深埋地下厂房开挖程序及轮廓爆破方式比选研究

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (315 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract A reasonable excavation procedure and contour blasting method is one of the key techniques for construction of deep underground powerhouse. Firstly，the excavation procedures and contour blasting methods adopted for the underground powerhouses of large-scale hydropower stations under building or completed are summarized and analyzed. Secondly，based on the analysis of the propagation of cracks driven by explosion gases during contour blasting，and taking into account the combined effects of initial in-situ stress of surrounding rock mass and the adjacent blast holes，the possibility of stable propagation of pre-split cracks under confinement of high lateral in-situ stress is demonstrated. The results show that the in-situ stress of surrounding rock mass is a main factor to control the crack propagation for pre-split blasting. When the lateral in-situ stress vertical to the axis of underground powerhouse is larger than 10–12 MPa，it is not feasible to employ an excavation procedure of pre-split first followed by the main rock excavation. Alternatively，an excavation procedure of middle cut blasting carried out first，followed by pre-split or smooth blasting is recommended.

Key words： rock mechanics underground powerhouse excavation procedure pre-split blasting smooth blasting in-situ stress

Received: 23 December 2010

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors

Cite this article:

URL:

https://rockmech.whrsm.ac.cn/EN/Y2011/V30/I8/1531

[1]	李友华，黄应军，李景元. 溪洛渡水电站左岸地下厂房大跨度高边墙开挖施工技术[J]. 水力发电，2008，34(9)：9-12.(LI Youhua，HUANG Yingjun，LI Jingyuan. Excavation techniques of large-span and high sidewall of left-bank underground powerhouse of Xiluodu hydropower station[J]. Water Power，2008，34(9)：9-12.(in Chinese)) " target="_blank">
[2]	蒋健，周宇，和孙文. 大型洞室群开挖爆破技术[J]. 工程爆破，2003，9(1)：38-42.(JIANG Jian，ZHOU Yu，HE Sunwen. Blasting techniques for excavation of large-scale underground tunnels and chambers[J]. Engineering Blasting，2003，9(1)：38-42.(in Chinese)) " target="_blank">
[3]	和孙文. 龙滩水电站大跨度地下厂房开挖施工技术[J]. 水力发电，2003，29(10)：61-64.(HE Sunwen. Excavation technique of large span underground powerhouse for Longtan hydropower station[J]. Water Power，2003，29(10)：61-64.(in Chinese)) " target="_blank">
[4]	李善忠，杨天吉，曾浩. 龙滩水电站地下厂房开挖技术[J]. 水力发电，2005，31(4)：57-59.(LI Shanzhong，YANG Tianji，ZENG Hao. Summary on excavation technology about underground powerhouse of Longtan hydropower station[J]. Water Power，2005，31(4)：57-59.(in Chinese)) " target="_blank">
[5]	朱骏发，张朝康，龙选民. 二滩水电站地下厂房的开挖与支护[J]. 水力发电，1997，23(8)：47-49.(ZHU Junfa，ZHANG Chaokang，LONG Xuanmin. The excavation and support of Ertan hydropower station underground powerhouse[J]. Water Power，1997，23(8)：47-49.(in Chinese)) " target="_blank">
[6]	陈仁峰，郑平，张晓林. 瀑布沟水电站大型地下厂房快速开挖施工技术研究[J]. 四川水力发电，2008，27(12)：35-39.(CHEN Renfeng，ZHENG Ping，ZHANG Xiaolin. The study for rapid excavation construction technique of large-scale underground powerhouse about Pubugou hydropower station[J]. Sichuan Water Power，2008，27(12)：35-39.(in Chinese)) " target="_blank">
