrange the second through hole 40 along the length direction of gallery 10 apart from the first through hole 20 predeterminable range place; not blasting charge in this second through hole 40; that is using the second through hole 40 as emptying aperture; for the protection of the edge 50 of stope, in other words, the present invention is the hole wall utilizing the explosion of the first through hole 20 to destroy the second through hole 40; and there is no blasting charge due to the second through hole 40, therefore less on the impact at the edge 50 of stope.In addition, why the first through hole 20 and the second through hole 40 are all set to through hole (namely making the first through hole 20 and the second through hole 40 all penetrate gallery), draining during first bombard perforation when object is to be beneficial to explosion.
In order to facilitate draining, described first through hole 20 is arranged in the gallery 10 and center of the described gallery termination in close described stope direction, and the second through hole 40 is arranged on the center line of gallery 10.Wherein, the predeterminable range between described first through hole 20 and the second through hole 40 is 1.5-2 rice.
Wherein, the first through hole 20 as fire point needs can powder charge by shutoff bottom it, particularly, the first through hole 20 can by from the aperture of the first through hole 20 and along this first through hole 20 centerline direction lifting sandbag and by the first through hole 20 shutoff.
In addition, what described multiple hole different directions comprised along the first through hole 20 was arranged multiple first ignites hole 32 and can form rectangular-shaped multiple second and ignite holes 31, the space of the both sides, termination in the close stope direction of gallery can be blown so easily, thus be convenient to the well head (namely sluice well head) that gallery excavated by machinery.
Particularly, the centerline of described rectangular-shaped length direction arranges multiple described second and ignites hole 31, in the both sides of the centerline of described rectangular-shaped length direction along described rectangular-shaped length direction respectively correspondence arrange described second to ignite hole 31 described rectangular-shaped to be formed.That is, the second pattern igniting hole 31 can adopt middle cut blasting method cloth hole.
Wherein, described first ignition hole 32 is three, and described in one of them, the first ignition hole 32 is positioned on the center line of described rectangular-shaped length direction, and described in two other, first ignites the both sides that hole 32 lays respectively at the center line of described rectangular-shaped length direction.It should be noted that, direction of the detonating when direction of arrow in Fig. 1 is explosion, namely the first through hole 20 first detonates, and then ignites hole 32 explosion thereupon for three first, the second last ignites hole 31 explosion, and wherein the second explosion of igniting hole 31 is also according to the direction of arrow Hole-by-hole initiating in figure.
In addition, described rectangular-shaped by arrange more described second ignite hole 31 formed, because the first bombard water in the second ignition hole 31 is many, become porosity not high, therefore encryption perforation is needed, concrete, often arranging the described second array pitch of igniting hole 31 is 4m to 4.5m, often arrange the described second described second of centerline of described rectangular-shaped length direction that is positioned at of igniting in hole 31 to ignite hole 31 and ignites hole 31 at a distance of 4m to 4.5m with described second of its both sides, often arrange described second ignite other in hole 31 adjacent described second to ignite between holes 31 5.5m to 6m apart.
Wherein, described second ignites hole 31 (can be straight hole) can adopt rotary drill to bore a hole, and its aperture can be 200mm to 250mm, and penetration depth can be 17m to 18m.In addition, ignite hole 31 about second, in practical operation, can with reference to following data:
(1) filling height (filling highly refers to that hole depth deducts shot elevation): generally, filling is highly not less than 7.5 meters, is preferably 8 meters.
The explosive payload in (2) second ignition holes 31: load in mixture medicine every meter explosive payload and calculate by 60kg, shot elevation is at 10-11 rice, and every hole dose is 600-660kg, gets maximum dose 600kg.In addition, because explosive specific charge (explosive specific charge refers to the explosive charge that explosion unit ore deposit rock is on average used) not only affects demolition effect, also be directly connected to production cost and the job safety of ore, therefore need to choose suitable explosive specific charge, such as explosive specific charge can be 3600-4000kg/ ten thousand tons, and ore proportion calculates by 3.04 by 4.0 calculating, Rock Specific Gravity.
(3) blasting scale: each quick-fried district is by total dose about 10 tons tissue.
(4) safety compute: because deep open pit sluicing well head (namely the termination in the close stope direction of gallery 10) is usually comparatively near apart from the edge 50 of stope, therefore maximum velocity of vibration will meet the security needs at the edge 50 of stope.
(5) initiation net: adopt the auspicious triumphant detonator of Australia, uses 400ms detonator, hole-by-hole initiation in the second ignition hole 31.
Deep open pit ditch blasting method provided by the invention can make Atmospheric precipitation, stope rainwash water flows directly into gallery 10, explosion for deep open pit realizes safety and drains off floodwaters, that is, deep open pit ditch blasting method provided by the invention solves the problem that dark recessed excavating plant drains off floodwaters, thus impact can be avoided to produce, and avoid the stability etc. that reduces device efficiency and service life, reduction mine engineering speed and destroy side slope.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (10)
1. a deep open pit ditch blasting method, is characterized in that, the method comprises the following steps:
S1: the position determining gallery (10);
S2: the first through hole (20) is set in described gallery (10) and near the end in stope direction, and using this first through hole (20) as fire point;
S3: also arrange multiple hole near described stope direction outward at described gallery (10), makes described first through hole (20) and multiple described hole form quick-fried district;
S4: blasting charge in described first through hole (20) and multiple described hole also detonates.
