CN106761757A - A kind of full stage combination chisel it is quick-fried fall the efficient mining methods of ore deposit - Google Patents

A kind of full stage combination chisel it is quick-fried fall the efficient mining methods of ore deposit Download PDF

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Publication number
CN106761757A
CN106761757A CN201611118117.5A CN201611118117A CN106761757A CN 106761757 A CN106761757 A CN 106761757A CN 201611118117 A CN201611118117 A CN 201611118117A CN 106761757 A CN106761757 A CN 106761757A
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China
Prior art keywords
ore
mineral building
diameter
shaped medium
quick
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CN201611118117.5A
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Chinese (zh)
Inventor
饶运章
彭立正
王正英
朱军
黄苏锦
段小华
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HUNAN LIANSHAO CONSTRUCTION ENGINEERING (GROUP) Co Ltd
JIANGXI COPPER INDUSTRY GROUP DONGTONG MINING INDUSTRY Co Ltd
Linyi Huibaoling Iron Mine Co Ltd
Jiangxi University of Science and Technology
Original Assignee
HUNAN LIANSHAO CONSTRUCTION ENGINEERING (GROUP) Co Ltd
JIANGXI COPPER INDUSTRY GROUP DONGTONG MINING INDUSTRY Co Ltd
Linyi Huibaoling Iron Mine Co Ltd
Jiangxi University of Science and Technology
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Application filed by HUNAN LIANSHAO CONSTRUCTION ENGINEERING (GROUP) Co Ltd, JIANGXI COPPER INDUSTRY GROUP DONGTONG MINING INDUSTRY Co Ltd, Linyi Huibaoling Iron Mine Co Ltd, Jiangxi University of Science and Technology filed Critical HUNAN LIANSHAO CONSTRUCTION ENGINEERING (GROUP) Co Ltd
Priority to CN201611118117.5A priority Critical patent/CN106761757A/en
Publication of CN106761757A publication Critical patent/CN106761757A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C41/00Methods of underground or surface mining; Layouts therefor
    • E21C41/16Methods of underground mining; Layouts therefor
    • E21C41/22Methods of underground mining; Layouts therefor for ores, e.g. mining placers

Abstract

The invention discloses a kind of full stage combination chisel it is quick-fried fall the efficient mining methods of ore deposit, mineral building bottom is provided with level haulageway, ore removal route, Undercut tunnel;Ore removal route as full stage broken ore haulage passage;Undercut tunnel as bottom fan shaped medium length hole construction space, upward Drilling fan shaped medium length hole, after explosion formed moat ditch undercut;In mineral building side or middle by large diameter, deep borehole onepull formation slot raise, then cutting groove is formed by slot raise, as ore caving compensation space;Mineral building top is provided with and wears the logical drilling chamber of pulse-phase or tunnel, used as the construction space of top large diameter, deep borehole;Large diameter, deep borehole combines rock drilling with the fan shaped medium length hole of bottom;Large diameter, deep borehole is punchinged after finishing with fan shaped medium length hole, with cutting groove as the scope of freedom, combination or respectively charge explosion lateral caving.The present invention is adopted and cuts that quantities is small, and back production time significantly reduces, and mineral building production capacity is big, investment reduction cost.

