关键词: 砌碹, 冒顶, 注浆, 高水速凝材料

Abstract: Based on an auxiliary rail roadway for mining engineering background, this paper analyzes the roof falling mechanism of brickwork roadway, the main reason of which are as follows: ① gaps exist between brickwork and two sides, and between brickwork and roof, and brickwork can not support surrounding rock promptly and effectively; ② bolt parameters are unreasonable, and bolt and anchor can not control roof sinking effectively, resulting in roof falling accident. According to the roof falling characteristics and mechanism of brickwork roadway, support technologies of roof falling roadway are proposed: ① lay brickworks, and fill the gap between brickwork and surrounding rock with the application of high water quick-setting material; ② with the use of high water quick-setting material, the broken surrounding rocks are grouted and strengthened; ③bolt and anchor are used to make the reinforced support of roof falling roadway. On-site mine pressure monitoring results show that this kind of technology can not only ensure construction safety, but also improve the integrity and overall bearing capability of surrounding rock, and control effectively the deformation of surrounding rock.

Key words: Brickwork, Roof falling, Grouting, High water quick-setting material