According to the movement and change rules of mechanical structure of surround-ing rock-coal mass system during coal excavation, the mechanism of sudden instabi
Coals are carbon-rich materials with excellent aromatic nature and macromolecular structure. They pose great potential as the source of organic chemical feedsto
<正> The feasibility of the nozzle of self-excited oscillation pulsed jet (SEOPJ) as the breaker and loosing device for the air-lift pump was researched.The dyn
Synthesizing the mechanical models of the belt, the driver and the take-up device, the dynamics model was established on the longitudinal vibration of the overa
Based on testing the trace elements of the four main aquifers of underground water in Huaibei Coalfield by using the ICP-MS in the University of Science and Tec