## dimensionless parameterin mining

### An important dimensionless parameter in certain types of fluid

Solved: An important dimensionless parameter in certain types of fluid flow problem is the Froude number defined as $V / \sqrt{g \ell}$ , where V is a...

### Ventilation friction factor determination and comparison

Friction factor is a crucial parameter in assessing and modelling ventilation systems in underground In this paper we determine the friction factors for two underground mines using continuous mining is coefficient of friction (dimensionless)....

### DIMENSIONAL ANALYSIS AND MODELING

Each term in a nondimensional equation is dimensionless. In the process of The Froude number also appears as a nondimensional parameter in free- surface flows (Chap mine how fast the engineers should run the wind tunnel to achieve...

### Controlled Roof Collapse during Secondary Mining in Coal

Secondary mining involves revisiting a mine and extracting coal from the pillars. The beam number was the only dimensionless parameter in the problem....

### What is the Reynolds Number? Numerics Background

The dimensionless Reynolds number plays a prominent role in foreseeing the patterns in a fluid's behavior. It is one of the main controlling parameters in all viscous flows where a Examples include water, alcohol and mineral oil....

### dimensionless niyama criterion: Topics by WorldWideScience

Prediction of Hot Tearing Using a Dimensionless Niyama Criterion In the past years, many signal processing and data mining based methods were are also similar in their dimensional parameters (in particular, the plasma minor radius a...

### The importance of testing method to evaluate the most

31 Dec 2018 One of the most fundamental parameters in rock mechanics is critical are different because of different dimensionless stress intensity factor values. Correspondence: Nazife Erarslan, Department of mining and mineral...

### Similitude,

r develop a set of dimensionless variables for a given flow situation. mining the corresponding value of D LpalpV2. sionless parameter in fluid mechanics....

### 9. Model Sensitivity and Uncertainty Analysis

sufficient to calibrate model parameters in ways that would enable us to reliably A dimensionless expression of sensitivity is the elasticity index, EIPQ, which mine from the Monte Carlo simulation which parameter errors are important....

### Estimation of wall roughness functions acceptability in CFD

comparison with classical approach for wall roughness modeling in mine ventilation networks well-correlated with the nondimensional roughness height. K+. S It should be emphasized that KS parameter in (26) is undefined for α > 0.0003....

### the diffusion of innovation in the mining industry

Table 4.2 Default Parameters in the Simulation. Parameters. Value Units comp-threshold. 0.5 unitless depth-increase. 10 feet max-payback for small mines...

### (PDF) Dimensionless solution of the equation describing the

12 Sep 2020 PDF | A dimensionless solution is presented for the surface recombination component τ s of the effective lifetime τ eff of the fundamental mode...

### FULLTEXT01.pdf

A number of parameters in the prediction equations are determined by curve fitting to mining, cautious blasting leads to improved safety from better functioning This means that the minimum number of dimensionless groups to describe the....

### The emissions of gases from abandoned mines: role

20 Mar 2014 abandoned mine workings but gas flow is enabled. For the second, there are drop losses, dimensionless number; l = borehole length (m); parameter; in the other case (when the abandoned mines are defined as a closed...

### PRINCIPLES OF ENGINEERING GEOLOGY

rocks comprising a dominant clay mineral control. 289. 5.12 Intrinsic 7.15 Mining subsidence. 534 Dimensionless parameter in limit equilibrium analysis on...

### Rib Stability

ABSTRACT. The U.S. Bureau of Mines examined previous research on rib stability in an effort to develop a Limiting the number of parameters in the model is one technique that searchers in England have applied dimensionless analysis....

### Behavior of universal critical parameters in the QCD phase

2 SUBATECH, UMR 6457, Université de Nantes, École des Mines de Nantes, IN2P3/CNRS. 4 The parameters ˜λ3 and ˜λ4 are found to be dimensionless and....

### Self

Early work was carried out on shale rock ignition 1982, when the US Mining c where δc is the critical value of the dimensionless parameter in Eq. (2), and is...

### On dimensionless numbers

5 May 2012 Keywords: Dimensionless numbers; Dimensional analysis; Scaling of equations; Scaling of Typically, they are inorganic substances (salts of mineral acids, serve as the expansion parameter in building approximate....

### 1 Development of River Water Quality Indices

The WQI transforms selected water quality parameters into a dimensionless number so that changes parameters in the final index calculation is also not specified. This method aims to mine view or opinion from experts without having the...

### Prediction of tidal excursion length in estuaries due to the

To achieve this purpose, the magnitudes of dimensionless parameters in Eq. 31, An overview of the impact of mining and mineral processing operations on...

### dimensional analysis and modeling

of dimensional variables, nondimensional variables, and dimensional con- stants into The Froude number also appears as a nondimensional parameter in free- mine how fast the engineers should run the wind tunnel to achieve similarity...

25 Sep 2014 Hence, a dimensionless term the drag coefficient C D has been defined as to calculate the unknown parameter. In a later publication by Heywood (1962 Transactions of the American Institute of Mining Engineers , 17 , pp....

### particle percolation in block caving mines

12 Dec 2011 dimensionless percolation rate (DPR) relation was derived using the method of Bridgwater et al. (1978) 2.5 PERCOLATION OF FINE PARTICLES IN BLOCK CAVING MINES . 40 the key parameter in the percolation study....

### association rule learning Archives | DIMENSIONLESS

19 Nov 2018 Data mining uses artificial intelligence techniques, neural networks, the relationship between your age and salary parameter. In the following...

### Evaluating the Impaction of Coal Mining on Ordovician Karst

10 Oct 2018 in the Heilongdong spring area due to long-term coal mining. In this study, five and mutation sequence of the time series of environmental hydrological parameters in the study area. the wavelet (dimensionless). Yellow...