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Based on the domestic 3D mining software DIMINE, the geological exploration data of the 750~800 m level section of No. 1 vein group in the South ore section of Baiyinuoer Pb-Zn deposit are systematically collected and sorted. Through the establishment of a geological database? the three-dimensional model of ore and rock? the whole process of data analysis and processing and resource reserve estimation are systematically established, and the characteristics of the ore body and surrounding rock model, ordinary Kriging estimation method, and application characteristics are compared. The results show that five ore bodies are delineated. The model shows that the ore bodies are mainly located in the contact zone between diorite porphyrite and crystalline limestone which is a typical skarn deposit. The spatial distribution shape is saccular, large vein and lens, and the overall NE trend. According to the geostatistical theory, the theoretical variogram obtained by fitting is applied to the ordinary Kriging estimation. The total controlled and proved resources are estimated to be 186 600 tons and the Pb+Zn grade is 4. 04%. Compared with traditional methods, ordinary Kriging estimation errors are within a reasonable range, with good application effect and high estimation accuracy. It can provide a reference for mining design and provide an important theoretical basis for realizing mine digitization. [ABSTRACT FROM AUTHOR]

Mechanical properties of fiber‐reinforced plastic composites at room temperature can be enhanced by adding nanoparticles. However, the damage mechanisms of nanocomposites at low temperatures are still not understood. In this article, different contents of nano‐Al2O3 particles were added on fiber surface by solid–liquid separation method, and vacuum‐assisted resin injection was adopted to manufacture composites laminates. A comparative study on the mechanical behavior of nano‐Al2O3‐filled composite at room and low temperatures was presented. Effect of nano‐Al2O3 particle contents (0, 0.5, 1, and 2 wt%) on the mechanical properties of glass fiber‐reinforced vinyl ester resin (GF/vinyl ester) composite laminates at different temperatures was investigated. The damage mechanism of these composite laminates in various environments was studied. The results showed that to a certain extent, nanoparticles could improve the mechanical properties of composites at 25 and −60°C. With assistance of scanning electron microscope (SEM) observation, the damage mechanisms of the composite laminates in various temperature conditions were further analyzed. POLYM. COMPOS., 39:3006–3012, 2018. © 2017 Society of Plastics Engineers [ABSTRACT FROM AUTHOR]

The effect of nanosilica content (0, 0.5, and 2 wt%) on mechanical performance of carbon fabric woven cloth reinforced polymerized poly(butylene terephthalate) resin composites (CF/pCBT) is investigated. The catalyst and nanosilica particles are added on the prepreg surface, and hot-press processing is adopted in order to manufacture CF/pCBT composites. The experimental results reveal that nanosilica could enhance the mechanical performance of CF/pCBT composites. After adding nanosilica in the composites, elastic modulus enhances 23.96%, and Mode-II fracture toughness increases 380.43%. Scanning electron microscope observation shows that dispersity of nanoparticles in composites plays an important role on the overall mechanical performance of the obtained composites. Furthermore, failure mechanism has been analyzed according to the damage morphology. POLYM. COMPOS., 38:2528-2535, 2017. © 2015 Society of Plastics Engineers [ABSTRACT FROM AUTHOR]