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中央矿1985年开采磷灰石2820万吨。由于地形复杂,决定用深溜井主平峒准轨铁路运输系统开拓矿床。头几条溜井深600米,直径6米,用竖井掘进法自上而下掘进。在矿山投产时,2号溜井的掘进和装备业已竣工,但下部尚未刷大好矿仓。分四层向溜井掘进了检查矿位和以爆破法处理悬拱的通道,层间总高度取80米。装车峒室用混凝土支护,安装了风动指状闸门。在2号溜井投产后的头几个月内,由于
Central Mine mining apatite 28.2 million tons in 1985. Due to the complex terrain, it was decided to open up the ore deposit with the Pingtung standard rail transit system. The first few slippery wells 600 meters deep, 6 meters in diameter, with shaft boring method from top to bottom heading. When the mine was put into operation, the tunneling and equipment for No. 2 chute had been completed, but the lower part had not yet been cleaned. Divided into four layers to the slip well borehole inspection of mining and blasting arch hanging passage, the total height of the layer to take 80 meters. Loading room with concrete support, installation of pneumatic finger gate. In the first few months after the launch of the runway No. 2, due