煤矸石
变形(气象学)
地下水相关沉降
岩土工程
地质学
下沉
消散
破损
压缩(物理)
采矿工程
材料科学
冶金
复合材料
古生物学
海洋学
物理
构造盆地
热力学
作者
Changxiang Wang,Yao Lu,Yangyang Li,Buchu Zhang,Yanbo Liang
出处
期刊:Geomechanics and Engineering
[Techno-Press]
日期:2019-01-01
卷期号:18 (4): 417-426
被引量:2
标识
DOI:10.12989/gae.2019.18.4.417
摘要
Gangue filling in the goaf is an effective measure to control the surface subsidence. However, due to the obvious deformation of gangue compression, the filling effect deserves to be further studied. To this end, the deformation of coal gangue filling in the goaf is analyzed by theoretical analysis, large-scale crushed rock compression test, and field investigation. Through the compression test of crushed rock, the deformation behaviour characteristics and energy dissipation characteristics is obtained and analysed. The influencing factors of gangue filling and predicted amount of main deformation are summarized. Besides, the predicted equation and filling subsidence coefficients of gangue are obtained. The gangue filling effect was monitored by the movement observation of surface rock. Gangue filling can support the roof of the goaf, effectively control the surface subsidence with little influence on the ground villages. The premeter and equations of the main deformation in the gangue filling are verified, and the subsidence coefficient is further reduced by adding cemented material or fine sand. This paper provides a practical and theoretical reference for further development of gangue filling.
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