CN109322670A - It undercuts mining system on double tunnels to ring blasting - Google Patents
It undercuts mining system on double tunnels to ring blasting Download PDFInfo
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- CN109322670A CN109322670A CN201811345128.6A CN201811345128A CN109322670A CN 109322670 A CN109322670 A CN 109322670A CN 201811345128 A CN201811345128 A CN 201811345128A CN 109322670 A CN109322670 A CN 109322670A
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- undercuts
- tunnel
- blasthole
- undercuting
- undercut
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- 238000005065 mining Methods 0.000 title claims abstract description 28
- 238000005422 blasting Methods 0.000 title claims abstract description 24
- 238000007599 discharging Methods 0.000 claims abstract description 24
- 238000004880 explosion Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000011435 rock Substances 0.000 description 19
- 238000005553 drilling Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001141 propulsive effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D9/14—Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings
Abstract
The invention discloses undercuting mining system on double tunnels to ring blasting, which includes: that first tunnel and second that undercuts undercuts tunnel；First undercuts blasthole group, and setting undercuts above tunnel first and is connected with first tunnel that undercuts, and the first blasthole group that undercuts includes that multiple the first outsides for undercuting tunnels far from second undercut blasthole and multiple the first insides for undercuting tunnel close to second undercut blasthole；Second undercuts blasthole group, undercuts above tunnel second and is connected with second tunnel that undercuts, and the second blasthole group that undercuts includes that multiple the second outsides for undercuting tunnels far from first undercut blasthole and multiple the second insides for undercuting tunnel close to first undercut blasthole；And discharging tunnel.The system undercuts mode by using efficient " to fanhole(s) on double tunnels " large area explosion, is remarkably improved working efficiency and reduces production cost, and guarantees the stability of pulling end space bottom structure under the high stress environment of underground.
Description
Technical field
The present invention relates to industrial and mineral fields, specifically, the present invention relates to undercut mining on double tunnels to ring blasting
System.
Background technique
Natural caving method is a kind of extensive, low cost underground mining method, and production capacity is big, is convenient for tub of tissue
Reason, operation safety, cost of winning is low, is the efficient underground mining method that can uniquely match in excellence or beauty with strip mining transformation economic benefit.
However, existing natural caving method exploitation means still have much room for improvement.
Summary of the invention
The present invention is to be proposed based on inventor to following problems and true discovery:
Requirement of the natural caving method to orebody mining technical conditions is quite stringent, needs very high production management level and skill
The support of art strength, thus this method has more risk than other mining technologies.Wherein, the shape of pulling end space and the tunnel that undercuts
Arrangement for the operation that undercuts complexity and induction ore initially continue avalanche tool have a significant impact.
By consulting the related data in external natural caving method mine, inventor has found to adopt in conventional natural caving method production
With " to ring holes under single tunnel ", undercut mode, and the tunnel that undercuts is located at the surface of discharging tunnel, the spacing etc. in the tunnel that undercuts
In the spacing of discharging tunnel, (in Fig. 1,1 is the blasthole that undercuts, and 2 be the tunnel that undercuts, and 3 be discharging tunnel, and 4 be poly- mine as shown in Figure 1
Slot, 5 be peach-shaped ore pillar, and 6 be lower to the blasthole that undercuts).This mode undercuts, and tunnel is few, and project amount saves, but since there are parts
It is lower to the inclined drilling that undercuts (undercut blasthole), when undercuting explosion it is subsequent it is lower be easy to appear plug-hole phenomenon to drilling, especially
In fragmented rock, cleaning is extremely difficult, and expends a large amount of manpower and material resources.Two other undercuts the middle part between tunnel
Position explosion is bad, easily formation rock pillar, " floor ", dike etc., drastically influences the fltting speed that undercuts, causes to undercut in time quick-fried
The stress of broken release working face, to aggravate the destruction of bottom structure.And the processing such as rock pillar, " floor " are more difficult, need
Explosion is carried out by upward Drilling deep hole out of discharging tunnel, this can bring very detrimental effect to the stability of bottom structure,
And it is costly.
In consideration of it, the present invention proposes to undercut mining system on a kind of double tunnels to fan-shaped explosion.The system is by using height
" to fanhole(s) on double tunnels " large area explosion of effect undercuts mode, is remarkably improved working efficiency and reduces production cost,
And guarantee the stability of pulling end space bottom structure under the high stress environment of underground.
