采矿与安全工程学报Issue(6)：935-939,5.
本煤层近水平瓦斯抽采钻孔“强弱强”带压封孔技术研究
Strong-weak-strong borehole pressurized sealing technology for horizontal gas drainage borehole in mining seam
摘要
Abstract
To improve the borehole sealing technique of horizontal gas drainage for low permeability and high gassy single coal seam, the“strong-weak-strong”borehole pressurized sealing technology was developed in this paper, and the technology was practically applied in N1-3 Coal Face of Changcun Coal Mine. The practical results show that the technology has siginificant sealing effect, and the effect is increased by times against those of the common ways under the same conditions, namely, the gas ex-traction concentration increases from 26%~33%to 61%~64%, and the accumulated extraction time of single-hole with 470 m3 gas decreases form 10 d to 3 d. After its implementation in Changcun Coal Mine, the gas extraction concentration and gas accumulated quantity in tailentry of N1-3 Coal Face have been significantly improved. Thus, this technology has provided a new technical measure for borehole sealing in the condition of high gas contents, and has significant economic and social benefits.关键词
低透气性煤层/钻孔密封/强弱强/带压封孔/瓦斯抽采Key words
low permeability coal seam/borehole sealing/strong-weak-strong/borehole pressurized sealing/gas extraction分类
矿业与冶金引用本文复制引用
张超,林柏泉,周延,翟成,吴海进,郝志勇..本煤层近水平瓦斯抽采钻孔“强弱强”带压封孔技术研究[J].采矿与安全工程学报,2013,(6):935-939,5.基金项目
国家重点基础研究发展计划(973)项目(2011CB201205)；国家科技支撑计划项目(2012BAK04B07)；国家自然科学基金项目(51074161) （973）
