Abstract In order to study the effect of basalt fiber content, length and coal gangue activation on compressive strength splitting tensile concrete, 24 groups orthogonal experiments were designed. The results show that influence various factors concrete is > content length. conducive increase strength; increases first then decreases; beneficial unfavorable best ratio engineering practice 0.1...

The filling mining method is important in realizing the green of mineral resources. Aiming at problems land resource occupation, environmental pollution, and rational utilization coal-based solid wastes such as coal gangue, fly ash, desulfurization gypsum, a new paste material was developed with gypsum raw materials. microstructure materials analyzed by XRD SEM. Combined Box-Behnken experimenta...

Fully mechanized caving is the most popular method for safe and efficient coal mining in China. In this study, based on geological conditions of Workface 822 Yuandian No. 1 Mine, we used theoretical analysis numerical simulation to analyze crushing mechanism gangue-containing seam roofs, discuss mechanical model stability seams simulate different methods intervals, optimize parameters from seam...

Coal gangue is widely used as a filling material in coal seam mining. During the steeply dipping seam, loading rate, gradation, and speed have an important impact on deformation failure of gangue, further affect bearing overlying strata control surrounding rock movement deformation. Therefore, this article uses self-made steel cylinder to conduct compression test HCT pressure testing machine. T...

Coal gangue, an industrial waste, is rich in silicon and aluminum phase may be used as a mineral admixture concrete after moderately stimulating activity, allowing for efficient solid waste utilization. This study mortar strength activity evaluation method to investigate single or compound activation methods find the optimum of coal gangue. FLIR, XRD, SEM were mechanism different modes, providi...

Many of the veins enclosed within the Paleozoic basement of the Catalonian Coastal Ranges show severa1 common characteristics: low temperature of formation (between 75 and 200°C), the presence of complex polisaline fluids and a certain relationship to the pretriassic paleosurface. Mineralogical composition and age are variable, ranging from Pb-Zn veins with carbonate gangue of late Hercynian ag...

Coal gangue, a by-product produced during the coal processing, has serious impact on environment. Using gangue as fertilizer been proven helpful in potentially reducing its environmental and improving value. In this study, formation mechanism influencing factors of coal-gangue-based silicon was studied using XRD FT-IR measurement technologies. The results showed that layered structure severely ...