空气反循环连续取样技术在国外已得到广泛应用,被钻探界人士称之为继绳索取心之后的又一次技术革命。乌山铜钼矿应用的空气反循环连续取样钻机具有不提钻连续取样、缩分功能,同时还能对孔深、转速、钻压、孔内和机身出现的异常情况进行...空气反循环连续取样技术在国外已得到广泛应用,被钻探界人士称之为继绳索取心之后的又一次技术革命。乌山铜钼矿应用的空气反循环连续取样钻机具有不提钻连续取样、缩分功能,同时还能对孔深、转速、钻压、孔内和机身出现的异常情况进行实时监控,实现了人机一体化的智能钻进模式。详细介绍了ROC L 825型空气反循环连续取样钻机的主要技术参数和特点以及在生产勘探中的应用情况。ROC L 825型空气反循环连续取样钻机在乌山铜钼矿的应用,对矿岩界线的圈定、矿体边界品位控制、合理采矿配矿,起到了很好的作用,不仅使矿产资源得到合理的开发和利用,降低了生产成本,同时提高了企业的综合经济效益。展开更多
At present,the thrust of an anti-slide pile can be worked out with some calculation methods. However,the resistance in front of the pile,the distributions of resistance and thrust,and appropriate pile length cannot be...At present,the thrust of an anti-slide pile can be worked out with some calculation methods. However,the resistance in front of the pile,the distributions of resistance and thrust,and appropriate pile length cannot be easily obtained. In this paper,the authors applied the strength-reduction finite element method (FEM) to several design cases of anti-slide piles. Using this method,it is possible to take the pile-soil interactions into consideration,obtain reasonable resistance in front of pile and the distributions of thrust and resistance,and reasonable lengths of anti-slide piles. In particular,the thrust and resistance imposed on embedded anti-slide piles can be calculated and composite anti-slide pile structures such as anchored piles and braced piles can be optimized. It is proved through the calculation examples that this method is more reliable and economical in the design of anti-slide pile.展开更多
文摘空气反循环连续取样技术在国外已得到广泛应用,被钻探界人士称之为继绳索取心之后的又一次技术革命。乌山铜钼矿应用的空气反循环连续取样钻机具有不提钻连续取样、缩分功能,同时还能对孔深、转速、钻压、孔内和机身出现的异常情况进行实时监控,实现了人机一体化的智能钻进模式。详细介绍了ROC L 825型空气反循环连续取样钻机的主要技术参数和特点以及在生产勘探中的应用情况。ROC L 825型空气反循环连续取样钻机在乌山铜钼矿的应用,对矿岩界线的圈定、矿体边界品位控制、合理采矿配矿,起到了很好的作用,不仅使矿产资源得到合理的开发和利用,降低了生产成本,同时提高了企业的综合经济效益。
基金This research was funded by the National Natural Science Foundation of China (Grant No.40872191)NSF of Chongqing(Grant No. CSTC2009BB6178)
文摘At present,the thrust of an anti-slide pile can be worked out with some calculation methods. However,the resistance in front of the pile,the distributions of resistance and thrust,and appropriate pile length cannot be easily obtained. In this paper,the authors applied the strength-reduction finite element method (FEM) to several design cases of anti-slide piles. Using this method,it is possible to take the pile-soil interactions into consideration,obtain reasonable resistance in front of pile and the distributions of thrust and resistance,and reasonable lengths of anti-slide piles. In particular,the thrust and resistance imposed on embedded anti-slide piles can be calculated and composite anti-slide pile structures such as anchored piles and braced piles can be optimized. It is proved through the calculation examples that this method is more reliable and economical in the design of anti-slide pile.
