论文部分内容阅读
相邻矿脉意义及目前开采中存在的间题在矿脉群的矿床中,根据矿脉的分布和埋藏条件来看,常常有这样一些急倾斜板薄矿脉之间距离为2～4公尺;矿脉在水
The meaning of the adjacent veins and the existing problems in the mining In the mineral deposits of the veins, according to the distribution and burial conditions of the veins, there are often such steep sloped plate thin veins distance of 2 to 4 meters; veins in water