RT info:eu-repo/semantics/article
T1 A new methodology to estimate the powder factor of explosives considering the different lithologies of volcanic lands: A case study from the island of Tenerife, Spain
A1 Miguel García, Eduardo de
A1 Gómez González, José  Francisco
K1 Powder factor
K1 Lithology
K1 Tunnel
K1 Blast
AB Many populations live on small islands where there are no naturally occurring rivers and lakes. Therefore, theyneed to look for underground water sources that involves the use of complex, expensive civil engineering operations which normally use explosives. An adequate prediction of the amount of explosive and performance ofblasts is essential for a proper drilling plan. In the present work, a new methodology is proposed to estimate theconsumption of explosives with respect to each type of rock drilled, based on a regression model that relates thegeomechanical characteristics of the rocks with the progress made with each blast. The model is obtained usingreal data from the drilling of 85.70 m in a water tunnel with a cross section of 4 m2 on a volcanic island. The blastused gelatin-based explosives based on nitroglycol, placed according to the drilling and blasting pattern fortunnels (structure to capture groundwater). The extracted rocks were mechanically characterized (density,porosity and point load strength index) and correlated with the powder factor. A methodology based on aregression model was constructed with this information that allows predictions of the powder factor, number ofblasts and the amount of explosive needed as a function of the geomechanical properties of the tested rocks. Theblasting progress had a non-linear relationship with the geomechanical parameters of the different lithotypes.The data show that advance is strongly non-linearly correlated with the porosity and the point load strengthindex of the rock. The regression model will be useful in the design of tunnel construction projects, as it canprovide a better estimation of duration and costs of civil works than those used at present.
PB Elsevier
SN 0886-7798
YR 2019
FD 2019
LK http://riull.ull.es/xmlui/handle/915/35687
UL http://riull.ull.es/xmlui/handle/915/35687
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 26-dic-2024