CN105822307A - Underhand sublevel open stoping method - Google Patents

Underhand sublevel open stoping method Download PDF

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Publication number
CN105822307A
CN105822307A CN201610252629.4A CN201610252629A CN105822307A CN 105822307 A CN105822307 A CN 105822307A CN 201610252629 A CN201610252629 A CN 201610252629A CN 105822307 A CN105822307 A CN 105822307A
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CN
China
Prior art keywords
ore
under
sublevel
segmentation
stoping
Prior art date
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Pending
Application number
CN201610252629.4A
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Chinese (zh)
Inventor
雷明礼
张海磊
刘武团
严文炳
陈小平
焦满岱
柴衡山
孟慧媚
张睿
刘涛
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Northwest Research Institute of Mining and Metallurgy
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Northwest Research Institute of Mining and Metallurgy
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Application filed by Northwest Research Institute of Mining and Metallurgy filed Critical Northwest Research Institute of Mining and Metallurgy
Priority to CN201610252629.4A priority Critical patent/CN105822307A/en
Publication of CN105822307A publication Critical patent/CN105822307A/en
Pending legal-status Critical Current

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Classifications

    • 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 relates to the technical field of stoping methods and particularly relates to an underhand sublevel open stoping method. The underhand sublevel open stoping method comprises the following steps: firstly, arranging an ore block along the direction of an ore body and dividing the ore block into an ore room and an ore column; dividing the ore block into 3-5 sublevels in the vertical direction, wherein each sublevel is 8m-12m high; arranging an access along the extending direction, and carrying out retreating stoping from two ends to the center of the ore body; under the protection of a support pillar, carrying out sublevel stoping in sequence from top to bottom; carrying out layered ore drawing by adopting a scraper end part ore drawing manner; carrying out ore drawing under an upper sublevel ore coverage layer at an upper sublevel; and after whole ore room stoping is finished, collapsing the support pillar, and releasing support pillar ores and open stope residual ores from a bottom funnel. The method is flexible, has rapid effect and integrates advantages of a non-pillar sublevel caving method and a sub-level room stoping method, and a new process is provided for recycling medium-stable and medium-thick ore bodies.

