Planning for Reliable Coal Quality Delivery Considering Geological Variability: A Case Study in Polish Lignite Mining

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td align="left">Variogram model</td><td align="center">Dimension and unit</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td align="left">Nugget effect</td><td align="center">160 000 (kJ/kg)<sup>2</sup></td></tr><tr><td align="left">Spherical model</td><td align="center">235 000 (kJ/kg)<sup>2</sup></td></tr><tr><td align="left">Autocorrelation range</td><td align="center">900 m</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Basic features of variogram model of calorific value.

Journal of Quality and Reliability Engineering

tab1

Table 1

Table 1: Planning for Reliable Coal Quality Delivery Considering Geological Variability: A Case Study in Polish Lignite Mining 