外文翻译--采场底板岩层应力的分析模型及应用.doc

英文原文:
Analytical model and application of stress
distribution on mining coal floor
ZHU Shu-yun1,JIAN Zhen-quan1,HOU Hong-liang2,XIAO Wei-guo1,YAO Pu1
1School of Resources and Earth Science,China University of Mining & Technology,Xuzhou,Jiangsu 221008,China
2Department of Prevention and Treatment for Coal Mine Water,Zhengzhou Coal Group Ltd Co,Xinmi,Henan 452371,China
Abstract:Given the analysis of underground pressure,a stress calculation model of cola floor stress has been established based on a theory of model presents the law of stress distribution on the relatively fixed position of the mining coal floor:the extent of stress variation in a fixed floor position decreases gradually along with decreasing rate of the vertical stress is clearly larger than that of the horizontal stress at a specific direction of the maximum principal stress changes gradually from a vertical direction to a horizontal direction with the advance of the working deformation and permeability of the rock mass of the coal floor are obtained by contrasting the difference of the principal stress established from theoretical calculations with curves of stress-strain and permeability-strain from is an important mechanical basis for preventing water inrush from confined aquifers.
Key words:model;coal floor;stress distribution;analysis
1 Introduction
With the development of coal seam mining,The stress field of rock strata of coal seam floors will change and continue to be redistributed because of the effect of results will bring on floor deformation,displacement and possible destruction to attain a new balance[1].A study of the law of stress distribution of floors has important,practical implications in understanding deformation and destructive characteristics and predicting water inrush from floors and for designing suitable locations for tunnels and selecting maintenance methods when depth present,the study