The development of stowage mixtures preparation technology under ore slice mining
The results of laboratory research and pilot testing are provided, on the influence of complex cement-ash binder on rheologic and strength characteristics of laying, as well as the influence of plasticizer additives on the strength characteristics of stowage massives for the conditions of ore gold mine Tellurium. The composition of stowage mixtures are developed for the stowage facilities of mine Tellurium. The article provides the description of stowage mixture production technology by mill method on the basis of cement-ash binder with the use of the mixture of broken rock and the waste of mining-metallurgical manufacture in the function of the aggregate, with the gravity flow transportation of stowage mixture into the mine working by pipelines; the description is given for the conditions of Novoleninogorsky field. The recipes for the stowage mixtures are developed. The accounting of the required characteristic strength of the storage massif for the systems of horizontal layers with laying and mining in both ascending and descending order, is performed. Strength characteristics of storage massifs under various recipes of stowage mixtures are reported. The basic technological equipment for mixture components grinding is presented. It is noted that the ultrafine grinding of binder allows reducing specific charge of cement and granulated slang, through maintaining strength characteristics of stowage massifs.