辽宁工程技术大学学报（自然科学版）2024，Vol.43Issue(5)：556-564,9.DOI:10.11956/j.issn.1008-0562.20240182
煤矿火烧岩爆破破碎机理及爆破参数优化
Blasting fragmentation mechanism and blasting parameter optimization of coal mine burned rock
摘要
Abstract
In order to solve the problem of unsatisfactory bench blasting effect of burnt rock in coal mine,through the combination of theoretical analysis,numerical simulation,laboratory experiment and field test,taking Dananhu No.2 open-pit coal mine as an example,the physical and mechanical properties of burnt rock,the mechanism of blasting fragmentation and the factors affecting blasting are studied,and the blasting parameters are optimized.The research shows that the strength of rock mass becomes low and easy to break after high temperature,and the cracks in rock mass are very developed.When blasting,if the crack direction is parallel to the stress wave propagation direction,the stress concentration phenomenon will occur.If the fracture direction is not parallel to the propagation direction of stress wave,the reflection and refraction of stress wave will occur at the fracture,which will shorten the action time of stress wave and aggravate the fragmentation degree of rock mass around the borehole.The use of mud to protect the hole can improve the hole forming rate of the incendiary rock step.The blasting scheme is optimized in combination with the blasting crushing mechanism of the incendiary rock.The applicability of the blasting parameter optimization is verified by the field blasting test.关键词
火烧岩爆破/爆破参数优化/节理裂隙/破碎机理/应力传播/泥浆护孔Key words
burned rock blasting/blasting parameter optimization/joint fissure/crushing mechanism/stress propagation/mud protection hole分类
矿业与冶金引用本文复制引用
宋子岭,贾正昭,文宇..煤矿火烧岩爆破破碎机理及爆破参数优化[J].辽宁工程技术大学学报（自然科学版）,2024,43(5):556-564,9.基金项目
国家自然科学基金项目(52204135) （52204135）
