瓦斯抽放是消除煤与瓦斯突出、减少采区瓦斯超限、变害为利的重要措施之一。南桐矿务局从1965年开始抽放,经实践摸索、总结出一套在不同条件下,提高抽放效果的方法。如鱼田堡煤矿成功试验了“倾斜和缓倾斜煤层底板钻孔抽放法”和“顶板钻孔法”的经验。东林煤矿试验“急倾斜煤层高仰角钻孔及 Gas drainage is one of the important measures to eliminate the outburst of coal and gas, reduce the overburden of gas in the mining area, and change the damage to benefit. Nantong Mining Bureau began draining from 1965, groping through practice, summed up a set of ways to improve the drainage effect under different conditions. For example, the fish tank Fort Mine successfully tested the “inclined and gently inclined seam floor drainage method” and “roof drilling” experience. Donglin Coal Mine Experiment "Steeply Inclined Coal Seam with High Elevation Angle and