摘要
分析了缓倾斜中厚矿体开采过程中,在地压控制和采场矿石运搬方面存在的困难,从充分发挥无轨设备的工作效率和回采作业的安全角度出发,提出“大盘区、小分段”的设计理念;通过数值模拟,分析了采空区顶板形状对采场稳定性的影响,强调了优化采空区顶板形状对控制采空区顶板稳定的重要性。试验结果表明在大红山矿区的岩层条件和原岩应力作用下,采空区的跨度不应大于20m。工业试验结果证明,以上述理论为基础提出的小分段空场开采嗣后尾砂与废石混合充填采矿工艺充分发挥了无轨采掘设备的效率,保证了采场顶板的稳定,改善了作业人员的工作条件,与传统的采矿工艺相比,生产效率提高了3倍以上。
Difficulty in field stress control and ore removal in the open stope was analyzed in the mining of gentle dip multi-strata ores of medium size. The theory of “larger stope and smaller span room” was put forward in regard of fully raising the working efficiency of trackless equipments and mining safety. The influence of the roof shape on room stability was analyzed by numerical methods. The importance of the optimization of room roof shape to the controlling roof stability was emphasized. The stope span affected by rock stratum and original field stress in Da Hong Mountain Mine is within 20 m. The results show that the technology of smaller span room mining following slurry and waste rock filling brought up on the basis of the above theory has improved the efficiency of trackless equipments greatly. The stability of room roof is under good control. The working conditions have been made much better, workers＇ labor intensity has been greatly decreased and the productivity has been raised more than 3 times compared with the traditional mining technology.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2005年第6期1107-1111,共5页
Journal of Central South University:Science and Technology
基金
云南省省院省校科技合作计划资助项目(2001)
关键词
缓倾斜中厚矿体
无轨采矿
采场稳定性
gentle dip ores of medium size
trackless mining
stability of stope
