Taking the No.1 substation chamber in the 2# coal seam of Wanjiazhuang Coal Industry as the background of the project, the damage mechanism of the deep mine chamber and the stability control principle of the strong mining surrounding rock are explored, and the repair and reinforcement plan for the deep strong mining chamber are analyzed. The relevant support technical parameters with the on-site industrial test are optimized. According to the numerical simulation results, the amplitude of the support pressure in front of the coal wall increases rapidly in the near field and decreases slowly in the far field as it moves away from the working face. Due to the superposition of the over-mining stresses on the two wings, the chamber was subjected to severe mining impacts. The main concept of the repair and reinforcement technology for the chamber in the deep, strongly-mined adit is to release and then control - reconstruct and regenerate, which is able to greatly improve the support strength of the deep adit. The maximum deformation of the surrounding rock was 155.8mm during the mining of the two working faces, which significantly improved the support effect and strongly guaranteed the safe and efficient mining of the working faces.