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一 空场产生的原因及处理的必 要性 东北的有色金属矿山在敌伪统治时期多用留矿法或空场法开采,其中前者占大多数例如:石嘴子、天宝山、华铜、青城子、芙蓉、桓仁等矿。 这两种方法采矿技术简单,不该用留矿法的矿床也采用此法,结果在放矿後留下大量空场及矿柱。 目前有的矿山已经开始用中段法。由於中段法采矿具有很多优点,它的使用前途是根广泛的,这一点从苏联的采矿工业上巳得到证实。
The causes of an empty field and the need for handling Northeast non-ferrous metal mines in the rule of the enemy during the relics or the use of open-field mining method, of which the former accounted for the majority, for example: Shizuizi, Tianbao Mountain, Hua Tong, Qingchengzi, Furong, Huanren and other mines. These two methods are simple in mining technology and should not be used in mineral deposits. This method also results in a large number of empty fields and pillars left after ore drawing. At present, some mines have started to use the middle method. As the mid-section mining has many advantages, its use is broad-based, as evidenced by the Soviet mining industry.