文献类型：期刊文献

英文题名：Research and engineering application on physical and mechanical properties of coal mine high water filling materials

作者：Wu, Shaokang Zhang, Junwen Xu, Youlin Song, Zhixiang Fan, Wenbing Zhang, Yang Dong, Xukai Chen, Zhisong Xiao, Bing Zhang, Jitao

第一作者：Wu, Shaokang

机构：[1] School of Energy and Mining, China University of Mining and Technology-Beijing, Beijing, 100083, China; [2] School of Mining Engineering, Guizhou Institute of Technology, Guizhou, Guiyang, 550003, China; [3] School of Mining, Guizhou University, Guizhou, Guiyang, 550025, China; [4] Guizhou Qianchenglijin Technology Co Ltd, Guizhou, Guiyang, 550081, China

第一机构：School of Energy and Mining, China University of Mining and Technology-Beijing, Beijing, 100083, China

年份：2023

卷号：40

期号：4

起止页码：754-763

外文期刊名：Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering

收录：EI(收录号：20233414618995)

语种：英文

外文关键词：Coal - Curing - Filling - Mining - Strength of materials - Temperature

摘要：In order to solve the problems such as high cost of filling mining of traditional paste and filling material along gob retaining roadway, complex construction technology, and insufficient support strength of filling material to meet field requirements, laboratory tests on physical and mechanical properties of materials in all aspects and field application process are carried out. The independently developed high-water materials have the characteristics of good flow performance, fast resistance increase, high early strength and high adaptation to the coal mine site environment. Different proportions of the main material and the initial water temperature have a great influence on the properties of the material. When pH = 11. 8, the strength reaches the maximum and decreases when the pH value is above or below it. When the initial water temperature reaches the critical value of 18 , the peak temperature after reaction is 48 , and the residual strength of the material can reach the best in the early and late stages. When the peak temperature is higher or lower than 48 , the material properties show a decreasing trend. The material strength is greatly affected by whether the material is cured or not. When the specimen is exposed to air for a long time, alkali release occurs, and the overall strength decreases. The different in strength under curing and uncuring is about 2 MPa. A complete set of high-water material side filling system is obtained, which is applied to the coal mine site and achieves good results. ? 2023 China University of Mining and Technology. All rights reserved.