Technology for enhancing supporting roadway surrounding rock influenced by frequent mining and its application

doi:10.16265/j.cnki.issn1003-3033.2018.07.023

Abstract

Abstract: In order to solve the problem of poor surrounding rock support in the roadway influenced by frequent mining,a joint reinforcement technology of "bolt anchor + shallow deep grouting" was developed.The technology involves cleaning surface,floating raft,shotcrete closure,grouting,brushing lane,anchor net support and shotcrete.The grouting design includes shallow hole grouting,deep hole grouting and grouting sealing schemes.The effect of the surrounding rock strengthening support technology was demonstrated by means of mechanical analysis and downhole engineering test.The results show that by using the joint reinforcement technology of "bolt anchor + shallow deep grouting",the broken coal rock masses in the surrounding rock are consolidated,the consolidation property is improved,and the anchor cables are anchored effectively,and that the amount of change of the roof from the layer is small during the period of 5 days,and then gradually tends to be stable.

Key words: mining impact, roadway surrounding rock, broken body, enhanced support, grouting area

CLC Number:

X936

LI Guosheng, ZHANG Hui, JIANG Shuaiqi. Technology for enhancing supporting roadway surrounding rock influenced by frequent mining and its application[J]. China Safety Science Journal, 2018, 28(7): 142-147.

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