Mining Key Technology with 6.2 m High Cutting Height in High Gassy Mine
Abstract：With the research and development of the high cutting hydraulic powered support,a pass cutting height of a coal mining face over 6 m could the made by a coal shearer.A cubic gas drainage mode with the surface and underground boreholes,a ventilation mode of a high gassy coal mining face with three fresh air ways and two air returning ways and a large section seam gateway rapid driving and support technique was developed.Thus a completed set of 6.2 m thick seam one pass full cutting technology and technique was formed and a safety and high efficient mining was realized under the high gassy and thick seam conditions.The highest day production of the coal mining face reached at 35 000 t,the annual production of the coal mining face was over 7 million t and the advancing rate of the gateway driving reached 1 800 m per month.All those provided the references to the high efficient mining in thick seam.
Keywords：high gasthick seamlarge cutting heightgas drainageone pass full seam cutting
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)