Materiały konferencyjne SEP 1993 - tom 2

Underground Exploitation School '93 SHALLOW MINING LAYOUT STRATEGIES Span < 1/4 depth T Oip Regional (barrier) pillan (which can incorporate geological »tnjcturvs) Ylelding (crush) pllłara, typicałly ałong guilies. Stirr face and back-aica supporl (sandwich packs, efongates) Raiaas Shaft pillar ł DJp / / z y / / z z / . / / z / Z / . Tunnel dvaistopad insome cases toprotect from excfiS9iva ttresscs Ramnant pracautfons in foice Standard supporl uaed Remnant mined out away fromMiamicalY actłva fault Bncłiat pittan teft against saismicaity actłva dyka Haulaga ivoids tra^arsing saitmieally actłve fault loss (and pfoxlmłty toteuttpiana) Raisa ledgad «nd protected throughteultintareactlon Regular famnants formed INTERMEDIATE DEPTH MINING STRATEGIES 116 Tom II