CN107542468A - A kind of natural caving method - Google Patents
A kind of natural caving method Download PDFInfo
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Abstract
The present invention relates to underground mining technical field, more particularly to a kind of natural caving method, to solve the problems, such as that the ore body mine more firm than upper armor rock and lower wall country rock security incident rate in blasting excavation is high, cost of winning is high.Natural caving method comprises the following steps：Artificial fracturing：According to geologic information, fractured zones rule and the stress distribution data on basis, artificial fracturing is carried out to the ore body of stope；Monitoring fractures：Artificial fracturing region is monitored, obtains distribution and the expanded range in crack；Free breakage：Ore body drops naturally.The natural caving method of the present invention is applied to the ore body mining more firm than upper armor rock and lower wall country rock.
Description
Technical field
The present invention relates to underground mining technical field, more particularly to a kind of natural caving method.
Background technology
Natural caving method is as a kind of mining methods efficiently, inexpensive, the energy when exploiting low-grade broken type ore body
It is enough fully to reclaim and using resource, there is fairly obvious and unique advantage.
Natural caving method is a kind of mining methods of the high intensity independent of extensive driling explosion, and this method is by means of drawing
Bottom (is aided with cuts side or presplitting if necessary) engineering factor on nugget border, lures that the stress in ore-rock changes into, so that
Structural plane in ore body constantly extends the fracture network to form insertion, and issues raw free breakage in Gravitative Loads.
Its mechanism of action after nugget large area undercuts, destroys nugget as shown in figure 1, in the good ore-rock of collapsing property
The stress equilibrium of interior ore body, causes stresses re-distribution, will necessarily form new balanced arch, and the ore in arch is because by Action of Gravity Field
And periodically come off.
The existing mine using natural caving method mining includes nonferrous metal mine, and the ore body of nonferrous metal mine is compared to upper
Armor rock and lower wall unstable rock, crack are more developed, as shown in Fig. 2 therefore the collapsing property of ore body is preferable, are adapted to using certainly
Right Caving Method with Large Space is exploited, and specifically, such as in Tongkuangyu copper copper mine, natural caving method exploitated ore has been applied successfully.
The use condition of natural caving method is：Ore body be it is unsteady, and upper armor rock and lower wall country rock be it is firm, most
Ideal conditions is that ore body is medium hard, and ore body has intensive joint and crack, can be certainly after undercuting to certain area
Right avalanche is into the ore being of moderate size.
Natural caving method is unsuitable for, and ore body is that stable and upper armor rock and lower wall country rock are unstable mines.
It is stable for ore body, and upper armor rock and lower wall country rock are unstable mines, such as ferrous metal mine
(ore body of ferrous metal mine is consolidated with respect to country rock, and crack is not enough developed), as shown in figure 3, because being unsatisfactory for existing collapsing naturally
Fall the use condition of method, at present, the most frequently used mining type is the mode of blasting excavation.
Blasting excavation is in working face, using explosion so that nugget loosening is broken, so as to realize the mode of exploitation.
The deficiency of blasting excavation is that explosion can cause the explosions such as security incident rate height, cost of winning height to endanger.
The content of the invention
(1) technical problems to be solved
It is more steady than upper armor rock and lower wall country rock to solve ore body it is an object of the invention to provide a kind of natural caving method
Solid the problem of security incident rate is high in blasting excavation, cost of winning is high in mine.
(2) technical scheme
In order to achieve the above object, the main technical schemes that the present invention uses include：
The present invention provides a kind of natural caving method.Specifically, natural caving method, suitable for ore body than upper armor rock and lower wall
The firm mine of country rock, it comprises the following steps：
Artificial fracturing：According to geologic information, fractured zones rule and the stress distribution data on basis, the ore body of stope is entered
Pedestrian is exquisite to be split；
Monitoring fractures：Artificial fracturing region is monitored, obtains distribution and the expanded range in crack；
Free breakage：Ore body drops naturally.
Further, basic geologic information and fractured zones rule are obtained by means of following steps：
Geologic prospect：Geologic prospect is carried out to stope, obtains the geologic information and fractured zones rule on basis；
Stress distribution data is obtained by means of following steps：
In-situ stress monitoring：Obtain stress distribution data.
