论文部分内容阅读
当鑽进中如遇到地下含水层、透水层或岩层中有裂縫、空洞、断层时,就会发生孔內出水或漏水現象。这是因为当鑽孔由不透水层鑽通到透水岩层,如透水岩层中含水且水位高于孔口标高时,由于水平性的关系,促使地下水由孔口向外喷流,以致发生孔內出水現象。反之,如透水岩层中不含水或水位低于孔口标高时,由于水头压力差的緣故(如图1),促使注入孔內的液体漏进地层中去,从而发生孔內漏水現象。
When drilling in the case of underground aquifers, aquifers or rock cracks, voids, faults, there will be holes within the water or water leakage. This is because when the borehole is drilled from the impermeable layer to the permeable rock formation such as when the water in the permeable rock formation is above the level of the orifice due to the horizontal relationship, the groundwater is caused to flow outwardly through the orifice so that the hole occurs Water phenomenon. On the other hand, if there is no water in the aquifer or the water level is lower than the height of the orifice, the liquid in the injection hole will leak into the formation due to the difference of head pressure (see Figure 1), resulting in water leakage in the hole.