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通过建立运、回风顺槽附近煤层的极限平衡方程准确地计算出卸压区的宽度,然后利用工作面切眼的长度减去卸压区的宽度的方法,进而准确地计算出倾向顺层瓦斯抽采钻孔的孔深,为倾向顺层瓦斯抽采钻孔的瓦斯抽采设计提供科学的依据。结果表明,根据卸压区宽度公式可以有效计算卸压区的宽度来确定钻孔的孔深。
By establishing the limit equilibrium equation of coal seam near the tank and return air, the width of relief zone is calculated accurately, then the length of face cut is subtracted to deduct the width of relief zone, The hole depth of gas drainage borehole provides a scientific basis for gas drainage design that favors vertical gas drainage drilling. The results show that according to the formula of width of relief zone, the width of relief area can be effectively calculated to determine the drilling depth.