Design on Control System of Top Drive Drilling Rig for Freezing and Grouting Boreholes

According to the low dilling efficiency, low automation level, poor accident handling capacity and other problems existed in the rotary table driling machi ne for mine freezing and grouting application, a control system of the top drive drilling machine for the mine freezing and grouting with a human and interface technolog y was designed based on the programming controller PLC.The paper in detail introduced the certain implementation processes and working principles of the stepless sp eed regulating of the control system, the automatic screw-on-off, automatic rod feeding, monitoring and control alarm and accident handling functions.Meanwhile the pa per introduced the structure principle of the drilling platform- -the key equipment in the control system.The system measured results showed that the control system cou Id highly reduce the drilling time, highly improve the drilling efficiency and the accident handling capacity.