Then simulates to eluviate the mixtures of adsorption fly ash and gangue and gains the best proportion of the two kinds of castoff when they fill up mine subsidence area;
并对吸附灰和煤矸石的混合物进行淋溶模拟试验，得出吸附粉煤灰和煤矸石充填采煤塌陷区的最佳灰石比；
Through simulation acid rain marinate and eluviate experiment, make clear the toxicity and the harm to environment of chromium slag.