摘要
依据程潮铁矿地表变形、岩体变形和井筒裂缝监测资料,分析东主井井筒变形破坏的成因,总结井筒裂缝分布规律及其与采空区的关系,通过数值分析探讨井筒继续使用的可行性。结合后期对地表与深部岩体较为详细的监测资料,建立了倾倒破坏力学模型,探讨井筒裂缝扩展与井区岩体水平位移之间的关系以及井区岩体分区与井筒裂缝分布之间的关系。研究结果表明,东主井变形破坏是由地下采矿引起的,岩体水平位移对井筒变形破坏起重要作用;井筒的裂缝分布在空间上与采空区的位置有关,井筒的东面和西面裂缝发育,南面和北面基本无裂缝。由数值计算结果可知,井区地表与岩体变形将继续加大,但不会发生整体失稳破坏。对比岩体分区与裂缝分布发现,井筒的裂缝分布在深度方向上与井区岩体分区有很好的对应关系。
Based on results of surface deformation and shaft cracks monitoring of Chengchao iron mine, the damage reasons of East main shaft are analyzed, by ways of numerical simulation; and then the feasibility of continuous use of shaft is discussed. By using post detailed monitoring data of ground and deep rock mass, a mechanical model for toppling failure is established. The relation between shaft's crack growth and rock mass horizontal displacement and rock zone in East shaft area is discussed. The results show that: damage of the shaft is caused by underground mining. Horizontal displacement of rock mass has vital effact in shaft damage. The distribution of shaft cracks is related to goaf's location; there are a lot of cracks on the East and West of east main shaft; but south and north are little. Numerical analysis results show that deformation of surface and deep rock mass will further increase along with the mining activities extend to depth; but deformation of deep rock still too small to lead to entire failure. Crack distribution in vertical direction is related to rock engineering zone by comparison.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2017年第S1期331-342,共12页
Rock and Soil Mechanics
基金
国家自然科学基金青年基金项目(No.41602325
No.11602284)
国家自然科学基金面上项目(No.11472293)~~
关键词
竖井
变形破坏
地下采矿
可行性探讨
岩体分区
数值分析
shaft
deformation and damage
underground mining
feasibility study
rock zone
numerical analysis
