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The cumulative effect of air pollution could be caused by the factors of time accumulation, space transfer, weather conditions and new air pollutant resulting from chemistry reactivity of several pollutants. In order to analyze the control strategies of the cumulative effect of air pollution, the analytic network process (ANP) is embedded into SWOT for a best quantitative alternative. Finally, an...
The present study involved two key procedures: (1) Input-output table including energy consumption is built and some parameters, such as coefficient of industrial correlation, energy consumption per unit of output value and elasticity ratio of energy consumption, are calculated. (2)Based on characteristics of industrial correlation and energy consumption four industry classes (I, II, III, IV) are...
This paper presents automatic threshold classification of decision tree. Taking Lu'an mine area as an example, the land use information from 1993 and 2000 year's TM images are extracted. The classification results reach relevant accuracy requirements, from which 1993–2000 conversion matrix of land use is attained. That will help to analyze the causes of the land-use changes so as to provide a strong...
Coal is a main primary energy sources in China. The regional coal transportation of closed loop in China reflects on inter- or intra- regional interaction of energy economy. This paper uses 0–1 linear programming to decompose the matrices of coal transportation on eight regions of mainland China to two hierarchies sub-matrices. We figure out the top-two hierarchies regional coal transportation of...
The coal gangue by directly discharging and accumulating has seriously destroyed the ecological environment and has been one of big obstacles for coal mines. Based on the green mining theory, the total three influential factors to destruct environment by gangue hill are researched, and a set of technology with gangue backfilling and complicated coal pillar resource mining is put forward. Meanwhile,...
On the basis of summarizing Tengzhou coalfield stratigraphic structure, we analyze the stratigraphic sequence of the coalfield Carboniferous-Permian coal-bearing strata and study the sulfur distribution characteristics of Taiyuan Formation 17th, 16th and the lower 12th coal seams as well as Shanxi lower and upper 3th coal seams, obtaining the vertical and lateral evolutions of sulfur content in each...
In this paper, Yushenfu mining area is taken as an example. On the basis of analysis and research of formation mechanism of mining subsidence, using principal component analysis and grey correlation analysis method, factors which affect the damage degree of mining subsidence have been selected. It is determined that disturbance coefficient, the ratio of width to depth, comprehensive hardness of overlying...
As one of widely used methods in calculating temperature field under single-row-pipe freezing, the Sanger & Sayles Formula yet bears certain error and inaccuracy. In order to investigate the sensibility and applicability of the Sanger & Sayles Formula, numerical calculation is adopted here to check against the formula result with regard to average temperature and thickness of the frozen soil...
Removal of fine particles by heterogeneous condensation was investigated experimentally for the double-alkali desulfurization process in this paper. A supersaturated vapor phase, necessary for condensational growth of fine particles, was achieved in the SO2 absorption zone by adding steam in the gas inlet and between the pieces of rotating-stream-tray, respectively. The influences of temperature of...
Exploration and development of the deep part coal resource have important strategic meanings for Chinese economic. However, the seismic of strata in deep part is always suffering from the decline of resolution. To overcome this problem, we propose a method to improve resolution of seismic data by spectrum whitening in time-frequency domain. Compared with conventional algorithm, our method enhances...
Based on the data obtained from the exploration for coal and coalbed methane, the characteristics of coalbed methane reservoir in the North Qinshui Basin is discussed systematically. The description on the reservoir property (including coalbed geometry, gas content, adsorption, physical property of the coal, reservoir pressure etc.) and controlling factors (including the structure, sealing condition,...
Hierarchical clustering analysis is one basic multivariate statistical instrument which is used in classifying research in multifarious fields widely. The most three common clustering methods are Single Linkage Method, Group Average Method and Ward Method in hierarchical clustering analysis. As it is about to confirm the sources, approaches and conditions of water leakage in BaYi tunnel, this article...
With the increase of mining depth, the mechanical feathers and mechanical behaviors could become more and more serious in the complex mechanical environment of “three-high and one-disturbance”. The solid rock in shallow mining shows nonlinear mechanical characteristics of soft rocks while entering deep mining, such as large deformation, high underground pressure, difficult to support, etc. The rheological...
To understand the chemical composition and temporal variations of atmospheric precipitation, the precipitation samples were collected and analyzed continuously from March 2007 to October 2007 in Lanzhou, a city located in the semiarid zone of Northwest China. All samples were analyzed for pH, electric conductivity and major ions (F−, Cl−, NO2−, Br−, NO3−, SO42−, Na+, NH4+, K+, Ca2+ and Mg2+). The...
The effect of metallurgical property of coke and the formation of sulfide phase added with CaO, Fe2O3 and La2O3 have been investigated using contrast test and XRD phase analysis. The results indicate that additives have little impact on coke dropping broken strength, but the wear strength of coke is deteriorated with CaO and Fe2O3 addition and improved with La2O3. The coke reactivity is increased...
Shanxi Province is Rich in coal resources. For a long time, large-scale, extremely intense coal mining activities severely damaged the eco-geological environment in the mining areas, which restricts the regional social and economic sustainable development. This article discusses in detail the main types and features on eco-geological environment problems caused by coal mining in Shanxi Province, and...
The physical characteristics, ignition performance and combustion characteristic of SDBF were analyzed in this paper. It indicates that the physical of SDBF is close to the coal in density, Calorific value and other aspects. The ignition performance has the tendency to biomass straw, but the ignition temperature became higher than the straw. The combustion characteristic is about the same like coal,...
Gaussian regularization is an effective method to improve the generalization ability of neural networks. A Gaussian regularization RBF neural network (GRNN) which combines the advantages of RAN, and regularization is proposed in this paper. And a model using GRNN is presented to predict the ash fusion temperature (AFT) for some Chinese coals Compared with the traditional techniques, the GRNN prediction...
The mineral resource exploitation plays an important role in China's economic development, but it also causes many environmental problems, especially ecological problem. In coal mining, in order to achieve sustainable use of these resources, we must pay special attention to eco-environmental protection. This article first briefly introduced the current status of environmental impact assessment (EIA)...
Due to restriction of product condition, dust pollution treatment scheme with coal warehouse roof in coal wahery is impossible to be determined after several installation commissioning and testing. In order to choose appropriate dust control scheme, according to numerical simulation method, this paper simulates two kinds of feasible dust control schemes with the fluid calculation software, analyses...
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