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mining of narrow steeply dipping veins

  • Mining Terms

    Continuous Mining Vein Bedded Deposits Some Examples for Surface Mining Open Cast Mining Open Pit Mining Strip Mining Quarry Mining A mineralized zone having a tabular form Its depth and length are much greater than its width Often the zone is steeply dipping Waste The barren rock in a mine which is too low grade to be of

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  • Shrinkage Stoping

    Gentle rolls along the dip are acceptable if the local footwall dip everywhere exceeds 0.78 to 0.87 rad 45 to 50° Off dip hanging wall and/or footwall splits can generally be mined selectively from a conventional shrink stope as they are encountered without ad¬versely affecting subsequent continuation of shrinkage mining updip on the main vein.

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  • Mining Machines for Small Spaces

    Mining Machines for Small Spaces E MJ looks at recent developments in specialist machines for narrow vein mining By Simon Walker European Editor This view of J H Fletcher s N3112AD/E bolter highlights the company s operator up design allowing the operator

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  • Improving ground control safety in deep vein mines

    ground control safety in deep vein mines is Hecla currently using underhand cut and fill mining methods to mine Ag Pb Zn ore from narrow steeply dipping veins in the Gold Hunter deposit at a depth of over 7000 feet Mining induced stress increases near a large sill pillar in the mine s main production vein have

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  • Shrinkage Stoping

    Gentle rolls along the dip are acceptable if the local footwall dip everywhere exceeds 0.78 to 0.87 rad 45 to 50° Off dip hanging wall and/or footwall splits can generally be mined selectively from a conventional shrink stope as they are encountered without ad¬versely affecting subsequent continuation of shrinkage mining updip on the main vein.

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  • DEVELOPMENT OF A WORKING PLATFORM FOR INTERMEDIATE DIPPING

    of narrow vein operations 2.0 Current situation The room and pillar mining method is currently used when the dip of the vein is less than 45 degrees The mining sequence progresses from the bottom up and requires four 4 metres by four 4 metres rock pillars set at regular intervals in the stope The ore is

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  • RUSORO MINING LTD

    defined significant gold resources hosted in narrow steeply dipping quartz veins Rusoro has noted and Micon concurs that the next major step in the development of the SREP project including the Days Vein should be a preliminary economic assessment PEA

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  • Kirwin

    Ore minerals targeted by the early miners occur as fracture fill in narrow steeply dipping veins that cut the volcanic flows and sediments These veins are associated with the intrusive bodies and often are parallel to dikes that probably fractured the rock.

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  • Kapan

    Chaarat Kapan CJSC comprises one Mining Licence and one Exploration Licence covering 90.7 km2 which draw from the Shahumyan deposit The Shahumyan mineralization is characterized by narrow veins 0.2 2.0 m steeply dipping 70° 85° east west

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  • Talapoosa

    Since 1977 eight mining companies have carried out exploration and development with 564 drill holes totaling 71 000 meters along with extensive metallurgical test work and environmental studies is dominated by widespread and intense argillic alteration associated with the narrow steeply dipping higher grade vein breccia structures.

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  • Black Gold Mines property

    Black Gold Mines property Summary The Black slightly north of east and dip steeply to the south Frequent showings of visible gold were noted along the veins In around 1917 an inclined shaft was put down 125 feet and about 40 feet of drifting was done on the #1 vein The vein was exposed by this work as a narrow quartz stringer dipping

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  • Geology and Mineralization

    Historic mining focused on a number of steeply plunging ore shoots developed within the 75 85 fissure zone including the 756 ore shoot to the north centrally located 75 85 vein segments and the Survey ore shoot to the south Importantly all historic mining was focused within the westerly dipping 75 85 fissure.

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  • Mining Machines for Small Spaces

    As noted in last year s review Niche Machines for Narrow Vein Mining Boart Longyear s focus for narrow vein applications is on long hole rigs for stoping Weighing just 3.75 mt its StopeMate pneumatic production drill is small enough to fit through a 1.3 m x 1.9 m 50 x 75 in opening and can fit into a man cage with no disassembly.

