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Shanxi, China

Zhao Y.,Fenxi Mining Group Co. | Wang H.,Taiyuan University of Technology | Sun Y.,China National Petroleum Corporation
Advanced Materials Research | Year: 2012

This paper uses the finite element simulation system of the anisotropic elastic wave to simulate the two component wave field characteristics of the HTI medium in the coal-seam with fractures. The simulation results of the single shot record indicate that when the coal-seam contains fracture. The wave field characteristics under different fracture parameters are observed through the single shot record. The influences can be found mainly in the energy and amplitude vers offset characteristics. The characteristics of x component and z component are different. This may provide some experimental references to fracture detection using the PS-wave.

Liu S.-W.,Henan Polytechnic University | Zhang H.,Henan Polytechnic University | Li Y.-H.,Henan Polytechnic University | Zhang X.,Henan Polytechnic University | Yao B.-Z.,Fenxi Mining Group Co.
Meitan Xuebao/Journal of the China Coal Society | Year: 2013

The present classifications of coal roof stability have many problems, such as large amount of calculation, too much human labor and low degree of intelligence, which cannot provide guidance for mine production. Based on the real situation in coal mine, authors gave determining factors to coal roof stability. Using Analytic Hierarchy Process and Fuzzy Clustering Method as its core, established the coal seam roof stability hierarchical analysis model and concluded the membership of the influence factors and synthetic operation method. With Visual Basic 6.0 for compilation environment, used Matlab and Surfer to make secondary mixed programming, Analysed the drilling data and geological data and draw partition map of coal roof stability to form partition system. Applied the research results to No.3 coal seam of Hexi Coal Mine and validated the prediction by observing the drilling.

Wei L.-B.,China University of Mining and Technology | Meng L.-C.,China University of Mining and Technology | Meng L.-C.,Fenxi Mining Group Co. | Cheng X.-F.,China University of Mining and Technology | And 2 more authors.
Meitan Xuebao/Journal of the China Coal Society | Year: 2016

The theoretical and numerical simulation research on dense medium separation involves the rheological properties of suspensions. The apparent viscosities in different conditions of dense-medium suspension were determined to study the influence of density, volumetric concentration and coal slime content on the rheological properties of medium suspension used in coal preparation. Linear fitting method was used to reduce the effect of particles sedimentation when measuring the apparent viscosity by the rotational viscometer on the range of density 1.45-1.80 g/cm3 and coal slime content 0-0.30. The experiment results show that the dense medium suspension used in coal preparation is pseudoplastic fluid. When the volumetric concentration is constant, consistency coefficient decreases approximately linearly, and power law exponent increases with the increment of coal slime content. Under the condition of constant coal slime content, consistency coefficient increases approximately linearly, and power law exponent decreases with the volumetric concentration increasing. The equations for calculating consistency coefficient and power law exponent were put forward under the general conditions in industrial application of dense medium coal preparation respectively, and the relative deviation of the approximate formulas is less than ±10%. © 2016, China Coal Society. All right reserved.

Yang R.-S.,China University of Mining and Technology | Ma X.-M.,China University of Mining and Technology | Li Q.,China University of Mining and Technology | Zhang J.,China University of Mining and Technology | And 3 more authors.
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | Year: 2013

Concerned with geology condition, production conditions, mining conditions and rock mechanics, supporting schemes of mine tunnel is an involved problem of theory and technology. Aiming at the above-mentioned problem, the expert system of roadway supporting schemes for coal mine combines expert experience, typical engineering cases and theoretical achievements with artificial intelligence technology; establishes content-rich knowledge base of expert experience, typical engineering cases and theoretical research achievements; adopts initial program for roadway support inferred from two methods of rules and typical cases; builds the program for the roadway support model and compiles into dynamic-link library files loaded and invoked based on the secondary development technology of FLAC3D; realizes optimization of the roadway support on the basis of the initial program and generates sectional chart of roadway support automatically. An application example is presented in coal mine in Shanxi province; the results prove that the system optimization scheme is reasonable and feasible.

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