[7]	任少铭，曾志全. 小湾水电站地下厂房开挖技术[J]. 水力发电，2008，34(8)：43-45.(REN Shaoming，ZENG Zhiquan. Excavation technology of underground powerhouse of Xiaowan hydropower station[J]. Water Power，2008，34(8)：43-45.(in Chinese)) " target="_blank">
[8]	苗胜坤，牛运华，张新华. 水布垭地下厂房系统开挖支护施工经验[J]. 人民长江，2007，38(7)：60-61.(MIAO Shengkun，NIU Yunhua，ZHANG Xinhua. The excavation and support construction experience about underground powerhouse system of Shuibuya hydropower station[J]. Yangtze River，2007，38(7)：60-61.(in Chinese)) " target="_blank">
[9]	白帆，贺钰钏，王晓辉. 拉西瓦水电站地下厂房开挖分层及顶拱的开挖支护[J]. 水力发电，2007，33(11)：77-80.(BAI Fan，HE Yuchuan，WANG Xiaohui. Delamination excavation of machine hall cavern and excavation and support of the caverns arch crown for Laxiwa hydropower station[J]. Water Power，2007，33(11)：77-80.(in Chinese)) " target="_blank">
[10]	尹强，杨建军. 向家坝电站地下厂房系统洞室开挖方法[J]. 四川水力发电，2009，28(4)：1-6.(YIN Qiang，YANG Jianjun. Cavern excavation method for underground powerhouse complex at Xiangjiaba hydropower station[J]. Sichuan Water Power，2009，28(4)：1-6.(in Chinese)) " target="_blank">
[11]	尹俊宏，陈敦科. 大断面开挖成型控制技术在三峡工程中的应用[J]. 岩土力学，2007，28(增1)：465-468.(YIN Junhong，CHEN Dunke. Application of the excavation controlling techniques of large-section in the Three Gorges Project[J]. Rock and Soil Mechanics，2007，28(Supp.1)：465-468.(in Chinese)) " target="_blank">
[12]	曾伟，苗建杰，陈世庄. 糯扎渡水电站地下引水发电系统的施工方法[J]. 水力发电，2005，31(5)：61-65.(ZENG Wei，MIAO Jianjie，CHEN Shizhuang. Construction of underground water diversion and power generation system of Nuozhadu hydropower station[J]. Water Power，2005，31(5)：61-65.(in Chinese)) " target="_blank">
[13]	刘明昌，段汝健，叶式穗，等. 锦屏水电站地下厂房岩锚梁岩台开挖支护技术[J]. 人民长江，2009，40(18)：48-50.(LIU Mingchang，DUAN Rujian，YE Shisui，et al. The excavation and support technology about rock anchor beam and rock bench of the underground powerhouse of Jinping hydropower station[J]. Yangtze River，2009，40(18)：48-50.(in Chinese)) " target="_blank">
[14]	张建均. 锦屏二级水电站地下厂房岩锚梁施工[J]. 水利水电技术，2008，39(11)：49-51.(ZHANG Jianjun. Construction of rock anchored beam of underground powerhouse for Jinping II hydropower station[J]. Water Resources and Hydropower Engineering，2008，39(11)：49-51.(in Chinese))
[15]	KUTTER H K，FAIRHURST C. On the fracture process in blasting[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1971，8(2)：181-202. " target="_blank">
[16]	张正宇，张文煊，吴新霞，等. 现代水利水电工程爆破[M]. 北京：中国水利水电出版社，2003：132-138.(ZHANG Zhengyu, ZHANG Wenxuan，Wu Xinxia，et al. Modern blasting for water resources and hydropower engineering[M]. Beijing：China Water Power Press，2003：132-138.(in Chinese)) " target="_blank">
[17]	NILSON R H，PROFFER W J，DUFF R E. Modelling of gas-driven fracture induced by propellant combustion within a borehole[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1985，22(1)：3-19. " target="_blank">
[18]	卢文波，陶振宇. 爆生气体驱动的裂纹扩展速度研究[J]. 爆破与冲击，1994，14(3)：264-268.(LU Wenbo，TAO Zhenyu. A study of fracture propagation velocity driven by gases of explosion products[J]. Explosion and Shock Waves，1994，14(3)：264-268.(in Chinese)) " target="_blank">
[19]	卢文波. 三峡工程临时船闸与升船机开挖中的爆破方案优化和爆破振动控制[J]. 岩石力学与工程学报，1999，18(5)：516-519.(LU Wenbo. Optimization of blasting procedure and vibration control during excavation of temporary ship lock and ship lift in Three Gorges Project[J]. Chinese Journal of Rock Mechanics and Engineering，1999，18(5)：516-519.(in Chinese))