CN108166987A - Poly- ore deposit slot cuts a Trenching technology - Google Patents
Poly- ore deposit slot cuts a Trenching technology Download PDFInfo
- Publication number
- CN108166987A CN108166987A CN201810004081.0A CN201810004081A CN108166987A CN 108166987 A CN108166987 A CN 108166987A CN 201810004081 A CN201810004081 A CN 201810004081A CN 108166987 A CN108166987 A CN 108166987A
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- China
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- hole
- macropore
- cut spreader
- row
- cut
- 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.)
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- 238000005516 engineering process Methods 0.000 title claims abstract description 16
- 238000010276 construction Methods 0.000 claims abstract description 28
- 238000004880 explosion Methods 0.000 claims abstract description 21
- 238000005422 blasting Methods 0.000 claims abstract description 13
- 238000005520 cutting process Methods 0.000 claims abstract description 13
- 238000005065 mining Methods 0.000 claims abstract description 7
- 239000004744 fabric Substances 0.000 claims abstract description 4
- 230000003111 delayed effect Effects 0.000 claims description 27
- 230000001934 delay Effects 0.000 claims description 3
- 239000002360 explosive Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 238000000465 moulding Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/007—Drilling by use of explosives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/28—Enlarging drilled holes, e.g. by counterboring
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/10—Making by using boring or cutting machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Earth Drilling (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
Poly- ore deposit slot cuts a Trenching technology, is related to mine mining field, especially a kind of effectively to accelerate poly- ore deposit slot construction speed, raises labour productivity, and the poly- ore deposit slot for reducing production cost cuts a Trenching technology.The poly- ore deposit slot of the present invention cuts a Trenching technology, it is characterized in that the technology is to fan shaped medium length hole on utilizing, using macropore and poly- ore deposit slot tunnel as explosion free space, blast hole is arranged in explosion free space, short-delay blasting is used between hole, cutting funnel is formed after explosion step by step, blast hole cloth hole is using central major aperture and poly- ore deposit slot tunnel as initial free space, it is divided into and expands wellhole and cut spreader hole, it is eight to expand wellhole, macropore surrounding is arranged in, cut spreader hole is three row of upper, middle and lower, and six cut spreader holes are often set on row.The poly- ore deposit slot of the present invention cuts a Trenching technology, easy to implement, easy to operate, and safety coefficient is high, and one-pass molding effect is good, effectively increases poly- ore deposit slot construction speed, and drop is raised labour productivity, low production cost.
Description
Technical field
The present invention relates to mine mining fields, especially a kind of effectively to accelerate poly- ore deposit slot construction speed, improve labour production
Rate, the poly- ore deposit slot for reducing production cost cut a Trenching technology.
Background technology
Poly- ore deposit slot is that ore removal level and the horizontal funnel channel that undercuts are connected in natural caving method mine, molding speed
Can degree, Forming Quality etc. are directly related to mine ore removal smoothly carry out, and be a project of primary importance for realizing mining technique,
The work progress of poly- ore deposit slot includes cutting and expanding two steps of slot, and cutting is passed through using macropore and poly- ore deposit slot tunnel as free space
Medium-length hole blasting forms cutting groove, and compensation space is provided for the follow-up slot that expands；Expand slot on the basis of the cutting groove formed to lead to
It crosses tight-face blasting and forms poly- ore deposit slot funnel.China is using the mine for having floor pillar caving mining methods back production generally along manually shallow bore hole
The mode of explosion carries out the cutting construction of poly- ore deposit slot, and which difficulty of construction is big, and efficiency is low, and construction safety is difficult to ensure that.It is and general
Bright copper mine is dug up mine using natural caving method, and look ahead system undercuts, and under the region that undercuted, poly- ore deposit slot is carried out using shallow blasting mode
Construction, construction safety is difficult to ensure that, and shaping speed is slower, and poly- ore deposit Slot shaping speed restricts the fltting speed that undercuts, shadow
Can entire mine be rung on time up to production.
Invention content
Exactly current China to be solved by this invention generally carries out poly- ore deposit slot cutting using artificial shallow blasting mode and applies
Work, difficulty of construction is big, and efficiency is low, the problem of being difficult to ensure that safely, provides one kind and effectively accelerates poly- ore deposit slot construction speed, improve labor
Dynamic productivity, reduces production cost, ensures that the poly- ore deposit slot of construction safety cuts a Trenching technology.
