1) pillar
巷柱
1.
The pillar mining method in steep seam mining has many advantages,such as less investment and quick,simple face supporting,easy-to-manage roof,low supporting cost,safety of high-performance,small coal pillar,the recovery rate and great potential yield etc.
巷柱式采煤法开采急倾斜煤层,具有投资少、见效快,工作面支护简单、顶板易管理、支护费用低、安全性能高、煤柱少、回采率和增产潜力大等优点。
2) roadway pillar mining
巷柱式开采
3) pillar mining
巷柱式采煤
4) roadway caving mining
巷柱式放顶煤
1.
A mechanics model of top coal is built up according to the roadway layout manner of roadway caving mining in 3.
5~10m大倾角煤层巷柱式放顶煤开采巷道布置方式,建立顶煤体力学模型。
补充资料：天柱山天柱峰
天柱山天柱峰
天柱峰又称为皖伯尖，万山尖。《道书》称为司命真人发祥所都，海拔1488.4米，孤立晴宵，顶天立地，石骨嶙峋，峭立如柱。五指、莲花、天池、含珠、飞来、月华诸峰拱卫左右，奇松、怪石、云海、佛光、各领风骚。李白《江上望皖公山》诗云：“奇峰出奇云，秀水含秀气。”白居易《题天柱峰》诗云：“天柱一峰擎日月，洞门千仞锁云雷。”
说明：补充资料仅用于学习参考，请勿用于其它任何用途。