In one aspect of the invention, the invention proposes undercut to dig up mine to ring blasting on a kind of double tunnels to be
System.According to an embodiment of the invention, the system includes:
First tunnel and second that undercuts undercuts tunnel；
First undercuts blasthole group, and the described first blasthole group setting that undercuts undercuts above tunnel and described first with described the
One tunnel that undercuts is connected, and the described first blasthole group that undercuts includes that multiple the first outsides for undercuting tunnels far from described second undercut
Blasthole and multiple the first insides for undercuting tunnel close to described second undercut blasthole；
Second undercuts blasthole group, and the described second blasthole group setting that undercuts undercuts above tunnel and described second with described the
Two tunnels that undercut are connected, and the described second blasthole group that undercuts includes that multiple the second outsides for undercuting tunnels far from described first undercut
Blasthole and multiple the second insides for undercuting tunnel close to described first undercut blasthole；
Discharging tunnel, discharging tunnel setting undercuts between tunnel in described first tunnel and second that undercuts, and is located at
Described first tunnel and second that undercuts undercuts below tunnel.
Undercut mining system on double tunnels according to an embodiment of the present invention to ring blasting, by using double tunnels and
Sector first and second undercuts blasthole group form, and the top after undercuting is serrated, and is conducive to ore-rock avalanche and through discharging tunnel
It collects.By by the blasthole that respectively undercuts be arranged above the tunnel that undercuts on to the form of undercuting, avoid Drilling in the prior art
It is lower to hole, thoroughly solve the problems such as rock pillar in the prior art, " floor ", dike, improve the propulsion effect of pulling end space
Rate and quality, and reduce the concentration of the stress under the high stress environment of underground, it ensure that the stability of system bottom structure.
In addition, can also have on double tunnels according to the above embodiment of the present invention to the ring blasting mining system that undercuts
There is following additional technical characteristic:
In some embodiments of the invention, described first undercut tunnel and second undercut tunnel be arranged in peach-shaped to be exploited
The shoulder of ore pillar.
In some embodiments of the invention, described first undercut tunnel and described second undercut between tunnel it is horizontal away from
From for 10~20m.
In some embodiments of the invention, the discharging tunnel undercuts tunnel with described first tunnel and second that undercuts
Vertical range is separately 10~20m.
In some embodiments of the invention, the horizontal distance that the discharging tunnel undercuts tunnel with described first is L1,
The horizontal distance that the discharging tunnel undercuts tunnel with described second is L2, and L1=L2.
In some embodiments of the invention, first outside blasthole and described first that undercuts undercuts between the bottom surface of tunnel
Angle be 5~85 degree.
In some embodiments of the invention, first inside blasthole and described first that undercuts undercuts between the bottom surface of tunnel
Angle be 45~90 degree.
In some embodiments of the invention, second outside blasthole and described second that undercuts undercuts between the bottom surface of tunnel
Angle be 5~85 degree.
In some embodiments of the invention, second inside blasthole and described second that undercuts undercuts between the bottom surface of tunnel
Angle be 45~90 degree.
