Research on fully mechanized caving mining technology of pre mining top slicing in shallow hard coal seam
YANG Jun-zhe
Abstract：In order to effectively solve the difficult problem of shallow overburden hard and extra thick coal seam in Shendong mining area,taking the 1-2 coal seam of Shendong Huojitu as the research object,the upper layer fully mechanized mining under layer fully mechanized top coal caving mining technology is adopted for the test.Through numerical simulation,similar material simulation,theoretical analysis and other comprehensive research methods,the influence law of upper layer fully mechanized mining on the under layer top coal cascading is analyzed.The paper puts forward the mechanism that,mining large put small,high-impedance bracket up and down disturbance is favorable for recovery of top coal in under layer fully mechanized top coal caving mining face.Through the application and observation in the mine,the results show that,top coal caving was effectively improved,the top coal behind the stent was full broken,face resource recovery rate achieved 87％,and the pressure appeared to ease in the under layer fully mechanized top coal caving mining face.
Keywords：shallow overburden hard and extra thick coal seamfully mechanized mining on top layer and fully mechanized top coal caving mining under layertop coal caving and drawing characteristicslaw of rock pressureHuojitu Mine
Publication Date：2017-01-01
Pages：9( 1108-1116 )