CN108362181A - A kind of driving recovery method of extra narrow vein ore body - Google Patents
A kind of driving recovery method of extra narrow vein ore body Download PDFInfo
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- CN108362181A CN108362181A CN201810134986.XA CN201810134986A CN108362181A CN 108362181 A CN108362181 A CN 108362181A CN 201810134986 A CN201810134986 A CN 201810134986A CN 108362181 A CN108362181 A CN 108362181A
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- hole
- explosive
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- ore
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
Abstract
This disclosure relates to which a kind of driving recovery method of extra narrow vein ore body, this method include：Driving exploitation extra narrow vein ore body is carried out according to mine trend, to form exploitation space；Wherein, the dip angle of the extra narrow vein ore body is more than 50 °, and orebody thickness is less than 1.2 meters；When exploiting the extra narrow vein ore body according to mine trend driving and forming 45 meters long of exploitation space, the country rock on removal exploitation space periphery is to form tunnel.Disclosed method first carries out driving exploitation along mine trend, is formed with the exploitation space conducive to driving exploitation, when exploiting 45 meters, the country rock for exploiting space periphery is removed again, tunnel up to specification is formed, country rock is mixed into reduce in driving exploitated ore, reduces ore dilution, improve mining recovery, beneficiation cost and metal loss are reduced, and safe and efficient, improves milling ore grade and selecting and smelting recovery rate, voluminous gold, overall economic efficiency are notable.
Description
Technical field
This disclosure relates to mining technique field, and in particular, to a kind of driving recovery method of extra narrow vein ore body.
Background technology
In the tunneling process of extra narrow vein ore body, since orebody thickness is relatively thin, during full advance, easily lead
Cause the rate of dilution excessive, to make ore quality degradation, mine grade is relatively low, and mining cost is high.
Invention content
Purpose of this disclosure is to provide a kind of driving recovery method of extra narrow vein ore body, disclosed method can reduce
The rate of dilution of ore body.
To achieve the goals above, the disclosure provides a kind of driving recovery method of extra narrow vein ore body, and this method includes：
Driving exploitation extra narrow vein ore body is carried out according to mine trend, to form exploitation space；Wherein, the extra narrow vein
The dip angle of ore body is more than 50 °, and orebody thickness is less than 1.2 meters；
When exploiting the extra narrow vein ore body according to mine trend driving and forming 4-5 meters long of exploitation space, removal
The country rock on space periphery is exploited to form tunnel.
Optionally, the dip angle of the extra narrow vein ore body is 60-90 °, and orebody thickness is less than 1.0 meters.
Optionally, described the step of carrying out driving exploitation extra narrow vein ore body according to mine trend, includes：
A, slotting operation is carried out to mineral ore in the horizontal direction and explosive is installed, then pinpoint blasting forms burst region；
B, it transports the ore that burst region borehole blasting is fallen and forms exploitation space.
Optionally, the explosive is nitrolite, using non-conductive booster millisecond detonating.
Optionally, the slotting operation includes the first explosive hole of setting, and first explosive hole includes hole, periphery from the bottom of one's heart
Hole, via hole and bottom outlet, the hole from the bottom of one's heart, via hole and bottom outlet are set in the mineral ore and the hole from the bottom of one's heart, via hole and
Bottom outlet is from top to bottom arranged, and the periphery hole is set on the country rock of the mineral ore periphery；
The detonation sequencing of the pinpoint blasting is followed successively by hole, periphery hole, via hole and bottom outlet from the bottom of one's heart.
Optionally, the depth in first explosive hole is 1.2-1.5 meters, and the explosive amount of fill in each first explosive hole is
0.5-1 kilograms, it is 70-95 bodies % that explosive, which fills up rate,.
Optionally, the horizontal extent of the slotting operation is less than 1.3 meters, is more than mineral ore thickness.
Optionally, the width that the burst region is formed by per separate explosion is 0.9-1.1 meters, is highly 2.1-2.5 meters,
Depth is 0.8-0.9 meters.
