Scholarlink

<p>To achieve effective zonal management of pressure-relief gas in mining faces, this study investigates the formation of dominant gas migration and storage channels through experimental simulation. An "analogous hyperbola" model, describing mining-induced strata movement, is introduced as the theoretical basis for zoning these areas. The model's applicability is evaluated by analyzing the spatial morphology of gas-enriched zones and the "dual-funnel" control mechanism imposed by key strata, leading to the establishment of formal zoning criteria. Accordingly, an integrated three-dimensional extraction strategy is designed, combining goaf buried pipes, high-level boreholes, and directional long drillholes. This approach was implemented at the 1200 mining face of a coal mine. Results show that progressive mining induces overburden collapse and fracture development, forming complex fracture networks that act as primary gas conduits under pressure gradients. Both experimental and numerical simulations confirm that strata movement follows the "analogous hyperbola" model, validating its use for gas zoning. Applying the established criteria quantitatively delineates three vertical zones: a 28&#xa0;m gas diffusion zone, a 66&#xa0;m gas buoyancy zone, and a 91&#xa0;m gas enrichment zone. Post-implementation monitoring confirms the effectiveness of the method, with gas concentrations in the upper corner, return airway, and mining face consistently maintained below 1%. This study presents an integrated methodological framework linking geomechanical strata behavior with gas dynamic response. The proposed approach aims to enhance mine safety by mitigating gas risks and to optimize energy recovery through stratified extraction. It offers a practical paradigm for coalbed methane extraction and disaster prevention, providing insights for both academic research and industrial practice.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Zoning criteria and applications for pressure-relief gas migration-storage areas in stope based on the “analogous hyperbola” model of mining-induced strata movement

  • 期刊论文

  • 发表日期：

    2026年5月6日

查看全文
  • Erhui Zhang,
  • Jinhai Liu,
  • Sitao Zhu,
  • Tao Huang

摘要

To achieve effective zonal management of pressure-relief gas in mining faces, this study investigates the formation of dominant gas migration and storage channels through experimental simulation. An "analogous hyperbola" model, describing mining-induced strata movement, is introduced as the theoretical basis for zoning these areas. The model's applicability is evaluated by analyzing the spatial morphology of gas-enriched zones and the "dual-funnel" control mechanism imposed by key strata, leading to the establishment of formal zoning criteria. Accordingly, an integrated three-dimensional extraction strategy is designed, combining goaf buried pipes, high-level boreholes, and directional long drillholes. This approach was implemented at the 1200 mining face of a coal mine. Results show that progressive mining induces overburden collapse and fracture development, forming complex fracture networks that act as primary gas conduits under pressure gradients. Both experimental and numerical simulations confirm that strata movement follows the "analogous hyperbola" model, validating its use for gas zoning. Applying the established criteria quantitatively delineates three vertical zones: a 28 m gas diffusion zone, a 66 m gas buoyancy zone, and a 91 m gas enrichment zone. Post-implementation monitoring confirms the effectiveness of the method, with gas concentrations in the upper corner, return airway, and mining face consistently maintained below 1%. This study presents an integrated methodological framework linking geomechanical strata behavior with gas dynamic response. The proposed approach aims to enhance mine safety by mitigating gas risks and to optimize energy recovery through stratified extraction. It offers a practical paradigm for coalbed methane extraction and disaster prevention, providing insights for both academic research and industrial practice.