2. deep open pit ditch blasting method according to claim 1, it is characterized in that, described step S2 comprises the following steps:
Length direction along described gallery (10) arranges the second through hole (40) apart from described first through hole (20) predeterminable range place, not blasting charge in described second through hole (40).
3. deep open pit ditch blasting method according to claim 2, it is characterized in that, described first through hole (20) is arranged in described gallery (10) and the center of the described termination in close described stope direction, and described second through hole (40) is arranged on the center line of described gallery (10).
4. deep open pit ditch blasting method according to claim 3, is characterized in that, the described predeterminable range between described first through hole (20) and described second through hole (40) is 1.5-2 rice.
5. deep open pit ditch blasting method according to claim 1, it is characterized in that, described first through hole (20) by from the aperture of described first through hole (20) and along this first through hole (20) centerline direction lifting sandbag and by the shutoff of described first through hole (20), think the powder charge of described first through hole (20).
6. deep open pit ditch blasting method according to claim 1, it is characterized in that, what described multiple hole different directions comprised along described first through hole (20) was arranged multiple first ignites hole (32) and can form rectangular-shaped multiple second and ignite hole (31).
7. deep open pit ditch blasting method according to claim 6, it is characterized in that, the centerline of described rectangular-shaped length direction arranges multiple described second and ignites hole (31), in the both sides of the centerline of described rectangular-shaped length direction along described rectangular-shaped length direction respectively correspondence arrange described second to ignite hole (31) described rectangular-shaped to be formed.
8. deep open pit ditch blasting method according to claim 7, it is characterized in that, described first ignition hole (32) is three, first ignition hole (32) described in one of them is positioned on the center line of described rectangular-shaped length direction, and described in two other, first ignites the both sides that hole (32) lays respectively at the center line of described rectangular-shaped length direction.
9. deep open pit ditch blasting method according to claim 7, it is characterized in that, described rectangular-shaped by arrange more described second ignite hole (31) formed, often arranging the described second array pitch of igniting hole (31) is 4m to 4.5m, often arrange the described second described second ignition hole (31) being positioned at the centerline of described rectangular-shaped length direction of igniting in hole (31) and ignite hole (31) at a distance of 4m to 4.5m with described second of its both sides, often arrange between other adjacent described second ignition hole (31) in described second ignition hole (31) at a distance of 5.5m to 6m.
10. according to the deep open pit ditch blasting method in claim 6-9 described in any one, it is characterized in that, described second aperture of igniting hole (31) is 200mm to 250mm, and described second degree of depth of igniting hole (31) is 17m to 18m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510761946.4A CN105333777B (en) | 2015-11-10 | 2015-11-10 | A kind of deep open pit ditch blasting method |
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| CN201510761946.4A CN105333777B (en) | 2015-11-10 | 2015-11-10 | A kind of deep open pit ditch blasting method |
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| CN105333777A true CN105333777A (en) | 2016-02-17 |
| CN105333777B CN105333777B (en) | 2017-03-29 |
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| CN101319862A (en) * | 2007-06-08 | 2008-12-10 | 鞍钢集团矿业公司 | Novel horizontal trenching and vertical deep borehole initiation method for deep concave strip mine |
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| CN102116156A (en) * | 2010-04-28 | 2011-07-06 | 鞍钢集团矿业公司 | Slope expansion and blasting method for mining deep concave open-pit mine by stages |
| CN102619517A (en) * | 2012-04-26 | 2012-08-01 | 辽宁科技大学 | Overlaying rock cemented pillarless sublevel caving method |
| CN102927866A (en) * | 2012-11-16 | 2013-02-13 | 鞍钢集团矿业公司 | Open-bench blasting method capable of controlling forward stroke of blasting muck pile |
| CN103278052A (en) * | 2013-06-04 | 2013-09-04 | 贵州新联爆破工程集团有限公司 | Blasthole water discharge method for |
| CN104748632A (en) * | 2015-04-03 | 2015-07-01 | 核工业井巷建设公司 | Underwater rock plug blasting construction method |
-
2015
- 2015-11-10 CN CN201510761946.4A patent/CN105333777B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101319862A (en) * | 2007-06-08 | 2008-12-10 | 鞍钢集团矿业公司 | Novel horizontal trenching and vertical deep borehole initiation method for deep concave strip mine |
| CN101846484A (en) * | 2010-04-02 | 2010-09-29 | 攀钢集团冶金工程技术有限公司 | Blasting method of driving, mining and cutting drift under ultrahard fault |
| CN102116156A (en) * | 2010-04-28 | 2011-07-06 | 鞍钢集团矿业公司 | Slope expansion and blasting method for mining deep concave open-pit mine by stages |
| CN102619517A (en) * | 2012-04-26 | 2012-08-01 | 辽宁科技大学 | Overlaying rock cemented pillarless sublevel caving method |
| CN102927866A (en) * | 2012-11-16 | 2013-02-13 | 鞍钢集团矿业公司 | Open-bench blasting method capable of controlling forward stroke of blasting muck pile |
| CN103278052A (en) * | 2013-06-04 | 2013-09-04 | 贵州新联爆破工程集团有限公司 | Blasthole water discharge method for |
| CN104748632A (en) * | 2015-04-03 | 2015-07-01 | 核工业井巷建设公司 | Underwater rock plug blasting construction method |
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| CN105333777B (en) | 2017-03-29 |
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