Optionally, described the step of removing the country rock for exploiting space periphery to form tunnel, includes：
On country rock carry out slotting formed the second explosive hole and install explosive carry out explosion, second explosive hole according to from
High order under includes upper hole, mesoporous and lower opening successively；The span length is 1.5-3 meters, is highly 2.1-2.5
Rice.
Optionally, the depth in second explosive hole is 1.4-1.6 meters, and the explosive amount of fill in each second explosive hole is
0.4-0.8 kilograms, it is 40-60 bodies % that explosive, which fills up rate,.
Disclosed method first carries out driving exploitation along mine trend, is formed with the exploitation space conducive to driving exploitation, waits for
When exploiting 4-5 meters, then the country rock removal on space periphery will be exploited, and tunnel up to specification be formed, in exploitation reducig ore
It is mixed into country rock, reduces ore dilution, improves mining recovery, beneficiation cost and metal loss is reduced, and safe and efficient, improves
Milling ore grade and selecting and smelting recovery rate, voluminous gold, overall economic efficiency are notable.
Other feature and advantage of the disclosure will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is for providing further understanding of the disclosure, and a part for constitution instruction, with following tool
Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings：
Fig. 1 is a kind of schematic diagram of concrete arrangement in the first explosive of published method hole.
Fig. 2 is a kind of schematic diagram of concrete arrangement in the second explosive of published method hole.
Reference sign
12 periphery hole of hole, 3 via hole from the bottom of one's heart
4 bottom outlet, 5 country rock, 6 mineral ore
8 mesoporous of hole, 9 lower opening on 7
Specific implementation mode
The specific implementation mode of the disclosure is described in detail below in conjunction with attached drawing.It should be understood that this place is retouched
The specific implementation mode stated is only used for describing and explaining the disclosure, is not limited to the disclosure.
In the disclosure, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower " typically refer to relative to
It, specifically can be with the page of reference chart 1-2 above and below for vertical direction.
The disclosure provides a kind of driving recovery method of extra narrow vein ore body, and this method includes：It is carried out according to mine trend
Driving exploitation extra narrow vein ore body, to form exploitation space；Wherein, the dip angle of the extra narrow vein ore body is more than 50 °, mine
Body thickness is less than 1.2 meters；When exploiting the extra narrow vein ore body according to mine trend driving and form 4-5 meters long of exploitation space
When, the country rock on removal exploitation space periphery is to form tunnel.
Disclosed method is suitable for very thin and inclined mineral ore, under preferable case, the mineral ore of the extra narrow vein ore body
Inclination angle is preferably 60-90 °, and orebody thickness is preferably smaller than 1.0 meters, and country rock should be more than moderately stable degree, and Orebody Grade should be
On grade with extraction value, dip angle refers to rock face or mine surface is with angle, orebody thickness formed by horizontal plane
Refer to the vertical range between the upper disk and lower wall of ore body.
The disclosure carries out driving exploitation ore body according to the minimum space suitable for driving exploitation along mine trend, to reduce mine
The dilution of stone, it is described according to mine trend carry out driving exploitation extra narrow vein ore body the step of may include：A, in the horizontal direction
Slotting operation is carried out to mineral ore and explosive is installed, then pinpoint blasting forms burst region；In the step, ore is with throwing
Form is got off and be deposited in burst region by explosion.B, it transports the ore that burst region borehole blasting is fallen and forms exploitation sky
Between.Burst region is cleared up to get to exploitation space, exploitation space is only applicable to the explosion of carrying formation exploitation space institute and falls
The ore fallen, the ore that follow-up stope explosion is got off do not fit through exploitation space transoportation and go out stope, it is therefore desirable to removal exploitation
The country rock on space periphery is to form the tunnel of suitable Ore Transportation.
The explosive of various suitable explosions may be used in the disclosure, for example, the explosive is nitrolite, and using non-conductive
Booster millisecond detonating, nitrolite are the explosive mechanical impurities of powdery, have intermediate yield and certain sensibility,
It is relatively stable under room temperature, it is insensitive to strike, collision or friction, it is suitble to apply to mining blasting.Millisecond detonating is also millisecond
Delay blasting, short-delay time can efficiently control Blasting shock wave, vibrations, noise and fly generally between 50-100 milliseconds
Stone is easy to operate, safe, rapid.
