Coal mine underground hydraulic fracturing hole sealing method

摘要: The invention discloses a hole sealing method of coal mine underground hydraulic fracturing hole, which carries out the by using double-capsule device. comprises following steps: (a) drilling to set depth machine in an extraction roadway and recording thickness corresponding rock layer according characteristics layers distributed direction hole; (b) determining length medium connecting pipe between first capsule second device with various preparing pipe; (c) assembling placing into so that is placed bottom plate layers, front end located at intersection layers; (d) pipeline starting pump unit, pouring water for respectively form sections walls. has beneficial effects: no potential safety hazard caused liquid leakage occurs when carried out, efficiency high, effect good, practical range pressure resistance are wide, can realize repeated utilization.