Application of Cross Layer Drilling Combined with Directional Long Drilling Gas Extraction Technology in Panchengling Coal Mine
Taking 150106 transportation channel of Panchengling Coal Mine as the research background,in response to the low gas extraction efficiency and the imbalance between mining and tunnelling constraints on coal mine production caused by the previously implemented single layered directional long drilling pre-extraction measures for coal seam gas in the strip coal seam,the collaborative directional long drilling technology of high extraction roadway downward through the layer to pre-extract coal seam gas in the strip coal seam was proposed and applied,a three-dimensional cross gas extraction mode combining"long extraction+short extraction"was formed.After experimental verification,the gas extraction effect is significantly improved,which can ensure safe and efficient mining in the mine.At the same time,it also provides technical reference for gas extraction and outburst prevention in other high gas mines or gas outburst mines.
gas extractioncross layer drillingdirectional drillingregional outburst prevention
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