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中文摘要：
以某矿辅助轨道大巷为工程背景,研究分析了砌碹巷道冒顶失稳机理,主要是：①碹体与帮、顶之间存在空隙,碹体不能及时有效支护围岩;②巷道锚杆支护参数不合理,锚杆、锚索不能有效控制顶板下沉,最终导致巷道发生冒顶事故。针对砌碹巷道冒顶的特征和机理提出冒顶段巷道支护技术：①重新砌碹,应用高水速凝材料对碹体与巷道围岩之间的空隙进行壁后充填;②应用高水速凝材料对破碎围岩进行注浆加固;③应用锚杆、锚索对冒顶段巷道进行加强支护。现场矿压监测结果表明,该技术不仅保证了施工安全,而且提高了围岩整体性和承载能力,有效控制了巷道围岩变形。
英文摘要：
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.
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