【摘要】 针对顾北煤矿14321工作面煤层厚度变化大，分层综采困难多的问题，同时为减少综放开采中造成的煤炭损失，在工作面从薄煤区推进至收作线的整个回采过程中，对该工作面的放煤步距和放煤方式进行优化研究，并构建了基于数值模拟与现场实测相协同的研究方法，其核心目标是提高顶煤回收率、降低含矸率。数值模拟结果显示：采用“一采一放”时，顶煤回收率较“两采一放”和“三采一放”分别提高4.0%和10.1%；在放煤方式中，双轮顺序放煤的回收率最高，含矸率最低。现场工业试验证实，采用“一采一放”配合双轮顺序放煤的方案既能有效控制含矸率，又能显著提升顶煤回收率。更多还原

【Abstract】 For the 14321 working face of Gubei Coal Mine, where coal seam thickness varies significantly and stratified mining faces challenges, a comprehensive mining method was adopted during the full mining cycle from thin-coal zones to the stoping line to reduce coal loss in top-coal caving. A research method based on the collaboration of numerical simulation and on-site measurement was constructed to optimize the coal drawing interval and drawing method of this working face, with the core goal of improving top-coal recovery rate and reducing gangue content. Numerical simulation results show that when a "one-mining-one-drawing" method is adopted, the recovery rate of the top coal is 4.0% and10.1% higher than that of the "two-mining-one-drawing" and "three-mining-one-drawing" methods,respectively. The two rounds sequential method achieves the highest top-coal recovery rate and lowest gangue contentrate. The on-site industrial test confirmed adopting scheme of "one-mining-onedrawing" with two rounds sequential method effectively controls gangue and significantly boosts topcoal recovery rate.更多还原