Uncovering rock burst coal seam in crosscut has the characters of large strength, large density, and it would be seriously threaten for mine safety production.In order to realize safety and efficiently of uncovering rock burst coal seam, during drill gas predrainage holes of C7+8 rock burst coal seam of bottom crosscut in one mining area of one shaft of Bailongshan coal mine, hydraulic slotting and effusion technology was applied in some bores, coal seam permeability was improved obviously, and gas pre-drainage effect was improved, gas pressure and content was decreased, uncovering coal in crosscut time was also decreased, then safety and high efficient uncover coal seam was realized.The test showed that after hydraulic slotting and permeability, an average drainage density of single hole arrived 24.7％, the maximal was 78.6％, it was 8.2 times for normal technology, the maximal gas drainage amount was about 1713.6m3, it was 6 times for normal technology, pre-drainage time of uncovering coal in crosscut advanced about 60％ with hydraulic slotting and permeability technology.%石门揭穿突出煤层具有突出强度大、密度大、对矿井安全生产造成严重威胁的特点,为保证安全高效地实现石门揭穿突出煤层,通过在白龙山煤矿一井一采区下部车场石门揭C7+8突出煤层施工瓦斯预抽钻孔期间,对部分钻孔采取水力割缝增透技术措施,大大提高煤层透气性,在提高抽采效果的同时降低煤层瓦斯压力和瓦斯含量、缩短石门揭煤工期,实现安全高效揭煤的目的.试验结果表明:采取水力割缝增透措施后,单孔平均抽采浓度24.7％,最高78.6％,较普通工艺钻孔提高8.2倍;日抽采瓦斯纯量最高1713.6m3,较普通工艺钻孔提高6倍;采用水力割缝增透工艺的石门揭煤区域预抽时间提前60％.
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