A new excavation technology of blasting combined with TBM

The technical feasibility of drilling and blasting or TBM excavation method is the key to determine the underground engineering. In view of the high strength, high abrasiveness and good integrity of hard rock in site, and considering the damage of surrounding rock must be controlled within a reasona...

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Autores principales:	Ke Man, Xiaoli Liu, Zhifei Song
Formato:	article
Lenguaje:	EN
Publicado:	Taylor & Francis Group 2021
Materias:	blasting excavation tbm excavation pre-blasting combined method excavation efficiency Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Risk in industry. Risk management HD61
Acceso en línea:	https://doaj.org/article/31010f987f9346fa8b5f67e1ded33175
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id	oai:doaj.org-article:31010f987f9346fa8b5f67e1ded33175
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spelling	oai:doaj.org-article:31010f987f9346fa8b5f67e1ded331752021-11-26T11:19:48ZA new excavation technology of blasting combined with TBM1947-57051947-571310.1080/19475705.2021.1998231https://doaj.org/article/31010f987f9346fa8b5f67e1ded331752021-01-01T00:00:00Zhttp://dx.doi.org/10.1080/19475705.2021.1998231https://doaj.org/toc/1947-5705https://doaj.org/toc/1947-5713The technical feasibility of drilling and blasting or TBM excavation method is the key to determine the underground engineering. In view of the high strength, high abrasiveness and good integrity of hard rock in site, and considering the damage of surrounding rock must be controlled within a reasonable range, the blasting combined with TBM method has been proposed here. While the combined method has been further carried out in Water Supply Project in Jilin to assess and evaluate it, which including single-hole blasting, five-hole blasting, eleven-hole blasting and blasting combined with TBM tests. It is found that some certain blasting tests is useful and essential to the combined method, as it can provide the blasting parameters designed for the combined method. The blasting of multi-hole simultaneous initiation with interval charge structure should be adopted strictly. Meantime, one roll of explosive in each blasting hole can produce obvious blasting phenomenon. Simultaneously, by means of vibration monitoring, borehole TV observation and sound wave measurement, it can be judged that the damaged degree is rather small. After pre-blasting, the average speed of TBM driving is 17.41 mm/min, increased by 42.3% than that of the previous cycle. It shows that the new method not only achieves a relative efficient excavation, but also rock damage has been controlled. Moreover, the shortcomings of low speed and high tool wear of TBM excavation in hard rock could be avoided and the excavation efficiency could be improved using the combined method. Therefore, it seems to be a practical technology, which can play full advantages of each existed method, while can avoid the defects of themselves. However, this new excavation technology needs further confirmation through more engineering verification. The results obtained in this paper have guiding significance and promising application in the underground excavation and other civil engineering.Ke ManXiaoli LiuZhifei SongTaylor & Francis Grouparticleblasting excavationtbm excavationpre-blastingcombined methodexcavation efficiencyEnvironmental technology. Sanitary engineeringTD1-1066Environmental sciencesGE1-350Risk in industry. Risk managementHD61ENGeomatics, Natural Hazards & Risk, Vol 12, Iss 1, Pp 3205-3223 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	blasting excavation tbm excavation pre-blasting combined method excavation efficiency Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Risk in industry. Risk management HD61
spellingShingle	blasting excavation tbm excavation pre-blasting combined method excavation efficiency Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Risk in industry. Risk management HD61 Ke Man Xiaoli Liu Zhifei Song A new excavation technology of blasting combined with TBM
description	The technical feasibility of drilling and blasting or TBM excavation method is the key to determine the underground engineering. In view of the high strength, high abrasiveness and good integrity of hard rock in site, and considering the damage of surrounding rock must be controlled within a reasonable range, the blasting combined with TBM method has been proposed here. While the combined method has been further carried out in Water Supply Project in Jilin to assess and evaluate it, which including single-hole blasting, five-hole blasting, eleven-hole blasting and blasting combined with TBM tests. It is found that some certain blasting tests is useful and essential to the combined method, as it can provide the blasting parameters designed for the combined method. The blasting of multi-hole simultaneous initiation with interval charge structure should be adopted strictly. Meantime, one roll of explosive in each blasting hole can produce obvious blasting phenomenon. Simultaneously, by means of vibration monitoring, borehole TV observation and sound wave measurement, it can be judged that the damaged degree is rather small. After pre-blasting, the average speed of TBM driving is 17.41 mm/min, increased by 42.3% than that of the previous cycle. It shows that the new method not only achieves a relative efficient excavation, but also rock damage has been controlled. Moreover, the shortcomings of low speed and high tool wear of TBM excavation in hard rock could be avoided and the excavation efficiency could be improved using the combined method. Therefore, it seems to be a practical technology, which can play full advantages of each existed method, while can avoid the defects of themselves. However, this new excavation technology needs further confirmation through more engineering verification. The results obtained in this paper have guiding significance and promising application in the underground excavation and other civil engineering.
format	article
author	Ke Man Xiaoli Liu Zhifei Song
author_facet	Ke Man Xiaoli Liu Zhifei Song
author_sort	Ke Man
title	A new excavation technology of blasting combined with TBM
title_short	A new excavation technology of blasting combined with TBM
title_full	A new excavation technology of blasting combined with TBM
title_fullStr	A new excavation technology of blasting combined with TBM
title_full_unstemmed	A new excavation technology of blasting combined with TBM
title_sort	new excavation technology of blasting combined with tbm
publisher	Taylor & Francis Group
publishDate	2021
url	https://doaj.org/article/31010f987f9346fa8b5f67e1ded33175
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A new excavation technology of blasting combined with TBM

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