The poly- ore deposit slot of the present invention cuts a Trenching technology, it is characterised in that the technology be on utilizing to fan shaped medium length hole,
Using macropore and poly- ore deposit slot tunnel as explosion free space, blast hole is arranged in explosion free space, short-delay blasting is used between hole,
Cutting funnel is formed after explosion step by step, blast hole cloth hole is divided into using central major aperture and poly- ore deposit slot tunnel as initial free space
Expand wellhole and cut spreader hole, it is eight to expand wellhole, is arranged in macropore surrounding, and cut spreader hole is three row of upper, middle and lower, often sets six on row
A cut spreader hole, wherein：
Eight are expanded wellhole and are divided into J1, J2, J3, J4, J5, J6, J7 and J8, and J1 and J2 are separately positioned on the top and lower section of macropore,
Spacing with big bore edges is the left side and back that 300mm, J3 and J4 are separately positioned on macropore, and the spacing with big bore edges is
400mm；J5, J6, J7 and J8 are separately positioned on upper left, lower-left, bottom right and the upper right of macropore, the company between J5, J6, J7 and J8
Line forms a square, and square midpoint is overlapped with the macropore center of circle, and the length of side of the square is 2000mm；
The upper row of cut spreader hole flushes with the expansion wellhole of upper left and upper right, and the cut spreader hole and the expansion wellhole of lower-left and bottom right of lower row is neat
Flat, the cut spreader hole of middle row is flushed with the macropore center of circle, and often the cut spreader hole on row is symmetrical arranged using the macropore center of circle as center line, the left and right sides
Three are set respectively；
Macropore using Sandvik AB production DU411 macropores trolley construction, be vertical upward hole, hole depth 17025mm, as
Initial compensation space first using φ 165mm drill bit construction guidances hole, then is changed the construction reaming of φ 254mm drill bits, is finally used
V30 drill bits are constructed φ 762mm macropores, and the verticality of macropore is kept in work progress；
Expand wellhole using the mining trolley constructions of Simba 1354, diameter phi 76mm is constructed using the two-shipper heart, movement height
Between 1900mm, hole depth 17457mm ~ 18935mm, lateral opening 75 °, minimum burden W=2500mm, bottom hole pitch 2000mm of angle ~
2500mm, aperture is away from for bottom hole pitch half, being 1000mm ~ 1250mm；
Expand wellhole and explosion, wherein J1 delay 5ms, J2 delay 40ms, J3 delays are carried out using delaying blasting mode with cut spreader hole
75ms, J4 delay 110ms, J5 delay 1200ms, J6 delay 1235ms, J7 delay 1270ms, J8 delay 1305ms；Middle row expands slot
Hole is located at first cut spreader hole delay 3700ms on the left of macropore, and upper row is located at first expansion on the left of macropore with lower row's cut spreader hole
Slot is delayed 3735ms, and middle row's cut spreader hole is located at first cut spreader hole delay 4095ms on the right side of macropore, and upper row expands with lower row
First cut spreader hole that slot is located on the right side of macropore is delayed 4130ms, and middle row's cut spreader hole is located at second expansion slot on the right side of macropore
Hole is delayed 4165ms, and second cut spreader hole that upper row and lower row's cut spreader hole are located on the right side of macropore is delayed 4200ms, middle row's expansion slot
Hole is located at second cut spreader hole delay 4560ms on the left of macropore, and upper row is located at second expansion on the left of macropore with lower row's cut spreader hole
Slot is delayed 4595ms, and middle row's cut spreader hole is located at the third cut spreader hole delay 4630ms on the left of macropore, and upper row expands with lower row
The third cut spreader hole that slot is located on the left of macropore is delayed 4665s, and the third that middle row's cut spreader hole is located on the right side of macropore expands slot
Hole is delayed 5025ms, and first cut spreader hole that upper row and lower row's cut spreader hole are located on the right side of macropore is delayed 5050ms；
Explosive is filled in above-mentioned expansion wellhole and cut spreader hole, explosion is carried out according to delay time, you can onepull grooving.
