| 破碎岩体压实特性的三维离散元数值计算方法研究 |
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| 引用本文： | 朱德福,屠世浩,袁 永,马行生,李向阳.破碎岩体压实特性的三维离散元数值计算方法研究[J].岩土力学,2018,39(3):1047-1055. |
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| 作者姓名： | 朱德福 屠世浩 袁 永 马行生 李向阳 |
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| 作者单位： | 1. 中国矿业大学 矿业工程学院，江苏 徐州 221116；2. 中国矿业大学 深部煤炭资源开采教育部重点实验室，江苏 徐州 221116 |
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| 基金项目： | 国家自然科学基金项目（No.51374200，No.51404249）；江苏省自然科学基金资助项目（No.BK20140201）；江苏省研究生科研与实践创新计划项目（No.SJCX17_0519）。 |
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| 摘 要： | 研究破碎岩体的压实特性是矿井地下工程的基础工作之一，由于破碎岩体所处环境的隐蔽性与危险性，常采用实验室测试和数值计算的研究方法。提出了一种三维破碎岩体模型构建方法，即在3D Voronoi建立完整岩体数值模型的基础上，通过预定孔隙率，随机删除完整岩体中的块体反演破碎岩体结构，测定破碎岩体的压实特性。该方法可较真实地反映破碎岩体的块度特征、碎胀特性与压实特性，与现有研究方法有较高的吻合度，为矿山地下工程的安全控制提供了新的有效的研究方法。
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| 关 键 词： | 破碎岩体 离散元 建模方法 岩性分布模型 压实特性 |
| 收稿时间： | 2017-07-17 |
An approach to determine the compaction characteristics of fractured rock by 3D discrete element method |
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| ZHU De-fu,TU Shi-hao,YUAN Yong,MA Hang-sheng,LI Xiang-yang.An approach to determine the compaction characteristics of fractured rock by 3D discrete element method[J].Rock and Soil Mechanics,2018,39(3):1047-1055. |
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| Authors: | ZHU De-fu TU Shi-hao YUAN Yong MA Hang-sheng LI Xiang-yang |
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| Institution: | 1. School of Mines, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China; 2. Key Laboratory of Deep Coal Resource Mining, Ministry of Education of China, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China |
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| Abstract: | The study on compaction characteristics of fractured rock mass is considered as one of the basic work of underground engineering in coal mines. Since fractured rock mass exists in the hidden and dangerous environment, laboratory experiments and numerical simulations are normally applied to determine the compaction characteristics indirectly. To construct three-dimensional (3D) model of fractured rock mass, this paper presented a novel method which was based on the 3D Voronoi numerical model of intact rock mass. In this model, the porosity was pre-determined and the structure of fractured rock mass was retrieved by randomly removing the blocks in the intact rock mass. Moreover, the Weibull distribution was introduced to describe mechanical parameters of joints. In addition, uniaxial compression experiments were conducted to investigate the compaction characteristics. Compared with existing theoretical and experimental results, this method demonstrated good agreements with them. It is proved that this parametric method can reflect the fragmentation, bulking and compaction characteristics of fractured rock mass more accurately. Therefore, this study provides a new and effective method for the safety control of underground engineering in coal mines, which can be widely used in the gravel experiments. |
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| Keywords: | broken rock discrete element method modelling method lithologic distribution model compaction characteristics |
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