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  • Richest Gold Mines in The World

    11 08 2020  Barrick s Bulyanhulu Gold Mine is an underground gold mine in the Shinyanga Region of Tanzania located 55 kilometres south of Lake Victoria Bulyanhulu is a narrow vein gold mine containing gold silver and copper mineralisation in sulphides The mineralisation of Bulyanhulu is associated with a number of steeply dipping veins.

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  • Evaluation of Overhand Cut and Fill Mining Method used in

    mines the adoption of the Overhand Cut and Fill mining method is influenced by the steeply dipping vein environment with rock intercalations and high water inflows with less competent country rock Although cut– and–fill mining has been traditionally successful ensuring high recovery and safety only limited studies as

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  • Austral Gold

    Underground mine The Casposo Mine consists of a number of narrow steeply dipping orebodies known as Aztec B Vein B Vein1 Inca0 Inca1 Inca2A Inca2B Mercado and Julieta The main production from the underground mine to date has been from Inca1 Aztec and Inca2A The mining method used at the Casposo Mine is Longitudinal Longhole Retreat.

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  • Great Panther Mining Limited Topia

    18 10 2021  They are steeply dipping and due to their narrow width mine development is on vein rather than parallel to it Consequently the veins are drilled at wide spacing from surface to trace their lateral continuity then detail sampled underground as development progresses Very little underground exploration drilling is conducted.

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  • Newlox Gold samples 77.1 g/t gold at Boston Mine Costa

    At the Boston mine historical records and recent local mining indicate four mining levels targeting a system of steeply dipping northeast trending veins up to 5 metres thick with grades up to 77.1 g/t that are readily accessible for immediate exploitation.

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  • Magellan Gold Signs Stock Purchase ..

    02 07 2020  Similar to several historic mines in the Elk City area gold is hosted in steeply dipping quartz veins The gold exists in high grade veins at the Center Star Mine where the veins trend northeast and dip steeply toward the southeast These veins exist in a 75′ to 100′ wide shear zone that presents quartz veins and breccia.

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  • Barrick Gold Corporation

    Bulyanhulu is a narrow vein gold mine containing gold silver and copper mineralisation in sulphides The mineralisation of Bulyanhulu is associated with a number of steeply dipping veins Bulyanhulu commenced commercial production in 2001.

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  • The McCoy mining district and gold veins in Horse Canyon

    miners and prospectors of the district and especially to Mr Joseph H As a rule they dip steeply The deposits are of two types replacement deposits and con rich ore is sporadically distributed There are no veins or fissures except in the narrow fractures

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  • Types of Underground Mining Method Comparison

    16 03 2017  Mining by Combination Stoping In a discussion of stoping methods steeply pitching veins are usually referred to because the majority of veins in nature are steeper than 45° and also because to refer each method of stoping to veins of all dips causes confusion.

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  • The lead zinc veins of the Chilete mining district in

    The lead zinc ores of the Chilete district Cajamarca Peru occur in steeply dipping veins formed by fissure and breccia filling and to some extent by replacement processes in altered andesitic volcanic rocks which overlie Cretaceous formations with angular unconformity.

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  • SMD Technology

    and leaving traditional mining methods in the past SMD Technology Novamera Staff 2021 07 28T10 39 52 04 00 Novamera with the assistance of Memorial University of Newfoundland in St John s has developed Sustainable Mining By Drilling SMD a leading edge solution for mining steeply dipping narrow vein deposits SMD is safer.

