摘要
为解决静态破碎剂因喷孔而损失膨胀压的问题,本文在膨胀和喷孔机理的基础上提出了水化调整和柱状装药2种方案,测试了膨胀压;通过破碎混凝土试验模拟破岩,利用数值仿真分析了破碎过程。结果表明:水化调整会进一步损失膨胀压;柱状装药能减慢静态破碎剂的失水速度,提高水化程度,能产生62.30 MPa的膨胀压,达到理论值的94.38%;柱状装药的方法能有效破岩和防喷;仿真与试验的结果相一致,能为工程方案设计提供经济、高效的手段。
Hydrated adjustments and the cylindrical charge method based on the swelling and spraying mechanisms were proposed to address the expansion pressure loss of a static cracking agent due to the spray orifice.The expansion pressure was then measured.Rock breaking was simulated via the trial breaking of a concrete specimen,and the corresponding cracking process was analyzed by numerical simulation.Results indicated that hydrated adjustments for the static cracking agent would cause greater losses in expansion pressure and that the cylindrical charge could decelerate water loss and provide an expansive pressure of 62.30 MPa,which accounts for 94.38%of the theoretical value.The cylindrical charge method could effectively crack rocks and prevent spray.The simulation results agreed well with the trial findings.This work provides an economical and high-efficiency approach for engineering design.
作者
陈卫东
吴培文
于会军
徐国庆
孙宏宇
李小龙
邰和宇
CHEN Weidong;WU Peiwen;YU Huijun;XU Guoqing;SUN Hongyu;LI Xiaolong;TAI Heyu(College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China;Heilongjiang Longmay Jixi Mining Co. Ltd., Jixi 158100, China)
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2021年第9期1295-1302,共8页
Journal of Harbin Engineering University
基金
国家自然科学基金项目(51508123)
黑龙江省自然科学基金项目(LH2019A008).
关键词
静态破碎剂
防喷
膨胀压
水化调整
柱状装药
数值仿真
static cracking agent
spray prevention
expansion pressure
hydrated adjustments
cylindrical charge
numerical simulation
