我公司矿井即刘桥二号井,原矿井设计生产能力为60万t/a,1995年矿井改扩建,其生产能力扩大到120万t/a。原主井在直径为5m的井筒内布置一套6t钢结构箕斗,采用单绳缠绕式提升机提升,钢丝绳罐道。1998年对主井提升箕斗进行了改造,将6t钢结构箕斗更换为7t铝合金结构箕斗,矿井生产能 My company is the second mine shaft Liuqiao, mine design and production capacity of 600,000 t / a mine in 1995, re-expansion of mine, its production capacity expanded to 1.2 million t / a. The original main shaft in the diameter of 5m wellbore layout of a set of 6t steel structure bucket, single rope winding hoist, wire rope tank. In 1998, the main shaft hoisting bucket was remodeled to replace the 6t steel deck with a 7t aluminum alloy bucket, and the mine production capacity