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Study on combined pressure relief technology of blasting pre-splitting and large-diameter boreholes for hard roofs in extra-thick coal seams 

闫寿庆, 李青海, 张金良, 王国徽, 邢 侠, 侯 雷, 王绪奎, 马小勇
Coal Engineering . 2026, (5): 141 -150 .  DOI: 10.11799/ce202605018