摘要
保护层开采及被保护层卸压瓦斯抽采技术是防治煤与瓦斯突出最有效、最经济的区域性措施之一.通过分析保护层开采的机理和保护效果的影响因素,在反映保护层厚度与层间垂距的相对层间距基础上,综合考虑煤层赋存条件、回采参数以及层间硬岩的影响,构建了以当量相对层间距为指标的保护层分类判定法,将下保护层分为近距离、远距离和超远距离3类,上保护层分为近距离和远距离2类.通过以天府磨心坡矿急倾斜上保护层开采和阳泉新景矿近水平下保护层开采的应用,并与现场试验结果的对比表明,提出的保护层判定方法是正确和可行的,能准确地对保护层的类型做出判定.
The exploitation of protective layer and pressure-relief gas drainage for the protected layer is one of the most effective and economical regional methods to eliminate coal and gas outburst.In this paper,the protective layer was classified by the equivalent relative interval between the protective layer and the protected layer,considering the occurrence condition and mining parameters of the protective layer working face and the effluence of hard rock in the overburden,through analyzing the mechanism and influencing factors of the protective layer excavation.The under protective layer is classified into close distance layer,remote distance layer,and super-remote layer;the upper protective layer is also classified into close distance layer and remote distance layer.Then the classification and judgment method of the protective layer was used based on the geological structure of steep seam in Tianfu Moxinpo coal mine and the flat seam in Yangquan Xinjing coal mine.The comparison of the classification and field practice indicates that the classification and judgment method of the protective layer can correctly judge the type of the protective layer.
出处
《采矿与安全工程学报》
EI
北大核心
2010年第4期468-474,共7页
Journal of Mining & Safety Engineering
基金
国家重点基础研究发展计划(973)项目(2005CB221503)
国家自然科学基金重点项目(70533050)
国家自然科学基金项目(50674089)
关键词
保护层
煤与瓦斯突出
当量相对层间距
卸压瓦斯抽采
the protective layers
coal and gas outburst
the relative interval
pressure-relief gas drainage
