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利用本井开采立井井筒煤柱(简称井柱)的开采技术,在最近20多年得到了较快的发展,从开采即将报废矿井的井柱发展到开采正常生产矿井和在建矿井的井柱;从开采风井井柱到开采主、副井井柱;从只用充填法开采到用冒落法开采;从开采地质及水文地质条件简单的井柱到开
The technology of exploiting this shaft to mine vertical shaft coal pillar (referred to as shaft) has developed rapidly in recent 20 years, from the development of the shaft of the soon-to-be-derelict mine shaft to the production of the well shafts of the normal production and construction mines; From the exploitation of wind shaft to the main and auxiliary shaft; from mining only to mining by caving method; from the simple column of geology and hydrogeology to the exploitation of well