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The room and pillar method pressure treatment and people mining column structure parameter study

Author: HuHuiMing
Tutor: ZhaoKui
School: Jiangxi University of Technology
Course: Mining engineering
Keywords: Room and pillar method Goaf People mining column Stope structure parameters Numerical Simulation Catastrophe theory
CLC: TD863
Type: Master's thesis
Year: 2011
Downloads: 80
Quote: 1
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Abstract


This article is mainly caused by the room and pillar mining of a gold mine in the ground pressure and people mining pillar stope structure parameters instead of the native pillaring study , the main contents are as follows : ( 1) field geological survey and goaf distribution law Statistics master orebody occurrence conditions the goaf distribution characteristics and structure of the surface characteristics , comprehensive evaluation method to analyze the stability of the current goaf , and combination of on-site roof displacement , the pillar stress as well as rock acoustic launch monitoring means of analysis and judgment of goaf ground pressure change . ( 2 ) the establishment of a three-dimensional numerical model to analyze the impact of the of deep orebody recovery of the stability of the goaf . With the continuous recovery of the ore body , the volume of the mined-out area and exposed area is increasing, and could easily lead the goaf roof caving occurred , wellbore wrong move , surface occurs collapse , leading to the goaf large area through , and caused large-scale pressure disasters , the huge hidden dangers to the mine production safety . Filling empty areas the formation the stress isolation with the approach goaf from filling effect and filling cost into account, come to the best filling area . ( 3 ) combined with the the people mining pillar deformation monitoring and analysis results , to study the cemented restorations mining column of mechanical load bearing mechanism , the results show that the the deep stope mining column withstand caused by the excavation of the weight of the plastic zone rock pillars and weight . Bieniawski pillar strength theory formula for the room and pillar method of roof rock failure mechanism , it calculated the middle stope structure parameters of deep stope structure parameters . ( 4 ) the use of FLAC 3D finite difference software simulation of deep orebody recovery stope stability of dynamic changes , and further verify the reasonableness of the stope structure parameters . ( 5) through the cusp catastrophe theory to establish pillars mutation model derived pillar instability and failure criterion , and the occurrence of instability when the amount of deformation jumps and energy release .

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CLC: > Industrial Technology > Mining Engineering > Mining > Metal ore mining > Precious metal mining
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