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本文叙述了在预控顶爆力运搬采矿方法试验中,遇到欲切槽部位的矿体无法就地钻孔或打浅眼,因地制宜地采用了多排多向微差爆破一次大规模掏槽方法,取得了良好效果。我国地下矿深孔、中深孔爆破作业的掏槽方法,几乎都是以切割天井、切割巷道或拉底层为自由面,沿矿房或分段全宽,分次或一次单排单向顺序爆破进行的。这一惯例,我们本拟在这次爆力运矿掏槽试验中予以沿用,但因掏槽区段的矿体,几经人们乱挖滥采,原切割巷道的
This paper describes the precontrolled top blasting transport method of mining experiments, encountered to grooving parts of the ore body can not drill or play shallow drilling, according to local conditions using a multi-row multi-directional micro-blasting a large-scale dig Slot method, and achieved good results. In our country underground mine deep hole, medium-deep hole blasting operation of cutting method, almost all cut the pavement, cutting tunnel or pull the bottom of the free surface, along the mining room or section full width, graded or single row of one-way sequential blasting of. This practice, we intended to be used in this blasting operation of Yun-Yun cut, but due to cut section of the ore body, after several people indiscriminate digging, the original cut roadway