摘要
孙村煤矿开采中石炭、下二叠系中煤层。煤系地层属华北型近海相,可采的稳定中厚煤层有5层,半稳定薄煤层有3层。斜井中央石门式开拓,分组联合,集中底板岩石平巷运输,反并联络近距离煤层(图1)。目前生产水平为一600m,距地表垂深800m。
the paper summarizes deformation and failures of different types of roadway when the mining depth is greater than 800m in Suncun Colliery. Based on rock pressure observations, the paper analyzes the relations between mining depth and rock lithology, between mining depth and maintenance of roadway by leaving coal pillars, and between influence of mining and pillar size. It is considered that when mining at great depth, the basic roadways should be run in hard recks, and should be away from heavy abutment pressure zone, the distance between the roadway driven in floor and coal seam must be about 35m, face geteways are driven along goaf or under the goaf, and the idle time for a prepared gateway should not in excess of 6 months, and the suitable idle time for a face start line is 1-3 months.
出处
《煤炭科学技术》
CAS
1985年第9期2-3,59,共3页
Coal Science and Technology
