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Experimental Study of the Influence of Drawbell Geometry on Hang-Ups in Cave Mine Applications
Coarse arches are a common issue in caving mines where large fragments are expected. These arches interrupt ore flow in drawpoints, decreasing available draw area, and also increasing the possibility of non-uniform draw, which can increase fine migration, mud-rush risk, and induced stress in the cav...
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| Published in: | Rock mechanics and rock engineering 2021, Vol.54 (1), p.1-10 |
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| cites | cdi_FETCH-LOGICAL-c319t-6b60249d9586ebd235227d1e96a5b275b59deb82439db97b77364ec96fad80d3 |
| container_end_page | 10 |
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| container_title | Rock mechanics and rock engineering |
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| creator | Castro, Raúl López, Sebastian Gómez, René Ortiz, Sebastian Carreño, Nicolas |
| description | Coarse arches are a common issue in caving mines where large fragments are expected. These arches interrupt ore flow in drawpoints, decreasing available draw area, and also increasing the possibility of non-uniform draw, which can increase fine migration, mud-rush risk, and induced stress in the caved column. Moreover, hang-up removal is operationally complex and dangerous. The literature on gravity flow indicates that coarse arches are mainly influenced by the ratio between the rock fragments and the size of the opening and stresses, but some key variables have not been quantified. Here, the influence of fragment-size distribution and drawbell geometry on hang-up formation is analyzed through controlled laboratory experiments in a physical model. Results show that drawbell parameters, such as length, width and angle are relevant parameters in hang-up events. In particular, the ratios
D
L
/d
80
and
D
W
/d
80
as well as
V
DB
/V
p
are key to hang-up events, the probability of which will decrease when these ratios increase. |
| doi_str_mv | 10.1007/s00603-020-02247-4 |
| format | article |
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D
L
/d
80
and
D
W
/d
80
as well as
V
DB
/V
p
are key to hang-up events, the probability of which will decrease when these ratios increase.</description><identifier>ISSN: 0723-2632</identifier><identifier>EISSN: 1434-453X</identifier><identifier>DOI: 10.1007/s00603-020-02247-4</identifier><language>eng</language><publisher>Vienna: Springer Vienna</publisher><subject>Arches ; Civil Engineering ; Earth and Environmental Science ; Earth Sciences ; Fragments ; Geophysics/Geodesy ; Gravity ; Gravity flow ; Original Paper ; Parameters ; Particle size distribution ; Probability theory ; Ratios ; Size distribution</subject><ispartof>Rock mechanics and rock engineering, 2021, Vol.54 (1), p.1-10</ispartof><rights>Springer-Verlag GmbH Austria, part of Springer Nature 2020</rights><rights>Springer-Verlag GmbH Austria, part of Springer Nature 2020.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c319t-6b60249d9586ebd235227d1e96a5b275b59deb82439db97b77364ec96fad80d3</citedby><cites>FETCH-LOGICAL-c319t-6b60249d9586ebd235227d1e96a5b275b59deb82439db97b77364ec96fad80d3</cites><orcidid>0000-0003-4273-0522</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>315,786,790,27957,27958</link.rule.ids></links><search><creatorcontrib>Castro, Raúl</creatorcontrib><creatorcontrib>López, Sebastian</creatorcontrib><creatorcontrib>Gómez, René</creatorcontrib><creatorcontrib>Ortiz, Sebastian</creatorcontrib><creatorcontrib>Carreño, Nicolas</creatorcontrib><title>Experimental Study of the Influence of Drawbell Geometry on Hang-Ups in Cave Mine Applications</title><title>Rock mechanics and rock engineering</title><addtitle>Rock Mech Rock Eng</addtitle><description>Coarse arches are a common issue in caving mines where large fragments are expected. These arches interrupt ore flow in drawpoints, decreasing available draw area, and also increasing the possibility of non-uniform draw, which can increase fine migration, mud-rush risk, and induced stress in the caved column. Moreover, hang-up removal is operationally complex and dangerous. The literature on gravity flow indicates that coarse arches are mainly influenced by the ratio between the rock fragments and the size of the opening and stresses, but some key variables have not been quantified. Here, the influence of fragment-size distribution and drawbell geometry on hang-up formation is analyzed through controlled laboratory experiments in a physical model. Results show that drawbell parameters, such as length, width and angle are relevant parameters in hang-up events. In particular, the ratios
