Showing papers in "Procedia Earth and Planetary Science in 2009"

TL;DR: Five future scenarios are examined: a world in which it is possible to know where everything is at all times, a world of positioning, representation, and wayfinding that is fully three dimensional; a world that involves the citizen as both consumer and producer of geographic information; a World of ready access to predictions of future landscapes; and a worldof real-time dynamic information.

TL;DR: In this paper, the effect of temperature on mechanical characteristics and behaviours of granite was analyzed by using experiments as scanning electron microscope (SEM), X-ray diffraction and acoustic emission(AE) and the micromechanism of brittle-plastic transition of granite under high temperature was discussed.

TL;DR: In this paper, the co-pyrolosis behavior is not a simple summation calculation, but has obviouse synergistic effects, and Rice straw significantly affects the release of volatile matter in co pyrolysis.

TL;DR: In this paper, a series of corresponding countermeasures should be taken effectively to remove these barriers for promoting ESCOs to improve energy efficiency by energy performance contracting (EPC) in China in favor of Chinese economy kept going sustainably.

TL;DR: In this article, the authors discuss some of the operational difficulties, and some evolving design principles that must be considered when planning a thickened tailings deposit, and highlight some of their recent advances, and describe the mining operations around the world, which are now in excess of twenty where the technology is being used.

TL;DR: In this paper, the authors used the Oxidation Kinetics which reflects the entire dynamic process is put forward, through testing the concentration of oxygen in the outlet of sample vessel at 70 °C and CPT later.

TL;DR: In this article, the magnetic properties and global operating parameters of nanocrystalline and ferrite materials are compared and it is figured out that because of their marvelous magnetic properties the nanocrystine materials are the future magnetic materials in power electronics.

TL;DR: Practical engineering applications in Sanhejian Coal Mines indicate that the proposed fuzzy neural network risk prediction model for rock burst trained with the improved BP algorithm is not only precise and simple, but also intelligent, with the predicted results well agreeing with the practical conditions.

TL;DR: In this article, a new large vibrating screen with hyperstatic net-beam structure was presented and the structural size of stiffeners on the side plate was optimized under multiple frequencies constraints and an adaptive optimization criterion was given.

TL;DR: Based on the law of overburden movement and surface subsidence, an integrated controlling technique, including the key techniques of aquifer protection mining, mine water filtration and purification through goaf, fire prevention and extinguishment in shallow seam, non-rockroadway layout with underground waste disposal, pre-mining eco-function circle construction and post-mining ecological recycling system building, has been developed by methodologies of theoretical analysis, laboratory simulation, numerical calculation, industrial practice, etc as discussed by the authors.

TL;DR: In this article, the thiobacillus ferrooxidans cultivation conditions with minimal jarosite in 9K medium by varying the initial pH, the initial Fe2+ concentration and the applied potential were studied and determined.

TL;DR: In this article, the results of tracking geological research on developing coal-bed methane show that 1) geological structure, tectonic stress field, and coal reservoir pressure control regional changes in productivity; 2) high productivity wells in research area distribute in the secondary anticline core synclinorium while low productivity wells mainly distribute in secondary anticlines core of anticlinorium or normal fault zone.

TL;DR: In this article, a high-preensioned and intensive bolting and cable system was developed to control the dilatant deformation and maintain the integrity of surrounding rock, and the mechanical properties of the bolting components were improved.

TL;DR: In this paper, the current state-of-the-art of coal dewatering is summarized and discussed, and some of the upcoming novel de-watering technologies are discussed.

TL;DR: In this article, an integrated approach combining goaf gas monitoring, Computational Fluid Dynamics (CFD) and field trials has been used for the development of effective goaf inertisation strategies in underground coal mines.

TL;DR: Wang et al. as mentioned in this paper showed that surface dimple-texture made by pellet-pressing is beneficial to improve tribological properties lubricated by engine oil under 10N load and 5mm/s sliding speed.

TL;DR: In this article, an Acoustic Emitting (AE) technique was used to monitor the production of the micro-cracks development and the failure process in the rock test sample continuously and in real-time.

TL;DR: Based on theoretical analysis, 7 kinds of model compounds have been chosen in this paper, which are hyacinthin, anisole, diphenylmethane, phenetole, benzyl alcohol, benzhydrol, and aphenylpropanol.

TL;DR: In this paper, the authors performed a detailed analysis of coal samples collected from Xiqu, Antaibao and Heidaigou coal preparation plants, China and showed that the partitioning behavior of a given element during the cleaning process is mainly controlled by its modes of occurrence, the distribution forms of its carrier minerals and the cleaning technique types.

TL;DR: In this article, the cumulative sources, paths, and main performances of the environmental cumulative effects on underground coal mining region are analyzed, and the existence of synergistic effects among all environmental factors is pointed out, with some suggestions proposed for future research.

TL;DR: In this article, the authors summarized the rheological characteristics, failure, instability modes at high temperature and high pressure, rules of elastic modulus and thermal expand coefficient changing with temperature, as well as the thermalinduced failure characteristics of rock affected by temperature and pressure, and finally prospects the research directions of high temperature rock mechanics.

TL;DR: In this paper, the influence of micro-properties of granular material on the macroscopic stress-strain behaviour observed in the numerical simulation with the discrete element method (DEM) was investigated.

TL;DR: In this article, microscopic measurements of 189 polished coal surfaces show that there are commonly two kinds of microfractures: the exomicrofracture formed by tectonic stress and the endo-microfraction formed within certain macerals as the result of peat formation and coalification.

TL;DR: In this paper, the development, current situation, and issue of slicing mining, top-coal caving, and coal seams cutting sufficient height with fully mechanized mining technology are systematically analyzed.

TL;DR: In this article, the authors used the granger causality test procedure to examine the differences of causal relationships between coal consumption and GDP in major developed and developing countries based on data during the period from 1980 to 2005.

TL;DR: Wang et al. as mentioned in this paper investigated thermal source in mine, some surrounding factors that arouse heat hazard are analyzed, and by studying evaluation index of heat hazard, the concept of the synthesis-reduced temperature (SRT ) and its evaluation criteria are put forward, which is a new method for evaluating the degree of heat hazards in high-temperature mine.

TL;DR: Wang et al. as mentioned in this paper used AUTODYN software to make borehole blasting numerical simulation, and compared theoretical analysis with numerical simulation methods in roof-weaken of coal mine by blasting, they got that the scene blasting fracture and monitoring coal mine press regulation verified the conclusion of study.

TL;DR: This paper presents a recent study that investigates effective and efficient GIS-based approaches to the representation, organisation and access of disaster information that includes logical data models for representing disastrous events, the object-relational approach to database implementation, and internet-based user-interfaces that supports multi-mode database queries and flexible facilities for report generation.

TL;DR: By applying theory of liquid-solid two-phase flow, the location and process of wear on pump are analyzed as mentioned in this paper, and the results are consistent with the real wear situation. But the simulation results showed that there will be pits on the surface of flow components due to the impacting of coal particles with certain diameter, shape, impacting velocity and invasive angle.

TL;DR: In this paper, the floatability and liberation characteristics of a hard-to-float high-ash fine coal collected in Kailuan mining area were investigated experimentally, and four separation processes were put forward and evaluated.