采动区瓦斯地面井破断防护研究及应用  

Study and application of gas surface well broken protection in mining area

作　　者：孙东玲[1,2,3] 付军辉 孙海涛[1,2] 李日富 王然[1,2] SUN Dongling;FU Junhui;SUN Haitao;LI Rifu;WANG Ran(National Key Lab of Gas Disaster Monitoring and Emergency Technology,Chongqing 400037,China;Chongqing Research Institute,China Coal Technology and Engineering Group,Chongqing 400037,China;Shandong University of Seienee and Technology,Qingdao 266590.China)

机构地区：[1]瓦斯灾害监控与应急技术国家重点实验室,重庆400037 [2]中国煤炭科工集团重庆研究院有限公司,重庆400037 [3]山东科技大学,山东青岛266590

出　　处：《煤炭科学技术》2018年第6期17-23,共7页Coal Science and Technology

基　　金：国家科技重大专项资助项目(2016ZX05045001;2016ZX05067001);国家自然科学基金资助项目(51374236);重庆市基础与前沿专项资助项目(cstc2015jcyj BX0076)

摘　　要：为攻克采动区瓦斯地面井抽采中井筒易破断的技术难题,采用"避"、"让"、"防"、"疏"的技术理念优化完善了采动区地面井瓦斯抽采技术。用"避"的理念,得到了采动区地面井井位布置规律;用"让"的理念,完善了局部固井技术,提出了局部固井方法,"让"出了水平移动量;用"防"的理念,开发了局部防护装置,偏转结构、伸缩结构及厚壁刚性结构;用"疏"的理念,研发了悬挂完井技术,解决了三开筛管段泥沙堵孔难题。在晋煤岳城矿进行了工程应用,YCCD-02井连续抽采35个月,累计抽采瓦斯量约1 300万m^3。地面井抽采后,工作面回风巷瓦斯体积分数下降了58.75%,上隅角瓦斯体积分数下降了56%。该技术保障了煤矿回采的安全,具有推广价值。In order to overcome the technical problem of the well body easy breakdown in the gas drainage of the gas surface well in the mining area,a technical conception with＂avoiding＂,＂yielding＂,＂prevention＂and＂drainage＂was applied to optimize and improve the gas drainage technology of the surface well in the mining area. With the application of the ＂avoiding＂theory,the layout law of the surface wells in the mining area was obtained. With the application of the＂yielding＂theory,a local cementing technology was improved,local cementing method was provided and a horizontal displacement value was ＂yielded＂. With the application of the ＂prevention＂conception,the local protection device,deflection structure,telescopic structure and thick wall rigid structure were developed. With the application of the ＂drainage＂conception,the suspension well completion technology was researched and developed and the sand jammed problem at the three open screen pipe section was solved. An engineering application was conducted in Yuecheng Mine of Jincheng Anthracite Coal Mining Group,No. YCCD-02 well was continuously drained with 35 months and the total drained gas volume was about 13 million m^3. After the gas drainage operation of the surface well,the gas volume fraction in the air returning gateway of the coal mining face was reduced by58.75% and the gas volume fraction in the upper corner was reduced by 56%.The technology protected the safety mining of the mine,and would have promotion value.

关 键 词：采动区地面井 瓦斯抽采 布井规律 安全防护 

分 类 号：TD712[矿业工程—矿井通风与安全]