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  • VERY HIGH GRADE OROGENIC QUARTZ AU VEIN DEPOSITS IN

    Massive vein type Steeply dipping quartz gold veins occur in linear shear zones within slatey mudstone and sandstone Veins are narrow but high grade Average grade of probable mining blocks 23 27 g/t using 100 g/t top cut Uncut 42 g/t Grade and width vary widely horizontally and vertically Coarse visible gold in sulphide

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  • Geostatistical resource estimation for the Poura narrow

    A case study for the application of a novel geostatistical technique for resource estimation of a narrow steeply dipping gold silver mineralized quartz vein deposit is

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  • Monitor Project

    Recent maximum assay results from the mine waste dumps returned values of 13.55 Cu 15.45 g/t Au and 57.7 g/t Ag Richmond average grade of historic reported Cu produced was 7.5 Cu The Monitor properties mineralization occurs in wide steeply dipping vein

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  • Thesis

    The scope of the thesis is a case study of the Lapa Mine of Agnico Eagle Mines Limited a gold mining operation situated in the Abitibi region of Quebec The Lapa orebody is a narrow vein steeply dipping deposit with varying width and is extracted with longitudinal retreat mining method.

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  • Preliminary Structural Study of the Gold bearing Shear

    hosted by narrow steeply northwest dipping to subvertical northeast and east northeast trending shear zones consisting of well foliated L S tectonites that are characterized by a steep mylonitic foliation and a steeply west plunging mineral lineation Auriferous veins occur as riedel R and P veins oriented 5° to 15° from the shear

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  • Mining ppt 2014

    29 03 2014  Open Underhand stoping It is best suited to narrow steeply dipping veins with strong walls Ore requires No sorting Open Overhand stoping In this method stoping is started from a raise in the lower level and progesses upwards Working face is free for miners It s use higher and low dip

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  • Estimation of the potential production rate

    Steeply dipping tabular or massive deposits that are worked in steps towards great depths limited to rate of deepening of the working use #Tatman 2001 Erratically mineralized multi vein systems production rate limited to discovery rate USBM/USGS Modifications

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  • Effect of stope construction parameters on ore dilution in

    thesis is a case study of the Lapa Mine of Agnico Eagle Mines Limited a gold mining operation situated in the Abitibi region of Quebec The Lapa orebody is a narrow vein steeply dipping deposit with varying width and is extracted with longitudinal retreat mining method.

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  • stopes for narrow vein vertical mining methods

    stopes for narrow vein vertical mining methods Designed specifically for use in narrow vein steeply dipping ore bodies Deswik.ASD quickly generates detailed stope shapes that are traditionally designed manually Working from a geological block model the tool automates the process of generating sectional slices through the ore body.

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  • Rebeico Copper Gold Ridgestone Mining Inc.

    The Alaska vein has been traced for approximately 1.2km along strike and varies from about 0.5 to 2 metres in width with a strike from N10E to N10W and dips to the east at 45° to 75° At and near the surface and in the upper 50 metres of historical mine workings it consists of variable mixtures of quartz limonite hematite magnetite pyrite chrysacolla malachite and azurite.

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  • Underground Mining Methods

    Post room and pillar mining Figure 1.3 applies to inclined ore bodies with dip angles from 200 to 550 These mines have large vertical heights where the mined out space is backfilled The fill keeps the rock mass stable and serves as a work platform while the next ore slice is mined Step room and pillar mining Figure 1.4 is an adaptation of

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  • Major Mines Projects

    The mineralisation is hosted in three steeply dipping vein sets or lodes the Hanging Wall Lodes Lodes 100 and 300 and the Footwall Lode Lode 200 Together these form an elongate mineralised zone striking 010º and dipping 60º to 70º towards the west within a

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  • Kern County California Gold Production Western Mining

    Gold deposits are in steeply dipping quartz veins in the rhyolite porphyry that seem to flatten at depth and then follow the porphyry granite contact The veinfilling consists of quartz granite fragments calcite ferruginous clay and manganese Tucker and Sampson 1933 p 284 .

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  • Using Geostatistics to Estimate the Resources of a Narrow

    The Poura Mine in Burkina Faso West Africa consists of steeply dipping gold silver mineralized quartz veins The structure has a strike length of two kilometres and an average vein thickness of about two metres This resource estimate concentrated on the remnant ore blocks and pillars in

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  • UKMV

    The Sutcliffe vein exposed in the quarry face prior to commencement of underground mining operations at the Diana Maria mine The vein dips steeply at between 78° and 88° through the Great Limestone unit 28th April 2018 .

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