气相压裂和水力割缝强化瓦斯抽采技术应用

Technical Application of Gas Drainage Reinforcement with Gas-phase Fracturing and Hydraulic Slotting

针对吉宁煤矿2203条带煤层渗透率低,瓦斯抽采浓度低的难题,提出了采用气相压裂与水力割缝联合强化瓦斯抽采技术。分析了该技术的卸压增透原理,并进行了现场试验。实验结果表明:采用单一的增透技术,瓦斯抽采浓度和抽采量会随着时间逐步降低。而采用联合强化瓦斯抽采技术,瓦斯抽采浓度及抽采量能够保持在较高水平,保障了矿井瓦斯抽采达标。

Aiming at the problems of low permeability and low gas drainage concentration in 2203 banded coal seam in Ji’ning Colliery,the author proposes a combined gas drainage reinforcement technology with gas-phase fracturing and hydraulic slitting by analysis of the principle of pressure relief and penetration enhancement of the technology,whose field test results show that the gas drainage concentration and drainage volume will gradually decrease with time with a single anti-reflection technology while the gas extraction concentration and extraction volume can be maintained at a high level and ensure the standard achieved in gas extraction with the combined gas drainage reinforcement technology.