金属矿山复杂采空区稳定性模糊评价体系研究

Study on Fuzzy Evaluation System of the Complex Goaf Stability in Metal Mine

利用综合极限跨度法、Mathews稳定图法等采空区稳定性评价方法中的主要影响因素,汇总形成多级采空区稳定性评价指标,采用层次分析法获得各影响因素的权重,结合模糊评价方法综合分析采空区的稳定性,得到一种适用于金属矿山复杂采空区稳定性分析的模糊评价体系。研究结果表明:技术因素对地下采空区稳定性影响最大,采空区跨度对采空区稳定性影响权重达到31.8%,是最重要的影响因素,其次是采空区面积和岩体质量。基于模糊数学理论和层次分析法建立的由因素集合、权重集合和评价集合组成的采空区稳定性评价指标体系是采空区稳定性评价的有效方法,研究成果可为后期采空区治理及监测提供参考。

The main influencing factors in the comprehensive limit span method,Mathews stability diagram method and other goaf stability evaluation methods were summarized to form the multi-stage goaf stability evaluation indexes,and the weight of each influencing factor was obtained by the analytic hierarchy process.Then combined with the fuzzy evaluation method,the stability of goaf was analyzed comprehensively,and a fuzzy evaluation system which was suitable for the stability analysis of complex goaf in metal mines was obtained.The results were concluded as follows.Technical factors had the greatest influence on the stability of underground goaf,and the influence weight of goaf span on the goaf stability reached 31.8%,which was the most important factor,followed by the goaf area and rock mass quality.The goaf stability evaluation index system based on fuzzy mathematical theory and analytic hierarchy process,which consisted of factor set,weight set and evaluation set,was an effective method for goaf stability evaluation.The research results can provide a reference for goaf control and monitoring in the later period.