Research On Key Technology And Equipments For Advanced Support Used In The Ends Of Fully Mechanized Mine Face

Most ends support and advanced support applied currently, with such shortage aslarge suspending roof area, small supporting area and hard adaptability to the changeof road width, have limited production in safety and efficiency.This dissertation studies a new type of ends and advanced support equipmentusing virtue protype technology, with application background of Ji-er coal mine23-07mining face, which is comprised of five single support with top beams mesh eachother through tooth-like edge, so it has the whole protecting length of12m, width of3.5m and height of3.7m. The top beam also have right angle sprag units adjustable inboth sides to support wall.The result of kinematic simulation of the equipment by Pro/E prove thereasonability of this design. In addition, finited element analys is applied on theequipment strength by ANSYS, under seven conditions of top beam. The results showthat strength of both the whole equipment and key components meets the requir ofdesign with reasonable safe coefficence. Also, it developes a set of hydraulic systemwhich together with the four-bar linkage, could control avoid repeated supporting tolead to roof beakage.The results of industrial shows that, this new-type equipment, has better effecton roof and wall supporting than the traditional supporting method of single hydraulicprop, leading mining face move more fastly, and the support equipments are of lessmaintenance strength and of more safety.