Description

A kind of full stage combination chisel it is quick-fried fall the efficient mining methods of ore deposit
Technical field
The present invention relates to mineral deposit underground mining technologies field, specifically a kind of full stage combination chisel it is quick-fried fall the efficient side of mining of ore deposit Method.
Background technology
Inclined or high-dipping, the production capacity of middle thick above ore body, efficiency and sheet to improve underground mine exploitation Matter safety, frequently with sub-level primary stoping, sublevel drilling block chambering method and VCR methods.But sub-level primary stoping be by divided stages into Multiple is segmented and each segmentation has independent ore removal structure, and sublevel drilling block chambering method is also that divided stages are segmented into multiple Driling explosion and stage ore removal, VCR rules need tunneling boring to pull open bottom and the hole depth to rig, deviation proportion and ore-rock stability It is required that high, the common drawback of three kinds of methods is to adopt that to cut quantities big.Therefore, invention one kind not only omits segmentation engineering but also realizes rank Section bottom V-type Trench ore-drawing (being pulled open without bottom tunneling boring) and to rig performance and the ore-rock stability lower full rank of requirement Duan Zuhe chisel it is quick-fried fall the efficient mining technique of ore deposit.
The content of the invention
It is an object of the invention to provide a kind of full stage combination chisel it is quick-fried fall the efficient mining methods of ore deposit, to solve above-mentioned background The problem proposed in technology.
To achieve the above object, the present invention provides following technical scheme:
Full stage combination chisel it is quick-fried fall the efficient mining methods of ore deposit (Full-Staged Combination Drilling with Blasting Mining, abbreviation FCM method), comprise the following steps:
(1) mineral building structural parameters:It is assumed that mineral building arranges (also can capwise arrange) along orebody trend, mineral building length 50~ 60m, 60~80m of level interval, 8~20m of ore body mean breadth;
(2) quasi- cutting is adopted:Mineral building bottom is provided with level haulageway, ore removal route, Undercut tunnel;Ore removal route is made It is the haulage passage of full stage broken ore;Bored upwards as the construction space of the fan shaped medium length hole of bottom in Undercut tunnel Chisel fan shaped medium length hole, forms moat ditch and undercuts after explosion;In mineral building side or middle by large diameter, deep borehole shaft formatting by one blasting Technology forms slot raise, then forms cutting groove by slot raise, used as ore caving compensation space;Mineral building top is provided with and wears pulse-phase Logical drilling chamber or tunnel, as the construction space of top large diameter, deep borehole;
(3) back production:In bottom, the moat ditch tunnel that undercuts digs pick fan shaped medium length hole upwards, and fan shaped medium length hole changes regarding Ore body morphology Carry out depth adjustment, but its of length no more than 25m;At top, drilling chamber digs downwards pick large diameter, deep borehole, and large diameter, deep borehole inclines Rake angle is approximately parallel to the slanting angle of ore body, and rock drilling, and large diameter, deep borehole and fan shaped medium length hole are combined with the fan shaped medium length hole of bottom Between be provided with the ore-rock of 0.8-1.2m;Large diameter, deep borehole is punchinged after finishing with fan shaped medium length hole, with cutting groove as the scope of freedom, combination Or respectively charge explosion lateral caving, mineral building bottom use scraper ore removal, carried out again after explosion mineral building concentrate Contining ore removal with And dead zone backfilling working.
As further scheme of the invention:Mineral building 54m long, stage 70m high, ore body mean breadth 16m.
As further scheme of the invention:Escape way (wearing arteries and veins) is additionally provided with drilling chamber.
As further scheme of the invention:Level haulageway is apart from ore body 25m.
As further scheme of the invention:Ore removal route spacing 15m.
As further scheme of the invention:Fan shaped medium length hole is shaped as sector, and aperture is 76mm, array pitch 1.6m, hole Bottom is away from 1.8m.
As further scheme of the invention:The aperture of large diameter, deep borehole is 165mm, and large diameter, deep borehole angle of inclination is approximate Parallel to the slanting angle of ore body, array pitch 2.8m, pitch-row 2.5m.
Compared with prior art, the beneficial effects of the invention are as follows:
The full stage mineral building of present invention arrangement, segmentation is no longer set up in centre, but in mineral building bottom ore, makes full use of bottom Trenching tunnel, chisel pick fan shaped medium length hole, at the top of mineral building, sets drilling chamber upwards, the large diameter, deep borehole 2 of chisel pick downwards, deep hole Rock drilling is combined with medium-length hole, as the scope of freedom, hybrid laterolog explosion inverted trapezoidal formula collapses the cutting groove with mineral building side or middle digging Fall whole mineral building ores.Compared with sublevel open stope method, the full section quick-fried mining codes of combination chisel high need not dig sublevel drilling tunnel and complete Section undercuts, and only in bottom chisel pick fan shaped medium length hole and top chisel pick deep hole, adopts and cuts that quantities is small, and rig drilling efficiency is high, returns Adopting time significantly reduces, and mineral building production capacity is big.Compared with vertical parallel deep hole VCR methods, due to deep in the sector of bottom The presence in hole, top chisel pick deep hole length can be shortened, drilling difficulty reduction, and in terms of irregular ore body's exploitation, loss and Dilution index is more excellent;Compared with vertical fan-shaped deep hole VCR methods, the method drilling efficiency is higher, can arrange tall and big mineral building, produces energy Power is big, and it is few that what ore per ton was spread out adopts quasi- quantities.Mining codes of the present invention are than each mineral building of sublevel rock drilling phase room mining technology Development heading 37.5% can be saved, can 14.46 yuan/ton of investment reduction, can save mining 64.22 yuan/ton of integrated cost.
