摘要
C4Z-G-05孔为某铁路高黎贡山隧道工程勘察钻孔,钻孔深度1 075.5m。钻探过程中分别在孔深288～400m和611～724m穿过落差大于100m的断裂构造破碎带,并出现涌水及漏水现象,施工难度大,水文地质试验难以进行。据此,采取了合理的施工顺序,并根据钻进时的机械设备及钻进情况及时调控钻进参数;针对不同的地层,选用不同的泥浆类型,从而顺利的完成了该孔钻探工作。在水文地质试验中,对松散层潜水,采取了抽水试验,对两个断裂带,适时的运用观测涌水量和压力水头及涌水试验的方法,并选择适宜的计算公式,较好的完成了该孔的水文地质参数的计算工作,取得了良好的效果。
The borehole C4Z-G-05 is an engineering geological exploration borehole for the Gaoligong tunnel of a railway, with 1075.5m depth of bore. During the drilling, had intersected two shattered fault zones with throw larger than 100m, at depths 288- 400m and 611-724m, and so appeared water inrush and circulation loss, but hydrogeological tests were difficult to carry out. Thus, rational operation sequence adopted, according to mechanical equipment and drilling status, regulated and controlled drilling parameters in due course. In allusion to different strata, using different drilling mud, as so, fulfilled the drilling smoothly. In hydrogeological tests, for loose bed phreatic water, using pumping test to study the two shattered fault zones, timing observation of water inflow, hydraulic head and inrush test, choosing feasible computational formula, preferably accomplished the borehole＇s hydrogeological parameter computation and obtained good effects.
出处
《中国煤炭地质》
2012年第1期32-34,44,共4页
Coal Geology of China
关键词
超深钻孔
涌水
断裂带
钻探工程
水文地质试验
ultra deep borehole
water inrush
faulted zone
drilling engineering
hydrogeological test