The poly- ore deposit slot of the present invention cuts a Trenching technology, easy to implement, easy to operate, and safety coefficient is high, one-pass molding
Effect is good, effectively increases poly- ore deposit slot construction speed, and drop is raised labour productivity, and low production cost has further the advantage that：
（1）Simple analysis and summary is carried out to the principle of medium-length hole blasting simultaneous shaft sin king by field practice, it is proposed that delay quick-fried
It is broken, and successfully realize through φ 762mm macropores shaft formatting by one blasting, onepull grooving；
（2）It avoids when elder generation's explosion forms cutting well and re-forms by the way of cutting groove, due to slot raise and undercuting horizontal connect
It is logical, it needs to carry out a large amount of ore removal, and construction personnel needs operation under the slot raise that station is formed in explosion, operating environment is non-
It is often poor, the problem of construction safety cannot ensure；
（3）Poly- ore deposit slot cutting groove onepull grooving, mechanization degree is high compared with traditional grooving mode, reduces back work
Time improves labor productivity, reduces production cost；
（4）Using poly- ore deposit slot cutting groove onepull grooving, the construction speed of poly- ore deposit slot is accelerated, shortens out the preparation of mine mouth
Time provides guarantee up to production on schedule for ore.
Description of the drawings
Fig. 1 is the poly- ore deposit slot tunnel structure schematic diagram of the present invention.
Wherein, macropore 1, cut spreader hole 2 expand wellhole J1, expand wellhole J2, expand wellhole J3, expand wellhole J4, expand wellhole J5, expand well
Hole J6 expands wellhole J7, expands wellhole J8.
Specific embodiment
Embodiment 1：A kind of poly- ore deposit slot cuts a Trenching technology, to fan shaped medium length hole on, with macropore 1 and poly- ore deposit slot
Tunnel is explosion free space, and blast hole is arranged in explosion free space, short-delay blasting is used between hole, is formed after explosion step by step
Funnel is cut, blast hole cloth hole is divided into using central major aperture 1 and poly- ore deposit slot tunnel as initial free space and expands wellhole and cut spreader hole
2, it is eight to expand wellhole, is arranged in 1 surrounding of macropore, and cut spreader hole 2 is three row of upper, middle and lower, and six cut spreader holes 2 are often set on row,
In：
Eight are expanded wellhole and are divided into J1, J2, J3, J4, J5, J6, J7 and J8, and J1 and J2 are separately positioned on the top and lower section of macropore 1,
The left side and back of macropore 1, the spacing with 1 edge of macropore are separately positioned on for 300mm, J3 and J4 with the spacing at 1 edge of macropore
For 400mm；J5, J6, J7 and J8 are separately positioned on upper left, lower-left, bottom right and the upper right of macropore 1, between J5, J6, J7 and J8
Line forms a square, and square midpoint is overlapped with 1 center of circle of macropore, and the length of side of the square is 2000mm；
The upper row of cut spreader hole 2 flushes with the expansion wellhole of upper left and upper right, and the cut spreader hole 2 and the expansion wellhole of lower-left and bottom right of lower row is neat
Flat, the cut spreader hole 2 of middle row is flushed with 1 center of circle of macropore, and often the cut spreader hole 2 on row is symmetrical arranged using 1 center of circle of macropore as center line, left and right
Both sides set three respectively；
Macropore 1 is vertical upward hole, hole depth 17025mm makees using 1 trolley of the DU411 macropores construction of Sandvik AB's production
For initial compensation space, first using φ 165mm drill bit construction guidances hole, then the construction reaming of φ 254mm drill bits is changed, finally used
V30 drill bits construction φ 762mm macropores 1 keep the verticality of macropore 1 in work progress；
Expand wellhole using the mining trolley constructions of Simba 1354, diameter phi 76mm is constructed using the two-shipper heart, movement height
Between 1900mm, hole depth 17457mm ~ 18935mm, lateral opening 75 °, minimum burden W=2500mm, bottom hole pitch 2000mm of angle ~
2500mm, aperture is away from for bottom hole pitch half, being 1000mm ~ 1250mm；
