The theory of moving coal off loading technique is studied, the fundamental principle and technical parameter including coal off loading capacity, the shortest time of control circulation, movable door stress, power of complete equipment and so on was analysed, and the equipment used to improve anthracite lump coal yield is developed.

This paper introduces the cause,process and benefit of technical system reform for coal-washing,coal-storing,coal-returning at Gushuyuan Mine coal preparation plant of Jin Mei Group.