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Study on the Phenomenon of Dynamic Pressure of Strip Coal Pillar Recovery and Application

Author: LiChengLin
Tutor: PanLiYou
School: Shandong University of Science and Technology
Course: Engineering Mechanics
Keywords: Dynamic pressure Strip coal pillar Pillar Recovery Numerical Simulation Evaluate
CLC: TD823
Type: Master's thesis
Year: 2009
Downloads: 87
Quote: 0
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Abstract


In this paper, Tao Yang coal strip strip mining site based research background , using the method of theoretical analysis and experimental research , the main strip coal pillar mining and recovery process from a mechanical point of view , with a impact tendency seam occurs dynamic pressure destruction of natural law and the mechanical mechanism , establish the dynamic pressure strip coal pillar recovery mining model , analysis of various types of failure mode strip coal pillar recovery under different mechanical conditions . Comprehensive analysis of the impact pressure behavior characteristics , influencing factors of strip coal pillar mining dynamic pressure occurs . The mine pressure application of theory , analysis of the different types of coal capitals backplane stress field distribution law , combined with the stress characteristics of the different width of coal pillar , summed up the three types of stress distribution characteristics of strip coal pillar : general stress distribution , saddle -type stress distribution and the arched stress distribution state. Application of numerical simulation software RFPA simulation study of different types of coal pillar , combined with acoustic emission and damage mechanics research , analysis of the impact of the relationship between the different types of coal pillar failure mechanism and geological structure of the coal and rock damage , verify strip coal pillar stress distribution law . Based strip coal pillar stress distribution law , theory of the comprehensive utilization cuttings law monitoring , numerical simulation research for strip pillar mining coal column the overwhelm -type , the floor failure - destruction , the high stress area bands risk prediction , and summarize the bar back to the prevention and control of mining impact phenomena . Combined with the results of this study , for Taoyang ore strip with face the actual geological mining conditions , the impact risk analysis and evaluation , risk assessment provides a theoretical basis for the site dynamic pressure , perfected in strip coal pillar recovery dynamic pressure risk assessment theory and method .

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CLC: > Industrial Technology > Mining Engineering > Mining > Coal mining > Underground mining methods
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