A Fine Detection Technology for the Best Extraction Layer in Mining Fissure Zone

High fissure mine drainage is the most direct and most effective method in controlling gas overrun at the working face upper corner, return air roadway. For the problem of incorrect positioning of mining fissure zone, this paper provides detecting device, technological process and detecting project for solving the optimal extraction of high fissure drainage layer. The stability of mining fissure zone and a dynamic mining fissure zone test results verify the reliability of the method.