复杂采空区群稳定性数值分析及安全分级评价

采空区已成为影响矿山安全生产的重大隐患。为了准确分析复杂采空区群的稳定性，加强矿山对采空区群的安全管控，基于某矿山采空区群精细探测数据，采用Geomagic、Midas GTS与FLAC3D的耦合建模以及数值模拟分析方法，对复杂采空区群进行稳定性分析；同时，以采空区类型、岩石抗压强度和暴露面积等16项指标建立了复杂采空区群的安全分级评价体系，开展了复杂采空区群安全分级评价。结果表明：大矿体采空区上盘及东南方向顶板存在垮落隐患；五盘区采空区西北方向顶板“跳板状”围岩在残矿回采过程中将发生大幅形变；主采区各采空区相隔的间柱存在较大的应力集中现象。结合采空区安全分级评价结果，提出了各采空区的处理措施建议。研究结果为同类矿山的采空区稳定性分析和安全分级评价提供了借鉴。

Stability Numerical Analysis and Safety Classification Evaluation of Complex Goaf Group

Goaf has become a major hidden danger affecting mine safety production.In order to accurately analyze the stability of complex goaf group and strengthen the safety control of goaf group in mine，based on the fine detection data of goaf group in a mine，a coupling modeling and numerical simulation analysis method of Geomagic，Midas GTS and FLAC3D was adopted to analyze the stability of complex goaf group.At the same time，the safety classification evaluation system of complex goaf group was established based on 16 indicators such as goaf type，rock compressive strength and exposed area，and the safety classification evaluation of complex goaf group was carried out.The results show that there are caving hazards in the hanging wall and southeastern roof of large ore body goaf.The ‘springboard’ rockmass in the northwest of the panel-5 will be deformed greatly in the process of residual ore mining.There is great stress concentration in the inter-pillar separated by each goaf in the main mining area.Combined with the safety classification evaluation results of goaf，the treatment measures of each goaf are proposed.The research results provide reference for the stability analysis and safety classification evaluation of mined-out areas in similar mines.