In some embodiments of the invention, undercut blasthole, the first inside of each first outside undercuts blasthole, second
Outside undercuts blasthole and the second inside undercuts, and the depth of blasthole is separately 5~15m.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is to be undercuted the structural schematic diagram of form under single tunnel to ring holes explosion in the prior art；
Fig. 2 is to show on double tunnels according to an embodiment of the invention to the undercut structure of mining system of ring blasting
It is intended to；
Fig. 3 is to undercut the structure of mining system on double tunnels of further embodiment according to the present invention to ring blasting
Schematic diagram.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " axis
To ", " radial direction ", the orientation or positional relationship of the instructions such as " circumferential direction " be to be based on the orientation or positional relationship shown in the drawings, be only for
Convenient for the description present invention and simplify description, rather than the device or element of indication or suggestion meaning there must be specific side
Position is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, the terms such as " installation ", " connected ", " connection ", " fixation "
It shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or is integral；It can be mechanical connection,
It is also possible to be electrically connected；It can be directly connected, can also can be inside two elements indirectly connected through an intermediary
The interaction relationship of connection or two elements, unless otherwise restricted clearly.For the ordinary skill in the art,
The specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In one aspect of the invention, the invention proposes undercut to dig up mine to ring blasting on a kind of double tunnels to be
System.According to an embodiment of the invention, with reference to Fig. 2, the system include: first undercut tunnel 100, second undercut tunnel 200, first
The blasthole that undercuts group, second undercut blasthole group and discharging tunnel 300.Wherein, the first blasthole group setting that undercuts undercuts tunnel first
100 tops and it is connected with first tunnel 100 that undercuts, the first blasthole group that undercuts includes multiple undercuting tunnel 200 far from second
First outside undercuts blasthole 110 and multiple the first insides for undercuting tunnel 200 close to second undercut blasthole 120；Second undercuts big gun
Group setting in hole undercuts above tunnel 200 second and is connected with second tunnel 200 that undercuts, and the second blasthole group that undercuts includes multiple
Far from first undercut tunnel 100 second outside undercut blasthole 210 and it is multiple close to first undercut tunnel 100 second in layback
Bottom blasthole 220；The setting of discharging tunnel 300 undercuts between tunnel 200 in first tunnel 100 and second that undercuts, and is located at first and draws
Bottom tunnel 100 and second undercuts the lower section of tunnel 200.
Undercut mining system on double tunnels according to an embodiment of the present invention to ring blasting, by using double tunnels and
Sector first and second undercuts blasthole group form, and the top after undercuting is serrated, and is conducive to ore-rock avalanche and through discharging tunnel
It collects.By by the blasthole that respectively undercuts be arranged above the tunnel that undercuts on to the form of undercuting, avoid Drilling in the prior art
It is lower to hole, thoroughly solve the problems such as rock pillar in the prior art, " floor ", dike, improve the propulsion effect of pulling end space
Rate and quality, and reduce the concentration of the stress under the high stress environment of underground, it ensure that the stability of system bottom structure.
According to an embodiment of the invention, as shown in Fig. 2, first undercut tunnel 100 and second undercut tunnel 200 setting to
The shoulder of peach-shaped ore pillar 400 is exploited, and is located at the side of poly- mine slot 500.It is arranged compared with the existing technology on peach-shaped ore pillar top
The form in one tunnel that undercuts, the system of the invention number of lanes that will undercut is changed to two, and position is arranged and moves to peach-shaped ore pillar
Shoulder, the problems such as can further advantageously accounting for rock pillar existing in the prior art, " floor ", dike as a result, to improve
The propulsive efficiency and quality of pulling end space, and the concentration of the stress under the high stress environment of underground is reduced, guarantee system bottom structure
Stability.
According to an embodiment of the invention, as shown in Fig. 2, first undercuts tunnel and the second horizontal distance for undercuting between tunnel
L can be 10~20m.The horizontal distance that traditional single tunnel undercuts in form between two tunnels is generally in 30m or so, this Shen
Double tunnels please undercut form by shortening the horizontal distance between two tunnels, increase the work that undercuts in identical region
Face number, improves rock penetration performance, to accelerate the speed that undercuts, can effectively avoid the prolonged stress in the face of undercuting and concentrates, have
Conducive to the stabilization of maintenance bottom structure.
According to an embodiment of the invention, discharging tunnel 300 and first undercut tunnel 100 and second undercut tunnel 200 hang down
Straight distance is separately 10~20m.As shown in Fig. 2, the vertical range that discharging tunnel 300 undercuts tunnel 100 with first is
H1, discharging tunnel 300 and first undercut tunnel 200 vertical range be H2, H1 and H2 can separately be 10~20m,
Thus, it is possible to reserve the peach-shaped ore pillar body of sufficient size, be further conducive to the stabilization of bottom structure.
According to an embodiment of the invention, as shown in Fig. 2, the horizontal distance that discharging tunnel 300 undercuts tunnel 100 with first is
L1, discharging tunnel 300 and second undercut tunnel 200 horizontal distance be L2, and L1=L2, discharging tunnel setting is the as a result,
One and second undercut tunnel middle position, symmetrical bottom structure peach-shaped ore pillar body can be formed, be further conducive to bottom
The stabilization of structure.
