Experimental Study on Rheological Properties and Strength Variation of High Concentration Cemented Unclassified Tailings Backfill
This experimental study presents the rheological properties and strength characteristics of cemented unclassified tailings backfill (CUTB). The particle size distribution and chemical properties of tailings from the Shizhuyuan lead-zinc mine were examined experimentally. A series of rheological prop...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Hindawi Limited
2020-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/6360131 |
| _version_ | 1798033174829203456 |
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| author | Shijiao Yang Xing Xing Shuai Su Fulin Wang |
| author_facet | Shijiao Yang Xing Xing Shuai Su Fulin Wang |
| author_sort | Shijiao Yang |
| collection | DOAJ |
| description | This experimental study presents the rheological properties and strength characteristics of cemented unclassified tailings backfill (CUTB). The particle size distribution and chemical properties of tailings from the Shizhuyuan lead-zinc mine were examined experimentally. A series of rheological properties and uniaxial compressive strength (UCS) tests were conducted to study the relations between the rheological properties of CUTB and two factors of cement-tailings ratio (c/t) and solid content (SD). The two-factor nonrepetitive analysis of variance (ANOVA) method was used to study the sensitivity of rheological properties to two factors of c/t and SD. Relations between UCS performance of CUTB and c/t, SD, and curing time (CT) were discussed. Results indicate that CUTB samples exhibit obvious shear thinning characteristics and the rheological process is the result of multiple rheological model composites. Yield stress and viscosity of CUTB increase with the increase of SD and c/t as quadratic. The solid content is the most important factor for the rheological properties of CUTB, followed by c/t. UCS of CUTB increases exponentially with the increase of SD and increases with c/t as quadratic. The larger the ratio of c/t, the greater the influence of the CT on the increasing strength of CUTB. The smaller the c/t, the slower the increase of the CUTB’s strength with the increase of the SD. The findings of this study can provide the efficient mix proportion of backfill slurry for the backfill mining design, so as to have better performance of the underground mining structure and reduce the cost of backfill mining. |
| first_indexed | 2024-04-11T20:26:05Z |
| format | Article |
| id | doaj.art-77b6736ff385467aae6063c196bf5da9 |
| institution | Directory Open Access Journal |
| issn | 1687-8434 1687-8442 |
| language | English |
| last_indexed | 2024-04-11T20:26:05Z |
| publishDate | 2020-01-01 |
| publisher | Hindawi Limited |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj.art-77b6736ff385467aae6063c196bf5da92022-12-22T04:04:39ZengHindawi LimitedAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/63601316360131Experimental Study on Rheological Properties and Strength Variation of High Concentration Cemented Unclassified Tailings BackfillShijiao Yang0Xing Xing1Shuai Su2Fulin Wang3School of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, ChinaSchool of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, ChinaSchool of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, ChinaSchool of Resource & Environment and Safety Engineering, University of South China, Hengyang 421001, ChinaThis experimental study presents the rheological properties and strength characteristics of cemented unclassified tailings backfill (CUTB). The particle size distribution and chemical properties of tailings from the Shizhuyuan lead-zinc mine were examined experimentally. A series of rheological properties and uniaxial compressive strength (UCS) tests were conducted to study the relations between the rheological properties of CUTB and two factors of cement-tailings ratio (c/t) and solid content (SD). The two-factor nonrepetitive analysis of variance (ANOVA) method was used to study the sensitivity of rheological properties to two factors of c/t and SD. Relations between UCS performance of CUTB and c/t, SD, and curing time (CT) were discussed. Results indicate that CUTB samples exhibit obvious shear thinning characteristics and the rheological process is the result of multiple rheological model composites. Yield stress and viscosity of CUTB increase with the increase of SD and c/t as quadratic. The solid content is the most important factor for the rheological properties of CUTB, followed by c/t. UCS of CUTB increases exponentially with the increase of SD and increases with c/t as quadratic. The larger the ratio of c/t, the greater the influence of the CT on the increasing strength of CUTB. The smaller the c/t, the slower the increase of the CUTB’s strength with the increase of the SD. The findings of this study can provide the efficient mix proportion of backfill slurry for the backfill mining design, so as to have better performance of the underground mining structure and reduce the cost of backfill mining.http://dx.doi.org/10.1155/2020/6360131 |
| spellingShingle | Shijiao Yang Xing Xing Shuai Su Fulin Wang Experimental Study on Rheological Properties and Strength Variation of High Concentration Cemented Unclassified Tailings Backfill Advances in Materials Science and Engineering |
| title | Experimental Study on Rheological Properties and Strength Variation of High Concentration Cemented Unclassified Tailings Backfill |
| title_full | Experimental Study on Rheological Properties and Strength Variation of High Concentration Cemented Unclassified Tailings Backfill |
| title_fullStr | Experimental Study on Rheological Properties and Strength Variation of High Concentration Cemented Unclassified Tailings Backfill |
| title_full_unstemmed | Experimental Study on Rheological Properties and Strength Variation of High Concentration Cemented Unclassified Tailings Backfill |
| title_short | Experimental Study on Rheological Properties and Strength Variation of High Concentration Cemented Unclassified Tailings Backfill |
| title_sort | experimental study on rheological properties and strength variation of high concentration cemented unclassified tailings backfill |
| url | http://dx.doi.org/10.1155/2020/6360131 |
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