CN109506536A - A kind of method of the quick-fried heap width of optimal control surface mine bench blasting - Google Patents
A kind of method of the quick-fried heap width of optimal control surface mine bench blasting Download PDFInfo
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- CN109506536A CN109506536A CN201811444458.0A CN201811444458A CN109506536A CN 109506536 A CN109506536 A CN 109506536A CN 201811444458 A CN201811444458 A CN 201811444458A CN 109506536 A CN109506536 A CN 109506536A
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- 238000005422 blasting Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004880 explosion Methods 0.000 claims abstract description 29
- 238000012360 testing method Methods 0.000 claims abstract description 17
- 238000000611 regression analysis Methods 0.000 claims abstract description 6
- 238000004364 calculation method Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 239000002360 explosive Substances 0.000 claims description 9
- 241000209094 Oryza Species 0.000 claims description 6
- 235000007164 Oryza sativa Nutrition 0.000 claims description 6
- 235000009566 rice Nutrition 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 2
- 239000011435 rock Substances 0.000 abstract description 10
- 238000005457 optimization Methods 0.000 abstract description 4
- 238000005065 mining Methods 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000010219 correlation analysis Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a kind of methods of the quick-fried heap width of optimal control surface mine bench blasting to return quick-fried heap width L when obtaining single row of holes explosion using regression analysis0With clear quarrel variable and stay the regression equation of quarrel variable respectively: when being cut clearly: L0=A1+B1·(h1/ W), wherein A1And B1To return numerical value；When staying quarrel: L0=A2+B2·[h1/ (W+S)], wherein A2And B2To return numerical value.It by a large amount of field test data combination blasthole array pitch parameters, predicts quick-fried heap width and carries out field demonstration, and then instruct blasting parameters optimization according to field condition.The method of the present invention can instruct blasting parameters optimization, preferably control quick-fried heap width, reduce quick-fried heap extension and lower throwing amount, improve shovel dress efficiency；While guaranteeing that Highwall mining is safe, slope of stope angle is improved, reduces rock overburden amount, reduces mine blasting cost of winning.The present invention has similar abrupt slope exploitation surface mine promotes reference function well.
Description
Technical field
The invention belongs to air bench blasting technical field more particularly to a kind of optimal control surface mine bench blasting are quick-fried
The method of heap width.
Background technique
Opencast technical process is general are as follows: perforation, explosion, shovel dress, transport and row's rock, each process link are mutually held in the mouth
It connects, influence each other, mutually restrict, constitute the opencast most basic production cycle.Explosion is opencast one important
Whole ore-rock is crushed by bursting work, is loosened, forms the big gun heap of certain shapes by process, pretends industry for subsequent adopt
Operating condition is provided.Blasting work quality, the quality of demolition effect, which directly affect, subsequent adopt the production efficiency for pretending industry and adopts
Fill operating cost；Wherein quick-fried heap width is an important control content, is become apparent especially for the mine of abrupt slope exploitation,
Slope angle can be preferably improved, rock overburden amount is reduced, removing cost is reduced, creates significant economic benefit.
" analyses of opencut electric shovel dress efficiency affecting factors " basis that the 5th phase of " chemical mine technology " nineteen ninety-five delivers
The correlation analysis of efficiency power shovel and quick-fried heap width measured data, obtains relation curve between the two, the results showed that power shovel effect
Rate increases with quick-fried heap width and is improved, but when quick-fried heap width is more than certain value, efficiency power shovel declines instead, this is because quick-fried heap
Width is excessive, and quick-fried heap laxity is not to influence the principal element of efficiency power shovel, and excessively thin quick-fried heap drops efficiency power shovel obviously
It is low." prediction technique of the quick-fried heap width of step demolition of strip mines " Wen Zhongti that the 2nd phase of " western mineral exploration engineering " nineteen ninety-five delivers
Out according to the maximum initial velocity of Rock Displacement Movement and maximum casting distance, the quick-fried heap forward setting distance of production resettlement is predicted.
Therefore, it optimal control and predicts the quick-fried heap width of surface mine bench blasting, shovels dress efficiency for improving, reduces and remove
Amount improves slope of stope angle, is of great significance.
Summary of the invention
The purpose of the present invention is be exactly to solve quick-fried heap length prediction difficulty and nothing in existing surface mine bench blasting
Method accomplishes the technical problem with shovel dress coordination optimization, and provides a kind of side of quick-fried heap width of optimal control surface mine bench blasting
Method shovels dress efficiency to improve, avoids ore-rock from reversely transporting, increase slope of stope angle, reduces rock and removes cost, while improving and adopting
Field step production safety.
