At present, with the increase of production capacity and the promotion of production, the reserves
of most mining enterprises under the original industrial indexes are rapidly consumed, and the full
use of low-grade resources is getting more and more attention. If mining enterprises want to make
full use of low-grade resources simultaneously and obtain good economic benefits to strengthening
the analysis and management of costs is necessary. For metal underground mines, with the gradual
implementation of exploration and mining projects, capital investment and labor consumption are
dynamic and increase cumulatively in stages. Consequently, in the evaluation of ore value, we should
proceed from a series of processes such as: exploration, mining, processing and the smelting of
geological resources, and then study the resources increment in different stages of production and the
processing. To achieve a phased assessment of the ore value and fine evaluation of the cost, based on
the value chain theory and referring to the modeling method of computer integrated manufacturing
open system architecture (CIMOSA), the analysis framework of gold mining enterprise value chain is
established based on the value chain theory from the three dimensions of value-added activities, value
subjects and value carriers. A value chain model using ore flow as the carrying body is built based on
Petri nets. With the CPN Tools emulation tool, the cycle simulation of the model is carry out by the
colored Petri nets, which contain a hierarchical structure. Taking a large-scale gold mining enterprise
as an example, the value chain model is quantified to simulate the ore value formation, flow, transmission
and implementation process. By analyzing the results of the simulation, the ore value at different
production stages is evaluated dynamically, and the cost is similarly analyzed in stages, which can improve mining enterprise cost management, promote the application of computer modeling and
simulation technology in mine engineering, more accurately evaluate the economic feasibility of ore
utilization, and provide the basis for the value evaluation and effective utilization of low-grade ores.