Blast induced rock mass damage around tunnels

Verma, Harsh Kumar; Samadhiya, N. K.; Singh, Mahendra; Goel, Ramesh; Singh, Premlata

doi:10.1016/j.tust.2017.08.019

Cited by 120 publications

(59 citation statements)

References 21 publications

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“…In China, at present, the construction of mountain tunnels mainly adopts the drilling and blasting method which is a preferred method of rock excavation worldwide due to low initial investment, cheap explosive, and possibility to deal with different complex geologies [8][9][10]. Although the drilling and blasting method have been widely used in underground construction, the stability of mountain body and surrounding environment has been inevitably disturbed, and the groundwater system of the mountain has been greatly affected during blasting excavation, which could increase the risk of construction safety [11][12][13][14][15][16]. For shallow-buried tunnels, surface vibration caused by drilling and blasting is relatively large to reduce the impact of blasting on surrounding buildings, and ground vibration caused by blasting in the process of tunnel construction should be reasonably controlled.…”

Section: Introductionmentioning

confidence: 99%

Vibration Characteristic of High-Voltage Tower Influenced by Adjacent Tunnel Blasting Construction

Duan

Lin

Lai

et al. 2019

Shock and Vibration

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e effects of tunnel blast excavation on the adjacent existing high-voltage tower are comprehensively studied for the Chashan highway tunnel project as a case study. To investigate the effect of blast-induced vibration from the tunnel on the adjacent existing tower, field tests and numerical simulations method were adopted to study the vibration velocity and vibration frequency of the existing tower. Moreover, the relationship between the transverse distance from the detonation center and the peak velocity is discussed in detail. e results showed that the peak velocity of the measuring point in tower foundation increases with the distance between the detonation center and tower foundation approaches, and the maximum velocity is appearing when detonation center is 0 m. Furthermore, the corresponding energy spectrum distributions of the existing tower under the effect of blast induced by vibration is also analyzed, and the main frequency of vertical vibration is generally higher than that of transverse vibration. On combining the peak velocity with the main frequency and the natural frequency of the tower, the safety evaluation of the blasting area is proposed, and the corresponding control measures of blasting vibration are put forward. A guideline for the blast safety zone is proposed based on vibration velocity, main frequency, and the quantity of explosive.

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Section: Introductionmentioning

confidence: 99%

Vibration Characteristic of High-Voltage Tower Influenced by Adjacent Tunnel Blasting Construction

Duan

Lin

Lai

et al. 2019

Shock and Vibration

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show abstract

“…This classification is used for evaluating ultimate support pressure and reinforcement method for tunnel. Q system was chosen in many studies such as cement grouted rock mass evaluation [10] and blast induced rock mass investigation [11]. Sometimes, the rock mass rating and the rock mass quality were studied together [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Alternative Software for Evaluating Preliminary Rock Stability of Tunnel Using Rock Mass Rating (RMR) and Rock Mass Quality (Q) on Android Smartphone

Pantaweesak¹,

Sontamino²,

Tonnayopas³

2019

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Nowadays, tunneling is applied to a variety of constructions such as subway station, water supply tunnel and underground mine. Tunnel safety is one of the most important factors of construction. Most tunneling is operated in remote area that is difficult to reach. This research aims to develop an alternative software for Android smartphone, which use for estimating preliminary rock mass stability and suggesting support method for the early state tunnel. Suitable rock mass classifications for tunnel are rock mass rating (RMR) and rock mass quality (Q system). They are applied to the application. Android operating system is chosen because it is the most popular operating system in the world. The application is programmed by the official programming software from Google, the Android Studio. PSU-RQ is the name of this application. PSU-RQ is easy to use because it reduced the complexity of the theories by numerical logic. The application results are verified by comparing with Excel standard worksheet. PSU-RQ is reliable and accurate. The application is tested in a tunneling case study as an example. Whenever a smartphone is available, the user can estimate preliminary rock mass stability and support method of tunnel instantly. However, long-term stability investigation is necessary.

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“…Together, this would result in reduced bearing capacity and easier caving. Blasting is more frequently used in areas such as hydraulic engineering, hydropower, mining, and transportation, and it has been responsible for huge economic and social benefits [28][29][30][31]. Previous cases indicate that presplitting blasting exhibits better performances than others [17,32,33].…”

Section: Introductionmentioning

confidence: 99%

A Case Study of Presplitting Blasting Parameters of Hard and Massive Roof Based on the Interaction between Support and Overlying Strata

Zhang

Chen

2018

Energies

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Due to the existence of a hard and massive roof (HMR), severe ground pressure behaviors have been observed at the working face, resulting in safety issues and the degradation of production effectiveness. Based on the HMR conditions of the Datong Mining Area, the fracture-related instability of the HMR and its effects on the support selection were investigated by analyzing the interaction between support and overlying strata. Advancefixed-distance presplitting blasting (AFPB) technology was proposed to control the caving interval of HMR, and the influence of the controlled interval on the working load of supports was also analyzed. The working load of the support and the caving interval of the HMR were determined based on the controlled HMR fracture technology, and these were verified by field application tests. The working resistance of the support and the step distance were determined based on controlled roof fracture and were verified by on-site application experiments. The results revealed that cracks emerged after the presplitting blasting, resulting in significantly reduced strata behaviors. Furthermore, the support exhibited good adaptability.

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Blast induced rock mass damage around tunnels

Cited by 120 publications

References 21 publications

Vibration Characteristic of High-Voltage Tower Influenced by Adjacent Tunnel Blasting Construction

Vibration Characteristic of High-Voltage Tower Influenced by Adjacent Tunnel Blasting Construction

Alternative Software for Evaluating Preliminary Rock Stability of Tunnel Using Rock Mass Rating (RMR) and Rock Mass Quality (Q) on Android Smartphone

A Case Study of Presplitting Blasting Parameters of Hard and Massive Roof Based on the Interaction between Support and Overlying Strata

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