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随着煤矿开采深度的增加，硫化氢(H_2S)异常涌出问题日益严重，其剧毒、易燃及腐蚀特性对井下人员安全和生产系统稳定性构成重大威胁。现有研究多集中于煤层尺度静态分析与简化扩散模型，致使H_2S扩散程度与实际工况存在较大偏差，有关考虑采煤机滚筒动态扰动的开采条件下H_2S运移规律有待深入。为此，以甘肃省新庄煤矿1802工作面为研究对象，通过开展多物理场耦合数值模拟，揭示采煤工作面及回风巷流场影响下H_2S分布规律。结果表明：回风巷内距内帮7～15 m范围为稳定涡流区，是H_2S积聚的高风险区域，其浓度可达主流区的3～5倍；采煤机移动导致的动态扰动使工作面流场压力前高后低，采煤机下风向因过流断面收缩形成局部加速区，其最大流速相较于进风风速提升了约90%;提出回风巷的流场分布分为四个典型区域：高速流区、低速流区、涡流区、边界层区，据此制定了基于流场分区的差异化防控策略，为深井煤矿H_2S灾害治理提供了新思路。
Abstract：As coal mining progresses to greater depths, the issue of abnormal hydrogen sulfide(H_2S) emissions has intensified, posing significant threats to the safety of underground personnel and the stability of production due to H_2S's high toxicity, flammability, and corrosiveness. Existing studies have predominantly focused on static analyses at the coal seam scale and simplified diffusion models, resulting in considerable discrepancies between predicted H_2S diffusion patterns and actual mining conditions. The transport mechanisms of H_2S under dynamic mining disturbances—particularly those induced by shearer operations—remain insufficiently investigated. To address this gap, this study employs a coupled multi-physics numerical simulation approach, integrating fluid flow, gas transport, and mechanical disturbance effects, to systematically analyze H_2S dispersion behavior within a fully mechanized mining face and its connected return airway. The geometric model was constructed based on the 1802 working face of Xinzhuang Coal Mine in Gansu Province, with meshing refined in regions of high gradient flow. Simulations utilized the realizable k-ε turbulence model and species transport equations, with H_2S release sources calibrated according to empirical data. Boundary conditions incorporated ventilation velocity, wall roughness, and dynamic updates to simulate shearer movement. The results indicate that the airflow field in the return airway can be categorized into four distinct zones: high-speed flow, low-speed flow, vortex, and boundary layer regions. A stable vortex zone forms 7-15 m from the inner side of the return airway, identified as a high-risk area for H_2S accumulation, where concentrations reach 3-5 times those found in the mainstream zone. Within the working face, the shearer's obstruction creates higher pressure upstream and lower pressure downstream. Due to the contraction of the flow passage cross-section downstream of the shearer, a localized acceleration zone forms, increasing the maximum airflow velocity by approximately 40% compared to the intake airflow. This acceleration intensifies turbulent mixing, which subsequently affects H_2S dilution and transport. Based on the flow field structure and gas concentration distribution, a three-zone classification for H_2S risk is proposed, along with a differentiated prevention and control strategy tailored to the aerodynamic features of each zone. The methodology and findings provide a valuable reference for H_2S hazard management in deep, high-sulfur coal mines with similar geological and mining conditions.
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基本信息:
DOI：10.13637/j.issn.1009-6094.2025.1163
中图分类号:TD711
引用信息:
[1]刘阿建,刘扬,刘浩,等.采煤工作面及回风巷流场影响下硫化氢分布规律研究[J].安全与环境学报,2026,26(07):2586-2597.DOI:10.13637/j.issn.1009-6094.2025.1163.
基金信息:
华能集团总部科技项目(HNKJ23-H9); 河南省瓦斯地质与瓦斯治理重点实验室2023年度开放基金项目(WS2023B06)
2026-03-13
2026-03-13
2026-03-13