摘要
通过对长凝铁矿进行详查,针对钻探施工中遇到的第四系土厚度达到500 m,以及孔内情况较为复杂等困难,选择了合理的钻进工艺以及相应的冲洗液护壁,保持了孔壁稳定,孔内安全,大大减少了孔内事故,降低了施工成本,保证了工程质量,取得了良好的效果。
Through detail investigation on Changning iron mine,aiming at the situation of fourth series soil depth reached 500 m in boring construction,and down hole situation was complex,the proper boring process and corresponding flush fluid slope shoring was selected,which kept hole wall stability,down hole safety,reduced out hole accident largely,reduced construction cost,guaranteed engineering quality and obtained better effect.
出处
《山西建筑》
2010年第18期84-85,共2页
Shanxi Architecture
关键词
超厚度
第四系土
钻探工艺
super depth
fourth series soil
boring process