Expand wellhole and explosion, wherein J1 delay 5ms, J2 delay 40ms, J3 delays are carried out using delaying blasting mode with cut spreader hole 2
75ms, J4 delay 110ms, J5 delay 1200ms, J6 delay 1235ms, J7 delay 1270ms, J8 delay 1305ms；Middle row expands slot
Hole 2 is located at first cut spreader hole 2 delay 3700ms in the left side of macropore 1, and upper row and lower row's cut spreader hole 2 are located at the on the left of macropore 1
One cut spreader hole 2 is delayed 3735ms, and middle row's cut spreader hole 2 is located at first cut spreader hole 2 delay 4095ms on 1 right side of macropore, on
First cut spreader hole 2 that row is located at lower row's cut spreader hole 2 on the right side of macropore 1 is delayed 4130ms, and middle row's cut spreader hole 2 is located at macropore 1
Second cut spreader hole 2 delay 4165ms on right side, second cut spreader hole 2 that upper row is located at 1 right side of macropore with lower row's cut spreader hole 2 are equal
Be delayed 4200ms, and middle row's cut spreader hole 2 is located at second cut spreader hole 2 delay 4560ms in 1 left side of macropore, upper row and lower row's cut spreader hole
2 second cut spreader hole 2 for being located at the left side of macropore 1 are delayed 4595ms, and middle row's cut spreader hole 2 is located at the third expansion in 1 left side of macropore
Slot 2 is delayed 4630ms, and the third cut spreader hole 2 that upper row and lower row's cut spreader hole 2 are located on the left of macropore 1 is delayed 4665s, middle row
Cut spreader hole 2 is located at the delay 5025ms of third cut spreader hole 2 on 1 right side of macropore, and upper row is located at 1 right side of macropore with lower row's cut spreader hole 2
First cut spreader hole 2 be delayed 5050ms；
Explosive is filled in above-mentioned expansion wellhole and cut spreader hole 2, explosion is carried out according to delay time, you can onepull grooving.
Claims (1)
1. a kind of poly- ore deposit slot cuts a Trenching technology, it is characterised in that the technology is to fan shaped medium length hole, with macropore on utilizing
（1）And poly- ore deposit slot tunnel is explosion free space, and blast hole is arranged in explosion free space, short-delay blasting is used between hole, by
Cutting funnel is formed after grade explosion, blast hole cloth hole is with central major aperture（1）And poly- drive is divided into expansion well as initial free space
Hole and cut spreader hole（2）, it is eight to expand wellhole, is arranged in macropore（1）Surrounding, cut spreader hole（2）For three row of upper, middle and lower, often set on row
Put six cut spreader holes（2）, wherein：
Eight are expanded wellhole and are divided into J1, J2, J3, J4, J5, J6, J7 and J8, and J1 and J2 are separately positioned on macropore（1）Top under
Side, with macropore（1）The spacing at edge is separately positioned on macropore for 300mm, J3 and J4（1）The left side and back, with macropore（1）Side
The spacing of edge is 400mm；J5, J6, J7 and J8 are separately positioned on macropore（1）Upper left, lower-left, bottom right and upper right, J5, J6, J7
Line between J8 forms a square, square midpoint and macropore（1）The center of circle overlaps, and the length of side of the square is
2000mm；
Cut spreader hole（2）Upper row flushed with the expansion wellhole of upper left and upper right, the cut spreader hole of lower row（2）With the expansion well of lower-left and bottom right
Hole flushes, the cut spreader hole of middle row（2）With macropore（1）The center of circle flushes, often the cut spreader hole on row（2）With macropore（1）The center of circle is center line
It is symmetrical arranged, the left and right sides sets three respectively；
Macropore（1）The DU411 macropores produced using Sandvik AB（1）Trolley is constructed, for vertical upward hole, hole depth
17025mm as initial compensation space, first using φ 165mm drill bit construction guidances hole, then changes the construction of φ 254mm drill bits and expands
Hole, finally using V30 drill bits construction φ 762mm macropores（1）, macropore is kept in work progress（1）Verticality；
Expand wellhole using the mining trolley constructions of Simba 1354, diameter phi 76mm is constructed using the two-shipper heart, movement height
Between 1900mm, hole depth 17457mm ~ 18935mm, lateral opening 75 °, minimum burden W=2500mm, bottom hole pitch 2000mm of angle ~
2500mm, aperture is away from for bottom hole pitch half, being 1000mm ~ 1250mm；
