我矿是一座设计年产90万t的矿井,随着放顶煤技术的应用,井下生产能力己达到200万t/a以上,提升系统客观存在着超载现象,运输能力不足成了制约矿井生产发展的主要因素。因此,对矿井提升系统进行技术改造势在必行。1主井提升系统现状及改造必要性1.1主井提升情况参数主井提升情况 Mine is a mine designed with an annual output of 900,000 t. With the application of top coal caving technology, the underground production capacity has reached over 2 million t / a, which increases objectively the overloading phenomenon of the system and the shortage of transportation capacity has become a constraint to mine production The main factor of development. Therefore, it is imperative to reform the mine hoisting system. 1 main shaft lifting system status quo and the need for transformation 1.1 main shaft lifting parameters of the main shaft to enhance the situation