| 双刀头动静组合载荷破岩数值试验研究 |
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| 作者姓名： | Zhao Fujun Wang Hongyu Shen Peiwen Chen Caixian Xu Yanfei |
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| 作者单位： | 湖南科技大学能源与安全工程学院,湖南科技大学能源与安全工程学院 |
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| 基金项目： | National Science Foundation of China ,The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan) |
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| 摘 要： | This paper puts forward a new rock fragmentation loading method of dual-cutter head combined dynamic and static loads.By applying the numerical simulation software-RFPA2D,we have done numerical experiment about the siltstone’s crushing effect by dynamic load on single cutter head without confining pressure,dynamic load on single cutter head with confining pressure 10MPa and different dual-cutter heads spacing by combined dynamic and static loads with confining pressure 10MPa.Experimental results show that the confining pressure can obviously affect the rock fragmentation effect.Combined dynamic and static loads can greatly improve the rock fragmentation effect.There exists an optimal spacing of dual-cutter head that can make the rock fragmentation achieve the desired effect.Through analyzing the acoustic emission accumulative energy and quantity,the authors make a conclusion that the optimum spacing is 30 mm.
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| 关 键 词： | coupled static and dynamic loads rock fragmentation average degree numerical experiment |
Numerical experiment rock fragmentation by combined dynamic and static loads under dual-cutter head |
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| Zhao Fujun,Wang Hongyu,Shen Peiwen,Chen Caixian,Xu Yanfei.Numerical experiment rock fragmentation by combined dynamic and static loads under dual-cutter head[J].Engineering Sciences,2012,10(2):56-60. |
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| Authors: | Zhao Fujun Wang Hongyu Shen Peiwen Chen Caixian and Xu Yanfei |
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| Institution: | 1.School of Energy and Safety Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201,China; 2.Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines, Xiangtan, Hunan 411201, China;1.School of Energy and Safety Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201,China;;1.School of Energy and Safety Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201,China;;3.School of Energy and Mining Engineering, Liupanshui Normal College, Liupanshui, Guizhou 553004, China;1.School of Energy and Safety Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201,China; |
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| Abstract: | This paper puts forward a new rock fragmentation loading method of dual-cutter head combined dynamic and static loads.By applying the numerical simulation software-RFPA2D,we have done numerical experiment about the siltstone’s crushing effect by dynamic load on single cutter head without confining pressure,dynamic load on single cutter head with confining pressure 10MPa and different dual-cutter heads spacing by combined dynamic and static loads with confining pressure 10MPa.Experimental results show that the confining pressure can obviously affect the rock fragmentation effect.Combined dynamic and static loads can greatly improve the rock fragmentation effect.There exists an optimal spacing of dual-cutter head that can make the rock fragmentation achieve the desired effect.Through analyzing the acoustic emission accumulative energy and quantity,the authors make a conclusion that the optimum spacing is 30 mm. |
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| Keywords: | coupled static and dynamic loads rock fragmentation average degree numerical experiment |
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