Research on law of mining pressure manifestation in thin coal seams of comprehensive mining working face
In response to the severe mining pressure during the backfilling of ultra long comprehensive mining working faces,which are prone to occur accidents such as coal wall caving and roof caving,taking thin coal seam mining of the 454 meter ultra long comprehensive mining face in the Bulianta Coal Mine as research object,based upon on site observations and analysis of support pressure data,the mining pressure manifestation law during the backfilling process of the 454 meter ultra long fully comprehensive mining working face is studied,the pressure manifestation situation during the initial pressure on directly top of the working face,and the pressure manifestation situation and step distance during the initial and periodic pressure of the basic top are summarized which providing a certain reference for mining of similar working faces under similar conditions.
ultra long comprehensive working facethin coal seamlaw of mining pressure manifestation
NETL
NSTL
万方数据
