Muhalli mai muni mai ƙarfi da ke haifar da tasirin yanayin ƙasa yana nuna ma'adinin George Fisher Zinc a yankin ma'adinai na Dutsen Isa a Arewacin Ostiraliya. Saboda haka, mai shi, Xstrata Zinc, wani reshe na ƙungiyar ma'adinai na duniya Xstrata Plc., ya so ya tabbatar da kyakkyawan kariya ta lalata ta hanyar cikakken rufe anka a cikin rami mai zurfi yayin ayyukan tuki.
DSI Ostiraliya ta ba da sinadari TB2220T1P10R Posimix Bolts don anga. Tsawon su shine 2,200mm kuma suna da diamita na 20mm. A cikin kwata na huɗu na 2007, DSI Ostiraliya ta gudanar da gwaje-gwaje masu yawa tare da haɗin gwiwar Xstrata Zinc akan rukunin yanar gizon. An gudanar da gwajin don nemo mafi kyawun abin da za a iya sanyawa anchors ta hanyar bambanta girman rijiyoyin burtsatse da resin cartridges.
Za'a iya yin zaɓi daga harsashi mai tsayi na guduro mai tsayi 1,050mm tare da duka matsakaici da matsakaicin abubuwan haɗin gwiwa a cikin diamita na 26mm da 30mm. Lokacin amfani da harsashi na 26mm a cikin rijiyoyin diamita na 35mm na yau da kullun don irin wannan nau'in anga, an sami digiri na encapsulation na 55%. A sakamakon haka, an gudanar da wasu gwaji guda biyu.
- Yin amfani da harsashi na guduro iri ɗaya da rage diamita na rijiyar burtsatse zuwa mafi ƙarancin diamita na 33mm ya sami ƙyalli na 80%.
- Tsayar da diamita na rijiyar burtsatse na 35mm da yin amfani da harsashi mafi girma na guduro tare da diamita na 30mm ya haifar da ɗaukar hoto na 87%.
Dukkanin gwaje-gwajen madadin biyu sun sami digiri na encapsulation da abokin ciniki ke buƙata. Xstrata Zinc ya zaɓi madadin 2 saboda ba za a iya sake amfani da raƙuman rawar soja na 33mm ba saboda halayen dutse na gida. Bugu da kari, mafi girman farashi mafi girma na manyan harsashi na resin sun fi cikakken diyya ta hanyar amfani da ɗimbin rawar sojan 35mm.
Saboda nasarar gwajin gwajin da aka yi, an ba DSI Ostiraliya kwangilar samar da anchors na Posimix da resin cartridges 30mm ta mai ma'adinan, Xstrata Zinc.
Lokacin aikawa: 11 ga Maris-04-2024