According to the disclosure, slotting operation generally uses the drilling tools such as airleg rock drill to dig eye on rock, can wrap
The first explosive hole of setting is included, as shown in Figure 1, first explosive hole may include hole 1, periphery hole 2, via hole 3 and bottom from the bottom of one's heart
Hole 4, the hole from the bottom of one's heart 1, via hole 3 and bottom outlet 4 can be set in the mineral ore 6 and the hole from the bottom of one's heart 1, via hole 3 and bottom
Hole 4 can be from top to bottom arranged, and the periphery hole can be set on the country rock 5 of 6 periphery of the mineral ore；The pinpoint blasting
The sequencing that detonates can be successively hole 1, periphery hole 2, via hole 3 and bottom outlet 4 from the bottom of one's heart.Hole is used for the explosion in development end from the bottom of one's heart
Blasting condition is created in the new scope of freedom for other blastholes, and via hole is for a large amount of broken ores and expands hole explosion from the bottom of one's heart
Region, periphery hole are used for the country rock on explosion mineral ore periphery with the larger exploitation space of forming region, and bottom outlet is empty for blasting excavation
Between bottom with suitable for exploitation space enter walking.
According to the disclosure, after explosion, can first be aerated, so that air CO contents reduce, suitable services people
Member enters, and can be carried out by air blower and air duct fabric, exhaust equipment can also be arranged, to accelerate air circulation.It then can be with
It carries out pouring slag, rectification site safety environment, prevents the problems such as falling rock, the ore and cleaning then carried out in cleaning slotting is removed
Transport the work such as the ore under explosion.
According to the disclosure, depth, explosive amount of fill and the explosive in explosive hole fill up rate and there is influence to the effect of explosion, this
It is open inventor's experience have shown that, the depth in first explosive hole is 1.2-1.5 meter, the explosive filling in each first explosive hole
Amount is 0.5-1 kilograms, and it is 70-95 body % that explosive, which fills up rate, can obtain good explosion effect in the case where saving explosive
Fruit.
According to the disclosure, slotting operation should be carried out according to mine trend and specific configuration, since disclosure orebody thickness is small
In 1.2 meters, in order to reduce the rate of dilution, the horizontal extent of the slotting operation is preferably smaller than 1.3 meters, is more than mineral ore thickness, described
The horizontal extent of slotting operation refers to the longest distance in horizontal direction between explosive hole.In order to facilitate pedestrian and ore is carried,
It is preferably 0.9-1.1 meters to be formed by the width of the burst region per separate explosion, in fact it is highly preferred that is 2.1-2.5 meters, depth is excellent
It is selected as 0.8-0.9 meters.
According to the disclosure, when exploiting space and reaching certain length, may exist unsmooth, ore difficult of divulging information,
The problems such as outstanding side of pressure and falling rocks, therefore, it is necessary to remove the country rock on exploitation space periphery to form tunnel, as shown in Fig. 2, the step
May include：On country rock carry out slotting formed the second explosive hole and install explosive carry out explosion, second explosive hole according to
High order from top to bottom includes upper hole 7, mesoporous 8 and lower opening 9 successively；The span length can be 1.5-3 meters, highly may be used
Think 2.1-2.5 meters.Upper hole, mesoporous and lower opening be respectively used to stope spatial neighborhood country rock it is upper, in and lower three positions into
Row explosion, to form tunnel.Further explosion is carried out since the second explosive hole is used for the periphery in the stope space that explosion is formed,
Therefore its explosion difficulty reduce, the disclosed invention people's experience have shown that, the depth in second explosive hole is preferably 1.4-1.6
Rice, the explosive amount of fill in each second explosive hole is preferably 0.4-0.8 kilograms, and the explosive rate of filling up is preferably 40-60 body %, can be with
In the case where saving explosive, good demolition effect is provided.
