文档介绍：密级: 学校代码:10075
分类号: 学号:20101298
工学硕士学位论文
大型金属矿山深部地应力变化及其
对岩体移动变形影响分析
学位申请人: 汪琦
指导教师: 李文秀教授
学位类别: 工学硕士
学科专业: 岩土工程
授予单位: 河北大学
答辩日期: 二〇一三年五月
Classified Index: CODE: 10075
U. D. C. NO: 20101298
A Dissertation for the degree of M. Engineering
Analysis of In-situ Stress and Its Influence
on Rockmass Displacement and
Deformation Due to Deep Underground
Mining of Metal Orebody
Candidate: Wang Qi
Supervisor: Prof. Li Wenxiu
Academic Degree Applied for: Master of Engineering
Specialty: Geotechnical Engineering
University: Hebei University
Date of Oral Examination: May, 2013
摘要
摘要
随着工业迅速发展对能源需求量的增加和资源开采强度的不断加大,浅部资源逐渐
枯竭,国内外越来越多的矿山进入了深部开采。随着开采深度的增加,对于深部地应力
场及其对岩体移动变形影响的预测分析已迫在眉睫。本文依据小官庄铁矿深部地应力测
试结果和采空区岩体移动变形监测结果,对小官庄铁矿深部地应力场的分布规律进行了
具体讨论分析。分析结果表明,受采区断层的影响,水平构造应力场影响明显。最大水
平主应力与巷道轴向夹角的大小与巷道变形有关;且深部开采引起的岩层移动范围逐渐
增大。为了进一步讨论以断裂构造为主的采区深部地应力场及其分布规律,本文依据实
际工程情况进行建模,利用 ANSYS 软件进行了地应力场的数值模拟,并对计算结果进行
了探讨性分析。分析结果表明:断层附近最大水平主应力的方位接近于断层走向,断层
的存在对区域主应力方位具有明显的影响;随着开采深度的不断增加,地表下沉值和水
平移动变形值将随之增加,且影响范围不断增大;采空区以水平构造应力场为主导,水
平移动影响范围大于地表下沉影响范围。
关键词深部开采水平应力岩体移动断层
I
Abstract
Abstract
Along with the rapid development of industry increased demand for energy and
resources exploitation strength increasing, the earth's crust shallow resources have dried up.
More and more mines have gone into the state of deep mining at home and abroad. With the
increase of mining depth, the new rock mechanics problems arose in the process of mining.
Understanding the characteristics of deep geostress field has been imminent. Based on the
results of deep in-situ stress measuring and rock mass deformation monitoring, the
distributing law of the in-situ stress field is analyzed in Xiaoguangzhuang iron mine. The
results showed that the geostress field was dominated by horizontal stress, which influenced
by the fault in mining area. Deformation of t