With mining depth deepening, deep mechanized caving mining face appeared with mine pressure behavior intensifies, increased risk of rock burst, gas pressure increasing,  coal and gas outburst serious problems. The 7449 fully mechanized caving retracement of the craft face was introduced, the face with deep pressure, retracement channel anchor beam roof support, using network cable tie beam and monomer combination support, which ensured that equipment retracement of the space under the premise of increasing the roof support required. The technology achieved a quick retracement of the safety equipment on the other deep mine caving retracement and had a certain significance for other mechanized mining face.