Leading deep hole pre-splitting roof gob-side entry retaining method

The invention relates to the field of underground mining of coal mines and particularly relates to a leading deep hole pre-splitting roof gob-side entry retaining method. The method disclosed by the invention comprises the following steps: drilling on an upper roof along a roof pre-splitting line in a roadway in front of a coal face, filling shaped charge at the upper part of the drill hole in a certain range, not filling the charge at the lower part of the drill hole in a certain range, tamping with stemming, detonating before a leading pressure of the face, blasting and pre-splitting rock stratum at a charged part at the upper part of the drill hole, wherein the lower rock stratum is kept complete, and construction space safety is ensured. Quick-hardening and high-strength concrete roadway supporting walls are built after face pushing by adopting a technology for filling pump concrete in a mold bag, non-split lower roadway roof is cut off by the roadway supporting walls under the action of a roof pressure,