Experimental study shows that the principal element for influencing quick-fried heap width L has: the powder charge section in front-seat blasthole on production step
Height h1, the width W of toe burden, quick-fried heap stay quarrel thickness S, multiple-row blasting section blocking quality (including blocking section height h2
And compactness) and charge constitution, rock mass characteristic, explosive property, firing order.In lithology, explosive property, charge constitution etc.
In the case where certain, to quick-fried heap width L when determining single row of holes explosion0Two key variables that value plays a major role: h1/W、h1/(W
+ S), wherein h1/ W is clear quarrel variable, h1/ (W+S) is to stay quarrel variable.
Above-mentioned purpose to realize the present invention, a kind of side of the quick-fried heap width of optimal control surface mine bench blasting of the present invention
Method is realized by following steps:
1) according to the blasting parameter of design: aperture, pitch-row, hole depth, charge constitution, on surface mine production step
Arrange front-seat blasthole, front-seat the number of the boring hole is controlled according to field condition in 3~5 ranges；Front-seat blasthole and bench slope bottom
Width be toe burden width W；When staying quarrel, the quick-fried heap width in scope of freedom direction is to stay quarrel thickness S in front of production step；
2) according to the explosive payload of design, explosive is packed into blast hole projectile filling section, the height of blast hole projectile filling section in front-seat blasthole
Degree is h1；It is blocked in multiple-row blasting section, the height h of strict control multiple-row blasting section2And the compactness of blocking；Then connect
Blasting circuit is connect, is detonated after errorless on inspection；
3) the quick-fried heap width after explosion, using rangefinder, steel tape or other dimensional measuring instruments, after measuring explosion；
4) according to above-mentioned steps, for different lithology, quarrel two schemes are cut and are stayed clearly, carry out 15~35 live explosion examinations
It tests, improves the reliability of experimental data；
In the step, the quick-fried heap width L measured using 22~30 field tests0Data carry out regression analysis and are preferred.It is secondary
Number is very few, has an impact to accuracy, reliability；Number is excessive, and the field test time is long, at high cost.
5) the quick-fried heap width data by step 3), 4) measured, using regression analysis, when recurrence obtains single row of holes explosion
Quick-fried heap width L0Respectively with clear quarrel variable h1/ W and stay quarrel variable h1The regression equation of/(W+S):
When clear quarrel: L0=A1+B1·(h1/ W), wherein A1And B1To return numerical value；
When staying quarrel: L0=A2+B2·[h1/ (W+S)], wherein A2And B2To return numerical value；
L0Quick-fried heap width when single shot hole blasting, the unit of each parameter is rice in formula；
6) width of quick-fried heap (5) is determined according to each blasting hole number of rows N and blasthole array pitch b using multiple rows of shot hole blasting again
Spend LiCalculation formula:
When clear quarrel: Li=A1+B1·(h1/W)+(N-1)×b；
When staying quarrel: Li=A2+B2·[h1/(W+S)]+(N-1)×b；
In formula: LiQuick-fried heap width when multiple rows of shot hole blasting, N- blasthole number of rows, the unit of other each parameters are rice；
7) the live explosion bulge test for carrying out different blasthole number of rows N, measures actual quick-fried heap width L, with formula calculated result
It compares, verifies the accuracy of calculation formula；
8) calculation formula according to the quick-fried heap width L of the quick-fried heap obtained, changes further according to field condition, predicts other steps
The quick-fried heap width of explosion instructs the adjustment of blasting parameter, direction of detonating, guarantees shotfiring safety, avoid being flushed to following platform under quick-fried heap
Rank improves shovel dress efficiency.
Test result shows that the present invention carries out regression analysis by a large amount of live Burst Test Data, and through testing
Card has very high reliability and confidence level.
A kind of method of the quick-fried heap width of optimal control surface mine bench blasting of the present invention after the above technical solution is adopted, takes
What is obtained has the beneficial effect that
(1) blasting parameters optimization can be instructed, quick-fried heap width is preferably controlled, quick-fried heap extension and lower throwing amount is reduced, improves
Shovel dress efficiency
(2) while guaranteeing that Highwall mining is safe, slope of stope angle is improved, reduces rock overburden amount, reduces mine blasting
Cost of winning.
Detailed description of the invention
Fig. 1 is a kind of bench blasting planar cloth of the method for the quick-fried heap width of optimal control surface mine bench blasting of the present invention
Set schematic diagram；
Fig. 2 is a kind of bench blasting section of the method for the quick-fried heap width of optimal control surface mine bench blasting of the present invention
Arrangement schematic diagram；
The quick-fried heap width L of single row of holes explosion when Fig. 3 is clear quarrel0With h1The relational graph of/W；
Fig. 4 is the quick-fried heap width L of single row of holes explosion when staying quarrel0With h1The relational graph of/(W+S).
Appended drawing reference are as follows: 1- produces step；2- blasthole；3- blast hole projectile filling section, height h1；4- multiple-row blasting section, height h2；
The quick-fried heap of 5-, width L；6- bench slope.
