Processes, Год журнала: 2025, Номер 13(5), С. 1601 - 1601

Опубликована: Май 21, 2025

To advance the optimization of engineering parameters in in-seam borehole predrainage technology, this study developed a comprehensive analytical framework integrating theoretical modeling, numerical simulation, and field validation. Taking Pingdingshan Tian’an Coal Mine No. 1 as practical case study, we established gas-bearing coal seam drainage model based on fluid–solid coupling theory. A multifactor scheme was implemented using response surface methodology (RSM) complemented by an evaluation system focusing gas extraction efficiency coefficient (K). Numerical simulations through COMSOL Multiphysics 6.0 enabled detailed investigation single-factor influences effects, ultimately identifying field-verified optimal parameters. Key discoveries include following: (1) Spatiotemporal evolution patterns compliance zones showing stabilized interborehole pressure gradients enhanced regional connectivity after 300-day extraction; (2) parameter sensitivity hierarchy for K-value defined duration (primary) > spacing diameter negative pressure; (3) optimized configuration (4.5 m spacing, 113 mm diameter, 18 kPa pressure) achieving 54.2% reduction with 0.98 coefficient. Field data demonstrated only 2.1% average deviation from predictions, validating methodology’s effectiveness control mining operations.

Язык: Английский