Brief description of the drawings
Fig. 2 is present invention experiment mineral building schematic diagram;
Fig. 1 is the front view of Fig. 2;
Fig. 3 is the top view of Fig. 2;
Fig. 4 is FCM mining codes -340m level schematic diagrams in embodiment 1;
Fig. 5 is FCM mining codes -410m level schematic diagrams in embodiment 1;
Fig. 6 is sublevel rock drilling phase room mining technology -340m level schematic diagrams in embodiment 1;
Fig. 7 is sublevel rock drilling phase room mining technology -364m level schematic diagrams in embodiment 1;
Fig. 8 is sublevel rock drilling phase room mining technology -387m level schematic diagrams in embodiment 1;
Fig. 9 is sublevel rock drilling phase room mining technology -410m level schematic diagrams in embodiment 1;
In figure:1- slot raises, 2- large diameter, deep boreholes, 4- fan shaped medium length holes, 5- moat ditches undercut tunnel, 6- ore removals route, 7- drilling chambers, 8- level haulageways, 9- cuttings crosscut, 10- sublevel drillings tunnel, 11- segmentations drift, 12- wear arteries and veins Tunnel
Specific embodiment
Below in conjunction with the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, Obviously, described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based in the present invention Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all Belong to the scope of protection of the invention.
Embodiment 1
Refer to Fig. 1-5, in the embodiment of the present invention, full stage combination chisel it is quick-fried fall the efficient mining methods of ore deposit, including following step Suddenly:
(1) mineral building structural parameters:It is assumed that mineral building is arranged along orebody trend, mineral building 50~60m long (experiment mineral building takes 54m), Stage 60~80m high (experiment mineral building takes 70m), 8~20m of ore body mean breadth (experiment mineral building takes 16m).
(2) quasi- cutting is adopted:Mineral building bottom is provided with level haulageway 8 (apart from ore body 25m), (spacing of ore removal route 6 15m), Undercut tunnel 5 etc.;Undercut tunnel 5 as the fan shaped medium length hole 4 of bottom construction space, upward Drilling fan Shape medium-length hole 4, forms moat ditch and undercuts after explosion.In mineral building side or middle by the onepull of large diameter, deep borehole 2 into cutting Courtyard 1, then cutting groove is formed by slot raise 1, as ore caving compensation space.Mineral building top is provided with drilling chamber (or rock drilling lane Road) 7, as the construction space of top large diameter, deep borehole 2.Drilling chamber 7 is communicated with arteries and veins 12 is worn.
(3) back production:In bottom moat ditch undercut tunnel dig upwards pick aperture for 76mm medium-length hole 4, medium-length hole 4 for sector, Array pitch 1.6m, bottom hole pitch 1.8m, fan shaped medium length hole 4 carry out depth adjustment depending on Ore body morphology change, to ensure loss and dilution index, But its length is not to be exceeded 25m, in order to avoid there is bulk;At top, chisel pick aperture is the large-diameter deep of 165mm to drilling chamber 7 downwards Hole 2, the angle of inclination of large diameter, deep borehole 2 is approximately parallel to the slanting angle of ore body, deep in array pitch 2.8m, pitch-row 2.5m, with the sector of bottom The ore-rock that 1m or so is provided between rock drilling, but large diameter, deep borehole 2 and fan shaped medium length hole 4 is combined in hole 4, prevents upper and lower deep hole insertion. Large diameter, deep borehole is punchinged after finishing with fan shaped medium length hole, using cutting groove as the scope of freedom of later lateral caving, is combined or difference Charge explosion lateral caving, by the control to ore caving interval come controlled blasting scale, the appropriate ore removal in mineral building bottom, it is therefore an objective to protect Demonstrate,prove stope stability and polycrystalline substance it is complete, using scraper ore removal, mineral building explosion carries out full mineral building concentration again after terminating Contining ore removal and dead zone backfilling working.
Described in concrete condition following examples.
1st, mine overview is implemented
Hui Bao ridges iron ore is located at Linyi.Ore body is located in the Cao Yuzu stratum of Archaean group Taishan Group Complex mountain, is passed through The ore body situation for having disclosed confirms and geologic information analysis that ore body preservation is relatively stablized, orebody thickness 10m~17m, average thickness 16m or so, 70 °~88 ° of the slanting angle of ore body.Roof and floor enclosing lithologies are black clouds granulite, black clouds hornblende schist, whole mine belt rock It is I~III grade of rock mass for more complete to complete.Ore body roof and ore body rock quality designation RQD values average 70%, rock mass is complete Medium, the ore body floor rock quality index RQD values average 80% of property, it can be seen that ore body roof and floor rock mass is more complete, stability Preferably.Rock is hard, and rock saturation 68.1~122.1MPa of compression strength, 6.16~17.5MPa of shearing strength, rock mechanics is strong Degree is higher, is hard rock class, ore hardness coefficient f=15~18, ore proportion 3.49t/m3, the coefficient of volumetric expansion is 1.6.Rock is hard Degree coefficient f=7~18, Rock Specific Gravity 2.7t/m3, the coefficient of volumetric expansion is 1.6.Ore average grade TFe30.26%, MFe17.98%.Water yield is less than 20m3/ h, engineering geology, hydrogeologic condition are simpler.The experiment mineral building choosing of FCM mining codes In -410m levels~-340m levels south wing S1 ore bodies.
