摘要
临界散体柱理论是通过散体侧压力来确定临界散体柱的高度,从而预测地表塌陷范围.以往散体侧压力的测试未考虑井下放矿对散体侧压力的影响,导致预测不准确.因此利用散体侧压力测试系统对流动散体侧压力进行了实验.通过对比散体侧压力的变化曲线,得出放矿过程对散体侧压力的影响.结果表明:下部放矿,仅对放矿口区域附近的散体侧压力产生影响,且影响范围较小,随着散体的沉实,散体侧压力将会进一步增大.同时结合古典杨森理论和临界散体柱理论,推导出在放矿情况下临界散体柱高度的计算方法;结合陷落角与采深的关系,为预测地表塌陷范围提供相关参考.
The critical medium column′s theory is used to determine critical medium column′s height using lateral pressure and predict surface subsidence range.Past lateral pressure tests usually lead to inaccurate forecasts without considering the influence of ore drawing on lateral pressure.So an experimental test on lateral pressure of bulk-solid medium was performed to measure the lateral pressure under ore drawing,and the effects of releasing bulk-solid medium on lateral pressure were got through the comparisons among the different heights.The result shows that the lateral pressure is effected at the vicinity of drawing hole under ore drawing,and the effects′range is little by releasing bulk-solid and lateral pressure increases with the consolidation of bulk-solid medium.Combined the critical medium column′s theory and the classical Janssen theory,the calculation of the critical medium column′s height under the effect of ore drawing was obtained.Then considered the relationship between mining height and the disturbed angle,reference for prediction of surface subsidence range was provided.
作者
刘洋
任凤玉
何荣兴
曹建立
LIU Yang;REN Feng-yu;HE Rong-xing;CAO Jian-li(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China)
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第3期416-420,共5页
Journal of Northeastern University(Natural Science)
基金
"十三五"国家重点研发计划项目(2016YFC0801600)
国家自然科学基金重点资助项目(51534003)
中央高校基本科研业务费专项资金资助项目(N150104006)
关键词
临界散体柱理论
散体侧压力
地表塌陷范围
实验研究
临界散体柱高度
放矿
critical medium column′s theory
lateral pressure
surface subsidence range
experimental study
critical medium column′s height
ore drawing
