Emergency plan methodology for mine fire simulations in Chuquicamata underground mine

Abstract

ABSTRACT The main objective of this study is to use fire risk analysis (FRA) as input to fire simulations to support development of a fire emergency plan strategy (EPS) at the Chuquicamata underground mine in Chile. This paper also describes how to classify zones that will be affected by fumes and gas propagation from the exact location of a fire event. The fire simulation study helps to determine the impact of a fire on a ventilation system, with the main purpose of providing relevant information to complement emergency plans and established control techniques in ventilation design and operation. Most fire simulation studies only concentrate on simulation techniques themselves, but this work moves beyond to ask: “What is the next step in developing an emergency plan? How can we evaluate, classify, and treat risky areas?” This study is primarily focused on the phases before and after a fire simulation process corresponding to a good FRA and how output data can be utilized for an EPS. Under construction since 2013, the Chuquicamata underground mine is one of the main projects for the Chilean government copper company, Codelco. It presents a solution to the lower production levels associated with open-pit mining and prolongs the life of the mine for the next 40 years, until 2060. Currently, approximately 2,000 workers operate in the Chuquicamata mine daily. Dozens of trucks and heavy machines drive through all main routes and accesses in the mine. Since the mine is still under construction, not all infrastructure necessary to operate safely in the mine has been completed. Risk of a truck or fixed facility fire is always a challenge. One important aspect of fire simulation relies on what we can do to prevent a fire and what can be done with the existing infrastructure to control a declared fire and initiate evacuation plans. This study presents a feasible emergency plan to implement in a mine under construction where limited resources are available. Several fire scenarios support the emergency plan strategy and a detailed step-by-step procedure indicates the elements of the fire emergency plan and risk analysis.