CN108412495A - A kind of excavating plant bench blasting method - Google Patents
A kind of excavating plant bench blasting method Download PDFInfo
- Publication number
- CN108412495A CN108412495A CN201810089865.8A CN201810089865A CN108412495A CN 108412495 A CN108412495 A CN 108412495A CN 201810089865 A CN201810089865 A CN 201810089865A CN 108412495 A CN108412495 A CN 108412495A
- Authority
- CN
- China
- Prior art keywords
- ceasma
- blast hole
- hole
- explosive
- formula
- 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 39
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002360 explosive Substances 0.000 claims abstract description 73
- 238000004880 explosion Methods 0.000 claims abstract description 48
- 239000011435 rock Substances 0.000 claims abstract description 48
- 239000000843 powder Substances 0.000 claims abstract description 30
- 230000000694 effects Effects 0.000 claims abstract description 28
- 238000005553 drilling Methods 0.000 claims abstract description 22
- 238000011068 loading method Methods 0.000 claims abstract description 18
- 238000010276 construction Methods 0.000 claims abstract description 11
- 238000007600 charging Methods 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 9
- 238000005474 detonation Methods 0.000 claims description 8
- 239000003814 drug Substances 0.000 claims description 5
- 239000001828 Gelatine Substances 0.000 claims description 3
- SNIOPGDIGTZGOP-UHFFFAOYSA-N Nitroglycerin Chemical compound [O-][N+](=O)OCC(O[N+]([O-])=O)CO[N+]([O-])=O SNIOPGDIGTZGOP-UHFFFAOYSA-N 0.000 claims description 3
- 239000003818 cinder Substances 0.000 claims description 3
- 229940079593 drug Drugs 0.000 claims description 3
- 229920000159 gelatin Polymers 0.000 claims description 3
- 235000019322 gelatine Nutrition 0.000 claims description 3
- 229960003711 glyceryl trinitrate Drugs 0.000 claims description 3
- 238000000611 regression analysis Methods 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 description 8
- 241000196324 Embryophyta Species 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 235000019738 Limestone Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 244000089409 Erythrina poeppigiana Species 0.000 description 1
- 235000009776 Rathbunia alamosensis Nutrition 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/26—Methods of surface mining; Layouts therefor
- E21C41/30—Methods of surface mining; Layouts therefor for ores, e.g. mining placers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The present invention relates to a kind of excavating plant bench blasting methods, punch at least three groups straight down on step square position, respectively pre- ceasma, main blast hole, blast hole.Wherein blast hole spaced loading, explosive payload from top to bottom increase successively as needed.The also spaced loading of pre- ceasma, explosive payload are from top to bottom sequentially reduced.Main blast hole whole powder charge.Detonate pre- ceasma first, and pre- ceasma detonates after 50 120ms, and detonate main blast hole and blast hole, interval of delta t successively between main blast hole and each hole of blast hole.Achieve the effect that direct explosion goes out ideal bench face.The present invention uses vertical drilling, and construction is relatively simple, of less demanding to drilling machine；Powder charge process uses spaced loading, and the demolition effect that can efficiently use each section forms ideal bank slope, reduces later stage rock overburden amount；First detonate pre- ceasma on blasting time, to form pre- broken face, uses short-delay blasting between remaining blasthole row, hole, rationally to utilize explosive energy, reaches best demolition effect.
Description
Technical field
The present invention relates to explosion fields, more particularly to a kind of excavating plant bench blasting method.
Background technology
In the recovery process of opencut, the expense for removing rock is larger.The increase of bank slope can effectively reduce rock
Stone overburden amount increases economic benefit.Therefore it needs to increase bank slope as far as possible under the premise of ensureing that step is stablized.
Each stage it is stepped at process predominantly punch, powder charge, detonating charge removes extra sillar.It selects rational
Drilling, powder charge, detonation way can reach preferable demolition effect, form ideal slope angle, reduce later stage rock overburden amount, increase
Big economic benefit.The charge constitution used at present is mainly continuous charging, or is carried out according to different depth rock blastability difference
Spaced loading, drilling form have vertical hole and angling hole.
