A novel speed sensor-less direct torque control induction motor drive system for the mining locomotive haulage is presented in the paper. Rotor speed identifica
Coal mining under buildings certainly causes surface movement and deformation, therefore, it brings about deformation even fracture for buildings. It is an impo
Based on field measurement, the relations was introduced between mining depth and the peak value places of abutment pressures in long wall face of the deep coll
Based on engineering reliability of large complex system and distinct characteristic of soft system,some new conception and theory on the medium elements and th
Based on the new viewpoint of solid and gas interaction mechanics,gas leakage in a duble deformable coal seam can be understood.That is ,under the action of geo