它不受井壁和用围岩层的影响，可准确地划分出咸淡水分界面。
It is not affected by the well-wall and surrounding strata and may differentiate accurately between seawater and fresh water.
监测显示了工作面周围岩层的三维破裂形态和范围，为矿井确定防水煤柱的高度提供了可靠的依据；
MS monitoring results also show the 3_D shape and scale of strata fracturing, which are very useful to determine the height of waterproof in coal mine.
最后详尽地阐述了在不同岩层倾角状况下，围岩压力与衬砌结构内力分布特征，即围岩压力与衬砌结构受力随岩层倾角的增大而增大。
Following the enlargement of the dip angle of the rock structure of the pressure of the surrounding rock and the internal force of the lining structure increase all the time.
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