Factors controlling the accumulation research of CBM enrichment of No.16 coal seam in the Shaopu coal mining of Zhina coalfield on the west of Guizhou Province

The control of geological conditions on the coalbed methane(CBM)accumulation of No.16 coal seam in the Shaopu coal mining was discussed from four aspects:structure,coal seam thickness,burial depth of coal seam,and hydrogeologic condition.The following conclusions are drawn:the distribution of gas content in the present coal seam shows that the gas is controlled by folds,but gas is different in different fold positions due to different dev;it is very obvious that CBM content is influenced by thickness and the buried depth of coal seams,the coal seam and gas content,buried depth and gas content both shows certain positive correlation;meanwhile,the mining area groundwater condition of coalbed methane also has good sealing effect.Through the analysis of the geological factors configuration that:the central block of mining geological structure and development,coal thickness,buried depth,underground hydrodynamic weak enrichment to coalbed methane.