近年来,随着经济体制改革的深入发展,实行总承包后的煤炭企业坚持以经济效益为中心,使企业改革逐步深化,使煤炭经济持续发展. In recent years, along with the deepening development of the economic reform, the coal enterprises after the implementation of the general contract have insisted on economic benefits as the central task, deepening the reform of enterprises and making the coal economy develop continuously.