基于功效系数法的采空区稳定性判别方法研究

Study on stability discrimination method of goaf based on efficiency coefficient method

矿石开采后遗留下的采空区,对矿山而言始终是一种安全隐患,采空区的稳定与否关系到矿山的生产安全。本文根据矿山的实际情况,选取了5个最能充分反映采空区特征的参数作为评价指标,并基于变异系数法的客观性以及功效系数法的简单高效性,提出一种功效系数法采空区稳定性判别模型,并结合数值分析方法对某矿山7个采空区稳定性进行了判别与对比论证。结果表明:模型的判别结果与数值模拟的结果基本一致,所提出的采空区稳定性判别方法计算简单快速,能较为准确的对采空区的稳定性进行评价,为矿山采空区治理和稳定性评价提供较为科学的依据,判别方法对井下矿山的安全生产具有较好的指导作用。

The goaf left behind after ore mining is always a hidden danger to mine.The stability of goaf is related to mine production safety.In this paper,according to the actual situation of mine,5 parameters which can best reflect the characteristics of goaf were selected as evaluation indexes.Based on the objectivity of the coefficient of variation method and the simple and efficient efficiency of the efficiency coefficient method,a stability discrimination model of the efficiency coefficient method for goaf was proposed,and the stability of 7 goaf in a mine was identified and compared with that of the numerical analysis method.Discriminant result of the calculation results showed that the model and the results of numerical simulation were matched,the proposed goaf stability discriminant method can calculate simply and quickly,and can more accurately evaluate the stability of goaf.This work can provide a scientific basis for mining goaf management and stability evaluation,assessment method of underground mine safety production has good guidance.