Further, when the distribution in crack and expanded range do not reach optimal free breakage condition, then repetitive manual presplitting
And monitoring fractures, until being optimal free breakage condition when the distribution in crack and expanded range, terminate artificial presplitting and crack
Monitoring.
Further, in artificial fracturing step：
The mode of artificial fracturing is to apply high pressure to nugget by fracturing hole to act on.
Further, it is high-pressure fluid and gases at high pressure by way of fracturing hole applies high pressure effect to nugget.
Further, in artificial fracturing step：
The mode of artificial fracturing is high-voltage pulse fracturing.
Further, the arrangement form in fracturing hole is lateral aperture, vertical holes and angling hole.
Further, in free breakage step：
Setting cuts slope laneway 8 and carries out avalanche boundary Control.
Further, in geologic prospect step：
The mode of geologic prospect is one or more in ultrasonic wave, physical prospecting, micro seismic monitoring.
Further, in in-situ stress monitoring step：
The mode of in-situ stress monitoring is to include hydraulic fracturing, acoustic-emission, rigid package body stress meter method.
Further, in monitoring fractures step：
The mode of monitoring fractures is a kind of in microseism, sound hair ripple, ultrasonic wave, borehole camera, multipoint displacement meter and inclinometer
It is or a variety of.
(3) beneficial effect
The beneficial effects of the invention are as follows：
The natural caving method of the present invention, is caused original on the fractured zones and scope ratio nugget on nugget using artificial fracturing
Fractured zones and scope increase, reduce the solid coefficient of nugget, and then improve the collapsing property of nugget, realize ore
Free breakage.
The natural caving method of the present invention, it is that the back production of mineral can be achieved without using explosion, not only reduces concussion of blasting
Influence, and reduce the generation of explosion blasting fume, realize green high-efficient exploitation.
The natural caving method of the present invention, the ore body ore deposit more firm than upper armor rock and lower wall country rock is realized using artificial fracturing
The natural caving method exploitation on mountain, staff reduce the probability that accident occurs, protected without being worked under exposed upper armor rock
Safety in production is demonstrate,proved.
The natural caving method of the present invention, the ore body ore deposit more firm than upper armor rock and lower wall country rock is realized using artificial fracturing
The natural caving method exploitation on mountain, eliminates the high expense of explosion, reduces the cost of mining, and then improve the economy in mine
Benefit, realize the economic exploitation.
The natural caving method of the present invention, the ore body ore deposit more firm than upper armor rock and lower wall country rock is realized using artificial fracturing
The natural caving method exploitation on mountain so that the bulk treatment progress during ore drawing shifts to an earlier date, and broken ore is controlled before back production
Lumpiness, avoid ore drawing blocking and second-time breakage problem.
To sum up, natural caving method of the invention is not only not present the ore body mine more firm than upper armor rock and lower wall country rock and existed
The problem of security incident rate is high in blasting excavation, cost of winning is high, and green high-efficient exploitation is realized, put in addition, avoiding
Ore deposit blocks and second-time breakage problem.
Brief description of the drawings
Fig. 1 is free breakage mechanism schematic diagram in background technology；
Fig. 2 is nonferrous metal mine ore-rock feature schematic diagram in background technology；
Fig. 3 is ferrous metal mine ore-rock feature schematic diagram in background technology；
Fig. 4 is the flow chart of natural caving method in embodiment；
Fig. 5 be in embodiment under to vertical parallel hole schematic diagram；
Fig. 6 be in embodiment on to vertical parallel hole schematic diagram；
Fig. 7 is horizontal parallel hole schematic diagram in embodiment；
Fig. 8 is high-dipping ore block natural fissure schematic diagram (horizontal fissure) in embodiment；
Fig. 9 is horizontal parallel hole layout drawing in embodiment；
Figure 10 is the ore body cranny development schematic diagram after the high pressure fracturing of horizontal parallel hole in embodiment；
Figure 11 is high-dipping ore block natural fissure schematic diagram (inclination crack) in embodiment；
Figure 12 is horizontal scallop hole layout drawing in embodiment；
Figure 13 is the ore body cranny development schematic diagram after horizontal scallop hole high pressure fracturing in embodiment.
