岩体质量的合理评价对矿山的安全生产和经济效益具有重要意义。针对岩体质量评价条件复杂、具有模糊性的特点，选取5个代表性参数作为评价指标，提出了一种基于博弈论G1-EW-TOPSIS法的岩体质量评价模型，并将该模型应用于内蒙古某银多金属矿。为验证该模型的有效性，首先对该矿山首采中段进行现场调查，确定5个测点，然后基于博弈论的思想，将G1法计算的主观权重 ω₁ 和EW法计算的客观权重 ω₂ 优化组合，得到最终的综合权重 ω，最后利用TOPSIS法计算各测点的相对贴近度来判断岩体质量等级。结果表明：该矿山首采中段岩体质量评价等级主要为Ⅲ级和Ⅳ级，岩体质量较差，需要加强支护。计算结果与工程现场5个测点完全吻合，验证了模型的有效性，为岩体质量评价提供了新思路。

The reasonable evaluation of rock quality is the basis for engineering design and construction，and it is of great significance to the safe production and economic benefits of mines.In view of the complex conditions and ambiguity of rock quality evaluation，on the basis of comprehensive reference to relevant research literature，five parameters were selected as rock quality evaluation indexes，including core quality index RQD value（X₁），uniaxial compressive strength of rock σ_c（X₂），rock integrity coefficient K_v（X₃），structural surface strength coefficient J（X₄）and unit time water seepage S（X₅），and a rock quality evaluation model of G1-EW-TOPSIS method based on game theory idea was proposed and applied to the rock quality evaluation of the first mining middle section of a silver polymetallic mine in Inner Mongolia.To verify the validity of the model，firstly，a field survey was conducted to determine five measurement points for the structural surface condition and groundwater flow of the rock mass in the first mining middle section of the mine，and then the subjective weight ω₁ and objective weight ω₂ of the indexes of the measurement points were obtained by combining the G1 method and EW method through game theory to obtain the comprehensive weight ω.Finally，TOPSIS was used to calculate the relative closeness of each measurement point under each rock quality class to determine the rock quality class of the measurement point.The results show that the five rock quality grade evaluation indexes selected in this paper can better reflect the state of the rock mass.The method of calculating the com-prehensive weight of the model not only overcomes the shortcomings of the single assignment method，but also reduces the error and improves the ability of the model to deal with multi-objective decision problems.The rock quality in the first middle section of this mine is mainly evaluated as grade Ⅲ and grade Ⅳ，the rock quality is poor，and the support needs to be strengthened for the roadway and the exposed surrounding rock of the quarry where the rock quality is grade Ⅳ.The calculation results of the model completely match with the rock quality of 5 measurement points at the mine engineering site，which provides a new idea for rock quality evaluation.