Sentence examples for mining of thick from inspiring English sources

Highwall mining of thick, steeply dipping coal requires careful planning and execution, including close cooperation between geotechnical design engineers, the mining company, and the highwall mining contractor.

Based on break characteristics of roofs in fully mechanized top-coal mining of thick shallow coal seams, a fracture mechanics model was built, and the criterion of crack propagation in the main roof was derived using the fracture mechanics theory.

Highwall stability can be maintained, and highwall mining production optimized by applying design criteria in creative ways, including alternating miner penetration depths and initiating mining of thick seams toward the bottom of the seam.

Highwall mining of thick (up to 30.48 m) steeply dipping (20° or more) coal seams provides many challenges, both geotechnically and operationally, as seam dips near or in excess of highwall mining machine capabilities are encountered.

Based on the conditions of the Huainan coal mining area in China, by combining physical simulation, theoretical analysis and experimental data, the subsidence mechanism induced by underground mining of thick unconsolidated soil layer was studied, and a prediction model for this condition was established (Zhou et al. 2014).

It has been successfully applied in high-methane, spontaneously inflammable thick seams; thick seams with large dip angles; unconsolidated and unstable thick seams; complex structure seams; and 4 5 m thick seams, as well as the residual mining of thick seams.

Open image in new window Fig. 10 Schematic diagram of the stress-relief area in upward relieving mining of hard thick strata.

With a cutting rate of 70 80 min per cut and 14 cuts per day, a recovery efficiency of 506 t/power and an annual output of 8.2 million tons were obtained, and this working face was an example of safe and efficient mining of medium-thick seams and represented the best domestic capability of FMM of medium-thick seams.

These technologies provide safety guarantee for the high efficient mining of extra-thick coal seam of permo-carboniferous in Tashan coal mine.

The mining industry is the most hazardous one and mining operations becoming gradually more and more difficult day by day with the increasing depth of mining and winning of thick as well as complex deposits in more adverse geo-mining conditions.

On-site experiment proves that the periodic weighting step interval of the caving face is 15 16 m, which is basically consistent with the theoretical analysis results, and indicates that the mechanized caving hydraulic support is capable of meeting the support requirements in the mining of a super-thick but shallowly buried coal seam.