【Description of reference numerals】
In figure：
1：Upper armor rock；
2：Lower wall country rock；
3：Ore body；
4：Natural fissure；
5：Fracturing hole；
6：Fracturing crack；
7：Drilling drift；
8：Cut slope laneway.
Embodiment
In order to preferably explain the present invention, in order to understand, below in conjunction with the accompanying drawings, by embodiment, to this hair
It is bright to be described in detail.
The natural caving method of the present invention, suitable for the mining that ore body is more firm than upper armor rock and lower wall country rock.
Reference picture 4 to Fig. 7, natural caving method of the invention comprises the following steps：
Artificial fracturing：According to geologic information, fractured zones rule and the stress distribution data on basis, to the ore body 3 of stope
Carry out artificial fracturing.
Wherein, basic geologic information and fractured zones rule are obtained by means of following steps：
Geologic prospect：Geologic prospect is carried out to stope, obtains the geologic information and fractured zones rule on basis.
Specifically, the mode of geologic prospect is one or more in ultrasonic wave, physical prospecting, micro seismic monitoring.
Geologic prospect is used for the collapsing property for assessing ore-rock.
Wherein, stress distribution data is obtained by means of following steps：
In-situ stress monitoring：Obtain stress distribution data.
Specifically, the mode of in-situ stress monitoring is to include hydraulic fracturing, acoustic-emission, rigid package body stress meter method.
In-situ stress monitoring is used to provide guidance for the laying in fracturing hole 5.
Above-mentioned geologic prospect and in-situ stress monitoring limit without order, and the two synthesis does theory for follow-up brill fracturing hole 5
Foundation and guidance.
Specifically, the mode of artificial fracturing is to apply high pressure to nugget by fracturing hole 5 to act on.
More specifically, it is high-pressure fluid and gases at high pressure by way of fracturing hole 5 applies high pressure effect to nugget.
A number of fracturing hole is beaten in the appropriate location of stope, high-pressure fluid, gases at high pressure etc. are injected by fracturing hole,
Cause ore body that crack, and continued development occurs under high pressure effect.
High-pressure fluid can be water, or other liquid.When horizontal high voltage fracturing is entered using high-pressure fluid, need
The special system for excluding liquid is set in stope, and by unnecessary liquid, (highly pressurised liquid is by the generation of artificial fracturing
Liquid) stope is excluded, ensure being normally carried out for subsequent production.
Or recovery tank body is set, unnecessary water is arranged using water under high pressure is counter, is reused.Specifically, will can reclaim
Tank body is set on construction ground, and reclaim tank body using Triple Valve with High Pressure goalkeeper is connected with frac system.In fracturing process, close
Tank body is reclaimed, recovery tank body is utilized into valve blocks with frac system；After the completion of pressure break, frac system is closed, tank body will be reclaimed
Connected with frac system using valve.After the completion of pressure break, the water in rock mass still has certain pressure, under pressure, stream
Body is flow in recovery tank body by rock mass, realizes the recovery and recycling of fluid.It is pointed out that recovery tank body not only limits to
It is equally applicable for gas fracturing or other fluid fr actures in hydrofracturing.
Above-mentioned fracturing hole 5 is obtained behind fracturing hole 5 again by applying to fracturing hole 5 by being drilled to obtain to ore body 3
High pressure so that the ore body 3 for forming fracturing hole 5 is acted on by high pressure, and ore body 3 produces fracturing crack 6 under high pressure effect, these causes
Crack 6 causes the solid coefficient of ore body 3 to reduce.
Specifically, the mode of artificial fracturing is high-voltage pulse fracturing.
Prerequisite steps：First fracturing region is tested, obtains the pulse of the region reignition (given voltage) 20 times
Fracturing range data, the fracturing scope under optimal discharge times N and the number is determined according to experiment.
