School of Safety Science and Engineering,Henan Polytechnic University Henan Provincial Key Lab of Gas eology and Gas Control-Cultivation Base of Provincial and Ministry Joint State Key Lab

为了研究软、硬煤孔隙结构的差异性对煤与瓦斯突出的影响,采用压汞法对桂箐煤矿软、硬无烟煤进行试验研究,分析对比了软、硬煤孔隙结构特征,结果表明:软、硬煤进、退汞曲线均未重合,孔隙分布较广泛,软煤微孔孔体积最为发育,微孔孔面积占98%以上,有利于瓦斯的储存,但是构成渗透容积的大、中孔及裂隙发育较少,并且存在"细颈瓶"型孔,导致软煤渗透性较差,不利于瓦斯的扩散及渗流;硬煤微孔孔体积和孔面积均发育很少,而可见孔及裂隙比较发育,因此,硬煤渗透性较软煤强,有利于瓦斯的流动及抽采;总的来说,软煤较硬煤更易发生突出。

in order to study the porous stucture differences of the soft coal and hard coal af cted to the coal and gas outburst a mercury inrusion porosimetry was appied to the experiment study on the soft and hard anthracte cal of Gulqing Mine The porous structure features of the sot.cal and hard coal vere anajzed and compared. The results showed that the mercury-injection curve and mercury-ejecion curve wer all not coincided,the pare ditibution waswide,the pore volume of the soft coal micropore was mostly developed,the pore area of the micropore wa taken over 98% an favorable for gas storage. But the big.medum pores and cacks to make up the permeable volume were less developed,a'lagena type pore existed caused the poor permeatility of the sot cal nd would not favorable to the gas dfifisionand ransfused. The pore volume ofthe hard coal micropore and araof the microporeboth were lss developed and the vistile pores and cracks were well eveloped.Thus.the permeablityof the hard cal was beter than the sot cal and would be favorableto the gas fiow and gas drainage. Generallytheoutbust would be more easly occurred in the soft coal than hard coal.

河南省高校基本科研业务费专项资金资助项目(NSFRF140105)；2015年度河南省教育厅高等学校重点科研资助项目(15A440007)；河南理工大学2014年度博士基金资助项目(B2014-004)；2014年地方高校国家级大学生创新创业训练计划资助项目(201410460036)；