摘要
近矿体巷道围岩稳定性与开采扰动密切相关,本文以大柴旦矿业有限公司青龙沟北矿段深部西矿体及3280北风井回风巷道为主要研究对象,基于现场地质调查和室内岩石力学试验,对岩体质量进行分级和岩体力学参数进行估算;依据矿山生产计划,建立数值计算模型,分析位移规律及采动应力演化过程。结果表明:随着深部西矿体开采工作的进行,巷道变形整体较小,并向采场方向倾斜移动;随着开采深度增加巷道右帮、拱肩应力集中区域与顶板应力较低区域呈顺时针转动,在开采完5个中段后后续矿体的开采对巷道周围应力分布影响较小;3280北风井回风巷道及左侧斜坡道、二者间联络道出现了应力集中现象,针对千枚岩岩体质量较差应在全面了解该区域岩体质量后进行支护优化设计。
The stability of surrounding rock of roadways near the ore body is closely related to the mining disturbance.Taking the deep west orebody of Qinglonggou North Mining section and the return roadway of 3280 north wind shaft of Dachaidan Mining as the main research objects,field geological investigation and indoor rock mechanics tests are carried out,and then the rock mass quality classification and rock mass mechanics parameter estimation are carried out.According to the mine production plan,the numerical simulation model is established to analyze the displacement law and the evolution process of mining stress.The results show that with the development of deep west orebody mining work,the roadway deformation is small on the whole,and it moves towards the stope direction.With the increase of mining depth,the stress concentration area of the right side and spandrel of the roadway rotates clockwise with the lower stress area of the roof,and the subsequent mining of orebodies has little influence on the stress distribution around the roadway after the mining of 5 middle sections.There is a phenomenon of stress concentration in the return air roadway of 3280 north wind shaft,the left slope and the connecting road between them.In view of the poor quality of phyllite rock mass,the quality of rock mass in this area should be comprehensively understood and the support design should be optimized.
作者
张武
赵兴东
于文龙
秦绍龙
胡学平
于梓丰
ZHANG Wu;ZHAO Xingdong;YU Wenlong;QIN Shaolong;HU Xueping;YU Zifeng(Norin Mining Limited,Beijing 100053,China;Key Laboratory of Ground Control Management Plan in Deep Metal Mines,National Mine Safety Administration,Shenyang 110819,China)
出处
《金属矿山》
CAS
北大核心
2024年第8期59-63,共5页
Metal Mine
基金
国家自然科学基金重点项目(编号:52130403)。
关键词
稳定性分析
数值模拟
巷道变形
采动应力
stability analysis
numerical simulation
roadway displacement
mining-induced stress