Step 1：Bore fracturing hole 5 downwards from ground；
Step 2：The fracturing range data of the electric discharge n times obtained according to experiment, several regions, area are divided into by fracturing hole 5
The fracturing scope of domain number=fracturing hole depth/electric discharge n times；
Step 3：With the input and explosion-proof electrical source cabinet of flame-proof switch connection high electric field pulse generator；
Step 4：Using the positive output end and electric discharge positive pole of electrode cable connection high electric field pulse generator, negative electricity is used
The negative output terminal and electric discharge negative pole of cable connection high electric field pulse generator, foot of hole is pushed into by positive and negative electrode；
Step 5：Closure switch charge to electric pulse generator, when voltage reaches discharge voltage, are discharged, reignition
N times；
Step 6：After nethermost discharging regions reach n times, switch is disconnected, electrode is risen to upper one along fracturing hole 5
Individual region；
Step 7：Repeat step 1-6, until fracturing hole 5, whole stage discharge fracturings terminate.
Ore body is induced using artificial fracturing and forms high density reticulated cracks, the solid coefficient of ore is reduced, manually changes
Become the geological conditions of ore body, added the development degree in ore body crack, improve the collapsing property of ore body.
Compared prior art, and certain brand-new crack is generated on the means ore body 3 that this method passes through artificial fracturing
And/or cause natural fissure 4 further developed, these brand-new cracks and development after crack so that ore body 3 it is firm
Property coefficient reduces, and then causes ore body 3 to reach the use condition of free breakage, realizes free breakage exploitated ore.
In the present invention, realize that the ore body mine more firm than upper armor rock and lower wall country rock successfully uses the bar of natural caving method
Part is that the ore body 3 in the ore body mine more firm than upper armor rock and lower wall country rock is after artificial fracturing, the robustness system of ore body 3
For number less than the solid coefficients of upper armor rock 1 and lower wall country rock 2, i.e., the ore body 3 after fracturing is unsteady, and upper armor rock 1
It is firm with lower wall country rock 2.
In the present invention, optimal avalanche condition is that the ore body 3 after artificial fracturing is medium hard, and ore body 3 is with close
The joint and crack of collection, after undercuting to certain area can free breakage into the ore being of moderate size.
Monitoring fractures：Artificial fracturing region is monitored, obtains distribution and the expanded range in crack.
Specifically, the mode of monitoring fractures is microseism, sound hair ripple, ultrasonic wave, borehole camera, multipoint displacement meter and inclinometer
Middle one or more.
When the distribution in crack and expanded range do not reach optimal free breakage condition, then repetitive manual presplitting and crack are supervised
Survey, until being optimal free breakage condition when the distribution in crack and expanded range, terminate artificial presplitting and monitoring fractures.
When the distribution and expanded range that monitor crack do not reach optimal free breakage condition, then according to artificial fracturing step
The direction in fracturing hole arrange new fracturing hole according to demand, pass through the new artificial fracturing in fracturing hole afterwards so that produced in ore body
Raw reticulated cracks, realize that ore free breakage is exploited.
Free breakage：Ore body drops naturally.
Setting cuts slope laneway 8 and carries out avalanche boundary Control.Specifically, in order to control the border of free breakage, can utilize
Cut slope laneway 8 and realize control to avalanche border.Slope laneway 8 is cut more specifically, can set stage by stage, implementation phase avalanche
Boundary Control.
The arrangement form in fracturing hole 5 is lateral aperture, vertical holes and angling hole.The arrangement form in fracturing hole 5 depends on ground should
The developmental state and the regularity of distribution of power condition and natural fissure.The crack for being chosen so as to ore body of the arrangement form of fracturing hole 5
Development is faster defined.
Specifically, vertical holes include to vertical parallel hole, on to vertical scallop hole, lower to vertical parallel hole, lateral aperture
Include horizontal parallel hole, horizontal scallop hole again.
It is lower (to be drilled downwards from earth's surface) use condition to vertical parallel hole：
1. earth's surface allows drilling construction；2. orebody buried depth it is shallower (<500m).
The lower detailed process set to vertical parallel hole：
1st, fracturing design is carried out using the drilling of geologic prospect.
2nd, drill downwards and (have from earth's surface in the region for needing to carry out fracturing according to the fractured zones rule that geologic prospect obtains
Geotechnical boring is then utilized), as shown in Figure 5.
