摘要
充分认识新奥法的岩承理念,运用爆轰波和地震波的传播规律,采用非对称复式掏槽和分区组合起爆网络,有效地分解爆破作业中的最大单段药量;在土石分界围岩浅埋段隧道掘进爆破中提出了导管要长、扰动要轻、周边要控、测量要全、锁脚要够、支护要快、仰拱要跟的七项原则下合理进尺,由传统的每循环0.6 m提高到2.4 m,缩短了工期并节约了成本。
With a full understanding of the NATM＇ s Theory of Rock Pressure, in the paper, the propagation law of seismic and detonation waves was used, the unsymmetrical compound slotting and blasting network with zonal combination were adopted, so as to disintegrate the maximum single unit of explosive quantity in explosion work. The reasonable step-length was determined according to seven principles, namely, maximum pipe length, minimum turbulence movement, control of the surrounding, full measurement, enough lock-pipe, quick support, instant inverted arch. The circulation speed would be upgraded from original 0.6 m to 2.4 m, this would reduce the duration and cost.
作者
屈海滨
胡伟
杨克群
马玉罄
Qu Haibin;Hu Wei;Yang Kequn;Ma Yuqing(China Railway 20th Bureau Group 4thEngineering Co. Ltd. , Qingdao Shandong 266061, China;Dalian North City Blasting Engineering Co. Ltd. , Liaoning Dalian 116033, China)
出处
《铁道建筑技术》
2018年第5期64-67,共4页
Railway Construction Technology
基金
中铁二十局集团有限公司科技研发项目(2016-06)
关键词
复式掏槽
分区组合
土石分界
合理进尺
钻爆
compound slotting
zonal combination
earth and stone division
proper step-length
drilling and blasting
