深水条件下钻孔爆破合理堵塞长度的数值研究  

Numerical study on reasonable plugging length for drilling blasting under deep water

作　　者：李启佳 邹永胜 LI Qijia;ZOU Yongsheng(Changjiang Chongqing Waterway Engineering Bureau,Chongqing 400010,China)

机构地区：[1]长江重庆航道工程局,重庆400010

出　　处：《水运工程》2024年第11期241-245,共5页Port & Waterway Engineering

摘　　要：合理的堵塞长度在深水条件下钻孔爆破时,不仅可以提高爆破效果,还能节约施工成本。为研究深水条件下钻孔爆破在不同水深时合理的堵塞长度取值,采用单一变量法,仅改变堵塞长度,结合三峡—葛洲坝两坝间莲沱段航道整治炸礁工程,运用ANSYS LS-DYN软件对水下钻孔爆破过程进行数值模拟研究。结果表明:随着水深的增大,岩体所受的水压力也相应增大,同时水压力可以替代部分堵塞,因此合理堵塞值应随着水深的增大而减小;在4种典型水深20、25、30、35 m条件下所对应的合理堵塞长度为140、120、100、80 cm;同一装药结构在不同水深处爆破时,合理堵塞值与水深成近似线性关系。When drilling blasting under deep water,a reasonable plugging length cannot only improve the blasting effect but also save construction cost.In order to study the reasonable value of plugging length for deep water drilling blasting under deep water conditions,we use a single variable method to only change the plugging length,and apply ANSYS LS-DYN software to conduct numerical simulation research on underwater drilling blasting combining with waterway regulation project of Liantuo River between the Three Gorges Dam and Gezhouba Dam.The results show that as the water depth increases,the water pressure on the rock mass also increases accordingly.The water pressure can replace part of the blockage.As a result,the reasonable plugging length should decrease with the increase of the water depth.Under the four typical deep water conditions of 20 m,25 m,30 m,and 35 m,the corresponding reasonable plugging lengths are 140 cm,120 cm,100 cm and 80 cm.When the same charge structure of the explosive drilling blasts at different water depths,the reasonable plugging length and water depth are approximately linearly related.

关 键 词：深水条件 水下钻孔爆破 ANSYS LS-DYN软件 合理堵塞长度 

分 类 号：U617[交通运输工程—船舶及航道工程]