乌兰哈夏煤田灭火工程复杂地层钻进施工技术

Drilling Construction Technology in Complex Formation for Wulanhaxia Coal Field Fire Extinguishing Engineering

煤田火区烧变岩地层复杂,松散破碎、裂隙发育、胶结性差,且温度高。钻进过程中会遇到钻孔漏失、掉块、坍塌,施工效率低、成本高,施工质量难以保证。更严重的是高温伤人、伤物等施工技术和安全问题。针对该工程钻探施工技术难题,采用空气潜孔锤跟管钻进工艺,并结合钻孔高温护壁的施工方案,有效地解决了煤田灭火工程钻进施工难题,降低了钻探施工成本,提高了工程施工质量,为煤田灭火工程探索出了安全有效的钻进工艺。

The complicated burnt rock formation in coal field firing zone is loose and fractured with fracture development, poor cementation and high formation temperature. Lost circulation, block falling and collapse are often encountered in drill- ing process, which lead to low construction efficiency and high cost; it is difficult to ensure the construction quality. And what are more serious are the challenges to construction technology and the people＇ s safety under the condition of high tem- perature. Aiming at this, by the combination of the technology of air DTH drilling with casing and the scheme of wall pro- tection for high temperature drilling, the construction difficulties in coal field fire extinguishing engineering are effectively solved. The construction quality is improved and the drilling cost is reduced, this valuable drilling process is developed for coalfield fire extinguishing construction.