围岩孔裂隙充水承压爆破过程分析

发布时间：2018-04-28 03:04

本文选题：承压水 + 波传播　；参考：《中国矿业大学学报》2017年05期

【摘要】：为揭示围岩孔裂隙充水承压安全高效爆破作用机理,采用理论和试验分析方法对承压爆破过程及效果进行分析.建立了承压爆破围岩裂隙扩展模型,揭示了孔内承压水"楔入"裂隙空间后的围岩裂隙扩展规律.研究表明:围岩孔内承压水的存在对波的传播与破岩具有积极作用,钻孔狭小空间内爆轰产物与介质膨胀过程是等熵的;围岩孔裂隙充水承压爆破是孔内冲击波、应力波先导破岩及承压水后续膨胀增裂共同作用的结果;试验证实了围岩孔裂隙充水承压爆破的高效性,由于介质的湿润、降温以及稀释作用,承压爆破过程中的有害物质得到较好控制,既达到了高效能炸药爆轰作用下的安全静态破岩目的,又实现了爆炸超动载与承压水静载作用的统一.
[Abstract]:In order to reveal the mechanism of safe and efficient blasting with water filling and bearing pressure in surrounding rock holes, the process and effect of confined blasting are analyzed by theoretical and experimental analysis methods. The crack propagation model of confined blasting surrounding rock is established, and the crack propagation law of surrounding rock is revealed after the confined water in the hole is wedged into the crack space. The study shows that the existence of confined water in the surrounding rock hole has a positive effect on the wave propagation and rock breaking, the detonation product and the medium expansion process are isentropic in the narrow space of the borehole, and the water-filled confined blasting in the surrounding rock hole is the shock wave inside the hole. The results of stress wave leading rock breaking and subsequent expansion and cracking enhancement of confined water have proved the high efficiency of water-filled blasting in surrounding rock holes, due to the effect of wetting, cooling and dilution of the medium. The harmful substances in the process of pressurized blasting are well controlled, which not only achieves the purpose of safe static rock breaking under the action of detonation of high efficiency explosives, but also realizes the unification of explosive overloading and static loading of pressurized water.
【作者单位】：中国矿业大学矿业工程学院深部煤炭资源开采教育部重点实验室;大同煤矿集团有限责任公司;
【基金】：国家自然科学基金项目(51604262) 江苏省自然科学基金项目(BK20160256) 中国博士后科学基金项目(2015M581896) 江苏省博士后科研资助项目(1601212C)
【分类号】：TD235

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