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我矿于一九七九年十月二十三日至十一月二十二日的三十一天中,进行了开拓平巷(无支护)的独头快速掘进。经化工部矿山局组织有关单位进行检查验收,月进尺为626.44米,超过“攀高峰”竞赛的一级指标,创化工矿山独头无支护开拓平巷月进尺的最高纪录,工程质量合格。 一、施工巷道基本情况 这次施工的是244米中段运输平巷,该巷道沿走向布置在矿层底板的白云质板岩、硅质岩、白云岩中,这些岩层的硬度系数为
During the thirty-one days from October 23 to November 22, 1979, I Mine commenced a single-head fast heading tunnel (without support). The Ministry of Chemical Industry Mine Bureau organized inspection and acceptance of relevant units, the monthly footage of 626.44 meters, more than the “climbing peak” contest an indicator of the highest chemical and mining mines without support for the development of open roadway monthly record, the project quality standards. First, the basic construction roadway The construction of the middle 244 meters laneway, the roadway along the direction of the layout of the dolomite slate floor, silicalite, dolomite, the hardness of these rock formations is