University chemical laboratory is a high-risk place for teaching and scientific research due to the presence of various physical and chemical hazards. In recent years, university chemical laboratory accidents occur frequently. This urges the need to enhance university chemical lab safety. A semi-quantitative methodology comprising Matter-Element Extension Theory (MEET) implemented with Combination Ordered Weighted Averaging (C-OWA) operator is proposed to assess the risk of a university chemical laboratory. First, an index-based risk assessment system of university chemical laboratory is built by identifying various risk factors from a system perspective. Then, C-OWA operator is used to calculate the weight of assessment indices, whereas MEET is employed to determine the correlation degree of assessment indices. Finally, the comprehensive risk of university chemical laboratories is assessed, and some safety measures are proposed to reduce the risk of university chemical laboratories. The applicability of the proposed methodology is tested using a practical case. It is observed that the methodology can be a useful tool for risk assessment and management of university chemical laboratories.

由于存在各种物理和化学危害，大学化学实验室是教学和科学研究的高风险场所。近年来，大学化学实验室事故频繁发生。因此，迫切需要增强大学化学实验室的安全性。提出了一种包含物元扩展理论（MEET）和组合有序加权平均（C-OWA）运算符的半定量方法，以评估大学化学实验室的风险。首先，通过从系统角度识别各种风险因素，建立了大学化学实验室基于指标的风险评估系统。然后，使用C-OWA运算符来计算评估指标的权重，而使用MEET来确定评估指标的相关度。最后，评估了大学化学实验室的综合风险，并提出了一些安全措施以降低大学化学实验室的风险。所提出的方法的适用性是通过实际案例进行测试的。据观察，该方法可以成为大学化学实验室进行风险评估和管理的有用工具。