模糊综合评判法在蚀变岩型金矿床岩体质量评价中的应用

Application of Fuzzy Comprehensive Evaluation Method in Rock Mass Quality Evaluation of Altered Rock Type Gold Deposits

对于工程岩体的质量评价,不论是目前常用的Q系统分类法、地质力学RMR分类法还是国标BQ分类法,都存在一定的局限性。为了得到一个更加准确,更贴近真实岩体质量的评价结果,引用模糊综合评判法进行岩体的稳定性评价。以焦家金矿蚀变岩型金矿床为例,对不同蚀变类型的岩性稳定性进行模糊综合评判。结果表明焦家矿区调查区域为-190中段至-330中段之间,除-270以上黄铁绢英岩化花岗岩为Ⅲ类稳定性一般的岩体外,其余蚀变花岗岩的岩体质量均为Ⅳ类较差和Ⅴ类很差的岩体。品位最高的黄铁绢英岩化碎裂岩岩体稳定性最差,在施工到相应岩性的采场时特别要注意做好采场的相关支护工作。

There are certain limitations in the quality evaluation of engineering rock masses,whether it is the current commonly used Q-system classification method,geomechanical RMR classification method,or national standard BQ classification method.In order to obtain a more accurate and realistic evaluation result of rock mass quality,in this article,the fuzzy comprehensive evaluation method is used to evaluate the stability of rock mass.With the Jiaojia altered rock type gold deposit as an example,a fuzzy comprehensive evaluation is conducted on the rock stability of different types of alteration.The results show that the survey area of Jiaojia mining area is between-190 middle section and-330 middle section.Except for the pyrite sericite granite above-270 which is a Class Ⅲ stable rock mass,the rock mass quality of the other altered granite is poor in Class Ⅳ and very poor in Class Ⅴ.The stability of pyrite sericite cataclastic rock with the highest grade is the worst,and special attention should be paid to the relevant support work of the mining site when the mining site of the corresponding rock type is constructed.