On to vertical parallel hole (from the bottom up-hole of mining phase) use condition：
1. earth's surface does not allow drilling construction；2. ore body bury it is relatively deep (>500m).
On to vertical parallel hole detailed process：
1st, four are tunneled in four edges of nugget and cuts side courtyard；
2nd, autotomy periphery driving of the side day bottom along nugget and cut slope laneway；
3rd, in slope laneway is cut, the drilling drift 7 of a sensible two lateral incisions slope laneway is tunneled at a certain distance, at every
Stamped at a certain distance in drilling drift 7 to vertical parallel hole or vertical scallop hole, as shown in Figure 6.
Lateral aperture use condition：
1st, existing engineering early stage is utilized, it is not necessary to which new digging drilling drift 7 bores lateral aperture；
2nd, when vertical holes can not complete fracturing target, it can newly dig drilling drift 7 and bore lateral aperture.
Lateral aperture sets detailed process：
1st, four are tunneled in four edges of nugget and cuts side courtyard；
2nd, the fractured zones rule obtained according to geologic prospect, opened in the correct position of location one for needing to carry out fracturing
The drilling drift 7 that side courtyard is cut in one insertion two of pick (if existing preliminary engineering can be used for drilling, need not newly dig chisel
Rock gangway road 7)；
3rd, horizontal parallel hole is beaten at a certain distance in every drilling drift 7, as shown in fig. 7, or horizontal scallop hole.
Angling hole use condition is when being unable to reach optimal fracturing effect using vertical holes or lateral aperture, is aided in tilt
Hole carries out fracturing.
The detailed process that angling hole is set：
1st, angling hole is bored in the region of needs using existing engineering；
2nd, the region for if desired beating angling hole does not have ready-made engineering, then digs a drilling drift 7 from engineering nearby
Carry out drilling construction.
The natural caving method of the present invention, the mine more firm than upper armor rock and lower wall country rock for ore body, compared to relatively upper disk
Country rock and lower wall country rock are than the mine that ore body consolidates, and the exploitation difficulty in the ore body mine more firm than upper armor rock and lower wall country rock is more
Greatly, it is embodied in the control of exploitation safety, production efficiency and cost of winning.
The natural caving method of the present invention, the solid coefficient for causing ore body 3 using artificial fracturing reduce, now, upper armor
Rock 1, lower wall country rock 2 are more firm than the ore body 3 after fracturing, utilize the border for cutting the control free breakage of slope laneway 8；When the ore deposit in border
The disequilibrium of body 3 undercuts to be formed after new balanced arch, repetitive manual fracturing and boundary Control, realizes free breakage quarry
Stone.
The natural caving method of the present invention, is caused original on the fractured zones and scope ratio nugget on nugget using artificial fracturing
Fractured zones and scope increase, reduce the solid coefficient of nugget, and then improve the collapsing property of nugget, realize ore
Free breakage.
The natural caving method of the present invention, it is that the back production of mineral can be achieved without using explosion, not only reduces concussion of blasting
Influence, and reduce the generation of explosion blasting fume, realize green high-efficient exploitation.
The natural caving method of the present invention, the ore body ore deposit more firm than upper armor rock and lower wall country rock is realized using artificial fracturing
The natural caving method exploitation on mountain, staff need not reduce the probability that accident occurs in exposed 1 time work of upper armor rock,
It ensure that safety in production.
The natural caving method of the present invention, the ore body ore deposit more firm than upper armor rock and lower wall country rock is realized using artificial fracturing
The natural caving method exploitation on mountain, eliminates the high expense of explosion, reduces the cost of mining, and then improve the economy in mine
Benefit, realize the economic exploitation.
The natural caving method of the present invention, the ore body ore deposit more firm than upper armor rock and lower wall country rock is realized using artificial fracturing
The natural caving method exploitation on mountain so that the bulk treatment progress during ore drawing shifts to an earlier date, and broken ore is controlled before back production
Lumpiness, avoid ore drawing blocking and second-time breakage problem.