Expand wellhole and cut spreader hole（2）Explosion is carried out using delaying blasting mode, wherein J1 delay 5ms, J2 delays 40ms, J3 prolong
When 75ms, J4 delay 110ms, J5 delay 1200ms, J6 delay 1235ms, J7 delay 1270ms, J8 delay 1305ms；Middle row expands
Slot（2）Positioned at macropore（1）First cut spreader hole in left side（2）Be delayed 3700ms, upper row and lower row's cut spreader hole（2）Positioned at macropore
（1）First cut spreader hole in left side（2）Be delayed 3735ms, middle row's cut spreader hole（2）Positioned at macropore（1）First expansion slot on right side
Hole（2）Be delayed 4095ms, upper row and lower row's cut spreader hole（2）Positioned at macropore（1）First cut spreader hole on right side（2）It is delayed
4130ms, middle row's cut spreader hole（2）Positioned at macropore（1）Second cut spreader hole on right side（2）Be delayed 4165ms, and upper row expands slot with lower row
Hole（2）Positioned at macropore（1）Second cut spreader hole on right side（2）Be delayed 4200ms, middle row's cut spreader hole（2）Positioned at macropore（1）It is left
Second cut spreader hole of side（2）Be delayed 4560ms, upper row and lower row's cut spreader hole（2）Positioned at macropore（1）Second expansion slot in left side
Hole（2）Be delayed 4595ms, middle row's cut spreader hole（2）Positioned at macropore（1）The third cut spreader hole in left side（2）Be delayed 4630ms, on
Row and lower row's cut spreader hole（2）Positioned at macropore（1）The third cut spreader hole in left side（2）Be delayed 4665s, middle row's cut spreader hole（2）Position
In macropore（1）The third cut spreader hole on right side（2）Be delayed 5025ms, upper row and lower row's cut spreader hole（2）Positioned at macropore（1）Right side
First cut spreader hole（2）Be delayed 5050ms；
In above-mentioned expansion wellhole and cut spreader hole（2）Middle filling explosive carries out explosion, you can onepull grooving according to delay time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810004081.0A CN108166987B (en) | 2018-01-03 | 2018-01-03 | Poly- mine slot cuts a Trenching technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810004081.0A CN108166987B (en) | 2018-01-03 | 2018-01-03 | Poly- mine slot cuts a Trenching technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108166987A true CN108166987A (en) | 2018-06-15 |
| CN108166987B CN108166987B (en) | 2019-07-30 |
Family
ID=62517041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810004081.0A Expired - Fee Related CN108166987B (en) | 2018-01-03 | 2018-01-03 | Poly- mine slot cuts a Trenching technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108166987B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154830A (en) * | 2014-08-08 | 2014-11-19 | 西北矿冶研究院 | Medium-length hole blasting method for underground mining |
| CN104612725A (en) * | 2014-12-26 | 2015-05-13 | 中铁二局股份有限公司 | Underground cave depot middle-layer reloading construction method |
| CN105674816A (en) * | 2016-01-22 | 2016-06-15 | 河北钢铁集团矿业有限公司 | Medium-length hole blasting one-time shaft-forming method used for non-coal mine mountain |
| CN205537381U (en) * | 2016-01-22 | 2016-08-31 | 河北钢铁集团矿业有限公司 | Deep hole blasting simultaneous shaft -sinking's big gun hole arrangement structure in non - colliery mountain |
| CN106123713A (en) * | 2016-06-30 | 2016-11-16 | 本钢板材股份有限公司 | A kind of opencut medium-length hole blasting bore distribution method and blasting method |
-
2018
- 2018-01-03 CN CN201810004081.0A patent/CN108166987B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104154830A (en) * | 2014-08-08 | 2014-11-19 | 西北矿冶研究院 | Medium-length hole blasting method for underground mining |
| CN104612725A (en) * | 2014-12-26 | 2015-05-13 | 中铁二局股份有限公司 | Underground cave depot middle-layer reloading construction method |
| CN105674816A (en) * | 2016-01-22 | 2016-06-15 | 河北钢铁集团矿业有限公司 | Medium-length hole blasting one-time shaft-forming method used for non-coal mine mountain |
| CN205537381U (en) * | 2016-01-22 | 2016-08-31 | 河北钢铁集团矿业有限公司 | Deep hole blasting simultaneous shaft -sinking's big gun hole arrangement structure in non - colliery mountain |
| CN106123713A (en) * | 2016-06-30 | 2016-11-16 | 本钢板材股份有限公司 | A kind of opencut medium-length hole blasting bore distribution method and blasting method |
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| Publication number | Publication date |
|---|---|
| CN108166987B (en) | 2019-07-30 |
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