(1) vertical drilling is i.e. perpendicular to step square position face, straight down drilling.The advantages of the method, which is to drill, to be formed
Drilling machine is only by power straight down in the process, and without the component in other directions, construction is easier to.But according to existing charge constitution,
The explosion coverage of vertical drilling remains perpendicular to step square position face.Therefore it can not both take into account explosion and the explosive of toe burden
Efficiently use, and ideal pre- broken face can not be formed after explosion.
(2) inclined drill i.e. with step square position face drilling diagonally downward at an angle.The method can take into account chassis and support
The explosion of anti-line and efficiently using for explosive can also form certain bank slope after explosion.But inclined drill is being formed
Drilling machine will not only undertake power straight down in the process, also resist the component generated by the angle between drilling machine and vertical direction,
Therefore causing stability of the drilling machine in boring procedure poor, difficulty of construction increases, and construction cost is also higher.
Invention content
The problem to be solved in the present invention be under the premise of ensureing air bench blasting final effect using vertical drilling into
Row explosion reduces difficulty of construction with this, saves construction cost；The present invention in conjunction with vertical drilling by being easy to construct, inclined drill
The advantages of explosive energy can be efficiently used, be easily formed angled bank slope, provides a kind of excavating plant bench blasting
Method.
Technical solution of the invention is：A kind of excavating plant bench blasting method is determined by construction site first
Step height H, bank slope α, determine required pitch-row a, array pitch b, single hole explosive payload Q, main blast hole (3) and blast hole
(4) hole depth H1, the blasting parameter of Interval Time In Millisecond Blasting Δ t；At least three groups are punched straight down on step (1) square position,
The blast hole (4) of main blast hole (3), bench face side respectively between the pre- ceasma (2) of the pre- broken face side of step, two rows,
If step width is excessive, increasing main blast hole (3) number of rows on the basis of array pitch b, pre- ceasma (2) and blast hole (4) number of rows are constant,
Pre- ceasma (2) hole depth is consistent with step height H, main blast hole (3) and blast hole (4) hole depth H1Than step height depth, borehole blasting
Hole (4) spaced loading, explosive payload from top to bottom increase successively, and pre- ceasma (2) also spaced loading, explosive payload from top to bottom subtracts successively
Small, the whole powder charges of main blast hole (3), detonate pre- ceasma (2) first, and after pre- ceasma (2) detonation 50-120ms, detonate main blast hole (3)
With blast hole (4), interval time Δ t successively between main blast hole (3) and blast hole (4) each hole reaches direct explosion and goes out ideal step
The effect of slope surface.
The height of step (1) is H, bank slope α, then each parameter determination method of explosion is as follows：
Toe burden：
W1≤H cotα+c
In formula, W1For toe burden, m；H is step height, m；α is bank slope, generally 60 °~70 °；C is
Safe distance from deep hole center to top of the slope sideline, c >=2.5~3m；
Pre- ceasma (2) hole depth is consistent with step height H, and main blast hole (3), blast hole (4) hole depth are H1
H1=H+h
H=(0.15~0.35) W1
H is outdrill value, m in formula；
Pitch of holes is a, and row's spacing is b,
A=mW1
B=nW1
In formula, m is blasthole close coefficient, wherein m=0.8~1.4；N is array pitch related coefficient, wherein；N=0.6~
0.8；
Single hole explosive payload is Q：
Q=kqabH
K is to consider that the explosive payload of each round rock slag drag effect in front increases coefficient, generally takes 1.1~1.2；Q is unit
Explosive consumption, kg/m3；
R is rock coefficient in formula；F is blasthole gradient, and vertical hole takes 1；S is that unit explosive calculates power；
S be unit explosive calculate power, be with the unit explosive blasting ability of 35% nitroglycerine gelatine explosive be calculate
Power S=1 is standard, is calculated according to the following formula；
In formula, E is unit explosive blasting ability；A is the Explosive Energy of unit explosive, i.e., quick-fried heat, j/kg；
B is unit explosive detonation gas volume, i.e. specific volume, l/kg；
R is rock coefficient, is determined through regression analysis according to the various ROCK CONDITIONSs in each mine and explosive specific charge
F is the hard coefficient of rock in formula；γ is the force density of rock, g/cm3；Selection typical standard basement rock (f=10,
γ=2.65g/cm3) standard as rock coefficient R=1；
Joint above formula can obtain
Relational expression between single hole explosive payload and the hard coefficient of unit weight, rock, pitch-row, array pitch, step height
Relational expression between single hole explosive payload and the hard coefficient of unit weight, rock, step height, bank slope
For pre- ceasma (2), powder charge is located at top bottleneck area (5) lower end, brill using point three sections of spaced loadings, pack
Powder charge area (8), hole bottom powder charge area (10) in the middle part of hole since every section of cartridge length is less than 20 times of bore diameter, therefore can wait
It imitates in spheroidal charging, then its demolition effect is equivalent to the demolition effect superposition of three spheroidal chargings, three packs of upper, middle and lower etc.
