矿业科学学报2024，Vol.9Issue(4)：483-492,10.
倾斜中厚矿体阶段空场嗣后充填采矿工艺优化研究
Optimization of mining method for stage open-stoping with backfill of inclined medium-thick orebody
摘要
Abstract
The open field subsequent filling method in segmented drilling stage is an efficient mining method for inclined medium thick ore bodies.However,blasting,filling and stope stability show complex relationships,causing surface subsidence,roof and floor collapse,and high mining loss rate.This study adopts engineering analogy and industrial experiments to optimize the process of the sublevel drilling and stage open-stoping with backfill of inclined medium thick ore bodies in the aspects of mining se-quence,cutting method,and bottom structure layout,and propose a layout method without leaving pillars in the stope.This method directly connects the side walls of the filling body to the chamber after one-step of filling,and improves the strength of the filling body and the recovery rate of the ore block through extrusion blasting.As the key to this method lies in the implementation time,numerical simula-tion using ANSYS/LS-DYNA shows that medium-depth hole extrusion blasting is used to form cutting grooves,it should be carried out between 7～9 d after filling and curing of the filling body in the stope.Engineering practice has proved the feasibility of this method,which provides technical support for mining production.关键词
倾斜中厚矿体/分段凿岩阶段空场嗣后充填法/切割槽/底部结构/ANSYS/LS-DYNAKey words
tilted medium-thick ore body/open field subsequent filling method in segmented drilling stage/cutting groove/bottom structure/ANSYS/LS-DYNA分类
矿业与冶金引用本文复制引用
黄敏,王晓军,邱纪香,谷亚州,蔡思杰,黄明清..倾斜中厚矿体阶段空场嗣后充填采矿工艺优化研究[J].矿业科学学报,2024,9(4):483-492,10.基金项目
国家自然科学基金(51804079) （51804079）
福建省自然科学基金(2019J05039) （2019J05039）
紫金矿业集团股份有限公司2022年科技计划(5401KY2022100003) （5401KY2022100003）
