瓮福磷矿大塘矿阶段空场嗣后充填采场结构参数设计  

Design of Structural Parameters for the Subsequent Infill Quarry at the Urnford Phosphate Mine Stage Void Field

作　　者：向品倪 XIANG Pinni

机构地区：[1]七冶建设集团贵州化工建设有限责任公司,贵州贵阳550014

出　　处：《中国矿山工程》2023年第3期19-25,共7页China Mine Engineering

摘　　要：大直径深孔阶段空场嗣后充填法是开采倾斜极厚矿体安全有效方法,合理的采场结构参数是维持采场稳定的前提。以瓮福磷矿白岩矿区大塘矿为工程背景,采用Mathews稳定图法确定了一步骤采场结构参数,基于“隔一采一”的回采方案,利用数值软件FLAC^(3D)研究了采场稳定性。结果表明,一步骤和二步骤采场结构参数均为45 m×15 m×30 m条件下,充填体及周围矿房均未达到其临界破坏强度,采场结构参数合理。研究结果为倾斜极厚矿体的安全回采提供了理论支撑。The large-diameter deep hole stage void field followed by filling is a safe and effective method for mining inclined very thick ore bodies,and a reasonable mining field structure parameter is a prerequisite for maintaining the stability of the mining field.The structural parameters of the one-step mining field were determined by the Mathews stability diagram method,and the stability of the mining field was investigated by the numerical software FLAC^(3D) based on the"one step at a time"recovery scheme.The results show that the structural parameters of the one-step and two-step quarries are both 45 m×15 m×30 m.The filling body and the surrounding mine house do not reach their critical damage strength,and the quarry structural parameters are reasonable.The results of the study provide theoretical support for the safe recovery of inclined very thick ore bodies.

关 键 词：阶段空场嗣后充填法 倾斜极厚矿体 Mathews稳定图法 采场结构参数 

分 类 号：TD853[矿业工程—金属矿开采]