渝南煤矿地下转露天采场边坡角优化研究

Slope angle optimization research for transferring from underground to open-pit stope in Yu'nan Coal Mine

为了保证渝南煤矿露天开采生产安全,结合矿区地层物理力学参数,采用极限平衡法对采场边坡破坏模式进行分析;基于边坡破坏模式分析结果,建立各剖面的“边坡角-稳定性系数”函数曲线,对采场边坡角进行了优化。结果表明:渝南煤矿西采场P1剖面经过优化后最优边坡角为32°,东采场P_(2)、P_(3)剖面经过优化后最优边坡角为40°,P4剖面经过优化后最优边坡角为32°。

In order to ensure the safety of open-pit mining in Yu'nan Coal Mine,the article uses the limit equilibrium method to analyze the failure mode of stope slope combined with the physical and mechanical parameters of mining area.Based on the analysis results of slope failure mode,the article establishes the function curve of slope angle-stability coefficient of each section,and optimizes the slope angle of stope.The results show that the optimal slope angle of P1 section in west stope of Yu'nnan Coal Mine is 32°,the optimal slope angle of P_(2) and P_(3) sections in east stope is 40°,and the optimal slope angle of P4 section is 32°.