Imitate explosion range；
First determine the explosion range of bottom pack；Due to bottom pack explosion radius r1It is formed by round relaxation zone
Should with get out of a predicament or an embarrassing situation plane and pre- broken face it is tangent, to keep demolition effect best, later stage rock overburden amount is minimum, should ensure explosion model
So that non-area of explosion S' is reached minimum under the premise of enclosing, can be obtained according to area formula
W in formula2For pre- ceasma and pre- broken face minimum horizontal distance, m；
Above formula is solved, when S' minimums,
In formula, r1For the pre- ceasma lower part pack explosion radius of influence；
Middle part pack explosion center is equivalent to drilling middle part, then
R in formula2The pack explosion radius of influence in the middle part of pre- ceasma；
Top pack explosion center is equivalent to bottleneck area lower end, then
r3=[(H-H2)cotα+w2]sinα
R in formula3The pre- ceasma top pack explosion radius of influence；H2For stemming length, m；
Explosive payload and the relational expression of relaxation zone radius are
For relaxation zone radius factor, K is generally taken3=0.5~1.5,
Then three sections of explosive payloads of pre- ceasma are respectively
The ratio between the explosive payload of each pack can refer to the ratio between equivalent explosion radius, therefore can determine that spaced loading is respectively segmented by this
Explosive payload.
Interval Time In Millisecond Blasting is Δ t
In formula, W0For practical burden, m is toe burden W under scarfing cinder blasting condition1, under the conditions of pressing slag, it is
Toe burden with pressure slag convert into burden and；F' is the Protodyakonov coefficient of ore-rock.
The present invention uses vertical drilling, and construction is relatively simple, of less demanding to drilling machine；Powder charge process is filled using interval
Medicine, the demolition effect that can efficiently use each section form ideal bank slope, reduce later stage rock overburden amount；On blasting time
First detonate pre- ceasma, to form pre- broken face, uses short-delay blasting between remaining blasthole row, hole, rationally to utilize explosive energy, reaches
Best demolition effect.
Description of the drawings
Fig. 1 is blasthole position and charging means sectional view in step；
Fig. 2 is that each pack demolition effect of pre- ceasma is superimposed schematic diagram；
Fig. 3 is calculation of blasting parameter schematic diagram；
Fig. 4 is that pre- ceasma demolition effect is superimposed schematic top plan view；
Fig. 5 is blasthole position vertical view on step.
In figure label for：Step 1, pre- ceasma 2, main blast hole 3, blast hole 4, top bottleneck area 5, top powder charge area 6, top
Spacer region 7, middle part powder charge area 8, lower part spacer region 9, lower part powder charge area 10, pre- broken face 11, bench face 12, pre- ceasma top medicine
Packet explosion coverage 13, pre- ceasma middle part pack explosion coverage 14, pre- ceasma lower part pack explosion coverage 15.
Specific implementation mode
This method is furtherd elucidate below in conjunction with the accompanying drawings.
The present invention is a kind of excavating plant bench blasting method, and this method is to be reduced on the basis of form of construction work is simple
Rock overburden amount after explosion, the pattern of reasonable design, charging means and blasting time.First, it is determined by construction site
Step height H, bank slope α, determine required pitch-row a, array pitch b, single hole explosive payload Q, 4 hole of main blast hole 3 and blast hole
Deep H1, the blasting parameter of Interval Time In Millisecond Blasting Δ t；Beat at least three groups of vertical perforating straight down on 1 square position of step, point
Not Wei the pre- broken face side of step pre- ceasma 2, it is two rows of between main blast hole 3, bench face side blast hole 4, if step is wide
Spend big, then increase by 3 number of rows of main blast hole on the basis of array pitch b, pre- ceasma 2 and 4 number of rows of blast hole are constant, 2 hole depth of pre- ceasma with
Step height H is consistent, 4 hole depth H of main blast hole 3 and blast hole1Than step height depth, wherein 4 spaced loading of blast hole, explosive payload by
Increase successively under, the also spaced loading of pre- ceasma 2, explosive payload is from top to bottom sequentially reduced, the whole powder charges of main blast hole 3, first
Detonate pre- ceasma 2, and after pre- ceasma (2) detonation 50-120ms, detonate main blast hole 3 and blast hole 4,4 each hole of main blast hole 3 and blast hole
Between interval time Δ t successively, achieve the effect that direct explosion goes out ideal bench face.