Specific embodiment
To better describe the present invention, with reference to the accompanying drawings and examples to a kind of optimal control surface mine platform of the present invention
The method of the quick-fried heap width of rank explosion is described in further detail.
A kind of bench blasting of the method for the quick-fried heap width of optimal control surface mine bench blasting of the present invention as shown in Figure 1
Plan view simultaneously combines Fig. 2 to find out, a kind of method of the quick-fried heap width of optimal control surface mine bench blasting of the present invention,
It is realized by following technique, step:
1) according to the blasting parameter of design: aperture, pitch-row, hole depth, charge constitution produce step 1 in surface mine
The front-seat blasthole 2 of upper arrangement, front-seat 2 quantity of blasthole are controlled according to field condition in 3~5 ranges；Front-seat blasthole 2 and bench slope
The width of 7 bottoms is toe burden width W；When staying quarrel, the quick-fried heap width in production 1 front scope of freedom direction of step is to stay quarrel
Thickness S；
2) according to the explosive payload of design, explosive is packed into blast hole projectile filling section 3 in front-seat blasthole 2, blast hole projectile filling section 3
Height is h1；It is blocked in multiple-row blasting section 4, the height h of strict control multiple-row blasting section 42And the compactness of blocking；So
After connect blasting circuit, detonate after errorless on inspection；
3) the quick-fried heap width after explosion, using rangefinder, steel tape or other dimensional measuring instruments, after measuring explosion；
4) according to above-mentioned steps, for different lithology, quarrel two schemes are cut and are stayed clearly, carry out 15~35 live explosion examinations
It tests, improves the reliability of experimental data；It is preferred in the step 2) using 22~30 field tests.
5) the quick-fried heap width data by step 3), 4) measured, using regression analysis, when recurrence obtains single row of holes explosion
Quick-fried heap width L0Respectively with clear quarrel variable h1/ W and stay quarrel variable h1The regression equation of/(W+S):
When clear quarrel: L0=A1+B1·(h1/ W), wherein A1And B1To return numerical value；
When staying quarrel: L0=A2+B2·[h1/ (W+S)], wherein A2And B2To return numerical value；
L0Quick-fried heap width when single shot hole blasting, the unit of each parameter is rice in formula；
6) width of quick-fried heap 5 is determined according to each blasting hole number of rows N and blasthole array pitch b using multiple rows of shot hole blasting again
LiCalculation formula:
When clear quarrel: Li=A1+B1·(h1/W)+(N-1)×b；
When staying quarrel: Li=A2+B2·[h1/(W+S)]+(N-1)×b；
In formula: LiQuick-fried heap width when multiple rows of shot hole blasting, N- blasthole number of rows, the unit of other each parameters are rice；
7) the live explosion bulge test for carrying out different blasthole number of rows N, measures actual quick-fried heap width L, with formula calculated result
It compares, verifies the accuracy of calculation formula；
8) calculation formula according to the quick-fried heap width L of the quick-fried heap 5 obtained, changes further according to field condition, predicts other
The quick-fried heap width of rank explosion instructs the adjustment of blasting parameter, direction of detonating, guarantees shotfiring safety, avoid being flushed under quick-fried heap following
Step improves shovel dress efficiency.
Here quick-fried heap width L both includes L0, also include Li。
Case study on implementation: certain produces 5000000 tons of large-scale outdoors iron ore, blasthole diameter 250mm, using powdery emulsifying explosive per year；
Pitch-row 6.5m~7m when normal blasting, array pitch b=5.6m~6m；Buffer blasting pitch-row 6m~6.5m, array pitch b=5.2m~
5.6m；Width W=8m~8.5m of toe burden, ultra-deep 2m.Ignition plan uses oblique initiation, and the blasthole of every separate explosion is arranged
The number row of N=2~4.
1) when clear quarrel, h1The Ratio control of/W, by a large amount of field tests, has obtained single row of holes explosion 0.45~0.71
When quick-fried heap width L0With h1The relation equation of/W, L0=-5.2268+39.199 (h1/ W), when clear quarrel as shown in Figure 3, is single
The quick-fried heap width L of Hole placing blast0With h1The relational graph of/W.
When more Hole placing blasts, quick-fried heap width Li=-5.2268+39.199 (h1/W)+(N-1)×5.8。
Through multiple on-site verification, quick-fried 95% or more the heap width calculation formula accuracy rate, amplitude of variation deviation+50cm with
It is interior.
2) when staying quarrel, h1The Ratio control of/W, by a large amount of field tests, it is quick-fried to have obtained single blasthole 0.45~0.77
Quick-fried heap width L when broken0With h1The relation equation of/(W+S), L0=-14.469+41.958 [h/ (W+S)], as shown in Figure 4
The quick-fried heap width L of single row of holes explosion when staying quarrel0With h1The relational graph of/(W+S).
