The working face of 431301 in Liangshuijing Mine was taken as the engineering background, the technology of roof cutting and pressure releasing for gob-side entry retaining was studied. The mechanism of the roof cutting and pressure releasing for gob-side entry retaining and the slitting of D-type energy gathering tube were analyzed. And the key parameters affecting the blasting effect were determined. The field test of different blast hole spacing was carried out. The blasting effect was tested by the drilling peek technique, and the reasonable blasting parameters were finally determined. The blast hole elevation angle was 70°, the vertical roadway was applied, the depth was 11.5m, the sealing length 4 m, and the spacing 600 mm; For the blasting parameters, the charging density was 0.45 kg/m, the continuous charging structure was adopted, and the blasting method was forward series detonation, with certain engineering reference significance.
刘国庆，种德雨. 薄煤层坚硬顶板切顶卸压沿空留巷技术研究[J]. 煤炭与化工, 2019, 42(11): 25-29，33.
Liu Guoqing， Chong Deyu. Technology of gob-side entry retaining by roof cutting and pressure releasing about the hard roof in thin coal seams. CCI, 2019, 42(11): 25-29，33.
