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洛阳奕川钼业公司三道疃5000t／d露采工程采用山坡出入沟、开段沟──汽车运输──坑外破碎──溜井──平峒──汽车外运的开拓运输方式，于1990年底开始基建施工。随着台阶水平的下降，80年代在矿区乱采乱挖留下的53个地下采空区的重大隐患日渐突出。为了处理来空区，施工中
Luoyang Yi Chuan Molybdenum Co., Ltd. Three Road 5000t / d open pit mining project using the slope out of the ditch, the opening ditch ─ ─ ─ ─ ─ ─ out of the pit pitchuting Pingdingshan ─ ─ car out of the car to open transport mode, at Infrastructure construction started by the end of 1990. With the decline of the level of the staircase, the major hidden dangers of 53 underground mined-out areas left by mining in the mining area in the 1980s have become increasingly prominent. In order to deal with the area, construction