西安科技大学学报2017，Vol.37Issue(5)：668-673,6.DOI:10.13800/j.cnki.xakjdxxb.2017.0511
深部综采工作面厚顶板爆破控灾技术及应用
Technology and application of blasting crack aiming at thick roof of deep fully mechanized mining face
摘要
Abstract
Dynamic hazards are easily induced by thick roof instability in deep fully mechanized mining face.This paper focus on the controlling problem of thick roof of deep fully mechanized mining face.The mechanical analysis model of roof blasting has been built on the basis of considering coal-rock constitutive relations.Meanwhile,crack propagation radius,blasting positions and height of deep rock mass are calculated using finite element program(LS-DYNA),fluid-solid coupling algorithm (Arbitrary LagrangeEuler,ALE)and discrete element method (3DEC).These results could provide significant guidance for hazards prevention by blasting.Results show that stress concentration areas and moment of B support point (MB) could be removed in reacting on mechanical behavior of blasting.Also,the maximum radius of crack propagation of deep rock mass is 2.60 m and the maximum radius of effective stress wave is 5.65 m.Therefore,the distance between blasting holes are designed as 10 m.Main crack propagation extends along the radial direction,and secondary crack propagation direction shows randomness.Finally,analysis on effective working resistance of hydraulic support proves that blasting has an obvious effect on the roof fracture.关键词
深部开采/厚顶板/深孔爆破/裂纹扩展/动力灾害Key words
deep mining/thick roof/deep holes blasting/crack propagation/dynamic hazards分类
矿业与冶金引用本文复制引用
麻彦雄,梁智军,吴兆华,毋凡..深部综采工作面厚顶板爆破控灾技术及应用[J].西安科技大学学报,2017,37(5):668-673,6.基金项目
葫芦素矿井软岩层覆岩运动控制与采掘工艺研究 （）