Every blasting parameter is determined first；If the height H of step 1 is 12m, bank slope α is 70 °, then explosion is respectively joined
Number determines that method is as follows：
According to bore operation safety condition, it is known that step height and bank slope can acquire toe burden
W1≤Hcotα+c
In formula, W1For toe burden, m；H is step height, m；α is bank slope, generally 60 °~70 °；C is
Safe distance from deep hole center to top of the slope sideline, c >=2.5~3；
It is 3m to take c, then W1≤8.4m；
Pre- ceasma hole depth is consistent with step height H, and main blast hole 3,4 hole depth of blast hole are H1
H1=H+h
H=(0.15~0.35) W1
H is outdrill value, m in formula；
Take h=0.2W1, then H1≈1.67m；
Pitch of holes is a, and row's spacing is b.
A=mW1
B=nW1
In formula, m is blasthole close coefficient, takes m=0.8~1.4；N is array pitch related coefficient, takes n=0.6~0.8；
Take m=1.0, n=0.6；
Then a ≈ 8.4m, b ≈ 5.0m；
Single hole explosive payload is Q
Q=kqabH
K is to consider that the explosive payload of each round rock slag drag effect in front increases coefficient, generally takes 1.1~1.2；Q is unit
Explosive consumption, kg/m3；
R is rock coefficient in formula；F is blasthole gradient, and vertical hole takes 1；S is that unit explosive calculates power；
S be unit explosive calculate power, be with the unit explosive blasting ability of 35% nitroglycerine gelatine explosive be calculate
Power S=1 is standard, is calculated according to the following formula；
In formula, E is unit explosive blasting ability；A is the Explosive Energy of unit explosive, i.e., quick-fried heat, j/kg；B is unit explosive
Detonation gas volume, i.e. specific volume, l/kg；
R is rock coefficient, is determined through regression analysis according to the various ROCK CONDITIONSs in each mine and explosive specific charge
F is the hard coefficient of rock in formula；γ is the force density of rock, g/cm3；Selection typical standard basement rock (f=10,
γ=2.65g/cm3) standard as rock coefficient R=1；
Take limestone rock stratum Polodyakonov coefficient coefficient f=8~10, unit weight γ=2.7g/cm3；
Rock coefficient R=0.846~1.011 can be then calculated, mine uses ammonium nitrate-fuel oil mixture explosion, unit explosive to calculate prestige
Power is S=0.81, F=sina=sin70 ° of blasthole gradient=0.94,；
It substitutes intoObtain q=0.393~0.469kg；
Coefficient of volumetric expansion k=1.6 is taken, by H, a, b is substituted into respectively, is calculated
198~236kg of Q=kqabH ≈；
Joint above formula can obtain
Relational expression between single hole explosive payload and the hard coefficient of unit weight, rock, pitch-row, array pitch, step height
Relational expression between single hole explosive payload and the hard coefficient of unit weight, rock, step height, bank slope
For pre- ceasma 2, powder charge using point three sections of spaced loading scheme, pack be located at 5 lower end of top bottleneck area,
Drilling middle part powder charge area 8, hole bottom powder charge area 10, since every section of cartridge length is less than 20 times of bore diameter, therefore can be equivalent
In spheroidal charging, then its demolition effect is equivalent to the demolition effect superposition of three spheroidal chargings, three packs of upper, middle and lower it is equivalent
Explosion range；
First determine the explosion range of bottom pack；It is answered since bottom pack explosion radius is formed by round relaxation zone
Tangent with baseline (plane of getting out of a predicament or an embarrassing situation) and pre- broken face, to keep demolition effect best, later stage rock overburden amount is minimum, should be quick-fried in guarantee
So that non-area of explosion S' is reached minimum under the premise of broken range, can be obtained according to area formula
W in formula2For pre- ceasma and pre- broken face minimum horizontal distance, m；
