State Key Laboratery of Deep Coal Mining & Environment Protection School of Mining Engineering, China
University of Mining and Technology School of Civil Engineering, Anhui Jianzhu University

介绍了我国井上、井下煤层气立体抽采和煤与瓦斯共采关键技术体系和发展现状,指出根据我国煤炭赋存条件的特点,必须坚持井下、地面综合抽采方针,克服煤层气地面抽采技术的不足,加大井下卸压抽采和煤与瓦斯共采的力度。总结概括了当前煤层气井下抽采、无煤柱沿空留巷墙体构筑、无煤柱留巷充填材料制备和泵送工艺、沿空留巷围岩稳定性控制、沿空留巷瓦斯综合治理等技术的现状和发展趋势,得出将地面井抽采和井下抽采相合,利用保护层开采卸压效应,施工地面钻井穿透被保护层,可大幅提高单井抽采效率,"一井两用"或"一井多用"将是未来煤层气开发的必由之路。

The paper introduced the key technical system and development status of the mine surface and underground coal bed methane three-dimensional draina ge and the coal and gas simultaneous mining, and pointed out that according to the features of the coal deposit conditions in China, the principle of the underground mi ne and mine surface gas drainage double line should be conducted, the technical bottleneck of the surface coal bed methane drainage should be broken through and th e intensity of the underground mine gas pressure releasing and gas drainage and the coal and gas simultaneous mining should be enhanced.The paper summarized th e present status and development tendency of the present underground mine coal bed methane drainage, the wall construction of the non coal pillar gateway retained a long the goaf, the backfill material preparation and pumping technique of the non coal pillar gateway retained along the goaf, the surrounding rock stability contral of the gateway retained along the goaf, the comprehensive gas control of the gateway retained along the goaf and other technology.The surface well gas drainage and the un derground mine gas drainage could be mutually integrated, with the pressure released effect from the coal mining in the protective seam, the gas well drilled at the surf ace ground could pass through the protective seam, the gas drainage rate of the single well could be highly improved and one gas well with two applications or one gas well with multi applications would be the only way for the near future development of the coal bed methane.

国家重点基础研究发展计划(973计划)资助项目(2012CB724206)；“十二五”国家科技支撑计划资助项目(2012BAF14B05)；