Technical Transformation And Application Of On-line Monitoring System In Mine Main Ventilator

The mine main ventilator undertakes the task of mine ventilation.As mine constant extension and the changes of the mining face layout,the required air volume also changes.If air volume and velocity are excessive,high or too few,breeze will bring hidden dangers to safety production,and even cause accidents in the mining face and system roadway.Therefore,adjustment of mine air volume must be adjusted according to driving changes,and must comply with the relevant provisions of the"Safety Regulations for Coal Mines".The main ventilator with speed regulation function is the best means to solve adjustment of mine air volume.At the same time,matching the on-line monitoring system of ventilator will significantly improve the operation,maintenance and management level of ventilator,and can effectively reduce the ventilator failure shutdown rate,in a real sense to achieve preventive maintenance.In this study,we deeply analyses the ventilation system of the east mining area and the present situation of the main ventilator electric control system of the east ventilation shaft in Dashuitou Coal Mine.Aiming at the problems existing in ventilation system in east mining area of underground mine,such as insufficient air volume,low wind speed,high temperature and gas exceeding the limit of each working face.As well as the problems existing in the main ventilator of east ventilation shaft,such as insufficient air supply,backward electronic control system,high impulse current of low-voltage direct start,unable to adjust speed,etc.We analyzed the application and principle of high-voltage frequency conversion speed regulation system in mine ventilator,put forward the transformation scheme of frequency conversion speed regulation of main ventilator in the east ventilation shaft,and completed the upgrading and transformation of ventilator and electronic control system.At the same time,the ventilator on-line monitoring system was designed and implemented for the reformed ventilator and its electronic control system,which realizes on-line monitoring of the operation status of the ventilator so that we can master the operating status of the ventilator and its electronic control system in real time.The new technologies and methods adopted in the above contents are the necessary technical guarantee for mine ventilation safety.Through the above brief description and implementation work,we can effectively solved security risks in ventilation system of the east mining area and the ventilator electric control system of the east ventilation shaft in Dashuitou Coal Mine.These works provide a reliable guarantee for the safe and stable operation of mine ventilation system.