文献类型：期刊文献

英文题名：Mechanical Characteristics of Superhigh-Water Content Material Concretion and Its Application in Longwall Backfilling

作者：Wang, Xufeng Qin, Dongdong Zhang, Dongsheng Sun, Chundong Zhang, Chengguo Xu, Mengtang Li, Bo

第一作者：Wang, Xufeng

通信作者：Qin, DD[1]

机构：[1]China Univ Min & Technol, Sch Mines, Xuzhou 221116, Peoples R China;[2]China Univ Min & Technol, Jiangsu Lab Min Induced Seism Monitoring, Xuzhou 221116, Peoples R China;[3]China Univ Min & Technol, Key Lab Deep Coal Resource Min, Xuzhou 221116, Peoples R China;[4]China Univ Min Technol, State Key Lab Coal Resources & Safe Min, Xuzhou 221116, Peoples R China;[5]Jizhong Energy Handan Min Ind Grp, Handan 056002, Peoples R China;[6]Univ New South Wales, Sch Min Engn, Sydney, NSW 2052, Australia;[7]Guizhou Inst Technol, Sch Mines, Guiyang 550003, Peoples R China

第一机构：China Univ Min & Technol, Sch Mines, Xuzhou 221116, Peoples R China

通信机构：corresponding author), China Univ Min & Technol, Sch Mines, Xuzhou 221116, Peoples R China.

年份：2017

卷号：10

期号：10

外文期刊名：ENERGIES

收录：;EI(收录号：20181304953088);Scopus(收录号：2-s2.0-85042758583);WOS:【SCI-EXPANDED(收录号:WOS:000414578400147)】；

基金：We acknowledge the financial support for this work, provided by the National Natural Science Foundation of China (Grant No. 51474206, No. 51404254), the National Basic Research Program of China (973 Program-No. 2015CB162500), the Fundamental Research Funds for the Central Universities (2014QNA49).

语种：英文

外文关键词：superhigh-water content material; engineering mechanical properties; cementation state; confined compression; scales effect

摘要：Superhigh-water content material (SCM) has been widely utilized for goaf backfilling, grouting, and fire prevention and extinguishing. In this paper, the engineering mechanical characteristics of superhigh-water content material concretion (SCMC) were studied for two types of backfilling technologies in longwall miningopen-type and pocket-type backfilling. The mechanical properties and responses of the SCMC were assessed under different cementation states, varying loading conditions and at different scales. The results indicate that: (1) the compressive and tensile strengths of SCMC specimens in different cementation states increase as the curing time increasesthe SCMC formed by a mixture of SCM and gangues has higher strength than that of pure SCM; (2) the SCMC is under different loading and confinement conditions when different backfilling technologies is applied; however the strength of SCMC increases with curing time and decreases with water volume percentage; and (3) large-size specimens of pure SCMC enter into an accelerated creep state at a leveled load of 1.4 MPa. The effects of SCM backfilling on subsidence control has been verified by field applications. The results presented in this paper can provide data support for the optimization of backfill mining technology using SCM, as well as for the design of hydraulic supports parameters at longwall faces.