Numerical Simulation Study of Variable-Mass Permeation of the Broken Rock Mass under Different Cementation Degrees
In order to analyze variable-mass permeation characteristics of broken rock mass under different cementation conditions and reveal the water inrush mechanism of geological structures containing broken rock masses like karst collapse pillars (KCPs) in the coal mine, the EDEM-FLUENT coupling simulatio...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/3592851 |
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| author | Chong Li Banghua Yao Qingqing Ma |
| author_facet | Chong Li Banghua Yao Qingqing Ma |
| author_sort | Chong Li |
| collection | DOAJ |
| description | In order to analyze variable-mass permeation characteristics of broken rock mass under different cementation conditions and reveal the water inrush mechanism of geological structures containing broken rock masses like karst collapse pillars (KCPs) in the coal mine, the EDEM-FLUENT coupling simulation system was used to implement a numerical simulation study of variable-mass permeation of broken rock mass under different cementation conditions and time-dependent change laws of parameters like porosity, permeability, and mass loss rate of broken rock specimens under the erosion effect were obtained. Study results show that (1) permeability change of broken rock specimens under the particle migration effect can be divided into three phases, namely, the slow-changing seepage phase, sudden-changing seepage phase, and steady seepage phase. (2) Specimen fillings continuously migrate and run off under the water erosion effect, porosity and permeability rapidly increase and then tend to be stable, and the mass loss rate firstly rapidly increases and then gradually decreases. (3) Cementation degree has an important effect on permeability of broken rock mass. As cementing force of the specimen is enhanced, its maximum mass loss rate, mass loss, porosity, and permeability all continuously decrease. The study approach and results not only help enhance coal mining operations safety by better understanding KCP water inrush risks. It can also be extended to other engineering applications such as backfill paste piping and tailing dam erosion. |
| format | Article |
| id | doaj-art-afed1266f4674baba39560eab1237fa9 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-afed1266f4674baba39560eab1237fa92025-02-03T06:07:35ZengWileyAdvances in Civil Engineering1687-80861687-80942018-01-01201810.1155/2018/35928513592851Numerical Simulation Study of Variable-Mass Permeation of the Broken Rock Mass under Different Cementation DegreesChong Li0Banghua Yao1Qingqing Ma2School of Mines, Key Laboratory of Deep Coal Resource Mining, Ministry of Education, China University of Mining & Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, ChinaSchool of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454000, ChinaIn order to analyze variable-mass permeation characteristics of broken rock mass under different cementation conditions and reveal the water inrush mechanism of geological structures containing broken rock masses like karst collapse pillars (KCPs) in the coal mine, the EDEM-FLUENT coupling simulation system was used to implement a numerical simulation study of variable-mass permeation of broken rock mass under different cementation conditions and time-dependent change laws of parameters like porosity, permeability, and mass loss rate of broken rock specimens under the erosion effect were obtained. Study results show that (1) permeability change of broken rock specimens under the particle migration effect can be divided into three phases, namely, the slow-changing seepage phase, sudden-changing seepage phase, and steady seepage phase. (2) Specimen fillings continuously migrate and run off under the water erosion effect, porosity and permeability rapidly increase and then tend to be stable, and the mass loss rate firstly rapidly increases and then gradually decreases. (3) Cementation degree has an important effect on permeability of broken rock mass. As cementing force of the specimen is enhanced, its maximum mass loss rate, mass loss, porosity, and permeability all continuously decrease. The study approach and results not only help enhance coal mining operations safety by better understanding KCP water inrush risks. It can also be extended to other engineering applications such as backfill paste piping and tailing dam erosion.http://dx.doi.org/10.1155/2018/3592851 |
| spellingShingle | Chong Li Banghua Yao Qingqing Ma Numerical Simulation Study of Variable-Mass Permeation of the Broken Rock Mass under Different Cementation Degrees Advances in Civil Engineering |
| title | Numerical Simulation Study of Variable-Mass Permeation of the Broken Rock Mass under Different Cementation Degrees |
| title_full | Numerical Simulation Study of Variable-Mass Permeation of the Broken Rock Mass under Different Cementation Degrees |
| title_fullStr | Numerical Simulation Study of Variable-Mass Permeation of the Broken Rock Mass under Different Cementation Degrees |
| title_full_unstemmed | Numerical Simulation Study of Variable-Mass Permeation of the Broken Rock Mass under Different Cementation Degrees |
| title_short | Numerical Simulation Study of Variable-Mass Permeation of the Broken Rock Mass under Different Cementation Degrees |
| title_sort | numerical simulation study of variable mass permeation of the broken rock mass under different cementation degrees |
| url | http://dx.doi.org/10.1155/2018/3592851 |
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