2nd, FCM mining codes
(FCM mining codes three-view diagrams shown in Fig. 1~3:Fig. 1-front view, Fig. 2-side view, Fig. 3-top view) ,-410m Horizontally disposed level haulageway 8, Chuan Mai tunnels 12, moat ditch undercut tunnel 5 (i.e. drilling drift 10), ore removal route 6, cutting day The grade development heading of well 1.
Shown in Fig. 4, the development heading such as the horizontally disposed level haulageways 8 of -340m, Chuan Mai tunnels 12, drilling chamber 7.
Each nugget length of FCM mining codes 60m, level interval 70m.In the horizontal ore body lower wall arrangement stage transports of -410m Away from ore body about 25m, arrangement moat ditch undercuts the average about 60m in tunnel 5 (i.e. drilling drift 10), four ore removal routes 6 in ore body in tunnel 8 Every length 25m.
3rd, sublevel open stoping afterwards filling method
Hui Bao ridges iron ore original mining methods are sublevel drilling stage mineral building afterwards filling method, -340m levels to -410m levels Between be divided into three segmentations, i.e. -364m levels, -387m levels, -410m levels, be segmented 23~24m high.The cloth in each segmentation Put fragmented transport tunnel 11 (- 410m levels are level haulageway 8), Chuan Mai tunnels 9, segmentation chisel tunnel 10, Undercut lane Road 5 and slot raise 1.
Each segmentation roadway layout is as shown in Fig. 6~9.
Sublevel drilling stage each nugget length of mineral building afterwards filling method 60m, level interval 70m, are segmented drift 11 The average about 60m in chisel tunnel 10 is segmented in ore body.Four ore removal routes 6, center spacing are arranged in the horizontal ore body lower walls of -410m 15m, every length 25m.
4th, goaf filling
Finished in mineral building back production, after ore transports stope, in each porch building concrete barricade in goaf, then enter end of line Sand, waste filling.Because the entrance that FCM mining codes lead to goaf is less, therefore filling cost is also less.
5th, quasi- quantities contrast is adopted
FCM mining codes are identical with sublevel rock drilling phase room mining technology nugget parameter, with the 60m long of Chuan Mai tunnels 12, ore body Width 16m is calculated and is adopted quasi- cutting quantities.
The excavation work amount of FCM mining codes and sublevel rock drilling phase room mining technology is to such as table 1:
Table 1FCM mining codes analyze contrast with sublevel rock drilling phase room mining technology driving amount
6th, economic efficiency contrast
Two kinds of developings of mining methods are compared in units of 1 mineral building in table, quasi- excavation work amount is adopted.Sublevel drilling rank The design length of Chuan Mai tunnels 12 of section mineral building mining codes is calculated between 55~80m, herein and is defined by 60m.Returnairshaft connection roadway, North and south contact Chuan Mai, adopt after quasi- ramp each level takes total length, share to single mineral building and calculate.Thus analytical calculation understands Single mineral building can reduce tunnelling 405m when using FCM mining codes, altogether 5620.4m3.Wherein along the pulse quasi- ramp, is adopted to subtract 144m, 2188.8m are tunneled less3, by 463 yuan/m of contract cost3Calculate, can 101.3 ten thousand yuan of investment reduction;Wear arteries and veins, returnairshaft contact Reduce driving 261m, 3431.6m in the tunnels such as lane3, it is 379.2 yuan/m by contract cost3Calculate, can 130.1 ten thousand yuan of investment reduction. Add up to single mineral building can 231.4 ten thousand yuan of investment reduction, embodiment mineral building ore deposit amount is about 160,000 tons, then averagely can investment reduction 14.46 yuan/ton.
The present invention by the moat ditch of mineral building bottom undercut tunnel upward Drilling fan shaped medium length hole 4, mineral building top drilling chamber (or Tunnel) downward Drilling large diameter, deep borehole 2, combines rock drilling and not only omits segmentation engineering but also reduce deep hole depth and deviation proportion, group up and down Close explosion and greatly improve production capacity, V-type ore removal moat ditch is formed after bottom sector medium-length hole blasting, all stoping works all exist Operation in tunnel, realizes mine essential safety.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, Er Qie In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be in other specific forms realized.Therefore, no matter From the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is by appended power Profit requires to be limited rather than described above, it is intended that all in the implication and scope of the equivalency of claim by falling Change is included in the present invention.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each implementation method is only wrapped Containing an independent technical scheme, this narrating mode of specification is only that for clarity, those skilled in the art should Specification an as entirety, the technical scheme in each embodiment can also be formed into those skilled in the art through appropriately combined May be appreciated other embodiment.

