近距离煤层群强化瓦斯抽采效果研究

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中图分类号：0659；TD7 文献标志码：A文章编号：1001-5922（2025）10-0163-04

Research and practice of comprehensive gas control technology for closely spaced coal seam groups

WU Bin （China Coal Group，Xinji Energy Co.，Ltd.，Huainan 232OO1，Anhui China）

Abstract：Inclose range coal seam mining，technical botlenecks such as lowcoal seam permeabilityand slow effectivenessare caused by negative pressure gas extraction. Taking Xinjiyi Mine as the background，this paper explores the effect of injecting N2-O 12 mixed gas to drive and enhance gas extraction. Among them，by constructing a THM（thermal fluid solid）coupling model and then using COMSOL software to simulate the effects of gas injection pressure，initial coal seam temperature，and permeabilityon the extraction eficiency.The results showed that the increase in injection pressure significantly accelerated the decrease in CH l4 pressure and increased cumulative production;Although the initial temperature riseofcoal seams can reduce gas pressre，it will inhibit cumulative production;Anincrease in theinitial permeabilityofcoal seams cansignificantly improve the efficiencyof gas extraction.Throughthis study，itcan provide engineering application reference value for gas control in close range coal seam groups.

Key words： closely spaced coal seam group;comprehensive gas control;gas drainage efect;numerical simulation

煤炭作为我国主体能源，其安全高效开采对国家能源安全具有战略意义。（剩余5004字）