基于三维结构面网络模拟的某磷矿边坡岩体质量评价

Quality assessment on a phosphate rock slope based on 3D network simulation

岩石质量指标RQD是RMR、Q系统等岩体质量分类法中的基础参数,在岩体质量评价中应用广泛。然而,传统RQD获取方法与钻孔位置、方向、数量等密切相关,无法保证RQD的全面性与客观性。基于此,以贵州某磷矿边坡为研究背景,综合传统详细勘测线法与三维激光扫描法的岩体结构面现场实测结果,采用三维结构面网络模拟方法构建包含现场结构面信息的三维网络实体模型,从多个方位模拟计算研究区域的RQD,以获得更加准确客观的岩石质量指标,结果表明:整个南帮边坡岩体质量均为"一般",具有"上差下好"的特点。

Rock quality designation(RQD)is a basic parameter in rock quality classification by use of methods such as RMR and Q-system,which is widely used in rock quality assessment.However,the traditional RQD acquisition process is closely related to the location,orientation and number of boreholes,by which comprehensive and objective RQD could not be achieved.Because of this,the rock slope in a phosphate mine in Guizhou was taken as a research background,and the results of the rock structure surface measurement in the field by the traditional detailed survey line method and the 3 D laser scanning method were integrated,and the 3 D structural surface network simulation process was used to construct a 3 D network solid model containing the structural surface information in the field,as a result,the RQD in different areas was able to be calculated in multiple directions so as to obtain more accurate and objective rock quality designation.The results indicated that the RQD of whole south slope is common and features"good upper and bad lower".