Application of High-Pressure Hydraulic Slotted Extraction Technology in Gas Control and Analysis of Outburst Control Effect
In response to the problem of high gas pressure and poor coal seam permeability in deep mining of coal mines,high-pressure hydraulic cutting technology is proposed to prevent coal and gas outbursts.By analyzing the influence of different extraction negative pressures and drilling spacing on the range of outburst suppression,the optimal extraction negative pressure is-30 kPa,and the drilling spacing is less than or equal to 8 m.Based on this,the application effect of outburst suppression is analyzed from the residual gas pressure and content.Research has found that when the spacing between the cut holes is 7 m,it can meet the requirements for preventing outbursts,and after cutting,the extraction spacing is greatly extended,reducing the amount of construction work required for extraction and lowering economic investment.
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