Description

To sublevel open stope method under one
Technical field
The invention belongs to mining methods technical field, be specifically related under one to sublevel open stope method.
Background technology
In traditional method back production when steady middle thick inclination or high-dipping ore block, generally use sublevel caving method without sill pillar or block chambering method.But, sublevel caving method without sill pillar can be in the front dilution during lower wall produces the loss of substantial amounts of chassis and ore removal;And block chambering method need to be adopted at whole nugget and just carry out back production after cut journey completes, sometimes preparing block chambering method stope needs the time of 2 years, causes overstocking of substantial contribution and ore deposit amount.It is therefore desirable to find a kind of new mining methods, this mining methods can comprehensive bottom-column-free sectional caving stoping method and advantage of block chambering method, in steady middle thickness orebody reclaim and add new technique.
Summary of the invention
It is an object of the invention to provide the inclination of steady middle thickness in a kind of being applied to or the lower to openstope method of high-dipping ore block.
For achieving the above object, the present invention provides following technical scheme:
To sublevel open stope method under one, these mining codes include adopting quasi-cutting, back production falls ore deposit and ore removal step, specifically include:
A () adopts quasi-cutting: along orebody trend each layout nugget, nugget width 50-80m, high 40-60m;Nugget is divided into mineral building and ore pillar, and ore pillar includes the discontinuous irregular studding that fore-set thick for 8-12m, foundation thick for 6-10m and length direction stay;And nugget is divided in vertical direction 3-5 segmentation, segmentation height 8-12m;Lower wall is used to adopt Barebone;
B () back production falls ore deposit: across pitch arranges route; use fan-shaped row medium-length hole ore blast, carry out under barnyard without tight-face blasting or under limited Ore cover layer, carry out end wall local compression explosion, from ore body two ends to central authorities' drawing back; under the protection of fore-set, substoping the most successively;
(c) ore removal: layering ore removal uses scraper end ore removal way, and lower segmentation is ore removal under upper segmentation Ore cover layer;After whole mineral building back production terminates, avalanche fore-set, fore-set Ore and barnyard residual Ore are released in the funnel of bottom.
Preferably, the position of the discontinuous irregular studding stayed at the length direction of (a) step and specification should design according to each segmentation grade and thickness situation of change.
Preferably, adopt after cut journey completes in the segmentation of (a) step, (b), the work of (c) step can be carried out in this segmentation.
Preferably, when there is dangerous situation when barnyard in (b) step, can avalanche fore-set immediately, become bottom-column-free sectional caving stoping method exploitation, now, in (c) step, fore-set Ore and barnyard residual Ore can be as the sealing coats of waste rock overburden.
Compared with prior art, the invention has the beneficial effects as follows:
Adopt, a segmentation, the ore deposit ore removal that can fall after cut journey completes to openstope method under the present invention, can limit Cai Zhun limit back production, adopt the block chambering method just carrying out back production after cut journey completes compared to whole nugget, have maneuverability, avoid fund overstock etc. advantage;Present invention ore removal under barnyard simultaneously, avoid the shortcoming that the bottom-column-free sectional caving stoping method rate of dilution is high, even if there is dangerous situation in midway barnyard, avalanche fore-set is changed into bottom-column-free sectional caving stoping method exploitation, fore-set Ore and barnyard residual Ore can be as the sealing coats of waste rock overburden, and ore removal effect is still better than general bottom-column-free sectional caving stoping method.
Accompanying drawing explanation
Fig. 1 be the present invention orebody mining schematic diagram;
Fig. 2 is the orebody mining schematic diagram after avalanche fore-set of the present invention.
In figure: 1. waste rock overburden, 2. fore-set, 3. substoping tunnel, the most not specification studding, 5. big gun hole, 6. foundation, 7. funnel, 8. drop shaft, 9. haulage drift, 10. Ore cover layer.
Detailed description of the invention
Embodiment 1
Referring to Fig. 1 and Fig. 2, the present invention will be further described:
Certain copper mine western part 3# ore body 875-975 line orebody thickness is less, and according to bottom-column-free sectional caving stoping method, not only ore dilution is big, and easily produces the loss of a large amount of chassis at ore body lower wall, and recovering effect is inconspicuous;Use block chambering method exploitation in the original plan, but due to block chambering method nugget time longer (being computed needing 5 years), and the haircut of country rock sheet is educated, and limits the block chambering method application in this location.Through multi-argument, under determining to use to sublevel open stope method be experimental program.
Trial stretch total length 100m, nugget height 50m, segmentation height 10m, every substoping width is ore body horizontal breadth;Mineral building length 50-75m, the thick 5-6m of fore-set 2, the high 8m of foundation 6, funnel 7 spacing 9m;And as required, stay discontinuous irregular studding 4 in each segmentation.Test uses lower wall to adopt Barebone, it is disposed with equipment raise and talent's well at 1000 lines, it is disposed with mine chute 8 at 950 lines, 1695m, 1685m, 1675m, 1665m and 1657m each substoping tunnel 3, each substoping tunnel 3 all has connecting taxiway to be connected with equipment raise, talent's well and mine chute 8, and test completes to adopt to cut quantities 1215m/9064.2m altogether.
Pilot region rock drilling uses YG-80 rock drill, φ 60mm cash tooth drill bit, and to fanhole(s) 5 on chisel, array pitch 1.2m, bottom hole pitch 1.8-2.2m, 45 ° of lateral opening angle, stope explosion uses ammonium pine wax explosive, degree of packing 1.0g/cm3;Require and Ore cover layer 10 thickness according to ore removal, every separate explosion 1-2 artillery salvo hole 5.
Pilot region layering ore removal uses WJD-075 type electric LHD, the horizontal ore removal of 1685m of topmost is to carry out under the conditions of barnyard, due to without Ore cover layer 10, ore removal is only carried out in the limited range of open wiring, survey factually, after ore removal, Ore height is 6m, and ore storage angle of repose is 60 °, open wiring mouth proud exposure 0.8-1.7m;The horizontal ore removal of 1675m, 1665m is carried out for 10 times at upper segment residual Ore cover layer, and each ore removal not only can release Ore loose portions, and explosion entity is taken up space and can be supplemented by top Ore, can release whole Caving System amount;After the horizontal back production of 1665m terminates, avalanche 1695m fore-set 2, fore-set 2 Ore and barnyard residual Ore pass through funnel 7 rolling to 1657m haulage drift 9.During mineral building back production, due to Earth pres-sure control appropriate measures, barnyard has good stability, and does not forms waste rock overburden 1.Through statistics, lower to sublevel open stope method than bottom-column-free sectional caving stoping method at tri-level many recovery Ore 9894t of 1685m, 1675m, 1665m.

