摘要
从分析煤体瓦斯源解吸瓦斯过程出发，对厚煤层分层开采与综放开采两种开采方式下，工作面瓦斯涌出量作了量化对比分析。用幂指数函数描述煤体瓦斯解吸瓦斯过程，瓦斯涌出速度是呈负指数衰减的。给出了工作面和采空区瓦斯涌出量的计算公式。得到在厚煤层开采上，采用分层开采的工作面瓦斯绝对涌出量，远高于综放开采的2～4倍。指出综放开采瓦斯的不利因素，在于放煤时瓦斯的集中涌出和局部超限问题，分层开采工作面的瓦斯主要来源是采空区底分层的露煤。强调并论证了综采放顶煤开采方法，在厚煤层开采瓦斯安全方面的优势地位。
From analyzing coal-gas abstracts gas process, we contrasted and analyzed gas gushing rate from working face at high seam in slices and moveable mining. It described the process of coal- gas abstracts gas with exponent sign function and concluded gas gushing quantity attenuates with negative exponent. At same time, it presents calculating formula for gas gushing rate in working face and goaf. It concludes the quantity of gas gushing in slices outclass that in moveable mining. It pointed disadvantage factors is only that local gas will be over limit in moveable mining, gas gushing on slices working face mainly gener ares coal of down slice in goaf. The article emphasizes and demonstrates that moveable mining method in high seam has predominance of gas safety.
出处
《中国矿业》
北大核心
2006年第6期43-45,共3页
China Mining Magazine
基金
国家重点基础研究发展计划(973计划)(项目编号:2005CB221500)
