CAJ | 학술논문

以大量实测资料为基础,分析官庄铁矿北区深埋破碎厚矿体开采引起的围岩变形和地表移动规律.实测结果表明,官庄铁矿北区地表下沉属于连续下沉,岩层破坏主要是缓慢型破坏.分析过程中,把几种实测分析方法和数值分析法有机结合在一起,形成岩体移动变形综合研究方法,对地下开采引起的岩体移动机制进行具体分析.分析中所采用的实测分析类方法包括蠕变试验分析、地表移动观测分析、围岩变形监测分析、原岩应力量测分析;数值分析类方法包括ANSYS和FLAC.结合官庄铁矿工程实例,通过具体测试分析,探讨深部开采岩体移动变形规律及特点,即深部开采覆岩移动变形具有均匀、整体压缩变形等特点,地表移动连续且周期较长.实践证明,所采用的综合研究方法是分析岩体移动和地表下沉机制的有效途径.
이대량실측자료위기출,분석관장철광북구심매파쇄후광체개채인기적위암변형화지표이동규률.실측결과표명,관장철광북구지표하침속우련속하침,암층파배주요시완만형파배.분석과정중,파궤충실측분석방법화수치분석법유궤결합재일기,형성암체이동변형종합연구방법,대지하개채인기적암체이동궤제진행구체분석.분석중소채용적실측분석류방법포괄연변시험분석、지표이동관측분석、위암변형감측분석、원암응역량측분석;수치분석류방법포괄ANSYS화FLAC.결합관장철광공정실례,통과구체측시분석,탐토심부개채암체이동변형규률급특점,즉심부개채복암이동변형구유균균、정체압축변형등특점,지표이동련속차주기교장.실천증명,소채용적종합연구방법시분석암체이동화지표하침궤제적유효도경.
It is the purpose of this paper to discuss the problem of rock mass displacement and deformation due to deep underground mining of fractured thick iron orebody. The laws of ground surface subsidence and rock mass movement and deformation in north area of Guanzhuang iron mine due to deep underground mining are studied. The ground surface subsides continuously;and rock mass fails slowly in the mine. Based on the ground surface subsidence and surrounding rock deformation monitoring and numerical simulation methods,a comprehensive method is put forward to analyze the displacement and deformation mechanism of rock mass due to underground mining. Several measurement and analytical methods have been given for predictions and analyses of rockmass dispacements and deformations due to deep mining of fractured thick iron orebody. They are classified as meaurement methods(creep analyses,ground movements analyses,surrounding rock deformations analyses and in-situ stress measurements) and numerical methods(ANSYS and FLAC). New monitoring data have been analyzed to study the rock mass deformations due to deep mining of fractured thick iron orebody in Guanzhuang iron mine. It has also been compared to the results obtained by numerical analyses. By mechanical analysis as well as case study,rock mass deformation and ground subsidence caused by the deep iron ore mining are studied. The results show that the displacements of overburden layer are characterized by uniform and entire compression,displacements and deformations. The laws of surface subsidences are that the surface deformations are continual and slow with a long last period of movement. A case study shows that this method is an available approach to investigate the mechanism of rock mass deformation and ground surface subsidence.