Discussion and Optimization on Drainage Radius Measuring Method of Borehole
Abstract：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.
Keywords：advance gas drainage boreholedrainage radiusflow methoddrilling cutting methodblank zone
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)