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无底柱分段崩落采矿方法中的切割拉槽工作,是该采矿方法生产工艺过程中的重要一环。一条回采进路(或一个分段水平)能否进行正常地回采,与切割拉槽的质量有着直接关系,因为切割槽是进路回采的最初挤压爆破补偿空间。我们自1967年使用无底柱分段崩落采矿方法以来,经过多年的生产实践证明:凡是切割槽爆破效果理想的,该进路回采工作就顺利,而且均能达到设计的各项技术经济指标;反之,进路回采就会产生悬顶、立槽、大块既大又多等爆破异常现象,严重地影响生产和各项经济指标的完成。
The method of cutting the groove in the pillarless caving mining method is an important part of the production process of the mining method. Whether a recovery channel (or a segment level) can be normally recovered is directly related to the quality of the cutting slot because the cutting slot is the initial squeeze-out compensation space for the recovery of the route. Since 1967, we have used the pillarless subsidence mining method. After many years of production practice, it is proved that all the blasting blasting works well and the reclamation work is smooth and all the technical and economic indexes of the design can be achieved. On the other hand, there will be anomalous blasting phenomenon such as hanging top, vertical groove, large and large chunks, etc., which will seriously affect the completion of production and various economic indicators.