论文部分内容阅读
一九七四年,我队在陕南某矿区承担化学矿地质勘探任务,由于该矿区断裂构造较发育,岩层破碎,节理丛生,在钻探过程中经常发生塌孔、掉块、冲洗液严重漏失、地下水回升等现象,给施工带来许多困难。以二号钻机所施工的ZK3号钻孔为例,开孔至15.3米,即发生漏失,随后边干边漏,最严重时全孔无水位,进尺半米,即要消耗15米~345秒的堵漏泥浆,同时加用锯末、泥球、麻刀、粘片、石灰乳、水泥等材料堵漏,均无效果。据统计,此孔因处理漏失停工就达316.25小时,相当
In 1974, our team undertook the task of geological prospecting of chemical minerals in a mining area in southern Shaanxi. Due to the relatively developed fault structure in the mine area, fractured rock formations and the occurrence of clusters of joints, frequent collapse holes, , Groundwater rise and other phenomena, to the construction of many difficulties. For example, ZK3 drill hole constructed by No.2 drilling machine is 15.3 meters in diameter, which means that there is a leakage. Then, the side hole is drained. In the worst case, there is no water hole in the entire hole. Of plugging mud, while adding sawdust, mud ball, knife, sticky sheet, lime milk, cement and other materials plugging, no effect. According to statistics, this hole due to handling downtime reached 316.25 hours, quite