采矿与安全工程学报Issue(5)：753-759,7.DOI:10.13545/j.cnki.jmse.2015.05.009
巷道底板预应力锚索注浆封孔机理及新型封孔装置设计
Sealing mechanism of the grouting bolt hole with pre-tensioned cable and design of a new sealing device in the roadway floor
摘要
Abstract
As the mining depth increases, the floor heaves has become the main factor which influ-ences the safety production and economic interest of the mine, and the pre-tensioned cable bolt with grouting is an effective way to deal with the floor heave. Because of the lack of professional and effec-tive grouting sealing devices, the procedure of grouting with pre-tensioned cable bolt has become com-plicated, ineffective and unqualified. The sealing mechanism of the grouting hole with pre-tensioned ca-ble bolt has been analyzed in this paper. The K-εtwo-dimensional turbulence model has been adopted to conclude the flow field distribution principle of slurry under different sizes of sealing length and sealing annulus. It has analysed the flow velocity and pressure variation characteristics of slurry in the sealing annulus. Then the relatively reasonable sealing length and sealing annulus have been determined. Fluid theory has been used to calculate the slurry loss and to find out the optimum size of sealing length and sealing annulus, which has provided theoretical basis for the structure size design of the sealing device and the proportioning of sealing materials in the slurry pocket. Using the research result, it has devel-oped a new sealing device for the grouting bolt hole with pre-tensioned cable.关键词
底板锚索/封孔机理/封孔长度/缝隙宽度/新型封孔装置Key words
floor cable/sealing mechanism/sealing length/size of sealing annulus/new-type sealing device分类
矿业与冶金引用本文复制引用
刘少伟,常建超,张辉,朱乾坤..巷道底板预应力锚索注浆封孔机理及新型封孔装置设计[J].采矿与安全工程学报,2015,(5):753-759,7.基金项目
国家自然科学基金面上项目(51274087)；国家自然科学基金项目(51104055) （51274087）
