论文部分内容阅读
分析克里沃罗格矿区和阿尔泰山区矿山使用阶段崩落法的经验后得出,开切割槽和崩矿是这种采矿法最费劳力的工序。开切割槽需要掘进切割天井和凿岩巷道,而且钻凿炮孔的工作面很狭窄,凿岩爆破参数小。形成的切割槽质量差,经常导致爆破崩矿不完全,因此矿石回收指标低。采用向垂直切割槽崩矿的分段崩落法时,这种现象会大大增加矿石损失。此外,许多矿山的经验证明,在地压大的条件下,靠近补偿空间的矿体不稳固,特别是有裂缝、岩性非均质或者有地质构造破坏时更不稳固,引起切割槽两壁的上部开
Analyzing the experience of the caving method at the Krivoluca and Altai mines, it has been concluded that cutting slots and collapsing are the most laborious processes of this mining method. Cutting the ditches need to cut the cutting pavements and rock tunnels, and the face of the drilled hole is very narrow and the parameters of the rock drilling are small. The resulting poor quality of the cutting flutes often results in incomplete blasting and disintegration, so ore recovery indicators are low. This phenomenon can greatly increase the ore loss when using the subsided caving method that collapses to the vertical cutting flume. In addition, the experience of many mines shows that under the conditions of large pressure, the orebodies close to the compensation space are unstable, especially with cracks, lithology heterogeneity or more unstable when the geological structure is damaged, causing the two walls of the cutting groove The upper part of the open