文档介绍：煤层突出倾向与其孔隙结构的相关性研究
摘要:为了预测矿井的煤与瓦斯突出危险性,以沁水煤田的两高瓦斯矿井为例,通过压汞法测量典型煤样的微观孔隙结构、孔容和孔比表面积在一定孔径范围内的分布规律,结合瓦斯的赋存、吸附和解吸释放机理来分析预测矿井的瓦斯突出危险性。实验结果表明,两种煤样在测量尺度范围内的孔径分布规律基本相同,不同孔径的孔隙占孔隙总量的百分比基本一致,1#煤样的孔容和孔比表面积是2#煤样的2倍,而且小于10nm的微孔的孔比表面积分别占总面积的73%和63%。根据矿井的实测数据,开采过程中余吾矿的相对瓦斯涌出量是对比矿井的2倍,证实孔隙结构预测突出危险性的科学性。结论对预测沁水煤田新建矿井的煤与瓦斯突出危险性具有一定的参考价值。
关键词:采矿工程;煤与瓦斯突出;孔隙结构;孔比表面积;细观研究
基金项目:太原理工大学引进人才基金项目(2012);国家自然科学基金项目(51104193)。
作者简介:翟雷(1983- ),男,陕西咸阳人,助理工程师,在读工程硕士研究生,主要从事煤矿安全生产管理等工作。通讯作者:赵东(1986- ),男,山西大同人,博士,讲师,主要从事煤层气开采和瓦斯综合利用等方面的教学和研究工作。
CORRELATION STUDY BETWEEN COAL SEAM OUTBURST TENDENCY AND POROUS STRUCTURE
Abstract: In order to forecast the fatalness of coal and methane outburst in mine, microcosmic porous structures of typical coal samples have been measured through Hg-injection methods. Coal samples brought from two High methane mining in Qin-shui Coalfield. At definite porous scales, distribution laws of porous volumes and specific surface areas have been studied. Combined with existence, absorption and desorption outburst mechanism, fatalness of methane outburst has been forecasted of mining. The experimental conclusions showed that: there are essential identical in porous distribution law of measured scale-sized ranges between two coal samples and percentage of definite different porous diameter ranges in total porous volumes. Porous volumes and specific surface areas of 1# coal sample