岩巷测压分段分时封孔法试验研究.pdfVIP

·8 · 煤 矿 安 全 ( Total 408) 　　　　　　 　 　　 试验研究 岩巷测压分段分时封孔法试验研究 徐东方 ,胡国纪 ,王兆丰 (河南理工大学 安全科学与工程学院 ,河南 焦作 454003) 摘 　要 :煤层原始瓦斯压力对矿井瓦斯防治工作起着重要作用 ,准确测定瓦斯压力是一项重要而 又技术性很强的工作 ,成功测定获得煤层原始瓦斯压力的关键在于封孔技术 。岩巷下向孔测压 , 当隔离岩柱较厚 、煤层瓦斯压力较高时 ,利用水泥砂浆一次性封孔很容易产生漏气现象 。本文提 出分段分时封孔法 ,并在岳城煤矿加以应用 , 由试验效果可知 ,该封孔方法能够克服单纯利用水 泥砂浆封孔时产生导气裂隙现象 ,达到严密钻孔之 目的 ,从而准确测得煤层瓦斯压力值 。 关键词 :下向孔 ;漏气 ;分段分时封孔法 中图分类号 : TD 7 12　　　　文献标识码 : A 　　　文章编号 : 1003 - 496X (2008) 11 - 0008 - 03 Exper im en ta l Inve stiga tion on Sea ling M ethod of Sub section and T im e - Shar ing in Ston e Hea d XU Dong - fang, HU Guo - j i, WAN G Zhao - feng ( Ins titu te of S af ety S cience and E ng ineering, H enan P oly techn ic Un ivers ity, J iaozuo 454003, Ch ina) A b stract: The original coal - seam gas p re ssu re p lays an importan t ro le on the coal m ine’s ga s p reven tion; it is an importan t and a tech n ical work to determ inate the ga s p re ssure exactly, the key to m ain tain the original coal - seam ga s p re ssu re succe ssfu lly is the ho le sealing techn ique. It is easily to cau se steam leakage u sing the cem en t mortar to seal the boreho le in once when the sep arate rock p illar is very th ick and the ga s p ressu re is h igh when we determ inate the ga s p ressure u sing the downward - hole in the stone head. Th is arti cle p ropo se s a new sealing m ethod nam ed sealing m ethod of sub section and tim e - sharing and app lie s it in the Yuecheng Coal M ine, from the test resorts we can know that th is sealing m ethod gets over the defect that when we u se the cem ent mortar m erely to seal the borehole w ill cau se steam leakage, th is m ethod can seal the ho le s strictly and determ inate the ga s p r