The Resources Characteristics Of The Coalbed Methane Of Jiao Ping Mining Area

Based of the coal geological exploration conditions of JiaoPing mining area, coal mine production situation and related studies of geology, gas geological data, I used the theory of structural geology, coalbed gas occurrence control theory, structural theory of controlling gas and coalbed methane geology comprehensive theory, and analyzed the development characteristics of geological structure and occurrence and distribution characteristics of coalbed methane with the methods of qualitative and quantitative method, multiple linear stepwise regression method,and summarized the resources characteristics of the coalbed methane in the study area.To obtain the following new understandings:(1)The Fracture structure is not very developmental in the researth area,but a series of north east and north west to the two-way mixed rolling fold structure. Minable seam 4-2 seam is stable, thickness, buried depth is light to medium. The roof and floor rocks of the coal seam are relatively dense,reservoir pressure is small,hydrogeological conditions are simple, thus formed the favorable geological conditions of coal-bed methane occurrence;(2)The study area in addition to the local area with CH4 belt,most of the area belong to N2-CH4 belt,there are all gas mine in this area.the absolute gas emission reduces from south to north,the general form is ordinary pouring Wells or concentration,have no risk of coal and gas outburst;(3)From coal seam characteristics, structural features, coal seam buried characteristics and hydrogeological characteristics of four aspects analyzes the influence factors of the distribution of coalbed methane,considered the above factors on the distribution of coalbed methane in the study area has a different degree of influence. But the fold structure control the distribution and occurrence of the coalbed methane. The seam of the synclinal area is thick and buried deep,so it is conducive to the occurrence of the coalbed methane,the anticline area is just the opposite.;(4)CBM distribution is from the construction of the main role. The stepwise regression analysis show:gas content have a significant relationship with “street sandstone”thickness,oil strength and sand-shale ratio;(5)The coalbed methane geological reserves is 9.84×l09m3,the average resource abundance is 0.3× l08m3/km2,the can extracted gas area is 2.03km2,the main working bed of coalbed methane resources has reached to 9.4 ×107 m3,the can extracted gas resources has reached to 6.58×107m3.The coalbed methane recoures is rich in the research area,and has a great resource advantage to develop and use.