The preparation of cementitious materials by replacing part the cement with activated coal gangue is great significance to industry in terms carbon reduction and coal-based solid waste utilization. For this paper, material was prepared firing under suspension conditions batching it limestone powder using Inner Mongolia as raw material. optimal ratio determined testing strength changes at 3, 7, ...

Coal mine waste rocks, mainly broken gangue, can be used as filling materials to backfill into goafs. Under the overburden load, body is vulnerable compressive deformation and particle breakage. With increase in mining depth, overlying strata will impose different loads on rock at loading velocities, which further affect material In this paper, an experimental scheme a device are designed study...

In mining areas where gangue is used for infill mining, Ordovician limestone karst water affected by discarded gangue, and the quality changes significantly. this study, effects of on change under different immersion solution conditions were evaluated Zhai Zhen Coal Mine, Hongqi Mine Limestone Karst Water, Baizhuang Mine. The results showed that cations in each group solutions had similar trend...

In order to solve the problem of high cost coal-based solid waste bulk stacking and paste filling in large-scale coal electrification base East NingXia, this study, fly ash is skillfully used replace broken gangue as mixed material. As using a jaw crusher for crushing large expensive, its energy consumption relatively high, filler aggregate studied through micro macro test analyses. Using respo...