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.
出处
《煤矿安全》
CAS
北大核心
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)
关键词
预切顶
沿空留巷
巷内支护
密集支护
数值模拟
pre- cutting roof
gob -side entry retaining
support in roadway
intensive support
numerical simulation
