节理边坡岩体参数获取与PFC^(2D)应用研究  

On obtaining jointed rock slope geo-parameters and the application of PFC^(2D)

作　　者：王培涛[1] 杨天鸿[1] 于庆磊[1] 刘洪磊[1] 张鹏海[1] 

机构地区：[1]东北大学深部金属矿山安全开采教育部重点实验室,资源与土木工程学院,辽宁沈阳110819

出　　处：《采矿与安全工程学报》2013年第4期560-565,共6页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(50904013,51174045);国家自然科学基金重点项目(51034001);教育部项目基本科研业务费项目研究生科研创新项目(N120601002);国家重点基础研究发展计划(973)项目(2013CB227902)

摘　　要：边坡稳定是决定露天矿山安全生产的前提,应用颗粒流方法研究边坡稳定性的首要任务是获得合理的边坡岩体强度参数。研究了应用于颗粒流的节理边坡岩体强度参数获取方法,应用点荷载仪及ShapeMetriX3D岩体数字测量技术进行边坡岩体调查,由修正Hoek-Brown准则得到岩体强度参数,最后通过宏细观参数标定确定相应的颗粒流细观参数。结合河北钢铁矿业公司黑山露天铁矿工程实例,建立边坡颗粒流模型,研究了挂帮矿回采中岩体的变形、失稳、破坏的整个过程,并与现场勘测结果和相似试验结果对比,得到的岩体破坏模式相似。Safety production of open-pit mine mainly depends on the stability of slope. The first step to investigate the stability of slope by using particle flow code is to obtain a series of reasonable character-istic parameters which are mainly controlled by strength of rocks and distribution of joints. By virtue of a project case in Heishan open-pit mine, one of the iron ore mines of Hebei Iron and Steel Group Min-ing Company （HBIS）, the application of an approach to obtain the characteristic parameters of jointed rock slope is presented in this paper. The strength of rock and distribution of joints were investigated by rock point load instrument system and ShapeMetriX^3D system separately. The Hoek-Brown failure crite- rion is found suitable to estimate geo-mechanical parameters. Then the values are applied to the nu-merical simulation of PFC^2D. Through this study, an vision of where the failure started, how it devel-oped and what the final failure looked like during the process of mining the hanging wall ore is put for-ward and the simulation results which are similar to the site survey and similarity models give a refer-ence to guide the slope deformation monitoring.

关 键 词：节理岩体边坡 PFC2D ShapeMetriX3D 强度参数 数值模拟 

分 类 号：TD313[矿业工程—矿井建设]