论文部分内容阅读
一、矿床地质条件分层留矿法的新方案曾先后在五个采场中试用。这些采场的地质矿床条件大致相同。矿脉厚度为0.2-0.2米,分支、复合、尖灭及侧现的现象非常普遍,矿石有脆性,爆破后易成粉矿。矿石硬度系数f=10-12。矿脉倾角为80-85°但有时局部变缓(60°左右)。围岩为硅化石灰岩,稳固性较大,节理及裂缝比较发达,但极少产生脱帮。围岩的硬度系数f=T2-15。由于矿床含有大量硫化物,夹石中又有石膏及方解石等被水溶解后变成粘性的物质,因此,采下矿石
First, the geological conditions of stratified deposit method of the new program has been in the five stope trial. The geological conditions of these stopes are roughly the same. The thickness of the veins is 0.2-0.2 m. The phenomenon of branches, complex, pinch out and side is very common. The ore is brittle, and easily becomes powder ore after blasting. Ore hardness coefficient f = 10-12. The veins dip at 80-85 °, but sometimes locally slows down (around 60 °). Surrounding rock is silicified limestone, which is more stable, more developed in joints and cracks, but has few stripping help. Rock hardness coefficient f = T2-15. As the deposit contains a large amount of sulfide, gypsum and calcite in the stone after being dissolved into water becomes sticky material, therefore, mining ore