Advanced Search (Items only)
Tags: backfill, crosscut, demonstration, disposal, environment, extraction, fine, flow, gob, grid, health, injection, mine, panel, pillar, room, safety, subsidence, surface, underground, waste
Tags: alternate, cost, cut, extraction, geometry, geotechnical, pillar, productivity, ratio, room, room-and-pillar, sequence
Tags: extraction, factor, geometry, mining, pillar, productivity, ratio, room, safety, sequence
atom, dcmes-xml, json, omeka-xml, rss2