Preferable safety and economy technicalbenefit may be obtained through reasonable and economical method of non coal pillar Gob-side Entry Retaining Mining and the layout of normal heading stope.
英
美
- 通过合理、经济的无煤柱沿空留巷方法布置正规采煤工作面进行回采可获得较好的安全、经济技术效益。