In order to solve the measured results not accurate occurred due to the method selection and operation as well as other causes during the drainage radius measuring process,which cause the blank zone problem occurred,with several experiments,the flow method and the drilling cuttings method combined method was applied to for the measurement.With the comprehensive analysis and correction conducted on the two measured results,then based on the sensitive degree of the predicted index,the measurements were applied to comprehensively determine the result intervals.The practices showed that the measured results of 1.5 m≤R≤1.8 m for the drainage radius R were accurate and reliable.During the implementation process,the drainage borehole measures could be effective to eliminate the blank zone occurred.%为了解决瓦斯排放孔半径测定过程中由于方法选择和操作等原因而出现的测定结果不够准确,以及由此而导致的空白带出现问题,通过多次试验,采用流量法和钻屑法测定相结合的方法,通过对2种测定结果进行综合分析、修正,再根据测定所依据预测指标的敏感程度综合确定出排放半径R的测定结果1.5 m≤R≤1.8 m,经实践证明是准确和可靠的,排放钻孔措施在实施过程中有效地避免了空白带的出现。
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