Remote fluid-power technology for fully mechanized caving face with large mining height

PANG Yi-hui

doi:10.11799/ce201711005

Abstract：Aiming at the pressure loss and voltage drop in long distance power and fluid supply of fully mechanized coal face,according to the remote power and fluid supply for high power and heavy top-coal caving equipment in Longwanggou Coal Mine,simulation was carried out to analyze of the influence of pipeline parameters and flow on long distance pipeline pressure loss,the intelligent integration fluid supply system was studied,the impact of voltage drop loss on power distribution equipment was analyzed and the limit distance of reliable power supply was calculated,and then,the optimization design of remote power and fluid supply scheme was carried out for fully mechanized high-cutting top-coal caving face in Longwanggou Coal Mine.The results show that,the emulsion flow velocity is positively related to the fluid pressure loss,the 2450m pipeline of Longwanggou Coal Mine suffered about 3.54MPa fluid pressure loss,and constant-pressure rapid fluid supply was realized with the variable frequency intelligent integration system.Special cable and reactor should be applied for high voltage frequency converter long-distance power supply to reduce the interference of power grid,and the limit distance of reliable power supply distance for shearer and crusher was 1550m.The remote power and fluid supply technology solved the technical problems in fully mechanized high-cutting top-coal caving face roadway of Longwanggou Coal Mine,such as,limited space for workers to ambulate,great ventilation resistance,large number of equipment and trains,and high labor intensity for support moving,etc.