Claims (4)

1. to sublevel open stope method under one kind, it is characterised in that: these mining codes include adopting quasi-cutting, back production falls ore deposit and ore removal step, specifically include:
A () adopts quasi-cutting: arrange nugget, nugget width 50-80m, high 40-60m along orebody trend;Nugget is divided into mineral building and ore pillar, and ore pillar includes the discontinuous irregular studding that fore-set thick for 8-12m, foundation thick for 6-10m and length direction stay;And nugget is divided in vertical direction 3-5 segmentation, segmentation height 8-12m;
B () back production falls ore deposit: across pitch arranges route; use fan-shaped row medium-length hole ore blast, carry out under barnyard without tight-face blasting or under limited Ore cover layer, carry out end wall local compression explosion, from ore body two ends to central authorities' drawing back; under the protection of fore-set, substoping the most successively;
(c) ore removal: layering ore removal uses scraper end ore removal way, and lower segmentation is ore removal under upper segmentation Ore cover layer;After whole mineral building back production terminates, avalanche fore-set, fore-set Ore and barnyard residual Ore are released in the funnel of bottom.
2. to sublevel open stope method under one as claimed in claim 1, it is characterised in that: the position of the discontinuous irregular studding that the length direction in (a) step stays and specification should design according to each segmentation grade and thickness situation of change.
3. to sublevel open stope method under one as claimed in claim 1, it is characterised in that: adopt after cut journey completes in the segmentation of (a) step, (b), the work of (c) step can be carried out in this segmentation.
4. to sublevel open stope method under one as claimed in claim 1, it is characterized in that: when (b) step dangerous situation occurs when barnyard, can avalanche fore-set immediately, become bottom-column-free sectional caving stoping method exploitation, now, in (c) step, fore-set Ore and barnyard residual Ore can be as the sealing coats of waste rock overburden.
CN201610252629.4A 2016-04-21 2016-04-21 Underhand sublevel open stoping method Pending CN105822307A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108955434A (en) * 2018-07-30 2018-12-07 玉溪大红山矿业有限公司 A kind of bright red mountain group iron ore medium-length hole blasting stoping method
CN109931063A (en) * 2019-04-25 2019-06-25 马钢集团矿业有限公司 To substep alternating expression filling mining method in one kind
CN110469330A (en) * 2018-05-09 2019-11-19 中冶北方(大连)工程技术有限公司 A kind of sublevel open stope method of the pillar without bottom structure
CN111779485A (en) * 2020-07-01 2020-10-16 长沙矿山研究院有限责任公司 Combined hole segmented open stope subsequent filling mining method
CN112177612A (en) * 2020-11-10 2021-01-05 长沙矿山研究院有限责任公司 Downward high-layering cemented filling mining method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2005139092A (en) * 2005-12-14 2007-06-27 Институт горного дела Уральского отделени Российской академии наук (RU) Method for underground development of powerful ore bodies
CN101864957A (en) * 2010-05-25 2010-10-20 广西大学 Great ore drawing simultaneous filling non-top column shrinkage mining method
CN102748029A (en) * 2012-07-05 2012-10-24 北京矿冶研究总院 Segmented mining method
CN104847355A (en) * 2015-05-15 2015-08-19 西北矿冶研究院 Continuous mining method of medium-thick heavy pitch ore body empty field
CN105041317A (en) * 2015-07-03 2015-11-11 中国瑞林工程技术有限公司 Medium-length hole shrinkage stoping method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2005139092A (en) * 2005-12-14 2007-06-27 Институт горного дела Уральского отделени Российской академии наук (RU) Method for underground development of powerful ore bodies
CN101864957A (en) * 2010-05-25 2010-10-20 广西大学 Great ore drawing simultaneous filling non-top column shrinkage mining method
CN102748029A (en) * 2012-07-05 2012-10-24 北京矿冶研究总院 Segmented mining method
CN104847355A (en) * 2015-05-15 2015-08-19 西北矿冶研究院 Continuous mining method of medium-thick heavy pitch ore body empty field
CN105041317A (en) * 2015-07-03 2015-11-11 中国瑞林工程技术有限公司 Medium-length hole shrinkage stoping method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110469330A (en) * 2018-05-09 2019-11-19 中冶北方(大连)工程技术有限公司 A kind of sublevel open stope method of the pillar without bottom structure
CN108955434A (en) * 2018-07-30 2018-12-07 玉溪大红山矿业有限公司 A kind of bright red mountain group iron ore medium-length hole blasting stoping method
CN109931063A (en) * 2019-04-25 2019-06-25 马钢集团矿业有限公司 To substep alternating expression filling mining method in one kind
CN109931063B (en) * 2019-04-25 2020-07-24 安徽马钢矿业资源集团有限公司 Upward step-by-step staggered filling mining method
CN111779485A (en) * 2020-07-01 2020-10-16 长沙矿山研究院有限责任公司 Combined hole segmented open stope subsequent filling mining method
CN112177612A (en) * 2020-11-10 2021-01-05 长沙矿山研究院有限责任公司 Downward high-layering cemented filling mining method

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