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随着煤矿的高强度开采,井下抽采已不足以解决瓦斯问题,地面钻井抽采煤层气的研究正成为国内的研究的热点。通过对国内采动区地面钻井相关资料的整理分析,阐明了采动区地面钻井抽采卸压瓦斯机理,明确当前采动区地面钻井布井技术研究现状。指出利用应力场、渗流场、裂隙场耦合关系,考虑不同矿区、不同地质条件下对地面钻井控制范围进行系统研究,将为采动区地面钻井在采场走向间距布置提供理论支撑。
With the high-intensity mining of coal mines, underground gas drainage is not enough to solve the gas problem. The study of ground drilling for extracting CBM is becoming a hot spot in China. Through analyzing the data of surface drilling in the domestic mining area, the paper expounds the mechanism of surface gas drainage and pressure relief in the mining area and clarifies the current research status of surface well drilling technology in the mining area. It is pointed out that using the coupling relationship of stress field, seepage field and fracture field to systematically study the control range of ground drilling considering different mining areas and different geological conditions, it will provide theoretical support for the arrangement of ground drilling in mining area.