文献类型：期刊文献

英文题名：Spatial size effect study of broken-expansion mass using rock-like materials under the 110/N00 mining method

作者：Guo, Pengfei[1];Zhao, Yongxu[1];Zhang, Xingyu[2];Deng, Shiwei[1];Zhang, Xiaoyun[1];Zhang, Haijiang[1];Li, Zhikang[1];He, Manchao[3]

机构：[1]Shaoxing Univ, Sch Civil Engn, Key Lab Rock Mech & Geohazards Zhejiang Prov, Shaoxing 312000, Peoples R China;[2]AGH Univ Sci & Technol, Fac Geodata Sci Geodesy & Environm Engn, PL-30059 Krakow, Poland;[3]China Univ Min & Technol, State Key Lab Geomech & Deep Underground Engn, Beijing 100083, Peoples R China

年份：2024

卷号：39

期号：5

起止页码：441

外文期刊名：GEOMECHANICS AND ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001386673200002)、、EI(收录号：20245117565599)、Scopus(收录号：2-s2.0-85212459247)、WOS

基金：This work was supported by the National Natural Science Foundation of China (No. 51904188) and the Key Laboratory of Rock Mechanics and Geohazards of Zhejiang Province (No. ZJRMG-2022-03) , which are gratefully acknowledged.

语种：英文

外文关键词：broken-expansion characteristic; bulking rock; compression tests; spatial size effect

外文摘要：The spatial size effect (SSE) of the broken-expansion mass is crucial in mining engineering, particularly with the promotion of the 110/N00 mining method. We analyzed the broken-expansion characteristics of bulking mass and introduced the space ratio and SSE coefficient to understand the SSE of broken-expansion mass. The results and analyses show a clear SSE in broken-expansion mass, and the suggested space ratio can be utilized to describe SSE. When the space ratio increases, the initial (KI) and residual (KR) broken-expansion factors increase, and the greater the space ratio, the more rapidly the increase. KI generally determines KR, but the compression inhibits SSE. The proposed SSE coefficient can express the SSE and the inhibition. Additionally, the SEE coefficient explains the SSE differentiation in the displacement characteristics. A larger space ratio leads to a greater volume reduction. Meanwhile, the bulking samples show a growing compressive capacity, and it can benefit from a smaller accumulation area. Compression failure in bulking mass is a dynamic process where structures change from loose to firm. The upper samples fail and fill voids, and the lower samples adjust positions to prevent failure. Finally, the discussion suggests the implications to the 110/N00 mining method.