Numerical simulation of the top coal caving process using the discrete element method
How to understand the top coal caving process and increase the top coal recovery ratio is one of the urgent problems to resolve for longwall top coal caving technology. This paper discusses a new theory and technology of top coal caving with vibration. The vibration device is mounted on the shield b...
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| Veröffentlicht in: | International journal of rock mechanics and mining sciences (Oxford, England : 1997) England : 1997), 2009-09, Vol.46 (6), p.983-991 |
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| container_title | International journal of rock mechanics and mining sciences (Oxford, England : 1997) |
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| creator | Xie, Yao-She Zhao, Yang-Sheng |
| description | How to understand the top coal caving process and increase the top coal recovery ratio is one of the urgent problems to resolve for longwall top coal caving technology. This paper discusses a new theory and technology of top coal caving with vibration. The vibration device is mounted on the shield beam of the top coal caving support. The vibrator destroys the arch structure formed during the top coal caving process, which results in the smooth top coal caving process, and in this way the top coal recovery ratio is increased. The distinct element method (DEM) numerical software particle flow code in 2 dimensions (PFC2D) is used for the numerical simulation. It is proven that the vibration can easily destroy the arch structure which is formed during the top coal caving process. The parameters about when the arch structure would be formed during the top coal caving process have been obtained. The movement of the top coal caving process under the vibration condition makes a more stable layer uniform caving performance. The aim of the top coal caving with vibration technology, to increase the top coal recovery ratio and to lower the waste content rate, has been achieved. |
| doi_str_mv | 10.1016/j.ijrmms.2009.03.005 |
| format | Article |
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This paper discusses a new theory and technology of top coal caving with vibration. The vibration device is mounted on the shield beam of the top coal caving support. The vibrator destroys the arch structure formed during the top coal caving process, which results in the smooth top coal caving process, and in this way the top coal recovery ratio is increased. The distinct element method (DEM) numerical software particle flow code in 2 dimensions (PFC2D) is used for the numerical simulation. It is proven that the vibration can easily destroy the arch structure which is formed during the top coal caving process. The parameters about when the arch structure would be formed during the top coal caving process have been obtained. The movement of the top coal caving process under the vibration condition makes a more stable layer uniform caving performance. The aim of the top coal caving with vibration technology, to increase the top coal recovery ratio and to lower the waste content rate, has been achieved.</description><identifier>ISSN: 1365-1609</identifier><identifier>EISSN: 1873-4545</identifier><identifier>DOI: 10.1016/j.ijrmms.2009.03.005</identifier><language>eng</language><publisher>Oxford: Elsevier Ltd</publisher><subject>Applied sciences ; Buildings. Public works ; Computation methods. Tables. Charts ; DEM simulation ; Exact sciences and technology ; Geotechnics ; Longwall ; Miscellaneous ; Recovery ratio ; Structural analysis. 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The aim of the top coal caving with vibration technology, to increase the top coal recovery ratio and to lower the waste content rate, has been achieved.</description><subject>Applied sciences</subject><subject>Buildings. Public works</subject><subject>Computation methods. Tables. Charts</subject><subject>DEM simulation</subject><subject>Exact sciences and technology</subject><subject>Geotechnics</subject><subject>Longwall</subject><subject>Miscellaneous</subject><subject>Recovery ratio</subject><subject>Structural analysis. 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Stresses</topic><topic>Top coal caving</topic><topic>Vibration</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Xie, Yao-She</creatorcontrib><creatorcontrib>Zhao, Yang-Sheng</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><jtitle>International journal of rock mechanics and mining sciences (Oxford, England : 1997)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Xie, Yao-She</au><au>Zhao, Yang-Sheng</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Numerical simulation of the top coal caving process using the discrete element method</atitle><jtitle>International journal of rock mechanics and mining sciences (Oxford, England : 1997)</jtitle><date>2009-09-01</date><risdate>2009</risdate><volume>46</volume><issue>6</issue><spage>983</spage><epage>991</epage><pages>983-991</pages><issn>1365-1609</issn><eissn>1873-4545</eissn><abstract>How to understand the top coal caving process and increase the top coal recovery ratio is one of the urgent problems to resolve for longwall top coal caving technology. This paper discusses a new theory and technology of top coal caving with vibration. The vibration device is mounted on the shield beam of the top coal caving support. The vibrator destroys the arch structure formed during the top coal caving process, which results in the smooth top coal caving process, and in this way the top coal recovery ratio is increased. The distinct element method (DEM) numerical software particle flow code in 2 dimensions (PFC2D) is used for the numerical simulation. It is proven that the vibration can easily destroy the arch structure which is formed during the top coal caving process. The parameters about when the arch structure would be formed during the top coal caving process have been obtained. The movement of the top coal caving process under the vibration condition makes a more stable layer uniform caving performance. 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| ispartof | International journal of rock mechanics and mining sciences (Oxford, England : 1997), 2009-09, Vol.46 (6), p.983-991 |
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| source | Elsevier ScienceDirect Journals |
| subjects | Applied sciences Buildings. Public works Computation methods. Tables. Charts DEM simulation Exact sciences and technology Geotechnics Longwall Miscellaneous Recovery ratio Structural analysis. Stresses Top coal caving Vibration |
| title | Numerical simulation of the top coal caving process using the discrete element method |
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