发明名称 |
FROZEN BACKFILL MIX FORMULATIONS AND PROCESS FOR USE THEREOF IN UNDERGROUND MINING APPLICATIONS |
摘要 |
<p>Formulations are provided for producing structural members or back fill for mine stopes in environments having sub zero temperatures such as permafrost. The formulations having constituents including crushed rock (rockfill) powdered tailings, ice and water in specific ratios with attention to the prescribed gradations of the rockfill and tailings. The tailings, a readily available and very finely divided material, fill the naturally existing voids in the rockfill. The gradation of the rockfill and the bulk density of the rockfill establish the rockfill/tailings ratio, which has been determined to lie between 1 and 3 or from 50/50 to about 75/25 for optimum strength. The ice in the mix design arises from the pre-existing moisture content in the rock and tailings, typically 2% to 5% of the rockfill and 8% to 25% for the tailings. The change of state of liquid after to ice on the particle surfaces is the binding mechanism of the system and is enhanced by vigorous mixing.</p> |
申请公布号 |
WO2010127447(A1) |
申请公布日期 |
2010.11.11 |
申请号 |
WO2010CA00686 |
申请日期 |
2010.05.04 |
申请人 |
LAURENTIAN UNIVERSITY OF SUDBURY;CLUFF, DANIEL LEONARDO;KAZAKIDIS, VASSILIOS |
发明人 |
CLUFF, DANIEL LEONARDO;KAZAKIDIS, VASSILIOS |
分类号 |
E21C41/16;E21C41/32;E21D1/12;E21F15/00 |
主分类号 |
E21C41/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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