To sum up, natural caving method of the invention is not only not present the ore body mine more firm than upper armor rock and lower wall country rock and existed
The problem of security incident rate is high in blasting excavation, cost of winning is high, and green high-efficient exploitation is realized, put in addition, avoiding
Ore deposit blocks and second-time breakage problem.
Reference picture 8 provides a specific implementation process of the invention by embodiment one to Figure 13.
Embodiment one
Certain inclination angle of iron ore mine ore body 3 is 60 °, and the thickness of ore body 3 is 40m, ore average grade 35%, and lump size is：Rank
The high 60m of section, nugget across pitch arrangement, wide 40m, long 50m.The lower wall country rock 2 of ore body 3 is rotten bittersweet sandstone, moderately stable, rock stratum
Protodyakonov coefficient f=4~5, upper armor rock 1 are dolomite-marble, are consolidated, Protodyakonov coefficient f=6~7, the Protodyakonov coefficient f=of ore body 3
7~8, ore body 3 and upper lower burrs rock contact region, ore-rock are extremely broken.
Implementation process using natural caving method of the present invention is as follows：
Step 1：Geologic prospect is carried out to stope using means such as ultrasonic wave, physical prospecting, micro seismic monitorings, obtains such as Fig. 8 and figure
The geologic information of original stope ore-rock cranny development data shown in 11 and other recovery process indispensability, assesses collapsing for ore-rock
Property, and according to the progress of the work of the data of acquisition guidance brill fracturing hole 5；
Step 2：In-situ stress monitoring is carried out, obtains stress distribution data, guidance is provided to bore the work of fracturing hole 5；
Step 3：In the place that the fractured zones of original stope ore-rock are horizontal fissure, i.e., working face as shown in Figure 8,
A number of horizontal parallel hole is beaten, as shown in figure 9, then using high-pressure fluid, gases at high pressure, high-voltage pulse and aqueous vapor coupling
The modes such as conjunction carry out artificial presplitting to ore body 3, the solid coefficient of ore-rock are reduced, so as to change ferrous metal mine ore body 3
Collapsing property, its ore-rock is set to realize free breakage；
It is the place in inclination crack in the fractured zones of original stope ore-rock, i.e., working face as shown in figure 11, beats certain
The horizontal scallop hole of quantity, as shown in figure 12, then using high-pressure fluid, gases at high pressure, high-voltage pulse and water-gas coupling etc.
Mode carries out artificial presplitting to ore body 3, reduces the solid coefficient of ore-rock, so as to change collapsing for ferrous metal mine ore body 3
Property, its ore-rock is realized free breakage；
Step 4：Using microseism, ultrasonic wave, borehole camera, multipoint displacement meter and inclinometer etc. to the artificial presplitting of stope
Region carries out system monitoring, obtains distribution and the expanded range in crack, as depicted in figure 10 and figure 13, it is determined that artificial presplitting effect is
It is no to reach the optimal conditions of free breakage, if meeting the optimal conditions of free breakage, exploited, if not meeting optimal avalanche
Condition, then position and the quantity in new round fracturing hole 5, horizontal high voltage fracturing of going forward side by side are determined according to the fractured zones situation of acquisition.
According to the geological conditions in mine and the occurrence condition of ore body 3, it is not appropriate for being exploited using natural caving method originally,
Pass through the technology of the application present invention, it is possible to achieve exploited using natural caving method.
Above content is only presently preferred embodiments of the present invention, for one of ordinary skill in the art, according to the present invention's
Thought, there will be changes, this specification content should not be construed as to the present invention in specific embodiments and applications
Limitation.
Claims (11)
1. a kind of natural caving method, it is characterised in that the mine more firm than upper armor rock and lower wall country rock suitable for ore body, it includes
Following steps：
Artificial fracturing：According to geologic information, fractured zones rule and the stress distribution data on basis, pedestrian is entered to the ore body of stope
It is exquisite to split；
Monitoring fractures：Artificial fracturing region is monitored, obtains distribution and the expanded range in crack；
Free breakage：Ore body drops naturally.
2. natural caving method according to claim 1, it is characterised in that
The basic geologic information and fractured zones rule are obtained by means of following steps：
Geologic prospect：Geologic prospect is carried out to stope, obtains the geologic information and fractured zones rule on basis；
The stress distribution data is obtained by means of following steps：
In-situ stress monitoring：Obtain stress distribution data.
