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Copyright of Gold (1001-1277) is the property of Gold Magazine Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In order to improve the early strength of paste filling and explore the microscopic mechanism affecting the early strength of the filling body, ratio experiments were conducted with a certain mine as the engineering back- ground on the technical schemes, that is adding coarse aggregate gravel and adopting an independently developed new cementitious material, respectively. The test results showed that the scheme of adding coarse aggregate gravel could meet the technical requirements of 28 d strength 5 MPa under most working conditions. However, to meet the requirement of 3 d strength≥2.5 MPa, it is necessary to add more than 40% coarse aggregate gravel, and ensure a concentration of more than 74% and a cement-sand ratio of 1:4 or more. On the other hand, the technical scheme using the new cementitious material as a binder could generally meet the technical requirements of 3 d strength > 2.5 MPa and 28 d strength ≥5 MPa with a concentration of 72% or above. Scanning electron microscopy (SEM) analysis of the test blocks using the new cementitious material revealed that it promoted the development of calcium aluminate crystals inside the filling body, thereby significantly enhancing the early strength. The conclusions and relevant technical parameters of the experiments can provide technical support for future filling system construction in the mine. [ABSTRACT FROM AUTHOR]

Copyright of Gold (1001-1277) is the property of Gold Magazine Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Northeastern University (Natural Science) is the property of Dongbei Daxue Xuebao and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)