Above formula is solved, when S' minimums,
In formula, r1For the pre- ceasma lower part pack explosion radius of influence；
Middle part pack explosion center is equivalent to drilling middle part, then
R in formula2The pack explosion radius of influence in the middle part of pre- ceasma；
Top pack explosion center is equivalent to bottleneck area lower end, then
r3=[(H-H2)cotα+w2]sinα
R in formula3The pre- ceasma top pack explosion radius of influence；H2For stemming length, m；
Explosive payload and the relational expression of relaxation zone radius are
K3For relaxation zone radius factor, K is generally taken3=0.5~1.5,
Then three sections of explosive payloads of pre- ceasma are respectively
K is taken in above formula3=1.5, H=12m, α=70 °, H2=2.5m, W2=4m；
It can then calculate separately out
m1=10.78
m2=102.23
m3=209.78
The ratio between the explosive payload of each pack can refer to the ratio between equivalent explosion radius, therefore can determine that spaced loading is respectively segmented by this
Explosive payload；
To make the demolition effect of adjacent pre- ceasma be superimposed, pre- ceasma pitch-row a should be not more than r1, can use
A=mW1
Interval Time In Millisecond Blasting is Δ t
In formula, W0For practical burden, m is toe burden W under scarfing cinder blasting condition1, under the conditions of pressing slag, it is
Toe burden with pressure slag convert into burden and；F' is the Protodyakonov coefficient of ore-rock；
By W1=8.4 substitute into, and take limestone rock stratum Polodyakonov coefficient coefficient F'=8~10；
Then calculate Δ t=16.8~42ms；
Protodyakonov coefficient table is as follows：
The capacity usage ratio of explosive can be reached maximum by rational stemming length.Stemming length is too short, detonation gas wink
Between will go out blasthole, so that the demolition effect of rock is declined；Stemming length is long, can reduce dose, influence demolition effect.Root
According to existing experience, stemming length generally uses 2.5~3.5m.
Such as figure, a kind of excavating plant bench blasting blasthole structure, including explosion step 1, pre- ceasma 2, main blast hole 3, explosion
4 three groups of hole blasthole；Pre- ceasma 2 and 4 structure of blast hole include top bottleneck area 5, top powder charge area 6, top spacer region 7, in
Powder charge area of portion 8, lower part spacer region 9, lower part powder charge area 10；3 structure of main blast hole includes top bottleneck area 5, powder charge area 11；Pre- ceasma
2 are located at pre- broken face side, and depth is identical as step height, and blast hole 4 is located at bench face side, and main blast hole 3 is located at pre- ceasma 2
Between blast hole 4.
Such as figure, 2 hole depth H of pre- ceasma, using spaced loading structure, 5 height 2.5-3.5m of top bottleneck area, top powder charge area
6 doses are the 45%-55% of single hole total charge, and top spacer region 7 is using headblock interval, height 1-1.5m, middle part powder charge area 8
Dose is the 25%-35% of single hole total charge, and lower part spacer region 9 also uses headblock interval, height 0.6-1m, lower part powder charge area
10 doses are the 15%-25% of single hole total charge.
Such as figure, 3 hole depth H of main blast hole1, using continuous charging structure, 5 height 2.5-3.5m of top bottleneck area, powder charge area 11
Height 7.5-9.5m.
Such as figure, 4 hole depth H of blast hole1, using spaced loading structure, 5 height 2.5-3.5m of top bottleneck area, top powder charge
6 dose of area is the 15%-25% of single hole total charge, and top spacer region 7 is using headblock interval, height 0.6-1m, middle part powder charge
8 dose of area is the 25%-35% of single hole total charge, and lower part spacer region 9 also uses headblock interval, height 1-1.5m, lower part dress
10 dose of medicine area is the 45%-55% of single hole total charge.