3. natural caving method according to claim 1, it is characterised in that
When the distribution in crack and expanded range do not reach optimal free breakage condition, then repetitive manual presplitting and monitoring fractures, directly
It is optimal free breakage condition to when the distribution in crack and expanded range, terminates artificial presplitting and monitoring fractures.
4. natural caving method according to claim 1, it is characterised in that
In artificial fracturing step：
The mode of artificial fracturing is to apply high pressure to nugget by fracturing hole to act on.
5. natural caving method according to claim 4, it is characterised in that
It is high-pressure fluid and gases at high pressure by way of fracturing hole applies high pressure effect to nugget.
6. natural caving method according to claim 1, it is characterised in that
In artificial fracturing step：
The mode of artificial fracturing is high-voltage pulse fracturing.
7. the natural caving method according to claim 4 or 6, it is characterised in that
The arrangement form in fracturing hole is lateral aperture, vertical holes and angling hole.
8. the natural caving method according to claim 4 or 6, it is characterised in that
In free breakage step：
Setting cuts slope laneway 8 and carries out avalanche boundary Control.
9. natural caving method according to claim 1, it is characterised in that
In geologic prospect step：
The mode of geologic prospect is one or more in ultrasonic wave, physical prospecting, micro seismic monitoring.
10. natural caving method according to claim 1, it is characterised in that
In in-situ stress monitoring step：
The mode of in-situ stress monitoring is to include hydraulic fracturing, acoustic-emission, rigid package body stress meter method.
11. natural caving method according to claim 1, it is characterised in that
In monitoring fractures step：
The mode of monitoring fractures is a kind of or more in microseism, sound hair ripple, ultrasonic wave, borehole camera, multipoint displacement meter and inclinometer
Kind.
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| CN109026004A (en) * | 2018-08-07 | 2018-12-18 | 中国恩菲工程技术有限公司 | The preprocess method of ore-rock |
| CN109827694A (en) * | 2019-03-22 | 2019-05-31 | 中国电建集团华东勘测设计研究院有限公司 | The earth stress measuring method of preset ARTIFICIAL CRACK under the conditions of a kind of ultra-deep is buried |
| CN110173247A (en) * | 2019-05-19 | 2019-08-27 | 中铁十九局集团矿业投资有限公司 | A kind of Roof Control fracturing process of soft broken top plate ore body back production |
| CN112096385A (en) * | 2019-06-02 | 2020-12-18 | 南京梅山冶金发展有限公司 | Natural caving mining method for static cracking and crushing of thick and large metal ore body |
| CN113047835A (en) * | 2021-02-24 | 2021-06-29 | 中南大学 | Deep well thick and large ore body mining method integrating emptying, caving and filling |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108518223A (en) * | 2018-02-11 | 2018-09-11 | 中冶北方（大连）工程技术有限公司 | A kind of vertical long hole spheric cartridge falls mine method |
| CN109026004A (en) * | 2018-08-07 | 2018-12-18 | 中国恩菲工程技术有限公司 | The preprocess method of ore-rock |
| CN109827694A (en) * | 2019-03-22 | 2019-05-31 | 中国电建集团华东勘测设计研究院有限公司 | The earth stress measuring method of preset ARTIFICIAL CRACK under the conditions of a kind of ultra-deep is buried |
| CN110173247A (en) * | 2019-05-19 | 2019-08-27 | 中铁十九局集团矿业投资有限公司 | A kind of Roof Control fracturing process of soft broken top plate ore body back production |
| CN112096385A (en) * | 2019-06-02 | 2020-12-18 | 南京梅山冶金发展有限公司 | Natural caving mining method for static cracking and crushing of thick and large metal ore body |
| CN113047835A (en) * | 2021-02-24 | 2021-06-29 | 中南大学 | Deep well thick and large ore body mining method integrating emptying, caving and filling |
| CN113047835B (en) * | 2021-02-24 | 2022-04-15 | 中南大学 | Deep well thick and large ore body mining method integrating emptying, caving and filling |
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