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1. 发明授权

US4931638A Method of monitoring hidden coal-rock interface and transducer realizing this method 失效
标题翻译：监测隐藏煤岩界面和传感器实现该方法的方法
公开(公告)号：US4931638A
公开(公告)日：1990-06-05
申请号：US265807
申请日：1988-07-25
申请人： Zinovy A. Chernyak , Alexandr A. Tsvetkov , Alexandr M. Onischenko , Anatoly I. Kandala , Valery G. Khrapov , Georgy M. Nunuparov , Vladimir M. Slavinsky , Isaak L. Geikhman , Nikolai P. Omelchenko , Boris A. Rafalovich , Viktor I. Silaev , Konstantin F. Zhdanov
发明人： Zinovy A. Chernyak , Alexandr A. Tsvetkov , Alexandr M. Onischenko , Anatoly I. Kandala , Valery G. Khrapov , Georgy M. Nunuparov , Vladimir M. Slavinsky , Isaak L. Geikhman , Nikolai P. Omelchenko , Boris A. Rafalovich , Viktor I. Silaev , Konstantin F. Zhdanov
IPC分类号： E21C35/04 , E21C35/24 , G01V5/00
CPC分类号： E21C35/24
摘要： A method for monitoring a hidden coal-rock interface, comprising the steps of irradiating the medium (M) being monitored from a gamma-ray source (1) and registering by a detector (2) the intensity of backward scattered radiation at a distance (A) from the surface of the medium (M) and at a distance (B) from the radiation source (B). Two zones (Z.sub.1 and Z.sub.2) are formed at the detector (2) for reception of backward scattered radiation, differently spaced from the source (1), so that the intensity of backward scattered radiation received by the zone (Z.sub.1) closer to the source (1) diminished with the distance (A) from the detector (2) to the medium (M), and grows when received by the zone (Z.sub.2) far from the source (1). The intensities of backward scattered radiation of both zones (Z.sub.1 and Z.sub.2) are summed up to obtain total intensity invariant with respect to variations of the distance (A) between the detector (2) and the medium (M). A transducer realizing the above method comprises a housing accomodating the gamma-ray source (1) and backward scattered radiation detector (2) shielded by a screen (3) provided with ports at different distances from the source (1). The area of the port farther from the source (1) is greater than that of the nearer port; the distance (B) from the gamma-ray source (1) to the detector (2) does not exceed a preset maximum distance (A.sub.2) from the detector (2) to the medium (M) being monitored.
摘要翻译： PCT No.PCT / SU86 / 00121 Sec。 371日期：1988年7月25日 102（e）日期1988年7月25日PCT提交1986年12月25日PCT公布。出版物WO88 / 05116 日期：1988年7月14日。一种用于监测隐藏的煤 - 岩界面的方法，包括以下步骤：从γ射线源（1）照射被监测的介质（M）并由检测器（2）距离介质（M）的表面距离（A）与辐射源（B）的距离（B）处的后向散射辐射。在检测器（2）处形成两个区（Z1和Z2），用于接收与源（1）不同间隔的反向散射辐射，使得由区（Z1）更接近源的接收的反向散射辐射的强度（1）从检测器（2）到介质（M）的距离（A）减小，并且当远离源（1）的区域（Z2）接收时，其增长。将两个区域（Z1和Z2）的向后散射辐射的强度相加，以获得关于检测器（2）和介质（M）之间的距离（A）的变化的不变量的总强度。实现上述方法的传感器包括：容纳伽马射线源（1）的外壳和由设置有与源（1）不同距离的端口的屏幕（3）屏蔽的向后散射辐射检测器。距离源（1）更远的端口的区域大于较近端口的区域; 从伽马射线源（1）到检测器（2）的距离（B）不超过从被检测器（2）到介质（M）的预设最大距离（A2）。

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