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Study of Warter-Inrush Geological Abnormal Bodies Detection Experiment with Resistivity Method Responding Character in the Working Face

Author: MouYi
Tutor: ChengJiuLong
School: Shandong University of Science and Technology
Course: Earth Exploration and Information Technology
Keywords: Face water inrush Resistivity Sink physical simulation Bipolar - Bipolar devices Resistivity CT
CLC: TD741
Type: Master's thesis
Year: 2009
Downloads: 95
Quote: 1
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Abstract


In recent years, with the increasing depth of coal mining, coal face increasing spatial scale, underground construction driving speed obviously improved, resulting in various forms, there is water damage, water damage threat level increases. Water inrush types are also becoming more complex, from the tunnel face the water, the water tunnel face suddenly turned into water, water inrush gob lag. So how to detect abnormal body structure coalface aquifer and its spatial distribution patterns, looking for anomalies physical differences become problems to be solved. In this paper, a large sink physical simulation of mine water inrush face geological anomalies exist in case of resistivity response characteristics for the use of resistivity methods for detecting water inrush face lay the theoretical foundation for the mine water hazard control with a more important theoretical significance and practical value. Thesis by physical simulation, and conducted physical modeling and numerical simulation of comparative analysis and resistivity inversion section CT preparation software. In physical simulation, by the degree of oxidation of electrodes, power supply and measuring pole pitch pole pitch, boundary effects, the supply voltage and other experimental factors were analyzed to optimize the experimental program; in the whole space conditions using a bipolar - bipolar device resistance Rate CT method for face plate various geological anomaly detection models were analyzed concealed Aquifer different depths, different combinations, different water saturation and impedance response characteristics abnormal bulge under the conditions, draw moisture resistivity shallower body depth, the more obvious the response characteristics of the electric field; Aquifer conductive body horizontal resolution than vertical high resolution; conductive body has a more obvious than the high resistivity response characteristics of the electric field. In the numerical simulation, physical simulation in accordance with the similarity ratio of 100:1, the establishment of a numerical simulation model to plate Aquifer, for example, the numerical simulation and physical simulation ΔU curves were compared to verify the physical simulation using numerical simulation experimental possibilities. In the inversion process, using VB programming language, and Excel database file combining CT preparation resistivity inversion software, and the inversion results using Surfer preparing 2D plans, by setting different grid size and contour interval Analysis of mapping results, the overall high lateral resolution, vertical resolution is low. Research shows that the use of bipolar - Bipolar devices resistivity method physics simulation analysis of water inrush face resistivity response characteristics can be achieved very good results.

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CLC: > Industrial Technology > Mining Engineering > Mine safety and labor protection > Mine drainage and water shutoff > Mine hydrogeological
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