采矿与安全工程学报2016，Vol.33Issue(4)：636-642,7.DOI:10.13545/j.cnki.jmse.2016.04.011
底板型冲击危险巷道深孔断底爆破防冲原理及实践研究
Theory and application of deep hole floor-break blasting in floor rock burst coal mine
摘要
Abstract
The small deflection theory of elastic thin plate has been used to analyze the roadway floor stress condition and the main influence factors of floor rock burst have been figured out. Theory analy-sis and numerical simulation have been used to study the rock burst prevention mechanism and optimization scheme about deep hole floor-break blasting and the control effect have been tested in practice. It has been found that the mining horizontal stress is the key reason for floor heave and the layer thickness of floor, and that mechanical properties and the supporting intensity of roadway sur-rounding rock are the main influence factors of floor heave. If the floor strata is dense thick mudstone, the rock burst will happen for the elastic deformation energy released in the process of floor layer bro-ken. The essence of deep hole floor-break blasting is the combination of borehole pressure relief and blasting vibration method for rock burst prevention. When the position of blasting holes in the middle of the floor and roadway centre line, not only the high elastic deformation energy accumulated in the floor can be released and the ability of continuously transfer stress/ energy be destroyed, but also the high stress in the roadway side can be released, which has made the prevention effect more apparent.关键词
底板型冲击/深孔断底爆破/采动水平应力/底鼓Key words
floor rock burst/deep hole floor-break blasting/mining horizontal stress/floor heave分类
矿业与冶金引用本文复制引用
赵善坤,黎立云,吴宝杨,刘军,欧阳振华..底板型冲击危险巷道深孔断底爆破防冲原理及实践研究[J].采矿与安全工程学报,2016,33(4):636-642,7.基金项目
国家重点基础研究发展计划(973)项目(2010CB226806)；煤炭资源开采与环境保护国家重点实验室项目(2010DQ305023)；国家自然科学基金项目(51174112)；中国煤炭科工集团科技创新基金重点项目(2014ZD008) （973）
