TBM and roadheader are two dominating excavation machines in underground tunnelling projects. The performance of these two tunnelling machines has been reviewed and analysed individually by many researchers from multiple points of view. However, there are almost no studies that have made an extensive comparison between these two machines, mostly from financial points of view. The current study is intended to characterize both financial and technical status of these two mechanical tunnelling machines in one of the biggest coal mines in Iran. The main objective of this study is to define the best method and equipment that meets a predefined economic goal, which is mainly to maximize the net present value. To this end, a technical and financial model based on the geomechanical and financial parameters involved in the project has been prepared and the financial part of the project has been carried out by applying COMFAR III financial analysis software. Subsequently, a sensitivity analysis of the model was conducted in order to evaluate the effect of involved parameters on the project. According to the results, a roadheader has better economic justification than a TBM, while the TBM has a better advance rate than the roadheader.

隧道掘进机和掘进机是地下隧道工程中的两种主要挖掘设备。许多研究人员从多个角度分别审查和分析了这两种隧道掘进机的性能。但是，几乎没有研究对这两种机器进行广泛的比较，主要是从财务角度出发。当前的研究旨在描述伊朗最大的煤矿之一中这两台机械隧道掘进机的财务和技术状况。这项研究的主要目的是确定符合预定经济目标的最佳方法和设备，这主要是使净现值最大化。为此，根据项目涉及的地质力学和财务参数，准备了一个技术和财务模型，并通过使用COMFAR III财务分析软件进行了项目的财务部分。随后，对该模型进行了敏感性分析，以评估所涉及参数对项目的影响。根据结果​​，掘进机比掘进机具有更好的经济依据，而掘进机比掘进机具有更高的前进率。