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一、地质特征萨尔托海岩体位于达拉布特超基性岩带的东段。处于西准噶尔界山褶皱带的次一级构造——扎依尔复向斜的南翼近轴部。岩体较严格地受达拉布特断裂的萨尔托海分枝断裂的控制。今年钻探工作量布置在廿四群西部一带和三号区,靠近超基性岩体边缘,岩层走向和倾角变化很大,岩层倾角50°～60°,岩性受构造和蚀变作用,物理性质差异悬殊、节理、片理发育,是孔壁不稳定的潜在因素。超基性岩受强烈的蛇纹石化,部份受绿泥石化,水敏性强,遇水后极易水化膨胀、坍塌掉块。占岩体90%的斜辉辉橄岩,以及纯橄揽岩中氧化镁含量达38%左右,并且地下水矿化度较高,Mg~(++)含量少则几十毫克,多则
First, the geological features Salto Sea rock body is located in the eastern section of the Dalbott ultrabasic rock belt. The subfamily structure of the Jieshan fold belt in western Junggar - the southern wing of the Zayir synclinorium. The rock mass is more tightly controlled by the Salto Sea break in the Dalbott fault. This year, the drilling workload is arranged in the 24th group of western area and No. 3 area near the margin of ultramafic rocks. The strike and inclination of the rock layers vary widely. The rock dip angle is between 50 ° and 60 °. The lithology is controlled by tectonics and alteration. The physical The nature of the disparity, joint, film development, is a potential factor of pore wall instability. Ultrabasic rocks are strongly serpentinized and are partly chloritized. They are highly water-sensitive and easily hydrate and swell after falling into water. Accounting for 90% of the gneisses in the rock mass, as well as about 38% of magnesia in the pure olivine, with a high salinity of groundwater and a few tens of milligrams of Mg ~ (++)