工程科学学报，第37卷，第9期：1111-1117,2015年9月 Chinese Journal of Engineering,Vol.37,No.9:1111-1117,September 2015 D0l:10.13374/j.issn2095-9389.2015.09.001:http://journals.ustb.edu.cn 崩落法采矿中放出体流动特性的影响因素 孙 浩，金爱兵四，高永涛，周 喻，杨振伟 北京科技大学土木与环境工程学院，北京100083 ☒通信作者，E-mail:jinaibing@ustb.cdu.cm 摘要基于颗粒元理论和P℉℃”程序，构建具有矿石散体细观力学性质的放矿模型，开展崩落法采矿中放出体流动特性影 响因素研究.运用统计学知识确定对放出体流动特性有显著影响的主要因素及其敏感性，得出其与放出体流动特性的关系， 并通过已有研究结论与模拟结果的对比分析，验证了基于P℉℃”程序的放矿模型在放出体流动特性影响因素研究中的适宜性 与可靠性.研究表明：放出体颗粒形状、摩擦系数及放矿口尺寸三种因素是显著影响崩落矿岩流动特性的重要参数.在放矿 初始阶段，放矿口尺寸对放出体形态影响最大，其次为摩擦系数，颗粒形状对其影响最小：在之后的放矿过程中，颗粒形状对 放出体形态影响最大，其次为放矿口尺寸和摩擦系数.散体颗粒形状越不规则、散体内摩擦角越大以及放矿口尺寸越小则放 矿越困难 关键词崩落法：流动特性：影响因素：数学模型 分类号TD85 Influencing factors on the flow characteristics of an isolated extraction zone in caving mining SUN Hao,JIN Ai-bing,GAO Yong-tao,ZHOU Yu,YANG Zhen-tei Civil and Environmental Engineering School,University of Science and Technology Beijing,Beijing 100083,China Corresponding author,E-mail:jinaibing@ustb.edu.cn ABSTRACT Based on the particle flow theory and PFC3 code,a draw model with the meso-mechanical properties of ore granular media was constructed to study influencing factors on the flow characteristics of an isolated extraction zone in caving mining.Major factors that have significant influence on the flow characteristics of the isolated extraction zone and their sensibility and relationships with the flow characteristics were determined by statistical knowledge.Simultaneously,the suitability and reliability of the draw model based on PFC code and used in influencing factor research of the isolated extraction zone were validated by contrastive analysis between existing research conclusions and simulated results.The research results show that particle shape,friction coefficient,and drawpoint size are important parameters significantly influencing the flow characteristics of the caved ore and rock.In the initial stage of drawing,drawpoint size has the greatest influence on the form of the isolated extraction zone followed by friction coefficient and particle shape;in the following stage of drawing,particle shape has the greatest influence on the form of the isolated extraction zone followed by drawpoint size and friction coefficient.The drawing will be more difficult if the particle shape is more irregular,the inter- nal friction angle of particles is larger and the drawpoint size is smaller. KEY WORDS caving mining:flow characteristics;influencing factors;mathematical models 崩落采矿法在国内外金属矿山应用十分广泛，我 高达85%以上，有色金属矿山使用崩落法采出矿石量 国黑色金属矿山地下采矿中使用崩落法采出的矿石量 已达到40%左右，而国际上使用该方法进行开采的矿 收稿日期：201407-16 基金项目：国家自然科学基金资助项目(51374032)：科技北京百名领军人才培养工程(Z151100000315014)书 工程科学学报，第 37 卷，第 9 期: 1111--1117，2015 年 9 月 Chinese Journal of Engineering，Vol． 37，No． 9: 1111--1117，September 2015 DOI: 10． 13374 /j． issn2095--9389． 2015． 09． 001; http: / /journals． ustb． edu． cn 崩落法采矿中放出体流动特性的影响因素 孙 浩，金爱兵，高永涛，周 喻，杨振伟 北京科技大学土木与环境工程学院，北京 100083  通信作者，E-mail: jinaibing@ ustb． edu． cn 摘 要 基于颗粒元理论和 PFC3D 程序，构建具有矿石散体细观力学性质的放矿模型，开展崩落法采矿中放出体流动特性影 响因素研究． 运用统计学知识确定对放出体流动特性有显著影响的主要因素及其敏感性，得出其与放出体流动特性的关系， 并通过已有研究结论与模拟结果的对比分析，验证了基于 PFC3D 程序的放矿模型在放出体流动特性影响因素研究中的适宜性 与可靠性． 研究表明: 放出体颗粒形状、摩擦系数及放矿口尺寸三种因素是显著影响崩落矿岩流动特性的重要参数． 在放矿 初始阶段，放矿口尺寸对放出体形态影响最大，其次为摩擦系数，颗粒形状对其影响最小; 在之后的放矿过程中，颗粒形状对 放出体形态影响最大，其次为放矿口尺寸和摩擦系数． 散体颗粒形状越不规则、散体内摩擦角越大以及放矿口尺寸越小则放 矿越困难． 关键词 崩落法; 流动特性; 影响因素; 数学模型 分类号 TD85 Influencing factors on the flow characteristics of an isolated extraction zone in caving mining SUN Hao，JIN Ai-bing ，GAO Yong-tao，ZHOU Yu，YANG Zhen-wei Civil and Environmental Engineering School，University of Science and Technology Beijing，Beijing 100083，China  Corresponding author，E-mail: jinaibing@ ustb． edu． cn ABSTＲACT Based on the particle flow theory and PFC3D code，a draw model with the meso-mechanical properties of ore granular media was constructed to study influencing factors on the flow characteristics of an isolated extraction zone in caving mining． Major factors that have significant influence on the flow characteristics of the isolated extraction zone and their sensibility and relationships with the flow characteristics were determined by statistical knowledge． Simultaneously，the suitability and reliability of the draw model based on PFC3D code and used in influencing factor research of the isolated extraction zone were validated by contrastive analysis between existing research conclusions and simulated results． The research results show that particle shape，friction coefficient，and drawpoint size are important parameters significantly influencing the flow characteristics of the caved ore and rock． In the initial stage of drawing，drawpoint size has the greatest influence on the form of the isolated extraction zone followed by friction coefficient and particle shape; in the following stage of drawing，particle shape has the greatest influence on the form of the isolated extraction zone followed by drawpoint size and friction coefficient． The drawing will be more difficult if the particle shape is more irregular，the inter￾nal friction angle of particles is larger and the drawpoint size is smaller． KEY WOＲDS caving mining; flow characteristics; influencing factors; mathematical models 收稿日期: 2014--07--16 基金项目: 国家自然科学基金资助项目( 51374032) ; 科技北京百名领军人才培养工程( Z151100000315014) 崩落采矿法在国内外金属矿山应用十分广泛，我 国黑色金属矿山地下采矿中使用崩落法采出的矿石量 高达 85% 以上，有色金属矿山使用崩落法采出矿石量 已达到 40% 左右，而国际上使用该方法进行开采的矿