CAJ | 학술논문

针对高瓦斯工作面采用传统U型通风上隅角瓦斯超限问题，提出了偏W型通风系统，采用数值模拟方法研究了这一通风系统瓦斯流场特征，及在保证回采安全前提下，进行了最大限度提高回采率的工作面参数优化研究。结果表明：采用偏 W 型通风系统，其工作面、回风流、上隅角瓦斯体积分数明显降低，有效地解决了U型通风瓦斯超限问题，可保证工作面的安全开采。煤柱留设宽度15 m能够保证掘进和回采期间煤柱稳定，研究成果的现场应用保证了工作面安全高效开采。这一通风系统可为其他高瓦斯综放面安全高效开采提供了一条新的技术途径。
침대고와사공작면채용전통U형통풍상우각와사초한문제，제출료편W형통풍계통，채용수치모의방법연구료저일통풍계통와사류장특정，급재보증회채안전전제하，진행료최대한도제고회채솔적공작면삼수우화연구。결과표명：채용편 W 형통풍계통，기공작면、회풍류、상우각와사체적분수명현강저，유효지해결료U형통풍와사초한문제，가보증공작면적안전개채。매주류설관도15 m능구보증굴진화회채기간매주은정，연구성과적현장응용보증료공작면안전고효개채。저일통풍계통가위기타고와사종방면안전고효개채제공료일조신적기술도경。
In view of methane overrun with U type ventilation, Partial W type ventilation system is put forward. Gas emission law is studied by numerical simulation. Working face parameter is optimized to improve extraction rate as much as possible on the premise of mining safety. Research results show that gas concentration of working face, return current and upper corner drop sharply and methane overrun problem with U type ventilation is solved effectively;when coal pillar is 15 m wide, it will be stable in the course of drifting and mining. Field application of above findings ensures safety and high efficiency mining. The ventilation system provides a new method to realize the safe and efficient mining of high gas longwall mining with sublevel caving.