Study Of The Integral Monitoring And Control System For Slope-Mine Safety

The thesis aims at car-running accident in the transportation of slope mine. It realizes integrated monitor on slope mine transportation using PLC technology, automation technology, and NDE (nondestructive testing) technology, avoids effectually car-running that does a lot of damage.The control core is SIEMENS S7-200PLC, and detecting man infrared testing, detecting steel-wire broken sensor, detecting steel-rope tension sensor, detecting pit car speed sensor and detecting backstop position sensor. Normally closed anti-car-running instrument is used net-block and stick-block, it is driven by 380V approved electric motor. This system realizes six main functions: dynamic detecting on steel-rope, interlock and alarm when man and tramcars go along, self-lock and alarm when tramcars break the rail, self-lock and alarm of car-running, self-lock and alarm of overspeed, raising the net-block when tramcars coming. It avoids serious mine accident because of car-running, steel-rope broken, and overspeed in slope mine transportation.The thesis offers the material scheme of system, the hardware project based on PLC, and the key software program, using communication of single-chip and PLC, the system realizes display and alarming of monitoring data. Secondly, The thesis designs the main sensor that detects the pulling force of steel-rope. Thirdly, the system detects destructive steel-rope by Magnetic Testing method, and offers the structural design of magnetizing exciter and the correlative calculation parameter.The system realizes integrated monitor and control on slope-mine transportation, and obtains multifunctional and multi-ensure performance, and offers advanced and reliable instrument for slope-mine transportation. At present, this system has been applied at XinTai city XinTai coalmine and ShenCun coalmine successfully, the operation is reliable, and the secure effect is preferable.