The mined-out area of a gypsum mine is right un-demeath civil constructions of a township, threatening the safety ofthe latter. To evaluate the long-term stabil
To meet some special requirements such as paper filler,ceramic titanium white and synthetic 4A zeolite, the raising whiteness of calcined kaolin has become more
The automatic crystallization of MgO duringthe sintering of Si<sub>3</sub>N<sub>4</sub>-MgO-CeO<sub>2</sub> is first discovered.ForSi<sub>3</sub>N<sub>4</sub>-M
This paper analyzes the basic characters ofoptimum open-pit limit.According to them,following gener-al rule for designing pit limit is obtained.The incrementals