摘要
某矿区ZK552钻孔中的"倒裂隙"造成漏失。"倒裂隙"的显著特点是与坡积含水层不相通,漏失层位置与实际静水位不一致,裂隙的倾向与地形坡向基本一致,是导水裂隙且通向地表,有较好的排泄点(泉)。治理这种裂隙的方法是准确计算漏失位置,采用水∶灰为0 4的水泥浆灌注,同时用替浆水尽可能把水泥浆压入"倒裂隙"中,维持一段时间泵压,防止裂隙水把水泥浆压回钻孔。灌注后的凝固时间需40h以上,有效阻塞过水通道,钻孔的严重漏失可得到彻底封堵。
The inverted fissure in ZK552 borehole on a mining area has made leakage. The inverted fissure is characterd by the obstructed to the slope aquifer, the leaking place is not consistent with the real standing water level. The fissure dip direction almost fit the topography slope aspect, and it is a water-conducted fissure leading to the surface and with nice draining place. To control this kind of fissures is to precisely calculate the leaking place, pour the grout by 1∶0.4 rate of water and ashes, at the same time press the grout into the inverted fissure by using the substitution mud water as far as possible and maintain pressing the pump for a few times to prevent the grout from being pushed back to the borehole by fissure water. It should take 40 h or more for the solidifying to block the water passageway efficiently and stop the serious leaking from borehole completely .
出处
《黄金地质》
2003年第4期69-71,共3页
Gold Geology
关键词
钻孔堵漏
跟管钻进
水泥浆灌注
漏失
prevent leaking from drilling
drill following pipe
grout pouring
