CAJ | 학술논문

为研究瓦斯矿井本煤层准确测定瓦斯有效抽采半径问题，提出了利用吨煤瓦斯抽采量计算钻孔瓦斯有效抽采半径的测定方法。基于瓦斯钻孔衰减负指数规律建立钻孔瓦斯抽采模型，解算出吨煤瓦斯抽采量，并与其煤层原始瓦斯含量对比，得出煤层残存瓦斯含量Wc和抽采率η，以此判断钻孔瓦斯有效抽采半径，只有同时满足{Wc≤8m3/t∩η≥30%}，才为钻孔瓦斯有效抽采半径。研究结果表明：随着预抽时间延长，钻孔瓦斯有效抽采半径逐渐增大，直至极限抽采半径。通过工程实践，分析了不同时间的有效抽采半径，为瓦斯矿井抽采工作提供了可靠的抽采参数，具有实际应用价值。
위연구와사광정본매층준학측정와사유효추채반경문제，제출료이용둔매와사추채량계산찬공와사유효추채반경적측정방법。기우와사찬공쇠감부지수규률건립찬공와사추채모형，해산출둔매와사추채량，병여기매층원시와사함량대비，득출매층잔존와사함량Wc화추채솔η，이차판단찬공와사유효추채반경，지유동시만족{Wc≤8m3/t∩η≥30%}，재위찬공와사유효추채반경。연구결과표명：수착예추시간연장，찬공와사유효추채반경축점증대，직지겁한추채반경。통과공정실천，분석료불동시간적유효추채반경，위와사광정추채공작제공료가고적추채삼수，구유실제응용개치。
In order to measure the effective drainage radius of mining-coal bed accurately in low gas mine, a measure method which is based on gas drainage volume of ton coal is proposed. Based on the gas drainage negative exponential decay regularity, a gas drainage model is established. Then the ton coal gas drainage volume is calculated, and compared with the original gas content in coal seam, thus obtain residual gas quantity (Wc) and drainage efficiency (η), which is used to judge the effective drainage radius of borehole,only satisfying condition of {Wc≤8m3/t∩η≥30%}, effective drainage radius could be determined. The result shows that the effective drainage radius is increased as pre-drainage time prolonged, until limit. The drainage radius in different time was analyzed in coal mine, which provides accurate drainage parameters for gas drainage effectively, and the conclusion has practical application value.