Gas geological property in Gaocheng coal mine gliding structural district in western Henan

Geological structure is the master control factor to influence coal and gas outburst.Gliding structures developed widely in western Henan coal field. The mechanism of gliding structure and its control on coal measures,coal seam and gas deposit are researched based on the theory of plate structure and the region tectonic evolvement,collation data systematically about coalfield geological prospecting and plenty of gas geological data that mine disclosed.Gaocheng coal mine located at the western Ludian gliding structure,which is influenced by gliding structural movements two times.The thickness of coal seam changed acutely and the structure coal developed by layer.The roof structure of coal seam can be divided into four failure types,including tensile breccia,fault gouge and breccia,original roof rock,and shear breccia,as well as the gas release and enrichment and the distribution of coal and gas outburst hazard region are controlled by gliding structure.