地下铝土矿山顶板稳定性分析及事故预防管理

Stability Analysis and accident prevention management of underground bauxite mine roof

准确划分巷道围岩等级类别是评价地下工程安全与稳定性的基础。针对山西省吕梁市兴县地下铝土矿山巷道冒顶问题,结合现场勘探与工程实测,从巷道顶板岩性、岩石结构及其坚固性系数分析入手,划分并制定了五级标准顶板和五级围岩稳定性分类。在此基础上,通过深入分析巷道变形破坏特征,针对性制定出了五级围岩对应的支护方案;阐述并提出了地下铝土矿山井巷顶板管理办法,指出在管理方面应从制度建设、危险源辨识与隐患排查、教育培训、流程管理、应急处置五个方面进行细化分析,以形成全流程、全链条的顶板闭环管理模式。研究成果可为铝土矿山巷道围岩稳定性分析和工程事故预防提供理论依据和工程应用价值。

The accurate classification of roadway surrounding rock grades is the basis for evaluating the safety and stability of underground engineering.Aiming at the problem of roof falling in underground bauxite mine in Xingxian County,Lvliang City,Shanxi Province,combined with field exploration and engineering measurement,the five-level standard roof and five-level surrounding rock stability classification are divided and formulated from the analysis of roof lithology,rock structure and robustness coefficient of roadway roof.On this basis,through the in-depth analysis of the deformation and failure characteristics of the roadway,the corresponding support scheme of the fifth-grade surrounding rock is formulated.This paper expounds and puts forward the roof management method of underground bauxite mine,and points out that the management should be detailed analysis from five aspects:system construction,hazard source identification and hidden trouble investigation,education and training,process management and emergency disposal,so as to form a whole-process and whole-chain closed-loop roof management mode.The research results can provide theoretical basis and engineering application value for the stability analysis of roadway surrounding rock and engineering accident prevention in bauxite mines.