Sentence examples for draining gas from inspiring English sources

The process of simultaneously exploiting coal and draining gas was found to be safe, efficient, and green.

A system for draining gas and mining the protective seam in the rock stratum is designed and implemented based on the geological conditions.

The experimental study was designed to reduce the cost of gas control by efficiently draining gas from the upper protected layer.

By selectively supplying and draining gas from gas reservoirs to the converter׳s gas cavities, separate reservoirs inside the piston can be maintained below and above the engine mean pressure.

To improve the efficiency of drilling boreholes and draining gas in a soft coal seam, we propose a drilling technology of protecting the borehole by spraying foam concrete slurry onto the surface of borehole wall during drilling in a soft coal seam.

The geostatic stress, coal mine gas and disturbances produced by external loading can undermine the stability of a borehole and cause the borehole to collapse in a soft coal seam, which results in a poor efficiency of drilling long boreholes and draining gas in a soft coal seam.

It thus greatly restrains the space for drilling holes designed to drain gas.

Third, large-diameter horizontal boreholes could be drilled from the roadway to the gas-enrichment zone above the gob roof to drain gas from the gob area and control gas in the upper corner of the working face.

The characteristics of pore structures of low rank coal and the controlling mechanism of gas desorption from the coal have also been studied to find ways to efficiently drain gas in the coal.

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.

After the connection, a 2BEC80 gas drainage pump was used to drain the gas, the gas concentrations were maintained between 1.5 % and 2.2 % in the high drainage roadway, between 0.2 % and 0.3 % at the upper corner of working face, between 0.2 % and 0.3 % at the tail of the rear scraper conveyor, and between 0.15 % and 0.25 % in the return air.