摘要
针对采场膏体强度设计问题,分析了充填体强度的影响因素;基于高水模型进一步修正并计算得出了采场需要的膏体强度;通过对井下无轨设备工作时充填体受力分析可知,充填体表面1.0m以内,满足铲运机运行的充填体强度为0.38～0.98MPa;借助于FLAC3D工程模拟软件建立了采场三维数值分析模型,通过数值分析得到了膏体强度与安全系数的关系方程式,确定了满足矿山采场需要的膏体强度为σv≥1.54MPa;通过应力场分析可知,矿石回采工作对上盘岩石影响程度较下盘明显;根据位移场分析得到,膏体在采场稳定的临界状态的最大沉降量为70.49mm,侧向最大位移量为72.88mm。
For the problem of paste strength design, the influ- encing factors of backfill strength were analyzed. The paste strength required by mining was calculated based on high-- water model. Backfill stress analysis showed that backfill strength to meet the need of LHD working was 0.38~0.98 MPa within upper 1.0m. On the basis of engineering simula- tion software FLAC3D, the three--dimensional numerical a- nalysis model of stope was established. Then, by numerical analysis the relationship equation between paste strength and safety factor was obtained, and the paste strength that can met the needs of mining was determined as≥1. 54 MPa. Ac-cording to the analysis of stress field,the influence degree of stoping on upper rock was more obvious than on footwall. The displacement analysis showed that the maximum settle- ment of paste was 70.49 mm and the lateral maximum dis- placement 72.88 mm when the paste was in the critical state of stability.
出处
《矿业研究与开发》
CAS
北大核心
2013年第2期18-21,27,共5页
Mining Research and Development
基金
长江学者和创新团队发展计划资助(IRT0950)
关键词
膏体强度
强度设计
高水模型
数值分析
Paste strength, Strength design, High- watermodel,Numerical analysis
