Tailings Backfill Factors Affecting The Strength Analysis And Research

Resources and environmental problems are two major problems in our human society nowadays. With deduce of mine production, the development and utilization of mineral resources have the great impact to our surroundings and cause some damages indeed. How reasonable solutions should be formed to solve the gob problem after mining and the existence of large amount tailings have become the world's important research topics in many countries. The existence of gob areas will cause a security risk and economic issues:such as the safety of underground operations, surface subsidence and collapse, long-term monitoring of mined areas and maintenance; a lot of residue tailings pollution to surface environment, destroying soil structure and occupying a large number of surface sites. A large amount of tailings were made up as the raw materials, companied with the gelling agent as well as water, and then poured them into the mined area to hold the underground pressure. The purpose is to operate a safe underground working environment and also occupy the tailings into the ground to reduce the great damage to the environment.In this paper,54-58 regarded as the research target to provide the exact data and theoretical basis. The compressive strength of cement tailing backfill tested indoors. The cement tailing backfill was poured into the module,7cm×7cm×7cm casting mold. The Specific programs as follows:8 classified gray sand rations (1:3,1:4,1:5,1:7,1:10,1:12,1:15,1:20) which under different condition of slurry concentration(70%,72%) and tail sand level (full tailings, classified tailings) were took into the cement tailing compressive test. Each ratio gets 9 modules which divided into 3 groups and each group has 3 modules. Curing time relates to 3days,7days, and 28 days. The experiments were pouring 288modules.After the collection of compressive data from the cement tailing compressive strength test, the data analyzed directly to identify the relationship between cemented tailings backfill, gray sand ratio, slurry concentration, the sand level as well as the curing time.Secondly, according to the analyze data of twisting pillar cement tailings in the curing time about 28 days by using range and variance analysis method to identify the gray sand ratio, slurry concentration and the level sand, which aims to make sure the main factor and the secondary factor. Find out the significance of optimum combination and factors. Finally, matlab7.1 software is used to establish the compressive strength of cemented tailings backfill of the BP neural network model and Than suggested BP neural network model Comparative indoor test data and actual data. The error and calculated both by tailings cemented filling body of compressive strength of BP neural network models predict data and actual data comparison. For engineering laboratory test whether provide certain reference and basis.