融合权重和模糊综合在爆破方案优选中的应用

Application of integrated weight and fuzzy synthesis in blasting scheme optimum selection

在采用常规台阶爆破参数的条件下,根据双利铁矿二号矿台阶爆破方案所具有的少数据、贫信息、不确定性系统等特征,建立4组爆破方案。运用模糊综合评价理论,并结合理想点法融合改进群组G1法和熵权法求出的主客观权重,减少了单一主观性对决策的影响,从而对4组爆破方案进行综合评判并得出决策。同时采用非线性动力分析软件ANSYS/DYNA数值仿真模拟决策后方案模型,分析台阶炮孔孔内间隔起爆等距单元的应力值能否达到岩石屈服强度,并进行了现场工业试验验证。实际工况结果表明:模糊综合评价法科学有效,能在一定程度上指导爆破优选,爆破后底板平整,无明显根底,满足采装设备的采掘要求,在双利铁矿具有可行性。

Under the condition of using conventional step blasting parameters,according to the characteristics of less data,poor information and uncertainty system of the double blast mine No.2 mine step blasting scheme,four sets of blasting schemes are established.The objective and subjective weights obtained by the method of group G1 and the method of entropy weight are fused by the method of fuzzy comprehensive evaluation and the ideal point method.Reducing the impact of single subjectivity on decisionmaking,the four groups of blasting schemes are comprehensively judged and the decision is made.At the same time,the nonlinear dynamic analysis software ANSYS/DYNA is used to simulate the post-decision scheme model.The stress value of the interval detonation equidistant unit in the stepped hole is analyzed to determine the rock yield strength,and the field industrial test is carried out.The actual working conditions show that the gray analysis method is scientific and effective,and can guide the blasting optimization to a certain extent.After the blasting,the bottom plate is leveled without obvious roots and meets the mining requirements of the mining equipment.It is feasible in Shuangli iron mine.