金刚石钻进中,遇到漏失层常采用水泥浆水泵灌注方法,其效果虽好,但工艺较复杂. 1985～1986年,我队施工的金窝子矿区,在80m范围内有一层强烈蚀变带,大部分钻孔出现裂隙性全孔漏失,3台金刚石钻机昼夜消耗清水4t.我们采用井口倒入法灌注水泥浆,灌注钻孔27个,候凝时间4～48小时,漏失层深10～74.06m,成功率100%.具体做法是: 1.首先要测准水位.如井内水多,水泥浆易稀释,需用自制的球式逆止阀捞水后再行灌注. 2.捞水后如水位回升快,可将一袋水泥按0.3的水、灰比搅拌后投入井内,使水位升高,并从裂隙流走.如一袋不够,可再加一袋,以将孔内水挤干为准.然后按正常水、灰比灌注水泥浆. 3.计算水泥浆重,应按比钻进口径大二级考 Diamond drilling, often encountered in the lost layer of cement slurry pump perfusion method, the effect is good, but the process is more complex .1985 ~ 1986, I team construction Jinwozi mining area within 80m range of a strong alteration With most of the borehole fissure loss of the entire hole, 3 diamond rig day and night consumption of clean water 4t. We use wellhead pouring method of perfusion grouting, perfusion drilling 27, the waiting time of 4 to 48 hours, the depth of the lost layer 10 ~ 74.06m, the success rate of 100%. Specific practices are: 1. First of all to be calibrated water level, such as water wells, easy to dilute the slurry, need to use homemade ball check valve after reperfusion. If the water level rises rapidly after the water is poured, a bag of cement can be put into the well at a ratio of 0.3 water and ash after mixing, causing the water level to rise and flow away from the fissure. Squeeze dry prevail, and then press the normal water, cement than the perfusion of cement 3. Calculate the weight of cement slurry, drilling should be larger than the second grade test