摘要
为了有效控制泥化巷道底鼓,本文结合淮南矿区潘一东矿工程地质条件,在典型岩样组分测试的基础上,数值模拟研究了巷道开挖过程中底板应力分布和破坏情况,研究结果表明,样品矿物组成主体为高岭石、石英,有部分伊蒙混层和少量的蒙皂石、长石、方解石等矿物;得到了同等应力条件下巷道开挖过程中围岩塑性区的分布特征,指出存在低效加固区,得到了泥化巷道底板合理加固深度;提出了底板锚注一体化加固技术,并在潘一东矿得到应用,底板变形、离层及钻孔探测结果表明,底板锚注一体化技术有效的控制了巷道底板变形,消除因巷道底板变形严重导致的围岩结构变形失稳.
In order to control floor heaving of argillization roadway efficiently,a numerical simulation study was applied to analyze the stress distribution and failure situation of the floor during roadway excavation in this paper,based on the engineering geological conditions and experimental tests of rock sample components in Panyidong coal mine,Huainan Mining Group.The results showed that the main mineral compositions of samples are kaolinite and quartz,and also with partly illite-montmorillonite mixed layer and slightly smectite,feldspar,calcite etc.We concluded the distribution characteristics of plastic zone in surrounding rock under the same stress condition during roadway excavation,proposed the inefficient reinforcement area and obtained reasonable reinforcing depth of the floor in argillization roadway.Meanwhile,an integrated technology of floor bolting and grouting was introduced and applied successfully in Panyidong coal mine.Floor deformation,layer separation and borehole monitoring results show that the integrated technology of floor bolting and grouting can efficiently control floor heaving and eliminate deformation instability of surrounding rock structure caused by serious floor deformation.
出处
《采矿与安全工程学报》
EI
北大核心
2011年第3期356-360,共5页
Journal of Mining & Safety Engineering
基金
国家自然科学青年基金项目(50904064)
中央高校基本科研业务费专项资金资助(2010QNA29)
江苏高校优势学科建设工程资助项目
煤炭资源与安全开采国家重点实验室开放研究基金项目(SKLCRSM09X03)
关键词
泥化巷道
底板
加固深度
锚注一体化
argillization roadway
floor
reinforcing depth
intergreted technology of bolting and grouting