Present invention incorporates vertical drillings to be easy to construct, and inclined drill can efficiently use explosive energy, be easily formed in angle
The advantages of bank slope of degree；Spaced loading is used in blast hole 4 and pre- ceasma 2, the explosion effect of each section can be efficiently used
Fruit shape reduces later stage rock overburden amount at ideal bank slope；Detonate pre- ceasma 2 first on blasting time, and pre- ceasma 2 detonates
After 50-120ms, detonate main blast hole 3 and blast hole 4, and interval of delta t successively between 4 each hole of main blast hole 3 and blast hole makes explosive energy
Utilization rate maximizes.
Claims (4)
1. a kind of excavating plant bench blasting method, it is characterised in that：First, the step height H determined by construction site, platform
Rank slope angle α determines required pitch-row a, array pitch b, single hole explosive payload Q, main blast hole (3) and blast hole (4) hole depth H1, elementary errors is quick-fried
The blasting parameter of broken interval time Δ t；Punch at least three groups, the respectively pre- broken face of step straight down on step (1) square position
The pre- ceasma (2) of side, it is two rows of between main blast hole (3), bench face side blast hole (4), if step width is excessive,
Increase main blast hole (3) number of rows on the basis of array pitch b, pre- ceasma (2) and blast hole (4) number of rows are constant, pre- ceasma (2) hole depth and platform
Rank height H is consistent, main blast hole (3) and blast hole (4) hole depth H1Than step height depth, wherein blast hole (4) spaced loading, powder charge
Amount from top to bottom increases successively, and pre- ceasma (2) also spaced loading, explosive payload is from top to bottom sequentially reduced, and main blast hole (3) all fills
Medicine, detonate pre- ceasma (2) first, and after pre- ceasma (2) detonation 50-120ms, detonate main blast hole (3) and blast hole (4), main blast hole
(3) the interval time Δ t successively between blast hole (4) each hole, achievees the effect that direct explosion goes out ideal bench face.
2. a kind of excavating plant bench blasting method as described in claim 1, it is characterised in that：The height of step (1) is H,
Bank slope is α, then each parameter determination method of explosion is as follows：
Toe burden：
W1≤H cot α+c
In formula, W1For toe burden, m；H is step height, m；α is bank slope, generally 60 °~70 °；C is blast hole
(4) center to the safe distance in top of the slope sideline, c >=2.5~3m；
Pre- ceasma (2) hole depth is consistent with step height H, and main blast hole (3), blast hole (4) hole depth are H1
H1=H+h
H=(0.15~0.35) W1
H is outdrill value, m in formula；
Pitch of holes is a, and row's spacing is b,
A=mW1
B=nW1
In formula, m is blasthole close coefficient, takes m=0.8~1.4；N is array pitch related coefficient, takes n=0.6~0.8；
The porose single hole explosive payload of institute is Q：
Q=kqabH
K is to consider that the explosive payload of each round rock slag drag effect in front increases coefficient, generally takes 1.1~1.2；Q is unit explosive
Consumption, kg/m3；
R is rock coefficient in formula；F is blasthole gradient, and vertical hole takes 1；S is that unit explosive calculates power；
S is that unit explosive calculates power, be with the unit explosive blasting ability of 35% nitroglycerine gelatine explosive is to calculate power S
=1 is standard, is calculated according to the following formula；
In formula, E is unit explosive blasting ability；A is the Explosive Energy of unit explosive, i.e., quick-fried heat, j/kg；
B is unit explosive detonation gas volume, i.e. specific volume, l/kg；
R is rock coefficient, is determined through regression analysis according to the various ROCK CONDITIONSs in each mine and explosive specific charge
F is the hard coefficient of rock in formula；γ is the force density of rock, g/cm3；Selection typical standard basement rock (f=10, γ=
2.65g/cm3) standard as rock coefficient R=1；
Joint above formula can obtain
Relational expression between single hole explosive payload and the hard coefficient of unit weight, rock, pitch-row, array pitch, step height
Relational expression between single hole explosive payload and the hard coefficient of unit weight, rock, step height, bank slope
。
3. a kind of excavating plant bench blasting method as described in claim 1, it is characterised in that：For pre- ceasma (2), powder charge
Using point three sections of spaced loadings, pack is located at top bottleneck area (5) lower end, drilling middle part powder charge area (8), hole bottom dress
Medicine area (10) since every section of cartridge length is less than 20 times of bore diameter, therefore can be equivalent to spheroidal charging, then its demolition effect etc.
