The Optimization of Borehole for Outburst Prevention in Rock Cross-cut Coal Uncovering Area

Taking the design of borehole for outburst prevention in rock cross-cut uncovering area in Qingdong Coal Mine as the engineering background,the influence of drilling design method on engineering quantity of borehole was analyzed through engineering calculation.On this basis,an optimization method to determine the spacing at the bottom of the borehole based on the extraction radius was presented.This paper mainly introduced the optimized design scheme of the parameters of rock cross-cut uncovering under the condition of large and small dip angle of coal seam.The results of engineering practice show that,under the condition of ensuring the extraction effect,the optimized borehole for outburst prevention in rock cross-cut uncovering is 51.2% lower than that of the conventional design,it can greatly reduce the cost of drilling and complete the process of coal uncovering more economically and efficiently.