Sentence examples for for the working face from inspiring English sources

The installed capacity for the working face is 10 Mtpa.

Open image in new window Fig. 71 Combined trial operation on the surface of complete equipment for the working face.

The tonnage of hydraulic support for the working face in thick and ultra-thick coal seam is very large.

After the first-mined seam and adjacent seam are determined, the equivalent relative interlayer spacing (Liu et al. 2010b) can be calculated according to the occurrence of the coal strata, mining parameters for the working face, and interlayer lithology coefficient.

In order to verify the correctness of the air volume by the new method, the Ansys model of ventilation cooling for the working face is established, and the effect of cooling under the air volume is simulated.

Open image in new window Fig. 2 Structure of ZF15000/28/52 top coal caving support   (2) Development of the MG750/1915-GWD shearer, the DSJ140/350/3 × 500 entry belt conveyor with large capacity and long distance, the SGZ1200/2 × 1,000 rear scraper conveyor, a 55 t support carrier, and key equipment for the working face power supply.

Other key technologies include the development of materials capable of withstanding high loading for the packing walls, a modular shield for constructing the packing walls, and pre-fracturing of the working face roof for de-stressing.

The functions are: (1) to serve as an air return path for Y-type ventilation from the working face; (2) to provide stations from which to drill cross-measure boreholes to extract stress relief gas from the 13-1 coal seam; and (3) to allow large-diameter horizontal boreholes to be drilled to the gas-enrichment zone above the gob roof to drain gas from the gob area and to control upper corner gas.

First, to improve the drainage from cross-measure boreholes, the roof roadway acted as an air return pathway for Y-type ventilation air from the working face.

The support selected was suitable for the roof conditions in the working face.

This design is similar to case 2 with the short push and long pull tubing design except that the long pull tubing was made to curve for an additional 12 m into the working face area of the dead-end.