Imitate the demolition effect superposition in three spheroidal chargings, the equivalent explosion range of three packs of upper, middle and lower；
First determine the explosion range of bottom pack；Due to bottom pack explosion radius r1Being formed by round relaxation zone should be with
Plane of getting out of a predicament or an embarrassing situation and pre- broken face are tangent, and to keep demolition effect best, later stage rock overburden amount is minimum, should ensure explosion range
Under the premise of so that non-area of explosion S' is reached minimum, can be obtained according to area formula
W in formula2For pre- ceasma and pre- broken face minimum horizontal distance, m；
Above formula is solved, when S' minimums,
In formula, r1For the pre- ceasma lower part pack explosion radius of influence；
Middle part pack explosion center is equivalent to drilling middle part, then
R in formula2The pack explosion radius of influence in the middle part of pre- ceasma；
Top pack explosion center is equivalent to bottleneck area lower end, then
r3=[(H-H2)cotα+w2]sinα
R in formula3The pre- ceasma top pack explosion radius of influence；H2For stemming length, m；
Explosive payload and the relational expression of relaxation zone radius are
K3For relaxation zone radius factor, K is generally taken3=0.5~1.5,
Then three sections of explosive payloads of pre- ceasma are respectively
The ratio between the explosive payload of each pack can refer to the ratio between equivalent explosion radius, therefore can determine by this each every powder charge among pre- ceasma
It is segmented the explosive payload of pack.
4. a kind of excavating plant bench blasting method as described in claim 1, it is characterised in that：Interval Time In Millisecond Blasting is
Δt
In formula, W0For practical burden, m is toe burden W under scarfing cinder blasting condition1, it is chassis under the conditions of pressing slag
Burden with pressure slag convert into burden and；F' is the Protodyakonov coefficient of ore-rock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810089865.8A CN108412495A (en) | 2018-01-30 | 2018-01-30 | A kind of excavating plant bench blasting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810089865.8A CN108412495A (en) | 2018-01-30 | 2018-01-30 | A kind of excavating plant bench blasting method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108412495A true CN108412495A (en) | 2018-08-17 |
Family
ID=63126555
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810089865.8A Pending CN108412495A (en) | 2018-01-30 | 2018-01-30 | A kind of excavating plant bench blasting method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108412495A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708549A (en) * | 2019-02-20 | 2019-05-03 | 中国水利水电第八工程局有限公司 | The automatic adjusting method of the drill-and-blast method of gradating material |
| CN112254593A (en) * | 2020-10-19 | 2021-01-22 | 本钢板材股份有限公司 | Step slag-cleaning blasting method |
| CN112747644A (en) * | 2021-03-03 | 2021-05-04 | 新疆工程学院 | Blasting method for reducing rock chunks of strip mine |
| CN114705094A (en) * | 2022-03-27 | 2022-07-05 | 甘肃西沟矿业有限公司 | Combined charging structure for improving medium-length hole blasting effect of limestone strip mine |
| CN114705092A (en) * | 2022-03-09 | 2022-07-05 | 车兆学 | Method for uniformly positioning and continuously distributing ground coordinates for strip mine bench blasting drilling |
| CN115451764A (en) * | 2022-09-23 | 2022-12-09 | 河北钢铁集团矿业有限公司 | Open blasting method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101424503A (en) * | 2007-11-01 | 2009-05-06 | 鞍钢集团矿业公司 | Rim angle excavation method by blasting for natural side hill |
| CN102733808A (en) * | 2012-07-09 | 2012-10-17 | 薛世忠 | Closed pit open-pit mine ore recovery method |
| CN105571419A (en) * | 2016-01-28 | 2016-05-11 | 中钢集团马鞍山矿山研究院有限公司 | Blasting method capable of effectively reducing blasting boulder yield of surface mine |
-
2018
- 2018-01-30 CN CN201810089865.8A patent/CN108412495A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101424503A (en) * | 2007-11-01 | 2009-05-06 | 鞍钢集团矿业公司 | Rim angle excavation method by blasting for natural side hill |
| CN102733808A (en) * | 2012-07-09 | 2012-10-17 | 薛世忠 | Closed pit open-pit mine ore recovery method |
