张盼1, 潘博杰2, 秦金辉1,等.失效钻孔单通道二次注浆精准堵漏技术与装备研究[J].河南理工大学学报（自然科学版）,2026,45(1):103-109.

ZHANG P, PAN B J, QIN J H, et al.Study on precision plugging technology and equipment for secondary grouting in failed single-channel boreholes[J].Journal of Henan Polytechnic University(Natural Science) ,2026,45(1):103-109.

失效钻孔单通道二次注浆精准堵漏技术与装备研究

张盼1, 潘博杰2, 秦金辉1, 郝富昌2, 高保彬2

1.霍州煤电集团有限责任公司，山西 临汾 031400；2.河南理工大学 安全科学与工程学院，河南 焦作  454000

摘要: 目的 针对钻孔漏气严重和瓦斯抽采体积分数较低等问题，开展失效钻孔单通道二次注浆精准堵漏技术与装备研究。 方法 研发钻孔漏气位置精准检测装置，通过测试管底不同位置瓦斯抽采体积分数查明钻孔漏气的具体位置，研制失效钻孔管底二次注浆精准堵漏技术与装备，对李雅庄煤矿2-803工作面23个低体积分数失效钻孔进行精准堵漏。 结果 结果表明：该装备二次注浆压力可达2.0 MPa，堵漏效果良好，且此装置封孔段长度和深度可自由调节，全段可回收，工艺简单快捷，方便现场施工；依据瓦斯抽采体积分数差确定2-803工作面钻孔距孔口17~23 m处漏气较为严重。采用管底二次注浆精准堵漏技术，注浆前平均瓦斯抽采体积分数29.01%，二次注浆1天、1周、1月后孔内瓦斯抽采体积分数增至81.35%，80.47%，70.66%，分别提高了1.8，1.77，1.44倍；注浆前钻孔平均瓦斯抽采纯量为0.05 m3/min，注浆1天、1周、1月后的钻孔平均瓦斯抽采纯量增至0.161，0.158，0.141 m3/min，分别提高了2.2，2.16，1.82倍。 结论 该技术与装备可对低体积分数失效钻孔进行精准堵漏，减少瓦斯治理成本，提高瓦斯治理效能。

关键词:瓦斯抽采;失效钻孔;二次注浆;精准堵漏

doi:10.16186/j.cnki.1673-9787.2023120061

基金项目:国家自然科学基金资助项目（52274188）

收稿日期:2023/12/21

修回日期:2025/04/25

出版日期:2025-12-03

Study on precision plugging technology and equipment for secondary grouting in failed single-channel boreholes

Zhang Pan1, Pan Bojie2, Qin Jinhui1, Hao Fuchang2, Gao Baobin2

1.Huozhou Coal ＆ Power Group Co.， Ltd.， Linfen  031400， Shanxi， China；2.School of Safety Science and Engineering， Henan Polytechnic University， Jiaozuo  454000， Henan， China

Abstract: Objectives To address the problems of severe air leakage and low gas extraction concentration in failed boreholes， a study was carried out on precision plugging technology and equipment for secondary grouting in single-channel failed boreholes. Methods An accurate detection device for locating borehole air leakage was developed. The specific leakage position was identified by measuring the gas extraction concentration at different positions along the pipe bottom. Based on this， precision plugging technology and equipment for secondary grouting at the pipe bottom of failed boreholes were designed. A total of 23 low-concentration failed boreholes in the 2-803 working face of Liyazhuang Coal Mine were treated using this technology. Results The developed equipment achieved a secondary grouting pressure of up to 2.0 MPa with good plugging performance. The sealing-section length and depth can be freely adjusted， and the entire device is fully retrievable， making the process simple， efficient， and convenient for field application. According to the differences in gas extraction concentration， the main leakage channel of the 2-803 working face was determined to be located 17~23 m from the borehole collar. After applying the technology， the average gas extraction concentration increased from 29.01% before grouting to 81.35%， 80.47% and 70.66% after one day， one week， and one month， corresponding to increases of 1.8， 1.77 and 1.44 times， respectively. The average pure gas extraction rate increased from 0.05m3/min to 0.161， 0.158， and 0.141 m³/min， representing increases of 2.2， 2.16 and 1.82 times， respectively. Conclusions The proposed technology and equipment can achieve precision plugging of low-concentration failed boreholes， reduce gas control costs， and improve the effectiveness of gas extraction and management.

Key words:gas drainage;failure borehole;equipment;secondary groutingprecision plugging