大孤山铁矿边坡岩体结构数字识别及力学参数研究  

Slope rock mass structure digital photogrammetry and research on mechanical parameter in Dagushan Iron Mine

作　　者：郑超[1] 杨天鸿[1] 刘洪磊[1] 于庆磊[1] 于天亮[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《煤炭学报》2011年第3期383-387,共5页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(10872046;50904013);教育部博士研究生科研创新项目(NO90601003)

摘　　要：针对目前岩体结构面信息获取主要以人工现场接触测量为主,劳动强度大、效率低下的现状,借助于先进的ShapeMetrix 3D三维数字摄影测量系统,对大孤山铁矿边坡岩体结构面进行摄影测量,对获取到的结构面进行分组、分析,得到结构面各种几何信息的详细数据,并对其进行数理统计计算、分析,拟合出结构面各种几何信息的概率分布模型。采用蒙特卡洛方法编制的程序和根据数字摄影测量系统得到的统计数据,模拟岩体内部结构面三维分布情况。在此基础之上,采用修正广义Hoek-Brown准则,估计节理化岩体强度,得到岩体强度指标。根据已获得的结构面三维分布情况和岩体强度指标综合评价了大孤山铁矿边坡岩体稳定性。A 3D contact-free measuring system（3GSM） was employed to acquire the geometrical information of rock mass structures of sandstone in the slope rock mass of Dagushan Iron Mine based on the present status which the discontinuities were mainly captured by human measurement contacting the rock at present with large amount of labors and low efficiency.Three-dimensional solid model of the slope surface was created,and then the geometric information of discontinuities was gotten from three-dimensional solid model by 3GSM.The probability distribution model of the traces,dip angle and dip orientation were build according to mathematical calculation of statistics for all kinds of geometric information of these discontinuities.By using the Monte-Carlo method,the three-dimensional model of the discontinuities in rock mass was established.On the basis,the strength of jointed rock mass was estimated with modified generalized Hoek-Brown strength criterion.

关 键 词：结构面 数字摄影测量 蒙特卡洛法 岩体参数表征 

分 类 号：TD861.1[矿业工程—金属矿开采]