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General Application of the Critical Path Method to Resource Characterization and Planning for Underground Coal Mining. Final Technical Report

机译：关键路径法在煤矿井下资源特征规划中的应用。最终技术报告

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The decision to open an underground coal mine marks the beginning of a complex and costly operation. This report presents the results of the application of the critical path method (CPM) to the total mine planning process. The extensive scope of the process coupled with the complexity of the calculations involved made the use of some form of automation a necessity. Therefore, initial task efforts centered on a search for a satisfactory computer system to enable the handling of the project in a timely fashion. A commercially available CPM software package called SPRED (Solution of the PREcedence Diagram) was chosen. A key prerequisite to the application of CPM was the identification of all of the activities involved in the mine planning process and the determination of all of the interrelationships that exist between them. Results of this work were reproduced graphically in the form of a network diagram. This format depicted all of the activities as labeled boxes in their proper logical sequence of events. Interdependencies were shown by lines connecting the related activities. On its own merit, the network diagram was a valuable tool in conveying a project overview and showing the complexity of the mine planning process. In order to apply CPM techniques to the information generated, each activity was weighted within the context of the entire development project. To accomplish this, an expected duration for completion of each activity was assigned. All of the information necessary for the application of critical path scheduling techniques was produced at this point and the data prepared in the format suitable for input to the SPRED system. SPRED performed all of the critical path calculations and produced appropriate scheduling information. Analysis of the results shows that critical path techniques have definite applicability in mine planning. (ERA citation 05:025241)

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