复杂岩体不对称V型斜线起爆网路爆破效果分析
Analysis of blasting effect of asymmetric V-shaped oblique initiation network in complex rock mass
-
摘要: 为减小干旱区深凹露天煤矿在复杂岩体赋存条件下爆破所产生的岩体大块和近距离爆破对到界台阶的振动影响，基于对新疆托克逊县库米什露天煤矿复杂岩体岩体结构、岩性特点、破裂面构成、形态和节理、裂隙发育变化趋势影响分析和爆破作用对边坡安全稳定分析研究，提出了：①在接近台阶坡面进行剥离作业的爆破岩石台阶，至少有1个侧向自由面和正向自由面，起爆点位于台阶上部侧向和正向自由面交汇处，爆轰由外向内沿斜线方向传爆，避免受节理、裂隙和结构面影响使爆破能量集中作用在某一爆破区域而出现的爆破病害；②优选不对称单侧向自由面非电导爆管加“四通”的V型斜线多段位单位药量毫秒微差间隔逐次起爆的爆破网路，使爆破能量沿炮区对角斜线方向分散作用并使爆破作用效果平衡，有别于直线型排间和孔间逐孔毫秒微差爆破起爆使爆破后冲效应大，对边坡产生振动危害；③采用不耦合分段或连续集中装药非电导爆管雷管加起爆药加膨化铵油炸药逐孔毫秒微差起爆技术孔内药包多点瞬发起爆，使炸药爆炸时压缩应力波峰值随装药表面到炮孔壁的距离增大而下降，减少应力波对岩壁的过度破碎而使爆破效能更加持续有效。爆破试验结果表明，所采用的爆破关键技术，使爆破岩石大块率降低5%～8%，爆堆沉降高度小于2 m，爆破能量分配更加均匀，既有利于边坡安全稳定，又便于4 m3液压反铲的采装，对于解决干旱区复杂岩体深凹露天矿爆破技术问题有借鉴之用。Abstract: In order to reduce the arid zone of deep concave open-pit coal mine in complicated rock mass blasting of rock mass under the condition of large and close the blasting vibration effect of to the world stage,based on xinjiang toksun county qomi assorted open-pit coal mine complex rock mass structure,lithologic characteristics of rock mass,the fracture surface structure,morphology and joint,fracture analysis of the influence of the change trend and the analysis of blasting effect on safety and stability of slope research,put forward:①near the slope stripping operations of blasting rock steps,is at least one side free surface and free surface,the initiation point is located at the junction of steps and the upper lateral positive free surface explosive detonation outside-in along the diagonal direction,avoid affected by joints,fractures and structural plane the blasting energy concentrated effect in a blast disease in the blasting area and appear;②optimizing asymmetric unilateral to a free surface conductivity tube plus "cross" V-shaped slash more paragraph a unit dose milliseconds differential between successive initiation blasting network,blasting energy along Baoqu diagonal slash direction dispersion effect and the balance of blasting effect,different from the straight line between and by differential blasting hole millisecond blasting between the holes after the blasting impact effect,vibration on slope hazards;③coupled with piecewise or continuous concentrated charge plus the detonator and the conductance tube detonator expanded anfo explosive hole by hole of milliseconds differential blasting technology in charge more instantaneous detonation,the explosive compression stress peak value along with the loading surface increases the distance to the hole wall down,reduce the excess of the stress wave in rock fragmentation and the blasting effectiveness is more effective. Blasting experiment results show that the key technology used in blasting and the blasting rock block rate is 5%～8% lower,sedimentation height is less than 2 m,blasting energy distribution more uniform,both is advantageous to the security and stability of slope,and convenient for 4 m3 hydraulic backhoe loading,to solve the problem of complex rock deep sunken open pit blasting technology in arid areas are for reference purposes.
-
Keywords:
- complex rock mass /
- V-shaped inclined line /
- blasting network
-
-
期刊类型引用(6)
1. 吴亮，张澳，周俊汝，陈明. 宽孔距爆破模型试验及近场动力学计算研究. 爆破. 2024(01): 1-7 . 
百度学术
2. 周文斌，承财政，杨帆，马京京，陈旭. 数码电子雷管在露天矿爆破中延期时间优化探讨. 爆破. 2024(01): 172-177 . 百度学术
3. 余业清. 某石灰岩矿露天台阶爆破设计及安全分析. 中国矿业. 2024(09): 186-194 . 百度学术
4. 年国辉，周文斌，承财政，康星星，陈旭. 块度识别技术在电子雷管延期时间优化中的应用. 露天采矿技术. 2023(05): 66-69+73 . 百度学术
5. 白晓杰，耿新宇，蔺海洋，董法，春坚超，陈亚军. 非均质复杂岩体深凹露天煤矿爆破参数优选确定. 煤炭技术. 2023(12): 46-49 . 百度学术
6. 周敏，张云鹏，胥国强. 数码雷管露天深孔微差爆破网络数值模拟. 中国矿业. 2021(S2): 261-265 . 百度学术
其他类型引用(1)
下载:
图(6)
计量
- 文章访问数: 108
- HTML全文浏览量: 3
- PDF下载量: 280
- 被引次数: 7