Claims (7)

1. a kind of full stage combination chisel it is quick-fried fall the efficient mining methods of ore deposit, it is characterised in that comprise the following steps:
(1) mineral building structural parameters:It is assumed that mineral building arranges (also can capwise arrange) along orebody trend, 50~60m of mineral building length, 60~80m of level interval, 8~20m of ore body mean breadth;
(2) quasi- cutting is adopted:Mineral building bottom is provided with level haulageway, ore removal route, Undercut tunnel;Ore removal route is used as complete The haulage passage of stage broken ore;Undercut tunnel as the fan shaped medium length hole of bottom construction space, upward Drilling fan Shape medium-length hole, forms moat ditch and undercuts after explosion;In mineral building side or middle by large diameter, deep borehole shaft formatting by one blasting technology Slot raise is formed, then cutting groove is formed by slot raise, as ore caving compensation space;Mineral building top is provided with and wears what pulse-phase led to Drilling chamber or tunnel, as the construction space of top large diameter, deep borehole;
(3) back production:In bottom, the moat ditch tunnel that undercuts digs pick fan shaped medium length hole upwards, and fan shaped medium length hole is carried out depending on Ore body morphology change Depth is adjusted, but its of length no more than 25m;At top, drilling chamber digs downwards pick large diameter, deep borehole, large diameter, deep borehole inclination angle Degree is approximately parallel to the slanting angle of ore body, is combined between rock drilling, and large diameter, deep borehole and fan shaped medium length hole with the fan shaped medium length hole of bottom It is provided with the ore-rock of 0.8-1.2m;Large diameter, deep borehole is punchinged after finishing with fan shaped medium length hole, with cutting groove as the scope of freedom, is combined or is divided Other charge explosion lateral caving, mineral building bottom uses scraper ore removal, carries out mineral building after explosion again and concentrates Contining ore removal and sky Area's backfilling working.
2. full stage combination chisel according to claim 1 it is quick-fried fall the efficient mining methods of ore deposit, it is characterised in that mineral building 54m long, Stage 70m high, ore body mean breadth 16m.
3. full stage combination chisel according to claim 1 it is quick-fried fall the efficient mining methods of ore deposit, it is characterised in that on drilling chamber It is additionally provided with escape way (wearing arteries and veins).
4. full stage combination chisel according to claim 1 it is quick-fried fall the efficient mining methods of ore deposit, it is characterised in that stage transportation roadway Track pitch is from ore body 25m.
5. full stage combination chisel according to claim 1 it is quick-fried fall the efficient mining methods of ore deposit, it is characterised in that between ore removal route Away from 15m.
6. full stage combination chisel according to claim 1 it is quick-fried fall the efficient mining methods of ore deposit, it is characterised in that fan shaped medium length hole Be shaped as sector, aperture is 76mm, array pitch 1.6m, bottom hole pitch 1.8m.
7. full stage combination chisel according to claim 1 it is quick-fried fall the efficient mining methods of ore deposit, it is characterised in that large diameter, deep borehole Aperture be 165mm, large diameter, deep borehole angle of inclination is approximately parallel to the slanting angle of ore body, array pitch 2.8m, pitch-row 2.5m.
CN201611118117.5A 2016-12-07 2016-12-07 A kind of full stage combination chisel it is quick-fried fall the efficient mining methods of ore deposit Pending CN106761757A (en)

