In slicing seams, bolt supporting was utilized under false roof and obtained good result.

介绍在分层开采煤层中, 在假顶条件下实现锚杆支护.

互联网

The roof slice longwall method increases the work of laying false roof for next slice.

长壁采煤法的采煤工艺具有多重特点:顶分层采煤增加了要为下分层填设假顶的工作.

互联网

The man - made false roof quality is very important to the mine pIt'safety in production.

人工假顶的质量对矿井的安全生产至关重要.

互联网