The disclosure is further illustrated below by embodiment, but the disclosure is not therefore any way limited.
Embodiment
The slotting operation in horizontal direction along the pulse is carried out first, retains country rock, the explosive hole of slotting operation to greatest extent
Arrangement, charge constitution and blasting sequence are point important element tasks of pick.As shown in Figure 1,10, the first explosive hole, hole depth from the bottom of one's heart
1.40-1.45m, via hole and periphery hole depth 1.3m form 1.03m (width) × 2.25m's (height) after the completion per separate explosion
Burst region specifications section, drilling depth 0.80-0.90m is more satisfactory, disclosure satisfy that rock drilling, the needs for clearing up replica selection operation.
In the case that arrangement is constant in explosive hole, changes auxiliary orifice angle and charge constitution carries out pinpoint blasting, every time may be used
Have near 1/2 ore storage to notch, condition is created for machinery makeup mine transport.Blasted material is fried using 4#-2 water resistant ammonium nitrates
Medicine, nonel tube millisecond detonating.The distribution of first time slotting dose is shown in Table 1, and with the increase of slotting length (depth), ore is thrown
Throw the lengthening of distance, when each slotting will adjust the explosive payload of hole, via hole and bottom outlet from the bottom of one's heart.Firing order is hole-week from the bottom of one's heart
Lateral opening-bottom outlet.
1 rock and ore separate mining Cut Blasting parameter of table
Five times slotting length 4.0-4.5m stops slotting, transports net development end ore, and onepull country rock reaches tunnel design
Specification, explosion country rock steel for shot are shown in that Fig. 2, explosive payload are shown in Table 2.
2 explosion Analysis of Field Geotechnical Parameters of table
Original blasting in once-through formation tunnel is excessive due to being mixed into country rock, it may be caused not have recovery value.With it is original
The method that blasting in once-through forms tunnel is compared, and disclosed method can reduce in driving exploitated ore and be mixed into country rock, reduce
Ore tunnels the rate of dilution so that driving ores recovery value improves mining recovery, effectively prevents metal loss, greatly
Improve economic benefit.
The preferred embodiment of the disclosure is described in detail above in association with attached drawing, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure
Monotropic type, these simple variants belong to the protection domain of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the disclosure to it is various can
The combination of energy no longer separately illustrates.
In addition, arbitrary combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought equally should be considered as disclosure disclosure of that.
Claims (10)
1. a kind of driving recovery method of extra narrow vein ore body, this method include：
Driving exploitation extra narrow vein ore body is carried out according to mine trend, to form exploitation space；Wherein, the extra narrow vein ore body
Dip angle be more than 50 °, orebody thickness be less than 1.2 meters；
When exploiting the extra narrow vein ore body according to mine trend driving and forming 4-5 meters long of exploitation space, removal exploitation
The country rock on space periphery is to form tunnel.
2. according to the method described in claim 1, wherein, the dip angle of the extra narrow vein ore body is 60-90 °, ore body thickness
Degree is less than 1.0 meters.
3. described to carry out driving exploitation extra narrow vein ore body according to mine trend according to the method described in claim 1, wherein
Step includes：
A, slotting operation is carried out to mineral ore in the horizontal direction and explosive is installed, then pinpoint blasting forms burst region；
B, it transports the ore that burst region borehole blasting is fallen and forms exploitation space.
4. according to the method described in claim 3, wherein, the explosive is nitrolite, using non-conductive booster millisecond detonating.
5. according to the method described in claim 3, wherein, the slotting operation includes the first explosive hole of setting, described first is fried
Medicine hole includes hole, periphery hole, via hole and bottom outlet from the bottom of one's heart, the hole from the bottom of one's heart, via hole and bottom outlet be set in the mineral ore and
The hole from the bottom of one's heart, via hole and bottom outlet are from top to bottom arranged, and the periphery hole is set on the country rock of the mineral ore periphery；
The detonation sequencing of the pinpoint blasting is followed successively by hole, periphery hole, via hole and bottom outlet from the bottom of one's heart.