When more Hole placing blasts, quick-fried heap width Li=-14.469+41.958 [h1/(W+S)]+(N-1)×5.5
Through multiple on-site verification, quick-fried 96% or more the heap width calculation formula accuracy rate, amplitude of variation deviation+45cm with
It is interior.
By controlling the quick-fried heap width of bench blasting, berm width is controlled within 8m, and slope of stope angle improves 4.3 °, in fact
Show steep wall mining, it is annual to reduce 2,300,000 tons of rock amount of removing or more, achieve significant economic benefit.
Claims (2)
1. a kind of method of the quick-fried heap width of optimal control surface mine bench blasting, it is characterised in that realized by following steps:
1) according to the blasting parameter of design: aperture, pitch-row, hole depth, charge constitution, in surface mine production step (1)
Arrange front-seat blasthole (2), blasthole (2) quantity is controlled according to field condition in 3~5 ranges；Front-seat blasthole (2) and bench slope
(7) width of bottom is toe burden width W；When staying quarrel, the quick-fried heap width in scope of freedom direction is in front of production step (1)
Stay quarrel thickness S；
2) according to the explosive payload of design, explosive is packed into blast hole projectile filling section (3), blast hole projectile filling section (3) in front-seat blasthole (2)
Height be h1；It is blocked in multiple-row blasting section (4), the height h of strict control multiple-row blasting section (4)2And blocking is closely knit
Degree；Then blasting circuit is connected, is detonated after errorless on inspection；
3) the quick-fried heap width after explosion, using rangefinder, steel tape or other dimensional measuring instruments, after measuring explosion；
4) according to above-mentioned steps, for different lithology, quarrel two schemes are cut and are stayed clearly, carry out 15~35 live explosion bulge tests,
Improve the reliability of experimental data；
5) the quick-fried heap width data by step 3), 4) measured is returned quick-fried when obtaining single row of holes explosion using regression analysis
Heap width L0Respectively with clear quarrel variable h1/ W and stay quarrel variable h1The regression equation of/(W+S):
When clear quarrel: L0=A1+B1·(h1/ W), wherein A1And B1To return numerical value；
When staying quarrel: L0=A2+B2·[h1/ (W+S)], wherein A2And B2To return numerical value；
L0Quick-fried heap width when single shot hole blasting, the unit of each parameter is rice in formula；
6) the width L of quick-fried heap (5) is determined according to each blasting hole number of rows N and blasthole array pitch b using multiple rows of shot hole blasting againi
Calculation formula:
When clear quarrel: Li=A1+B1·(h1/W)+(N-1)×b；
When staying quarrel: Li=A2+B2·[h1/(W+S)]+(N-1)×b；
In formula: LiQuick-fried heap width when multiple rows of shot hole blasting, N- blasthole number of rows, the unit of other each parameters are rice；
7) the live explosion bulge test for carrying out different blasthole number of rows N, measures actual quick-fried heap width L, carries out with formula calculated result
Comparison, verifies the accuracy of calculation formula；
8) calculation formula according to the quick-fried heap width L of the quick-fried heap (5) obtained, changes further according to field condition, predicts other steps
The quick-fried heap width of explosion instructs the adjustment of blasting parameter, direction of detonating, guarantees shotfiring safety, avoid being flushed to following platform under quick-fried heap
Rank improves shovel dress efficiency.
2. the method for the quick-fried heap width of optimal control surface mine bench blasting as described in claim 1, it is characterised in that: in step
In rapid single blasthole scene explosion bulge test 2), the quick-fried heap width L that is measured using 22~30 field tests0Data are returned
Analysis.
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| CN110806155A (en) * | 2019-10-18 | 2020-02-18 | 甘肃酒钢集团宏兴钢铁股份有限公司 | Method for optimizing explosive distribution |
| CN110823028A (en) * | 2019-11-21 | 2020-02-21 | 张�杰 | Method for optimally controlling bench blasting width of surface mine |
| CN111426246A (en) * | 2020-03-30 | 2020-07-17 | 南阳市神威爆破工程有限公司 | Ore slope blasting optimization method |
| CN114741906A (en) * | 2022-06-15 | 2022-07-12 | 矿冶科技集团有限公司 | Method for calculating annular blast hole blasting parameters |
| CN115479512A (en) * | 2022-09-20 | 2022-12-16 | 中煤科工集团沈阳研究院有限公司 | Intelligent drilling and blasting pile block rate optimization method for strip mine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115479512A (en) * | 2022-09-20 | 2022-12-16 | 中煤科工集团沈阳研究院有限公司 | Intelligent drilling and blasting pile block rate optimization method for strip mine |
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