Compañía Minera San Esteban Primera Piñera said on October 12 that "the mine will remain closed until security measures that guard the life and dignity of the workers are established." Compañía Minera San Esteban Primera Compañía Minera San Esteban Primera (San Esteban Primera Mining Company) is a Chilean mining company, dedicated to the production of copper and gold concentrates. San Esteban's headquarters are located in Providencia, Santiago Metropolitan Region. San Esteban also owns the San José Mine in Copiapó, Chile, where 33 miners were trapped underground for 69 days after a mining accident on August 5, 2010. Chile has a long tradition in mining, which
SB-33 mine SB-33 mine The SB-33 is a small Italian minimum metal blast type anti-personnel mine formerly manufactured by "Misar", that entered service in 1977. The SB-33 can be emplaced by hand or scattered using the helicopter mounted SY-AT system. The body of the mine is made of two glass reinforced polycarbonate halves, with the top surface having a central neoprene pressure pad. The body has an irregular shape to make the mine harder to distinguish on the ground. To arm an SB-33, a small pin is removed from the side of the mine. After the mine has been armed, gradual pressure