无天井用炮孔直接切割拉槽

• 作 者: 赵维义
• 机 构: 昆明冶金设计院,
• 出 处: 金属矿山
• 发表日期: 1978年06期
• 关键词: 炮孔 拉槽 切割槽 凿岩巷道 切割效果 切割天井 补偿空间 采矿方法 掏槽孔 天井

切割工作是采矿方法的重要工艺之一。切割工程通常由切割天井(简称切井)、切割巷道(切巷)、凿岩巷道(凿巷)和切割槽组成。切割槽是为回采爆破提供自由面和补偿空间的关键工程,它的质量好坏对切割效果和回采工作始终有重大影响。在分段崩落采矿方法中,由于切割工程量较大(有底柱分段崩落法一般占采切比的30～60%,无底柱分段崩落法一般占采切比的15～20%),消耗的劳动量较多(有底柱分段崩落法

Cutting is one of the important processes for mining methods. Cutting usually consists of cutting the well (cutting well), cutting the roadway (cutting lane), drilling the roadway (cutting the roadway) and cutting the groove. The cutting groove is a key project for providing free surface and compensation space for blasting in production. The quality of the cutting groove has always had a significant impact on the cutting effect and the recovery work. In the sub-caving mining method, because of the large amount of cutting work (the bottom caving caving method generally accounts for 30-60% of the cut-off ratio, the bottomless caving method generally accounts for 15-20% of the cut- ), The amount of labor consumed (with column caving method