Association Analysis of Coal and Gas Outburst and Nappe Structure in the Southern Margin of North China Coal Accumulation Zone

The paper analyzes the dynamic mechanism and structure features of thrust nappe structure in Southern margin of North China coal accumulation zone,and explores the influence or control of the nappe structure on coal structure,tectonic stress and gas content in the study area.It is considered that the nappe structure has control effect on the development and distribution of the regional tectonic coal.The structural characteristic of the region is mainly the piezotropy under thrust nappe structure and compression and scissor fault.Nappe structure is conducive to the preservation of gas,and the scope of high-outburst mine has the law of distributing along the nappe tectonic belt,which reveals a close contact of the nappe structure and coal and gas outburst disasters.