基于未确知测度理论的巷道围岩稳定性研究

金属矿山地下围岩的稳定程度是矿山开采设计、安全生产的重要影响因素，而围岩稳定性受到多种因素影响和制约，且该类因素多具有不确定性、非线性和隐蔽性，无法进行定量表征，因此，给围岩稳定性评价带来了挑战。为对江西省某地下钽铌矿山围岩稳定性进行客观、准确评价，结合未确知测度理论的优点，构建了该矿山417 m中段围岩稳定性评价的综合模型。采用差异系数法对G_1法和熵值法计算出的主观、客观权值进行优化组合，确定评价对象的多指标综合未确知测度；结合矿山实际情况，考虑各影响因素，筛选出以岩石质量指标RQD、岩石单轴抗压强度、岩体完整性系数、地应力、隙壁状态和地下水状况6项因素作为评价指标；最后基于最小未确知测度距离判别准则，对该矿417 m中段围岩稳定性进行了评价，得出该中段围岩的稳定性等级为III级（基本稳定）的结论。研究结果可为该矿山后续开采设计和施工提供一定的指导。

Study on Surrounding Rock Stability of Roadway Based on Unascertained Measurement Theory

The stability of underground surrounding rock is an important factor that affect mining design and safe production.The stability of surrounding rock is affected and restricted by many factors，and many of these factors are uncertain， non-linear， and hidden.Can not be quantified，Therefore，it brings challenges to the stability evaluation of surrounding rock.In order to evaluate the stability of the surrounding rock of an underground tantalum niobium mine in Jiangxi Province accurately and scientifically，a comprehensive model for the stability evaluation of the surrounding rock of the 417 m middle section of the mine is established by using the unascertained measurement theory.The subjective and objective weights calculated by the G_1 method and the entropy method are optimized by using the difference coefficient method，and the comprehensive unascertained measure of the evaluation object is determined.Combined with the actual situation of the mine，considering the influencing factors，six factors are taken as the evaluation indexes:rock quality designation （RQD），rock uniaxial compressive strength，rock integrity coefficient，in-situ stress，gap wall state and groundwater state.Qualitative evaluation shows that the stability grade of the surrounding rock in the middle 417 m is grade III（basically stable）.The study results can provide some guidance for the future mining design and construction of the mine.