TY -的A2 -雪,易盟——江Bangyou盟——顾Shitan AU - Li Wenshuai盟——张Guangchao盟——张,华贵的PY - 2021 DA - 2021/07/22 TI -瓦斯综合治理方法的案例研究在低渗透性的机械化放顶煤Ultrathick煤层SP - 5558678六世- 2021 AB -切片机械化放顶煤开采是一个标准的高效Ultrathick煤层的开采方法。然而,瓦斯治理的有效性强调的困难完全机械化放顶煤开采过程的低渗透性ultrathick煤层。这项研究集中在矿业Liuhuanggou煤矿9 - 15号煤,中国新疆。这一目标,理论分析和现场测试的结果结合探索综合机械化放顶煤瓦斯治理方法的低渗透性ultrathick煤层。没有。(15)06面板是top-slicing面板9 - 15号煤的开采9米的高度。气体分析结果显示,在没有气体排放。(15)06面板主要来自煤壁、屈服前煤采空区,邻近煤层。基于气体源分离,提出了一种综合瓦斯治理方法。该方法是基于气体predrainage与煤层的结合,近钻井,preburial采空区的管道,压力平衡通风。 The permeability and gas predrainage were enhanced by hydraulic fracturing in low-permeability coal seams. According to the characterizations of coal seam and crustal stress distribution, the arrangement of the boreholes and backward-segmented fracturing technology were designed. From the field results, the coal seam presented a remarkable prefracturing under hydraulic fracturing. Besides, the mean gas predrainage from the boreholes was enhanced by four times compared to the prehydraulic fracturing state. Finally, using the proposed comprehensive control method based on the gas sources, field tests were performed in the No. (9-15)06 panel. The measured results demonstrated that gas concentration in the return airflow is fluctuated within a range of 0.05% to 0.35%. The proposed gas control method can provide an insightful reference for other similar projects. SN - 1468-8115 UR - https://doi.org/10.1155/2021/5558678 DO - 10.1155/2021/5558678 JF - Geofluids PB - Hindawi KW - ER -