Studies on Burning Process of Clinker Used for Corrosion-Resisting Cementitious Material in Fill Mining

Abstract

Cemented filling body exposed to acid mine water or high salinity mine water will be subjected to various kinds of physical and chemical attack. In this paper, the burning process of a modified special cement clinker used for corrosion-resisting cementitious material in fill mining is studied by means of TG-DTA, XRD, and chemical method. The main minerals of this kind of clinker are C3S, C2S, C4A3, and C4AF. The optimal firing temperature range of the clinker is from 1300°C to 1380°C, and a suitable amount of F- and SO3 in raw meals is helpful to the coexistence of C3S and C4A3in the clinker.

The mitigation of surface subsidence in coal mines

“…The study on it mainly concentrates on the prediction of separation layer location, calculation of separation layer size, features of overburden failure, dynamic process of separation layer development, grouting technology, etc. [7][8][9][10][11][12] The effect of OSLG applying in mitigating surface subsidence is the objective evaluation for the feasibility of this method. Therefore, it is crucial to analyze grouting subsidence mitigation (GSM) effect, while this paper developed research on the GSM effects on OSLG.…”