Sentence examples for mining depth and from inspiring English sources
Based on the mining depth and thickness of the coal seam, roadway support technology solutions with different buried depth and thickness of coal seam are proposed.
As mining depth and intensity increase, mining geology and technical conditions are becoming increasingly complicated.
Some countries closed all or part of the underground coal mines, due to their great mining depth and high costs.
Owning to differences of the geological structure, mining depth, and surrounding rock properties, a variety of roadway-controlling technologies have been proposed.
When the mining depth reaches 700 to 1,200 m, the temperature increases with the mining depth, and keeps increasing with a non-linearly trend.
With the increase of mining depth and intensity, rockburst has become a common safety problem for underground coal mines (Dou and He 2001; Brady and Brown 2004).
In general, the stresses also increase with mine depth and backfill stiffness, while these tend to decrease with an increase in the surrounding rock mass stiffness.
In recent years, with mining depth increasing and the implementation of more complex and fully-mechanized caving mining processes, the methane emission problem in goafs has become increasingly serious because of the substantial fracturing of rock strata that develops around stopes.
In this paper, a gas-solid coupling theoretical model under the influence of ground stress, gas pressure, and mining depth is established and simulated by using COMSOL Multiphysics software.
With coal production and mining depth increasing, gas leak prevention and control in gassy coal seams with low permeability and high occurrence of outbursts have become extremely important and high-cost issues (He et al. 2005; Zhou et al. 2005; Yuan 2008).
We analyzed the stability of the retained gob-side entry in four different Chinese coal mining sites and evaluated the influencing factors of roadway deformation such as mining depth, support strength and area of gob-side hanging roof.
