Roof separation instrument structure 

 1, the roof separation instrument hole anchor claws, measurement wire hole fixed claw and measured four parts of the reading device consists of: 

 Two hole anchor claw spring grasping claw structure; 

 Measuring wire made of soft elastic small multi-strand fine wire connection holder and measured reading device; 

 4, the measured reading device with a tick mark consists of two plastic horizontal tubes; 

 5, the reading scale, and plastic pipe and tube spring. 
 The principle of the roof separation instrument 
 LBY-roof separation indicator is a special instrument for the monitoring of roof strata separation arising from the displacement. It is mainly applied by bolt, Cable support the tunnel roof and the need to measure the roof displacement of the face. The sensitivity of the instrument, intuitive display, greatly reducing the visual error. Coal mine engineering and technical personnel and testing staff to determine the length of the bolt, tensile strength, and understand the use of the anchor, anchor cable of the rational, economic and scientific basis. 
 2, the roof separation indicator will reflect multiple fixtures of the roof hole with the rock change value by measuring the rope to the roof surface, the measured reading device. 
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