| CN105571419A (en) * | 2016-01-28 | 2016-05-11 | 中钢集团马鞍山矿山研究院有限公司 | Blasting method capable of effectively reducing blasting boulder yield of surface mine |
Non-Patent Citations (2)
| Title |
|---|
| 唐小军等: "预裂爆破在紫金山金铜矿高陡边坡的应用", 《爆破》 * |
| 师强强等: "露天采场靠界边坡控制爆破技术实践", 《现代矿业》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708549A (en) * | 2019-02-20 | 2019-05-03 | 中国水利水电第八工程局有限公司 | The automatic adjusting method of the drill-and-blast method of gradating material |
| CN109708549B (en) * | 2019-02-20 | 2021-03-16 | 中国水利水电第八工程局有限公司 | Automatic adjustment method for drilling and blasting parameters of graded ingredients |
| CN112254593A (en) * | 2020-10-19 | 2021-01-22 | 本钢板材股份有限公司 | Step slag-cleaning blasting method |
| CN112254593B (en) * | 2020-10-19 | 2023-02-03 | 本钢板材股份有限公司 | Step slag-cleaning blasting method |
| CN112747644A (en) * | 2021-03-03 | 2021-05-04 | 新疆工程学院 | Blasting method for reducing rock chunks of strip mine |
| CN114705092A (en) * | 2022-03-09 | 2022-07-05 | 车兆学 | Method for uniformly positioning and continuously distributing ground coordinates for strip mine bench blasting drilling |
| CN114705094A (en) * | 2022-03-27 | 2022-07-05 | 甘肃西沟矿业有限公司 | Combined charging structure for improving medium-length hole blasting effect of limestone strip mine |
| CN115451764A (en) * | 2022-09-23 | 2022-12-09 | 河北钢铁集团矿业有限公司 | Open blasting method |
| CN115451764B (en) * | 2022-09-23 | 2023-08-22 | 河北钢铁集团矿业有限公司 | Surface blasting method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108412495A (en) | A kind of excavating plant bench blasting method | |
| CN104405395B (en) | Mining method for transition of underground ore body from open stope mining method to caving mining method | |
| CN105781560B (en) | A kind of construction method of the remote base tunnel look-ahead explosion in super low coverage superimposing thread tunnel | |
| CN103696769B (en) | Upward shrinkage spaced charging fractional blasting slot-drawing method | |
| CN101738148B (en) | Tunnel medium-length hole smooth blasting method | |
| CN107165636B (en) | A kind of method of strip pit exploitation | |
| CN108643910A (en) | A method of controlling caving for coal mine stope tight roof Advance presplitting | |
| CN107503751A (en) | A kind of strip pit ore drawing chute and strip pit recovery method | |
| CN109631698A (en) | A kind of space interval charge explosion method reducing boulder yield | |
| CN108661642A (en) | A kind of method of the nearly upright Bumping Pressure in Coal Layers of depth hole relieving shot prevention | |
| CN108005653A (en) | A kind of high stratification mechanization raise mining method | |
| CN112943262A (en) | Karst landform tunnel energy-gathering water pressure smooth blasting structure and method | |
| CN104807381B (en) | Method for forming cutting surface in deep hole blasting | |
| CN111551084A (en) | Deep hole blasting coal breakage method for large-dip-angle coal seam | |
| CN110500926A (en) | A kind of deep hole blasting spaced loading method | |
| CN107560508A (en) | A kind of blasting method for being used to cut well simultaneous shaft sin king | |
| CN104879128B (en) | Severe inclined thick coal seam coal winning technology based on the advanced pre- quick-fried reduction of top coal | |
| US4353598A (en) | Method of blasting pillars with vertical blastholes | |
| US4146272A (en) | Explosive placement for explosive expansion toward spaced apart voids | |
| CN207936861U (en) | A kind of excavating plant bench blasting pore structure | |
| CN114060088B (en) | Method for preventing and controlling water damage of separation layer of mine coal seam roof | |
| US4192554A (en) | Method for explosive expansion toward horizontal free faces for forming an in situ oil shale retort | |
| US4360233A (en) | Method of bulking an in situ oil shale retort substantially full of fragmented shale | |
| CN108592716A (en) | A kind of method of underground stope fining blasting excavation | |
| CN108709467A (en) | It is lower that the method that vertical long hole refines explosion is replaced to fan-shaped deep hole |
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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180817 |
|
| WD01 | Invention patent application deemed withdrawn after publication |