中风压钻进技术在本煤层瓦斯抽排钻孔施工中的应用  

Application of Medium Air Pressure Drilling Technology in Construction of Mining-coal Bed Gas Discharging Boreholes

作　　者：沈永红[1,2] 任梅清 陈克熙 袁志刚[1,3] 王宏图[1,3] 

机构地区：[1]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400030 [2]重庆南桐矿业有限责任公司,重庆400800 [3]重庆大学复杂煤气层瓦斯抽采国家地方联合工程实验室,重庆400030

出　　处：《煤矿安全》2015年第5期84-86,90,共4页Safety in Coal Mines

基　　金：国家自然科学创新群体基金资助项目(50921063);重庆市科委自然科学基金计划资助项目(cstc2012jj B0022);川煤集团科技资助项目(2009-08);南桐矿业有限责任公司科研资助项目(2010-116)

摘　　要：针对松软突出煤层本煤层瓦斯抽排钻孔风压钻进的风压低、钻进深度小问题,基于风压钻进基本原理,提出中风压钻进技术工艺流程,集成配套中风压钻进系统和钻具等配套设备,并进行工业性试验。结果表明,与普通钻进技术相比,松软突出煤层本煤层瓦斯抽排钻孔的中风压钻进技术能有效减少钻孔施工时间,提高钻孔成孔率和钻孔深度;并指出了该技术在实际应用中存在的问题及解决方法。中风压钻进技术为松软突出煤层本煤层瓦斯抽排钻孔施工和瓦斯治理提供了一种新的途径。Aiming at low air pressure and limited drilling depth of air drilling method of gas discharging boreholes in current outburst coal seam, based on basic principle and technological process of air drilling method, combining with field experiments of gas discharging boreholes using medium air pressure drilling technology in actual outburst coal seam, medium air pressure drilling system and drilling tools for outburst coal seam were deployed, and then medium air pressure drilling technology and technology process was proposed. The field experiments results show that medium air pressure drilling technology and process can effectively reduce construction time, increase borehole area and improve success rate and drilling depth of gas discharging boreholes, which provides a new approach to solve deep borehole drilling of mining - coal bed and coal seam gas treatment ; besides, existing problems and its solutions of actual application of medium air pressure drilling technology were also indicated.

关 键 词：中风压钻进技术 瓦斯抽采 抽排钻孔施工 突出煤层 松软煤层 成孔率 

分 类 号：TD712[矿业工程—矿井通风与安全]