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

作　　者：张超[1] 林柏泉[1] 周延[1] 翟成[1] 吴海进[1] 郝志勇[1] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,安全工程学院,江苏徐州221116

出　　处：《采矿与安全工程学报》2013年第6期935-939,共5页Journal of Mining & Safety Engineering

基　　金：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)

摘　　要：为改进单一高瓦斯低透气性煤层近水平瓦斯抽采钻孔密封技术，开发了“强弱强”带压封孔技术，并在常村矿N1-3工作面进行了实际应用。实践结果表明：“强弱强”带压封孔技术效果显著，比同等条件下的普通封孔方法密封效果成倍提高，钻孔瓦斯抽采体积分数由之前的26％-33％增加到现在的61％-64％，单孔470m^3瓦斯累积抽采时间由之前的10d缩短为现在的3d。该技术实施后，常村矿N1-3机巷瓦斯抽采钻孔体积分数和累积抽放量显著提高，为高瓦斯钻孔密封提供了一种新的方法，具有显著的经济和社会效益。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 N 1-3 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 

分 类 号：TD712[矿业工程—矿井通风与安全]