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CN107035372A (en) * 2017-06-09 2017-08-11 临沂会宝岭铁矿有限公司 A kind of moat ditch formula polycrystalline substance enters trackside peak abutment post recovery method
CN108316927A (en) * 2018-02-02 2018-07-24 长沙矿山研究院有限责任公司 A kind of stage Contining ore removal filling mining method
CN108343438A (en) * 2018-01-18 2018-07-31 武汉理工大学 A kind of inclined orebody varied angle Trench ore-drawing mining methods
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
CN109322683A (en) * 2018-10-24 2019-02-12 临沂会宝岭铁矿有限公司 Underground Large chamber medium-length hole controls blasting construction method
CN109989754A (en) * 2018-10-12 2019-07-09 安徽铜冠(庐江)矿业有限公司 Ultra-large stope large diameter, deep borehole high-stage open stope afterwards filling mining method and application
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CN111058847A (en) * 2019-12-13 2020-04-24 中南大学 Continuous large-aperture deep hole blasting mechanized mining method for thick and large ore body
CN111520141A (en) * 2020-03-19 2020-08-11 安徽金日晟矿业有限责任公司 Deep hole arrangement process for stope recovery in two-step stope

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107035372A (en) * 2017-06-09 2017-08-11 临沂会宝岭铁矿有限公司 A kind of moat ditch formula polycrystalline substance enters trackside peak abutment post recovery method
CN108343438A (en) * 2018-01-18 2018-07-31 武汉理工大学 A kind of inclined orebody varied angle Trench ore-drawing mining methods
CN108343438B (en) * 2018-01-18 2019-10-25 武汉理工大学 A kind of inclined orebody varied angle Trench ore-drawing mining methods
CN108316927A (en) * 2018-02-02 2018-07-24 长沙矿山研究院有限责任公司 A kind of stage Contining ore removal filling mining method
CN108316927B (en) * 2018-02-02 2019-11-19 长沙矿山研究院有限责任公司 A kind of stage Contining ore removal filling mining method
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
CN109989754A (en) * 2018-10-12 2019-07-09 安徽铜冠(庐江)矿业有限公司 Ultra-large stope large diameter, deep borehole high-stage open stope afterwards filling mining method and application
CN109322683A (en) * 2018-10-24 2019-02-12 临沂会宝岭铁矿有限公司 Underground Large chamber medium-length hole controls blasting construction method
CN111005720A (en) * 2019-11-22 2020-04-14 铜陵有色金属集团股份有限公司 Mining method for combined application of multiple apertures of medium-thickness ore body inclined to gentle dip
CN111058847A (en) * 2019-12-13 2020-04-24 中南大学 Continuous large-aperture deep hole blasting mechanized mining method for thick and large ore body
CN111520141A (en) * 2020-03-19 2020-08-11 安徽金日晟矿业有限责任公司 Deep hole arrangement process for stope recovery in two-step stope

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