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进行水文地质学及工程地质学研究时,确定地下水运动方向是个重要的任务。与一段采用的电学的、热力的及机械的方法相比,斯维尔德洛夫斯克矿业学院研究出的一种新的测定水流方向的装置具有一系列优越性。它的测定原理示意于下图。该装置由与铅屏蔽体相联结的流向仪及涂有放射性同位素的磁针组成。在屏蔽体中开有宽度逐渐增大的槽孔,而磁针被置于非磁性密封室中。流向仪及磁针的旋转轴相重合。为了防护放射源的散射射线,核辐射探测器包以圆柱状屏蔽体。这样,辐射计就仅记录穿过屏蔽体环状槽孔的直射射线。利用三
When studying hydrogeology and engineering geology, determining the direction of groundwater movement is an important task. In comparison with the electrical, thermal and mechanical methods used for a period of time, a new device for determining the direction of water flow developed by the Sverdlovsk Institute of Mines offers a number of advantages. Its measurement principle is shown in the following figure. The device consists of a flowmeter connected to a lead shield and a magnetic needle coated with a radioactive isotope. The shielding body has a slot with a gradually increasing width, and the magnetic pin is placed in a non-magnetic sealing chamber. The flow direction and the needle axis coincide. In order to protect the radioactive source of scattered radiation, nuclear radiation detector package cylindrical shield. In this way, the radiometer records only the direct rays passing through the annular slot of the shield. Use three