Deep mining has started in the Huaibei area, and serious threat of high confined water on floor to coal seam is gradually increasing. Based deep project at working face II633 Hengyuan mine, this paper theoretically analyzes damage depth risk inrush from floor. The best proportion grouting materials was quantitatively optimized by indoor experiments, an industrial field test conducted judge effe...

The mammalian nervous system is extremely complex, consisting of many thousands of distinct neuronal cell types, any one of which may require multiple cell interactions to generate a functional circuit. The elaboration of this circuitry is dependent in no small part on the logic of the developmental program that ensures that appropriate cell types are generated at specific positions in the brai...

We present an overview of the relation between mantle dynamics and plate tectonics, adopting the perspective that the plates are the surface manifestation, i.e., the top thermal boundary layer, of mantle convection. We review how simple convection pertains to plate formation, regarding the aspect ratio of convection cells; the forces that drive convection; and how internal heating and temperatu...