煤炭与化工2025，Vol.48Issue(6)：6-12,7.DOI:10.19286/j.cnki.cci.2025.06.002
新集一矿特坚硬顶板超前爆破弱化技术研究
Research on advanced blasting weakening technology for hard roof of Xinji Mine
焦金宝 1赵江梅 2李迎富2
作者信息
- 1. 中煤新集能源股份有限公司,安徽淮南 232001
- 2. 安徽理工大学,安徽淮南 232001
- 折叠
摘要
Abstract
In order to address the difficulties in roof caving and large-scale hanging roof in areas with particularly hard roof strata during mining operations,advanced blasting techniques were employed to weaken the strata,ensuring safe extraction in the work area.Based on the tested parameters of the roof strata and rock blasting theory,the radius of the blasting fracture zone was calculated.Using the finite element software ANSYS-LS/DYNA,the relationship between the Von Mises stress peak and the dynamic compressive strength of the rock was determined,and the spacing between blastholes was established.Additionally,an AB material plugging technique was designed to simplify the plugging process,significantly reducing the blasting waiting time.The maximum plugging length was calculated,and a formula for the minimum plugging length was derived.Based on this,blasthole parameters for No.360606 Face ventilation and access tunnels were designed,maintaining a periodic step distance of about 15.8 meters during the excavation period,effectively preventing hanging roof occurrences and ensuring excellent blasting results with no misfires.关键词
特坚硬顶板/爆破裂隙区半径/AB料封孔工艺/封孔长度/爆破参数设计Key words
particularly hard roof strata/blasting fracture zone radius/AB material plugging technique/plugging length/blast parameter design分类
矿业与冶金引用本文复制引用
焦金宝,赵江梅,李迎富..新集一矿特坚硬顶板超前爆破弱化技术研究[J].煤炭与化工,2025,48(6):6-12,7.
