韩颖，李木寅，吕帅. 顺层钻孔稳定性定量表征方法研究［J］.河南理工大学学报（自然科学版）doi: 10.16186/j.cnki.1673-9787.2025070027

Han Y，Li M Y，Lyu S. Research on quantitative characterization methods for stability of hole drilled along seam［J］.Journal of Henan Polytechnic University（Natural Science），doi: 10.16186/j.cnki.1673-9787.2025070027
DOI: 16186/j.cnki.1673-9787.2025070027

顺层钻孔稳定性定量表征方法研究

韩颖^1,2,3，李木寅¹，吕帅⁴

（1.河南理工大学 能源科学与工程学院，河南 焦作 454003；2.中原经济区煤层(页岩)气河南省协同创新中心，河南 焦作 454003；3.深井岩层控制与瓦斯抽采技术应急管理部科技研发平台，河南 焦作 454003；4.国能神东煤炭集团有限责任公司，陕西 神木 719315）

摘要: [目的] 为了研究顺层钻孔的稳定性，开展顺层钻孔稳定性定量表征方法研究。[方法] 基于有限元强度折减法，分析不同煤体强度作用下钻孔塑性区的分布特征及压力拱的演化规律，确定安全系数获取方法，采用灰色关联度分析方法，确定影响钻孔稳定性的主控因素。[结果] 结果表明：孔周塑性区会逐渐向左右两侧发展，上下两部分向中间聚拢；钻孔孔壁失稳主要源于剪切破坏；随着折减系数增加，压力拱内外边界逐渐远离孔壁，压力拱厚度也随之增加；当破坏发生时压力拱内边界位置突然远离孔壁，压力拱厚度减小；在单一因素影响下，钻孔稳定性安全系数与弹性模量、泊松比、黏聚力、内摩擦角呈正比，与煤体密度、地应力、钻孔直径、瓦斯压力呈反比；同时，还给出不考虑各因素交互作用时的安全系数计算公式；通过灰色关联度分析，确定泊松比、黏聚力、内摩擦角为影响钻孔稳定的主控因素。[结论] 采用有限元强度折减法评价顺层瓦斯抽采钻孔稳定性，对类似工程具有参考意义，影响钻孔稳定的主控因素分析可为实际钻孔稳定性评估简化提供理论依据。

关键词: 顺层钻孔；钻孔稳定性；定量表征；安全系数；强度折减法；灰关联分析

中图分类号：TD712

doi:

基金项目: 国家自然科学基金资助项目（51974108，51404093）；河南省科技攻关项目（242102320213）；河南省自然科学基金资助项目（232300420077）；河南省高校基本科研业务费资助项目（NSFRF240638）；河南省博士后科研项目（001701014）

收稿日期：2025-07-22

修回日期：2026-01-24

网络首发日期：2026-10-29

Research on quantitative characterization methods for stability of hole drilled along seam

Han Ying^1,2,3，Li Muyin¹，Lyu Shuai⁴

（1.School of Energy Science and Engineering， Henan Polytechnic University， Jiaozuo， 454003， Henan， China；2.Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region (Henan Province)， Jiaozuo， 454003， Henan， China；3.Science and Technology R&D Platform of Emergency Management Ministry for Deep Well Ground Control and Gas Extraction Technology， Jiaozuo， 454003， Henan， China；4.CHN Energy Shendong Coal Group Co.， Ltd， Shenmu， 719315， Shaanxi， China）

Abstract: [Objective] To investigate the stability of holes drilled along seam, a quantitative characterization method for borehole stability was developed, [Methods] Based on the finite element strength reduction method, the distribution characteristics of the plastic zone around the borehole and the evolution of the pressure arch under different coal strength conditions were analyzed. A method for determining the safety factor was established, and grey relational analysis was employed to identify the main controlling factors affecting borehole stability. [Results] The results indicate that the plastic zone around the borehole gradually expands laterally, while the upper and lower parts converge toward the center. Borehole wall instability is mainly governed by shear failure. With the increase in the strength reduction coefficient, both the inner and outer boundaries of the pressure arch move away from the borehole wall, accompanied by an increase in arch thickness. When failure occurs, the inner boundary of the pressure arch abruptly shifts away from the borehole wall, leading to a reduction in arch thickness. Under the influence of a single factor, the safety factor of borehole stability is positively correlated with elastic modulus, Poisson’s ratio, cohesion, and internal friction angle, and negatively correlated with coal density, in-situ stress, borehole diameter, and gas pressure. Furthermore, a calculation formula for the safety factor without considering the interaction among factors is proposed. Grey relational analysis reveals that Poisson’s ratio, cohesion, and internal friction angle are the dominant factors controlling borehole stability. [Conclusion] The stability of gas drainage holes drilled along seam was evaluated using the finite element strength reduction method, which can provide a reference for similar engineering applications. The analysis of the main controlling factors affecting borehole stability provides a theoretical basis for simplifying the evaluation of borehole stability in practice.

Key words: hole drilled along seam；borehole stability；quantitative characterization；safety factor；strength reduction method；grey relational analysis

CLC: TD712