节理岩体矿岩块度三维模拟研究  

Study on 3D Simulation of Rock Fraghmentation for Jointed Rock Mass

作　　者：荆永滨 赵新涛 冯兴隆 JING Yongbin;ZHAO Xintao;FENG Xinglong(School of Safety Engineering,Henan Institute of Engineering,Zhengzhou 451191,Hunan,China;Yunnan Diqing Non-ferrous Metals Co.,Ltd.,Shangri-La 674400,Yunnan,China)

机构地区：[1]河南工程学院安全工程学院,河南郑州451191 [2]云南迪庆有色金属有限责任公司,云南香格里拉674400

出　　处：《黄金科学技术》2018年第3期357-364,共8页Gold Science and Technology

基　　金：金属矿山安全与健康国家重点实验室开放课题项目"基于岩体表面节理分布的节理三维网络模拟研究"(编号:2017-JSKSSYS-02);河南省科技攻关项目"基于图像和块体形状分类的岩石块度分析方法研究"(编号:172102310643);河南省科技开放合作项目"动态应力下煤层底板裂隙演化及水渗流突变机理研究"(编号:172106000073)联合资助

摘　　要：为实现矿岩块度预测的三维可视化模拟,根据岩体内节理面倾向、倾角和节理间距等几何参数的分布规律,采用Boost Random库实现节理面Monte Carlo随机模拟,从而建立原始块度预测的节理素描文件,然后引入崩落块度修正系数计算崩落块度预测的节理素描文件。根据节理素描文件数据计算三维节理面网络,逐个取出节理面平面,对模拟范围的长方体模型进行切割,建立块度三维模型。利用块度三维模型分别计算块体的容积系数和共线性值,对块体进行形状分类。结合VTK库和HOOPS 3D实现上述算法,以普朗铜矿自然崩落法为例对首采区原始块度进行预测:块体体积的四分位点分别为0.164,0.403,0.853 m^3,块体等效尺寸在0.5~3.0 m区间时块体占较大的体积百分比;同时,根据块体等效尺寸分布曲线得到放矿口的尺寸应大于5 m×5 m。研究结果表明:该方法能够根据现场节理面调查结果模拟岩体内节理分布,进而利用矿岩块度三维模型实现矿岩块度的预测和统计分析,为自然崩落法开采研究提供了重要依据。In order to achieve 3D visualization simulation of rock fragmentation prediction,the key techniques were proposed.According to the distribution regularity of rock mass joint geometrical parameters,including joint inclination,dip angle and joint spacing,Boost Random library was used to realize the Monte Carlo random simulation of joint surface,so as to establish joint sketch file for original fragmentation prediction,and then the correction coefficient of caved fragmentation was introduced to create the joint sketch file for caved fragmentation prediction.3D joint surface network was calculated according to the data of joint sketch file.Then the joint network was used for creating the 3D fragmentation model by cutting the cuboids model that covering the simulation region.Volume coefficient and colinearity of each block were calculated by 3D fragmentation model and used for block shape classification.The algorithms above were implemented with VTK library and HOOPS 3D.Fragmentation simulation for block caving method was performed at Pulang copper mine to study the fragmentation distribution law at initial mining district.The quartiles of the block volume are 0.164 m3,0.403 m3 and 0.853 m3,respectively,and when the fragmentation equivalent size is in the range of 0.5~3.0 m,the blocks occupy a larger volume percentage.Furthermore,the size of draw hole was proposed as 5 m×5 m according to fragmentation equivalent size distribution curve.The result show that the method can simulate the distribution of joints in rock mass according to the survey results of on-site joints,and then prediction and statistical analysis the fragmentation are made by 3D fragmentation model.It provides an important basis for the study of block caving mining method.

关 键 词：自然崩落法 块度预测 Monte CARLO模拟 节理网络 块度模型 VTK 块体形状分类 

分 类 号：TU452[建筑科学—岩土工程] TP391[建筑科学—土工工程]