長ちょう壁へき式しき採さい炭たんMeaningsNoun1. longwall miningKanji used長long壁wall式ceremony採collect炭charcoalComposed of長ちょうhead; chief; leader; elder; merit; strong point; superiority; majorNoun壁へきwall; partition; barrier; obstacle; hindrance; difficulty; Chinese "Wall" constellation (one of the 28 mansions)Noun式しきway; style; fashion; method; system; form; type; ceremony; rite; ritual; …Noun採さい炭たんcoal mining; coal extractionNoun