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Title: Modeling of Blast Induced Damage Distance for Underground Tunnels
Authors: Maheshwari, Priti
Murmu S.
Verma H.K.
Patel S.
Solanki C.H.
Reddy K.R.
Shukla S.K.
Published in: Lecture Notes in Civil Engineering
Indian Geotechnical Conference, IGC 2019
Abstract: One of the terminology which quantifies the amount of damage to the tunnel face, invert, crown, and sidewall is damage distance. It is the minimum distance where blast provoked discontinuities are formed beyond the periphery of newly excavated face. This distance mostly contains the unnatural discontinuities developed due to blasting. In order to cater to the uncertainties and prediction of large numbers of outcomes for different combinations of controllable and uncontrollable parameters, probabilistic analysis has been carried out in this study. As input for probabilistic analysis, the controllable parameters taken into considerations are maximum charge per delay (W), perimeter charge factor (P), specific charge (q), and as uncontrollable parameters rock quality index (Q). Data has been compiled from the literature pertaining to three different underground tunnels. The relationship between damage distance and the input parameters have been determined by drawing scatter plots implementing simple regression. These input have then been used to develop a deterministic model for prediction of damage distance. Following this, the probabilistic analysis employing Monte-Carlo (MC) simulation has been carried out. The existing blast design has been found to have 100% probability of occurrence for damage distance greater than 1 m. The occurrence of 1 and 2 m damage distance has been found to be inevitable. In order to mitigate the intensity of damage distance, a proper blast design can be chosen by trial methods implementing probabilistic analysis. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
Citation: Lecture Notes in Civil Engineering (2021), 137 LNCE: 617-626
Issue Date: 2021
Publisher: Springer Science and Business Media Deutschland GmbH
Keywords: Blasting
Damage distance
Monte-carlo simulations
Underground tunnels
ISBN: 9.78981E+12
ISSN: 23662557
Author Scopus IDs: 56279208800
Author Affiliations: Maheshwari, P., Indian Institute of Technology Roorkee, Roorkee, India
Murmu, S., Indian Institute of Technology (ISM) Dhanbad, Dhanbad, India
Verma, H.K., CSIR—Central Institute of Mining and Fuel Research, Regional Centre, CBRI Campus, Roorkee, India
Corresponding Author: Maheshwari, P.; Indian Institute of Technology RoorkeeIndia; email:
Appears in Collections:Conference Publications [CE]

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