According to an embodiment of the invention, tunnel is serrated after undercuting, favorably after being undercuted using system of the invention
In ore-rock avalanche, after inventor using system of the invention in practice, it has been found that undercuted, when initial avalanche Rock fragmentation compared with
Greatly, to guarantee that breaking ores have preferable mobility in favor of clearing up the bottom plate that undercuts, the blasthole that undercuts of ore pillar two sides is set
Inclination angle should be greater than the angle of friction that generates between fractured rock and protolith.
Blasthole 110 and the first angle for undercuting between 100 bottom surface of tunnel according to an embodiment of the invention, the first outside undercuts
It can be 5~85 degree.According to an embodiment of the invention, the first inside undercuts, blasthole 120 and first undercuts between 100 bottom surface of tunnel
Angle can be 45~90 degree.As a result, the form of undercuting of the invention be not provided with lower than first undercut 100 bottom surface of tunnel it is lower to
Drilling, and by using the first outside undercut blasthole 110 and the first inside undercut the formation of blasthole 120 on undercut big gun to sector
Hole can thoroughly solve the problems such as ore-rock forms rock pillar, " floor ", dike after explosion undercuts, significantly improve working efficiency and reduce
Production cost, and guarantee the stability of pulling end space bottom structure under the high stress environment of underground.
Blasthole 210 and the second angle for undercuting between 200 bottom surface of tunnel according to an embodiment of the invention, the second outside undercuts
It can be 5~85 degree.According to an embodiment of the invention, the second inside undercuts, blasthole 220 and second undercuts between 200 bottom surface of tunnel
Angle can be 45~90 degree.As a result, the form of undercuting of the invention be not provided with lower than second undercut 100 bottom surface of tunnel it is lower to
Drilling, and by using the second outside undercut blasthole 210 and the second inside undercut the formation of blasthole 220 on undercut big gun to sector
Hole can thoroughly solve the problems such as ore-rock forms rock pillar, " floor ", dike after explosion undercuts, significantly improve working efficiency and reduce
Production cost, and guarantee the stability of pulling end space bottom structure under the high stress environment of underground.
According to an embodiment of the invention, each first outside undercuts, the 110, first inside of blasthole undercuts outside blasthole 120, second
The depth for the blasthole 220 that undercuts on the inside of layback bottom blasthole 210 and second is separately 5~15m.Be conducive to be promoted as a result, quick-fried
Broken effect, reduces lump ore rate, releases convenient for the ore after explosion from bottom structure.
According to an embodiment of the invention, as shown in figure 3, undercut mining system to ring blasting on multiple double tunnels can
With arranged for interval, between two systems between be separated with slot raise 600.
In summary, it undercuts mining system on double tunnels according to an embodiment of the present invention to ring blasting, by adopting
It is undercuted blasthole group form with double tunnels and sector first and second, the top after undercuting is serrated, and is conducive to ore-rock avalanche simultaneously
It is collected through discharging tunnel.By by the blasthole that respectively undercuts be arranged above the tunnel that undercuts on to the form of undercuting, avoid existing
Drilling is lower to hole in technology, thoroughly solves the problems such as rock pillar in the prior art, " floor ", dike, improves the sky that undercuts
Between propulsive efficiency and quality, and reduce the stress under the high stress environment of underground concentration, ensure that the steady of system bottom structure
It is qualitative.
Below with reference to specific embodiment, present invention is described, it should be noted that these embodiments are only to describe
Property, without limiting the invention in any way.
Embodiment
Certain copper mine deep, which undercuts, horizontal to undercut mode using on double tunnels to ring blasting
Phenomena such as in order to reduce rock pillar during undercuting, " floor ", guarantee the quality to undercut and efficiency, which draws
Bottom water is flat to undercut mining system using on double tunnels of the invention to fan-shaped explosion, i.e., the tunnel that will undercut is from the shifting of peach-shaped ore pillar top
To shoulder, the tunnel that undercuts is changed to two tunnels.First and second horizontal spaces for undercuting tunnel are 15m.By practicing,
Double tunnel upward hole modes of undercuting are avoided to hole under Drilling, and thoroughly solve the problems, such as " floor ", improve the efficiency that undercuts
And quality, and reduce stress concentration, it ensure that the stability of bottom structure, real-world effectiveness effect are fine.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. undercuting mining system on a kind of double tunnels to ring blasting characterized by comprising
First tunnel and second that undercuts undercuts tunnel；
First undercuts blasthole group, and the described first blasthole group setting that undercuts undercuts above tunnel described first and draws with described first
Bottom tunnel is connected, and the described first blasthole group that undercuts includes that multiple the first outsides for undercuting tunnels far from described second undercut blasthole
It undercuts blasthole with multiple the first insides for undercuting tunnel close to described second；
Second undercuts blasthole group, and the described second blasthole group setting that undercuts undercuts above tunnel described second and draws with described second
Bottom tunnel is connected, and the described second blasthole group that undercuts includes that multiple the second outsides for undercuting tunnels far from described first undercut blasthole
It undercuts blasthole with multiple the second insides for undercuting tunnel close to described first；
Discharging tunnel, discharging tunnel setting undercuts between tunnel in described first tunnel and second that undercuts, and is located at described
First tunnel and second that undercuts undercuts below tunnel.