6. according to the method described in claim 5, wherein, the depth in first explosive hole is 1.2-1.5 meters, and each first is fried
The explosive amount of fill in medicine hole is 0.5-1 kilograms, and it is 70-95 bodies % that explosive, which fills up rate,.
7. according to the method described in claim 3, wherein, the horizontal extent of the slotting operation is less than 1.3 meters, and it is thick to be more than mineral ore
Degree.
8. according to the method described in claim 3, wherein, the width that the burst region is formed by per separate explosion is 0.9-
1.1 meters, be highly 2.1-2.5 meters, and depth is 0.8-0.9 meters.
9. according to the method described in claim 1, wherein, the step of country rock on space periphery is to form tunnel is exploited in the removal
Including：
On country rock carry out slotting formed the second explosive hole and install explosive carry out explosion, second explosive hole according to from up to
Under high order successively include upper hole, mesoporous and lower opening；The span length is 1.5-3 meters, is highly 2.1-2.5 meters.
10. according to the method described in claim 9, wherein, the depth in second explosive hole is 1.4-1.6 meters, each second
The explosive amount of fill in explosive hole is 0.4-0.8 kilograms, and it is 40-60 bodies % that explosive, which fills up rate,.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111305843A (en) * | 2020-03-25 | 2020-06-19 | 甘洛大桥矿业有限公司 | Mining method of phosphorite ultrathin ore body |
| CN112161534A (en) * | 2020-10-16 | 2021-01-01 | 重庆大学 | One-step mining control blasting method for mine underground upward access |
| CN112815795A (en) * | 2021-01-28 | 2021-05-18 | 安徽马钢张庄矿业有限责任公司 | Blasting method for end part extremely-thin ore body resources |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997763A (en) * | 2012-11-29 | 2013-03-27 | 青海山金矿业有限公司 | Method for blasting inclined thin ore body by dividing ores and rocks in area in drift driving |
| CN105735996A (en) * | 2016-02-01 | 2016-07-06 | 中南大学 | Presplitting type wall cutting and filling stoping method for thin ore vein |
| CN106150505A (en) * | 2016-08-30 | 2016-11-23 | 北京矿冶研究总院 | Efficient fine blasting method for ultrathin ore body |
-
2018
- 2018-02-09 CN CN201810134986.XA patent/CN108362181B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102997763A (en) * | 2012-11-29 | 2013-03-27 | 青海山金矿业有限公司 | Method for blasting inclined thin ore body by dividing ores and rocks in area in drift driving |
| CN105735996A (en) * | 2016-02-01 | 2016-07-06 | 中南大学 | Presplitting type wall cutting and filling stoping method for thin ore vein |
| CN106150505A (en) * | 2016-08-30 | 2016-11-23 | 北京矿冶研究总院 | Efficient fine blasting method for ultrathin ore body |
Non-Patent Citations (3)
| Title |
|---|
| 周君才: "急倾斜极薄金矿床开采中降低矿损贫化的途径", 《昆明工学院学报》 * |
| 周君才: "论稳固围岩急倾斜极薄矿体中深孔分采空场法的应用", 《云南冶金》 * |
| 邢海清等: "微差爆破在采掘工程中的实践", 《有色矿冶》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111305843A (en) * | 2020-03-25 | 2020-06-19 | 甘洛大桥矿业有限公司 | Mining method of phosphorite ultrathin ore body |
| CN112161534A (en) * | 2020-10-16 | 2021-01-01 | 重庆大学 | One-step mining control blasting method for mine underground upward access |
| CN112161534B (en) * | 2020-10-16 | 2022-06-03 | 重庆大学 | One-step mining control blasting method for mine underground upward access |
| CN112815795A (en) * | 2021-01-28 | 2021-05-18 | 安徽马钢张庄矿业有限责任公司 | Blasting method for end part extremely-thin ore body resources |
| CN112815795B (en) * | 2021-01-28 | 2022-10-18 | 安徽马钢张庄矿业有限责任公司 | Blasting method for end part extremely-thin ore body resources |
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