D
L
/d
80
and
D
W
/d
80
as well as
V
DB
/V
p
are key to hang-up events, the probability of which will decrease when these ratios increase.</description><subject>Arches</subject><subject>Civil Engineering</subject><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>Fragments</subject><subject>Geophysics/Geodesy</subject><subject>Gravity</subject><subject>Gravity flow</subject><subject>Original Paper</subject><subject>Parameters</subject><subject>Particle size distribution</subject><subject>Probability theory</subject><subject>Ratios</subject><subject>Size distribution</subject><issn>0723-2632</issn><issn>1434-453X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp9kDFPwzAQhS0EEqXwB5gsMRsc27HjsSrQVipioEhMWE5yKalSJ9gp0H-PS5DYGE4n3b33TvchdJnQ64RSdRMolZQTymgsJhQRR2iUCC6ISPnLMRpRxThhkrNTdBbChtK4VNkIvd59deDrLbjeNvip35V73Fa4fwO8cFWzA1fAYXDr7WcOTYNn0G6h91Hl8Ny6NXnuAq4dntoPwA-1AzzpuqYubF-3Lpyjk8o2AS5--xit7u9W0zlZPs4W08mSFDzRPZG5pEzoUqeZhLxkPGVMlQloadOcqTRPdQl5xgTXZa5VrhSXAgotK1tmtORjdDXEdr5930HozabdeRcvGiYyRaWWiYwqNqgK34bgoTJd_Nz6vUmoOWA0A0YTMZofjEZEEx9MIYrdGvxf9D-ub_QvdKs</recordid><startdate>2021</startdate><enddate>2021</enddate><creator>Castro, Raúl</creator><creator>López, Sebastian</creator><creator>Gómez, René</creator><creator>Ortiz, Sebastian</creator><creator>Carreño, Nicolas</creator><general>Springer Vienna</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7TN</scope><scope>7UA</scope><scope>7XB</scope><scope>88I</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>FR3</scope><scope>GNUQQ</scope><scope>H96</scope><scope>HCIFZ</scope><scope>KR7</scope><scope>L.G</scope><scope>L6V</scope><scope>M2P</scope><scope>M7S</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>Q9U</scope><orcidid>https://orcid.org/0000-0003-4273-0522</orcidid></search><sort><creationdate>2021</creationdate><title>Experimental Study of the Influence of Drawbell Geometry on Hang-Ups in Cave Mine Applications</title><author>Castro, Raúl ; 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These arches interrupt ore flow in drawpoints, decreasing available draw area, and also increasing the possibility of non-uniform draw, which can increase fine migration, mud-rush risk, and induced stress in the caved column. Moreover, hang-up removal is operationally complex and dangerous. The literature on gravity flow indicates that coarse arches are mainly influenced by the ratio between the rock fragments and the size of the opening and stresses, but some key variables have not been quantified. Here, the influence of fragment-size distribution and drawbell geometry on hang-up formation is analyzed through controlled laboratory experiments in a physical model. Results show that drawbell parameters, such as length, width and angle are relevant parameters in hang-up events. In particular, the ratios
D
L
/d
80
and
D
W
/d
80
as well as
V
DB
/V
p
are key to hang-up events, the probability of which will decrease when these ratios increase.</abstract><cop>Vienna</cop><pub>Springer Vienna</pub><doi>10.1007/s00603-020-02247-4</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0003-4273-0522</orcidid></addata></record> |
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| source | Springer Link |
| subjects | Arches Civil Engineering Earth and Environmental Science Earth Sciences Fragments Geophysics/Geodesy Gravity Gravity flow Original Paper Parameters Particle size distribution Probability theory Ratios Size distribution |
| title | Experimental Study of the Influence of Drawbell Geometry on Hang-Ups in Cave Mine Applications |
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