2. undercuting mining system on double tunnels according to claim 1 to ring blasting, which is characterized in that described
One undercuts tunnel and the shoulder of peach-shaped ore pillar to be exploited is arranged in second tunnel that undercuts.
3. undercuting mining system on double tunnels according to claim 1 to ring blasting, which is characterized in that described
One undercuts tunnel and the described second horizontal distance for undercuting between tunnel is 10~20m.
4. undercuting mining system on double tunnels according to claim 3 to ring blasting, which is characterized in that it is described go out
Mine tunnel with described first undercut tunnel and second undercut tunnel vertical range be separately 10~20m.
5. undercuting mining system on double tunnels according to claim 4 to ring blasting, which is characterized in that it is described go out
The horizontal distance that mine tunnel undercuts tunnel with described first is L1, the discharging tunnel with described second undercut tunnel it is horizontal away from
From for L2, and L1=L2.
6. undercuting mining system on double tunnels according to claim 1 to ring blasting, which is characterized in that described
One outside undercuts blasthole and the described first angle for undercuting between the bottom surface of tunnel is 5~85 degree.
7. undercuting mining system on double tunnels according to claim 1 to ring blasting, which is characterized in that described
One inside undercuts blasthole and the described first angle for undercuting between the bottom surface of tunnel is 45~90 degree.
8. undercuting mining system on double tunnels according to claim 1 to ring blasting, which is characterized in that described
Two outsides undercut blasthole and the described second angle for undercuting between the bottom surface of tunnel is 5~85 degree.
9. undercuting mining system on double tunnels according to claim 1 to ring blasting, which is characterized in that described
Two insides undercut blasthole and described second angle of bottom surface between tunnel that undercuts is 45~90 degree.
10. undercuting mining system on double tunnels according to claim 1 to ring blasting, which is characterized in that each
First outside undercut blasthole, the second outside of blasthole, the first inside that undercut undercuts blasthole and the second inside undercuts the depth of blasthole
Degree is separately 5~15m.
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| CN201811345128.6A CN109322670B (en) | 2018-11-13 | 2018-11-13 | Double-roadway upward fan-shaped blast hole blasting bottom-pulling mining system |
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| CN201811345128.6A CN109322670B (en) | 2018-11-13 | 2018-11-13 | Double-roadway upward fan-shaped blast hole blasting bottom-pulling mining system |
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| CN109322670B CN109322670B (en) | 2024-03-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963175A (en) * | 2020-07-28 | 2020-11-20 | 广西大学 | Thick ore body mining method |
| CN112033243A (en) * | 2020-09-16 | 2020-12-04 | 云南迪庆有色金属有限责任公司 | Upward sector wave-shaped bottom-pulling blasting method |
| CN113669064A (en) * | 2021-08-31 | 2021-11-19 | 中国恩菲工程技术有限公司 | Natural caving mining method |
| CN114412468A (en) * | 2022-02-07 | 2022-04-29 | 北京科技大学 | Caving-to-filling transition subsection and isolated ore pillar combined mining method |
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| CN114412468A (en) * | 2022-02-07 | 2022-04-29 | 北京科技大学 | Caving-to-filling transition subsection and isolated ore pillar combined mining method |
| CN114412468B (en) * | 2022-02-07 | 2022-09-30 | 北京科技大学 | Caving-to-filling transition subsection and isolated ore pillar combined mining method |
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