煤矿井下长钻孔保压取样器研制与应用  

Development and application of a pressure-preserving sampler for long boreholes in coal mines

作　　者：王冕 何伟[1] 王红涛 赵永超 于红 WANG Mian;HE Wei;WANG Hongtao;ZHAO Yongchao;YU Hong(Yima Coal Industry(Group)Xin'an Yunding Coal Mine Co.,Ltd.,Luoyang 471800,China;School of Resoures and Safety Engineering,Chongqing University,Chongqing 400044,China;Zhengzhou Huikuang Intelligent Technology Co.,Ltd.,Zhengzhou 450048,China;Zhengzhou High Efficient Gas Extraction Engineering Technology Research Center,Zhengzhou 450048,China;School of Resources and Safety Engineering,Henan University of Engineering,Zhengzhou 451191,China)

机构地区：[1]义煤集团新安县云顶煤业有限公司,河南洛阳471800 [2]重庆大学资源与安全学院,重庆400044 [3]郑州慧矿智能科技有限公司,河南郑州450048 [4]郑州市瓦斯高效抽采工程技术研究中心,河南郑州450048 [5]河南工程学院资源与安全工程学院,河南郑州451191

出　　处：《工矿自动化》2025年第2期19-26,共8页Journal Of Mine Automation

基　　金：河南省重点研发专项资助项目(241111320700);河南工程学院博士基金资助项目(Dkj2018020)。

摘　　要：针对煤矿井下长钻孔取样过程中存在的瓦斯损失量大、孔内条件复杂、煤样钻取率低等技术难点,设计了以高压水为驱动力、以活塞为驱动装置、以球阀为密封装置的保压取样器。该取样器通过钻杆传递水压的变化控制球阀的开启和关闭,实现煤样的高效钻取和密封保压。采用该取样器分别进行了3组常规钻孔和18组长钻孔取样试验,最大取样深度为297 m,取样过程煤层暴露时间均控制在5 min内,所取煤样瓦斯含量测定结果表明:在同一工作面,采用保压取样器取样比常规取样方式取样测试的煤层瓦斯含量大0.01~1.34 m^(3)/t,且长钻孔取样深度对煤层瓦斯含量测试数值无明显影响,表明保压取样器在取样成功后具有良好的密封保压性能,达到了煤矿井下长钻孔取样测试煤层瓦斯含量的目的。In underground coal mine long borehole sampling,significant challenges include substantial gas loss,complex borehole conditions,and low coal sample drilling rates.To address these issues,a pressurepreserving sampler is designed,integrating high-pressure water as the driving force,a piston drive,and a ball valve seal.This sampler controls the opening and closing of the ball valve through water pressure changes transmitted via the drill rod,enabling efficient coal sample drilling and pressure-preserving sealing.Experiments using the sampler included three sets of conventional borehole samples and eighteen sets of long borehole samples,with a maximum sampling depth of 297 meters.The sampler ensured coal seam exposure time during sampling was controlled within 5 minutes.Seam gas content measurement results indicated that,within the same working face,the gas content measured by the pressure-preserving sampler was 0.01-1.34 m^(3)/t higher than that from conventional methods.Additionally,the sampling depth of long boreholes showed no significant impact on gas content values,demonstrating the sampler's effective sealing and pressure-preserving performance postsampling.The pressure-preserving sampler successfully fulfills the objective of measuring coal seam gas content in underground coal mine long borehole sampling.

关 键 词：煤层瓦斯含量测定 长钻孔取样 保压取样器 球阀密封 活塞驱动 

分 类 号：TD712[矿业工程—矿井通风与安全]