牛帅, 刘少伟, 樊克松,等.灰岩矿溜井开挖支护与降段爆破参数优化[J].河南理工大学学报（自然科学版）,doi:10.16186/j.cnki.1673-9787.2023060044

NIU S, LIU S W, FAN K S, et al.Optimization of parameters of excavation support and down-section blasting inlimestone ore pass[J].Journal of Henan Polytechnic University(Natural Science) ,doi:10.16186/j.cnki.1673-9787.2023060044

灰岩矿溜井开挖支护与降段爆破参数优化（网络首发）

牛帅1, 刘少伟1, 樊克松2, 李小鹏1, 郭泽政1

1.河南理工大学 能源科学与工程学院，河南 焦作  454000；2.河南理工大学 机械与动力工程学院，河南 焦作  454000

摘要:“贮矿降段法”是溜井口在露天矿中随露天开采向下进行而随之延伸的一种溜井降段方 法，维持溜井井壁的稳定性是生产过程中的重要环节，但溜井内部状态具有不可视性，基于某 灰岩矿溜井，采用数值模拟、理论分析与现场实际相结合的技术手段，分析溜井掘进后不同支 护条件下及多次爆破降段时井壁稳定性，揭示了掘进后和爆破降段时溜井的应力分布和井壁 破坏规律，确定了更为合理的支护条件，为爆破降段过程的安全性提供理论依据。研究表明： 在此灰岩矿溜井井口进行C40级混凝土支护可有效削弱日常爆破开采产生的震动对井口围岩 的破坏，确定爆破辅助孔底盘抵抗距3.5 m，孔距3.5 m，排距3.5 m时更加合理，可为爆破降段 过程的安全性提供理论依据和参考价值。

关键词:溜井;降段;爆破参考;井口支护;井壁稳定性

中图分类号: TD353;TD235

doi:10.16186/j.cnki.1673-9787.2023060044

基金项目:国家自然科学基金资助项目（52074102）；辽宁省自然科学联合开放基金资助项目（2022-KF-23-08）；河南省重点研发与推 广专项项目（232102221034）

收稿日期:2023-06-19

修回日期:2023-08-15

网络首发日期: 2023-10-12

Optimization of parameters of excavation support and down-section blasting inlimestone ore pass(Online)

NIU Shuai1, LIU Shaowei1, FAN Kesong2, LI Xiaopeng1, GUO Zezheng1

1.School of Energy Science and Engineering，Henan Polytechnic University，Jiaozuo，Henan  454000，China；2.School of Mechanical and Power Engineering，Henan Polytechnic University，Jiaozuo，Henan  454000，China

Abstract:"Ore storage drawdown method " is a method of drawdown of chute which extends along with openpit mining in open-pit mine.Maintaining the stability of the shaft wall of a chute is an important link in the production process，but the internal state of the chute is invisible.Based on a limestone mine chute，the technical means of numerical simulation，theoretical analysis and field practice are used to analyze the shaft wall stability under different support conditions after the chute excavation and multiple blasting downgrades， reveals the stress distribution and shaft wall failure law after tunneling and blasting in falling section，and determines the more reasonable supporting conditions. It provides a theoretical basis for the safety of blasting down section. The research shows that the C40 grade concrete support at the wellhead of the limestone mine can effectively weaken the damage to the wellhead surrounding rock caused by the vibration produced

Key words:chute;descending section;blasting reference;wellhead support;wall stability

CLC: TD353;TD235