摘要
针对某地下金属矿山采场采用大直径深孔分步爆破开采的实际,为了掌握采场围岩稳定性情况,运用二维有限元模拟软件Phase2对采场回采过程进行了分步数值模拟,分析采场的稳定性,对采场可能发生冒落或垮塌处进行预测。运用空区三维激光探测系统(CMS)对采场进行了现场探测,以CMS实测数据为基础生成采空区三维模型,提取采空区二维实际边界与数值模拟的结果进行对比分析,进而实现对采场稳定性模拟预测结果的实测验证。实践表明,实测结果与预测结果基本一致,验证了这种模拟预测方法的可靠性和有效性。该方法能有效地预计到大规模采场开采稳定性情况,并据此进一步改进大爆破回采工艺,从而实现安全、高效率开采。
In order to know the stability of the rocks surrounding the stope in some underground metal mine by using largediameter deep-hole blasting, two-dimensional finite element numerical simulation analysis software Phase2 was used to simulate stoping process step-by-step and analyze the stability of the stope, so as to predict the area with potential roof falling or collapse in the stope. The mined-out area was probed by three-dimensional cavity monitoring system（CMS） and a three-dimensional cavity model was generated based on the monitoring data, the two-dimensional cavity borderline was compared with the result of numerical simulation, which verified the predicted result. Practice indicates that the actual monitoring results are basically consistent with the predicted results, proving the reliability and validity of this simulation prediction method. This method can effectively predict the stability in stope mining, based on which bulk blasting technique can be improved then, so as to assure safe and efficient mining.
出处
《矿冶工程》
CAS
CSCD
北大核心
2009年第6期5-8,12,共5页
Mining and Metallurgical Engineering
基金
国家"十一五"科技支撑计划专题(2007BAK22B04-12
2006BAB02B04-1-3-1
2006BAB02B05-01-02-01)资助
关键词
大规模采场
稳定性
数值模拟
预测
实测验证
large-scale stope
stability
numerical simulation
prediction
monitoring validation
