工矿自动化2025，Vol.51Issue(2)：19-26,8.DOI:10.13272/j.issn.1671-251x.2024120047
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
摘要
Abstract
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 pressure-preserving 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 m³/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 post-sampling.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Key words
seam gas content measurement/long borehole sampling/pressure-preserving sampler/ball valve seal/piston drive分类
矿山工程引用本文复制引用
王冕,何伟,王红涛,赵永超,于红..煤矿井下长钻孔保压取样器研制与应用[J].工矿自动化,2025,51(2):19-26,8.基金项目
河南省重点研发专项资助项目(241111320700) （241111320700）
河南工程学院博士基金资助项目(Dkj2018020). （Dkj2018020）
