基于浅孔水平爆破效果的堵塞参数研究
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摘要
针对浅孔爆破堵塞参数不合理所导致的堵塞效果差、成本高和堵塞工艺复杂等问题,采用理论分析和试验研究相结合的方法,优化设计了堵塞结构,根据堵塞器动力学方程,建立了最优堵塞长度计算式,通过改变堵塞长度进行爆破试验,得到大块率变化曲线,结果表明最优堵塞长度范围为0.3~0.4 m,验证了最优堵塞长度计算式的可靠性。使用不同堵塞结构的工业性对比试验结果表明,在堵塞长度为最优长度时,采用胀裂式堵塞结构,提高了单循环进尺和炮孔的利用率,降低了装药量,简化了填塞工艺,降低了爆破成本。
Aiming at the problems such as bad blocking effect,high cost and complex blocking technique caused by unreasonably blocking parameters for shallow-hole blasting,combined method of theoretical analysis and test research was adopted to optimize and design blocking structure.According to the dynamic equation of plugging device,calculation method of optimal blocking length was established;through changing the blocking length,the changing curve of boulder yield was obtained,the results showed that the optimal blocking length ranged from 0.3m to 0.4 m,which verified the reliability of the calculation method.The results of industrial contrast test with different blocking structures indicated that optimal blocking length and expansion blocking structure could improve the availability of single cycle footage and blasting holes,decrease the explosive payload,simplify the blocking technology and reduce the blasting cost.
Aiming at the problems such as bad blocking effect,high cost and complex blocking technique caused by unreasonably blocking parameters for shallow-hole blasting,combined method of theoretical analysis and test research was adopted to optimize and design blocking structure.According to the dynamic equation of plugging device,calculation method of optimal blocking length was established;through changing the blocking length,the changing curve of boulder yield was obtained,the results showed that the optimal blocking length ranged from 0.3m to 0.4 m,which verified the reliability of the calculation method.The results of industrial contrast test with different blocking structures indicated that optimal blocking length and expansion blocking structure could improve the availability of single cycle footage and blasting holes,decrease the explosive payload,simplify the blocking technology and reduce the blasting cost.
引文
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[5]Luo Y,Cui X Y,Shen Z W.Application study on controlled blasting technology with shaped charge in rock mass[J].Chinese Quarterly of Mechanics,2007(2)
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[8]李启月.刘冰川等.深孔爆破一次成井炮孔合理堵塞长度[J].科技导报,2013(19)
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[11]王琛,文忠,曹梦宇.隧道爆破中炮泥的作用与堵塞长度计算[J].采矿技术,2011(5)
[12]罗伟,朱传云等.隧洞光面爆破中炮孔堵塞长度的数值分析[J].岩土力学,2008(9)
[13]张袁娟,韩红强等.炮孔堵塞对爆破效果影响研究[J].煤炭技术,2014(5)
[14]丁希平,王中黔,冯叔瑜.堵塞长度对台阶爆破作用影响的数值模拟[J].煤炭学报,2001(4)
[15]唐中华,张志呈等.炮孔堵塞及堵塞方法对爆破效果的影响[J].西南工学院学报,1998(2)
[16]张艳军,雷美荣等.快速封堵注水胀裂管状炮眼堵塞器[P].中国:z1201420470671.x,2015-01-07
[17]徐颖,孟益平,程玉生.装药不耦合系数对爆破裂纹控制的试验研究[J].岩石力学与工程学报,2002(12)
[18]张艳军,雷美荣等.炮孔楔形体堵塞器研究[J].煤炭工程,2015(1)