Study Of The Law And The Control Factor Of Gas In Shandong Province

Based on the principle of coal geology, coal geology and Mining gas-geology, analysised with the method of structure progressive control, pressed coal Geologically Active with gas bearing and Gas migration, on the basis of collect and clear up the information of geologic information, drillcore and log presentation, analysised the governing factor and regionalism,Zones the Gas occurrence of coal-bearing region in shandong province.Research shows that Permo-carboniferous period is the main coal bearing formation in Shandong, Cenozoic coal series in Jerudong, Fangzi Fm of Mesozoic is the main coal-bearing strata in weifang, Yishui territory. Base on the differents of component of coal, geologic(al) structure, The lithology of floor and binching of coal bed,the degree of intrusion of magma, hydrogeologic condition,the gas occurrence different regularity. Analysis shows that structure controls the gas of Shandong,the gas diminishes as a function of distance, the thickness Of the basement controls the gas in the block divided by fault. Discovered by the assay of sampling shows that Shandong province appears low gas in most area and unusual gas gush phenomenon in parts of an area. high gas appears in zhaoguan of huanghebei,tangkou in jining,sanhekou in tengnan,kunsheng in zibo and tanchengantai in linyi. Analysis shows that the the thickness Of the basement and the degree of intrusion of magma influenced the unusual high gas zone. Sanhekou, kunsheng, and tanchengantai mainly controlled by magmatic intrusion.The unuaual in Zhaoguan colliery mainly controlled by the thicknessOf the basement, magmatic intrusion with the argillite of the roof and the intrusion of magma.Bigger thickness of the basement is the main reason of high gas in the north of tangkou colliery, mudstone roof and secondary fault also play an important part in the area.Low mine gas in luxi with high mine gas in local area, low mine gas in luzhong with high mine gas point and low mine gas in ludong three part were divided by synthesis. Analysis Analysis shows that Zhaoguan colliery and Jiyang depression have the condition of gas stock number.