期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：252
期号：5
页码：1-12
DOI：10.1088/1755-1315/252/5/052065
出版社：IOP Publishing
摘要：The present situation and influencing factors involved in rib-spalling at a fully-mechanized coal mining face with soft and unstable seam were analyzed. The stress characteristics and the mechanism of rib spalling were modeled. Several kinds of control principles and methods were proposed, after the comprehensive comparative analysis, the measure of coal wall injection Marithan powder was conducted, comprehensive prevention and treatment measures to optimize the parameters of fully mechanized mining face for aids had been adopted. Field test results show, after the implementation of comprehensive prevention and control measures of coal wall rib-spalling, the serious rib-spalling for the depth more than 0.7 m has been completely eliminated, and the range of rib-spalling reduced to 5% from 35% of the length of the working face. The occurrence probability of rib spalling were significantly reduced, and to ensure the normal mining of working face, economic and safety benefits were significantly improved.
