矿业科学学报2025，Vol.10Issue(6)：1090-1099,10.DOI:10.19606/j.cnki.jmst.2025053
内排边界约束影响下端帮陡帮开采方法研究
Mining methods of steep end-slope under the influence of internal dump boundaries
摘要
Abstract
In open-pit mining,technological and safety requirements often result in relatively shallow slopes at the end walls,leaving substantial coal resourcesburied and unutilized.The partitioned mining with internal dumping,however,shortens the exposure time of the end-wall slopes due to the advance-ment of the internal dumping field,providing conditions for increasing the slope angle.This study pro-poses an optimal steep slope mining method for end walls to maximize the slope angle,enhance re-source recovery,explore the feasibility of steep slope mining,and optimize platform parameters.Taking the west end wall of a certain open-pit mine as a case study,we analyzed the impact of increasing the end-wall slope angle on stability under different slope configurations,and revealed the dynamic rela-tionship between the development of the internal dumping field and the end-wall slope.For the first time,this study integrated the internal dumping boundary constraints and time-dependent slope theory to derive a stability calculation method for end-wall slopes under the dynamic advancement of the inter-nal dumping field.We probed into the influence of internal dumping boundary constraints on the stabil-ity and its variation characteristics A numerical model was developed for the end-wall internal dumping boundary constraints to analyze the evolution of slope stability,displacement,and sliding surface area at different intervals of internal dumping advancement.results indicate that,taking a convex slope as an example,as the internal dumping field gradually advanced,the displacement zone of the end-wall slope became increasingly concentrated,and the peak displacement of the upper slope gradually de-creased.Within the limit of internal dumping advancement,the stability improvement rate of the end-wall slope increased with decreasingtracking distance of the internal dumping field.Specifically,for ev-ery 100 meters reduction in the tracking distance,the displacement zone area of the end-wall slope de-creased by 10.37%,and the rate of peak displacement reduction in the upper slope increased by 8%.关键词
陡帮开采/边坡稳定/内排边界/时效边坡Key words
steep slope mining/slope stability/inner row boundary/time-dependent slope分类
矿业与冶金引用本文复制引用
马力,李蒙博,毕银丽,彭苏萍,李胤达,赵旭龙,常治国,于春雨..内排边界约束影响下端帮陡帮开采方法研究[J].矿业科学学报,2025,10(6):1090-1099,10.基金项目
陕西省自然科学基础研究计划(2024JC-YBMS-364) （2024JC-YBMS-364）
国家重点研发计划(2022YFF1303302) （2022YFF1303302）
新疆煤炭资源绿色开采教育部重点实验室开放课题(KLXGY-KB2508) （KLXGY-KB2508）
