论文部分内容阅读
分佈最廣的鎳、金、錫、鎢、钼鑛床,以成組的急傾斜、間亦以綏傾斜薄的和不厚的鑛胍賦存着。不固定的鍍脈的基本埋藏要素和變化的鑛石中的金屬含量,是有色金屬鑛床的特微。被開採鈹脈較厚部分的鑛石中,經常具有較低的金屬含量,而在較薄的部分中金屬含量較高。 現在有不少金屬鑛山已轉入開採鑛床的深部。当達400—500公尺和更深時,由於提昇高度和湧水量的加大,以及在通風時坑內的溫度,負压和阻力的增加,致使脈状鑛床開採條件顯著地複雜化。提高了回採中段的回採工作的運搬支柱木材和充填材料的運輸費用。由於該鑛床鑛石形
The most widely distributed nickel, gold, tin, tungsten and molybdenum deposits are grouped in steeply dipping units and are also hosted by paramagnetic slats of shallow and low thickness. Unsteady plated veins of the basic elements of the buried and changing the metal content of ore, non-ferrous metal deposits is a subtle. Of the ores that are mined in the thicker part of the beryllium pulse, they often have lower metal content, while the metal content is higher in the thinner part. Many metal mines have now been transferred to the depths of the mining deposits. At 400-500 meters and beyond, the extraction conditions of the vein-like deposits are significantly complicated by the increase of lift height and water gushing, as well as the increase of temperature, negative pressure and resistance in pits during ventilation. Increased transport costs for transporting pillars of wood and filling materials for the recovery work in the middle of the recovery. Due to the ore-shaped ore