Specific Digging Energy as a Measure of Diggability

1994-10-15
Performance monitoring of shovels is the common practice for diggability estimation. In this paper, the specific digging energy is proposed for the classification of diggability of rock units as a result of performance monitoring studies. An extensive field research program based on the determination of some rock mass and material properties and the performance monitoring of different type and size of electrical shovels has been undertaken at TKI`s (Turkish Coal Enterprises) surface coal mines. The result of performance monitoring of electrical shovels are evaluated considering the ease of digging and formation characteristics. Among various performance parameters, the specific energy is determined as the most relevant diggability parameter. A diggability classification system supported by 80 different case studies is proposed for electrical shovels; it is based on the specific digging energy. Specific digging energy is also very closely related to rock mass and material properties. Good correlations have been established between specific digging energy and rock mass/material properties, such as seismic velocity, penetration rate, uniaxial compressive strength and tensile strength.
3rd International Symposium on Mine Planning and Equipment Selection (18 - 20 Ekim 1994)

Suggestions

Inverse design of compressor cascades on parallel computers
Özhamam, M.; Eyi, Sinan (2002-01-01)
In this paper, the performance improvements of an inverse compressor cascade design are investigated. A Navier-Stokes code is used for flow analysis. A least-square optimization method is used to minimize pressure discrepancies between initial and target cascades. In optimization process, most of the CPU time is associated with the sensitivity analyses. Sensitivities are evaluated on parallel computers by using a finite difference approach. Results show that, analyzing sensitivities on parallel computers re...
Contextual Information Requirements of Cost Estimators from Past Construction Projects
Kiziltas, Semiha; Akinci, Burcu (American Society of Civil Engineers (ASCE), 2009-09-01)
Past project data sources provide key information for construction cost estimators. Previous research studies show that relying only on one's own experience during estimation results in estimators' bias. Having and referring to historical databases, containing objective information on what happened in past projects, are essential for reducing estimators' biases. The first step toward development of useful project history databases is to understand what information estimators require from past projects. The ...
Evaluation of reference modeling for building performance assessment
Gürsel Dino, İpek (2014-04-15)
Lifecycle building performance assessment (LBPA) practices are being increasingly applied on existing buildings to ensure that performance requirements are fulfilled during building service-life. LBPA is a multi-disciplinary and information-intense process that requires computational tools for information management and decision support. We have previously developed a computational reference model (CLIP-Core) that supports various component-based LBPA practices. When CLIP-Core is considered to be used, it n...
Hybrid particle swarm optimization algorithm for obtaining pareto front of discrete time cost trade-off problem
Aminbakhsh, Saman; Sönmez, Rifat; Department of Civil Engineering (2013)
In pursuance of decreasing costs, both the client and the contractor would strive to speed up the construction project. However, accelerating the project schedule will impose additional cost and might be profitable up to a certain limit. Paramount for construction management, analyses of this trade-off between duration and cost is hailed as the time-cost trade-off (TCT) optimization. Inadequacies of existing commercial software packages for such analyses tied with eminence of discretization, motivated devel...
An Investigation on the Influence of Depth of Cut and Blasting on Shovel Digging Performance
Karpuz, Celal; Pasamehmetoğlu, A.gunhan (1992-06-01)
This paper describes the results of performance monitoring of electrical shovels in terms of depth of cut and blast performance on diggability. A field research programme has been undertaken at four different rock units of surface coal mines, namely Yatağan fresh and weathered marl, Tinaz marl and conglomerate. A performance monitoring system has been developed and utilized for different type and size of power shovels. Three different depth of classes (< 0·4, 04–0·6, 0·6–0·8 meters for unblasted cases) are ...
Citation Formats
C. Karpuz, “Specific Digging Energy as a Measure of Diggability,” presented at the 3rd International Symposium on Mine Planning and Equipment Selection (18 - 20 Ekim 1994), İstanbul, Türkiye, 1994, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/72219.