预切顶沿空留巷巷内支护技术  

Pre-cutting Roof Gob Side Entry Retaining Supporting Technology for Roadway

作　　者：张兆一[1] 张开智[2] 尹大伟[1] 孙志帅 刘保成 

机构地区：[1]山东科技大学矿业与安全工程学院,山东青岛266590 [2]贵州理工学院采矿工程学院,贵州贵阳550003 [3]中铁二十局第四工程有限公司,河北高碑店074000

出　　处：《煤矿安全》2016年第11期222-225,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51564004;51374139);贵州省科技厅;贵州理工学院联合基金资助项目([2014]7370);山东省自然科学基金资助项目(ZR2013EEM018)

摘　　要：使用切顶技术后,留巷围岩结构形成矩形稳定区在支护系统担当支护"主力"角色。提出结合矩形承载区自稳结构理论,建立悬臂梁力学模型分析受力并计算出支护参数,并采用锚杆和密集预应力超长锚索配合W钢带和铁丝网强力支护方式技术手段。结合工程实例结果表明:运用"三位一体"合理的留巷支护措施较好满足留巷的支护需求。After the use of cutting roof technology, the surrounding rock structure of retaining roadway forming rectangular region takes on the ＂leading＂ role in support system. We propose the technology of combining self - stable structure theory of rectangular area, es- tablishing cantilever beam mechanical model to analyze and calculate the support parameters, and using anchor and intensive pre - stressed long anchor cable with W steel belt and barbed wire strong support mode. Combined with the engineering example, results show that the reasonable supporting measures of ＂trinity＂ can better meet the needs of supporting.

关 键 词：预切顶 沿空留巷 巷内支护 密集支护 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]