Optimization of Smooth Blasting

平滑爆破优化

• 批准号: 10450387
• 负责人: KANEKO Katsuhiko
• 金额: $ 6.14万
• 依托单位: HOKKAIDO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450387/
• 关键词: Smooth blasting; Rock fracture; Fracture mechanics; Crack propagation; Rock strength; Seismic prospecting; Damaged area in rock; 最適設計法; 破壊プロセス; き裂; ガス流速; 画像処理

The smooth blasting is a controlled blasting widely used in rock tunnel and cavern excavations. In this research project, the fracture process of rock in the smooth blasting has been analyzed and the key factors for improving and optimizing the smooth blasting is made clear.(1) A computer program to simulate the dynamic crack propagation in rock has been developed. Using this code, the rock fracture process in smooth blasting was analyzed and the influence of initiation time accuracy on the fracture process was clarified.(2) Comparing the crack propagation processes in static and dynamic loading, a relation between the dynamic strength and the static one of rock is made clear. Especially, it is pointed out that heterogeneity of micro-scale strength results in the difference of dynamic and static strengths.(3) The Compact Vertical Seismic Prospecting (CVSP) system to inspect the damaged are in the rock around cavern was developed. From the field measurement, it is confirmed that the CVSP system is useful to evaluate the depth of damaged zone around the tunnel.From these results, it is concluded that the high accurate initiation system and CVSP system are useful tool for optimization of the smooth blasting.

光滑的爆破是一种受控的爆破，广泛用于岩石隧道和洞穴发掘。在该研究项目中，已经分析了平滑爆破中岩石的断裂过程，并明确了改进和优化平滑爆破的关键因素。（1）已经开发了一种计算机程序，以模拟岩石中的动态裂纹传播。使用此代码，分析了平滑爆破中的岩石断裂过程，并阐明了启动时间准确性对断裂过程的影响。（2）比较静态和动态载荷中的裂纹传播过程，动态强度与静态之间的关系岩石之一被清楚。尤其是指出，微尺度强度的异质性导致动态和静态强度的差异。（3）紧凑型垂直地震勘探（CVSP）系统检查了检查受损的岩石在洞穴周围的岩石中。从现场测量中，可以证实CVSP系统可用于评估隧道周围受损区域的深度。从这些结果，可以得出结论，高精确的启动系统和CVSP系统是优化平滑爆破的有用工具。

项目成果

K. Kaneko: "Smooth blasting using high accurate delay detonator"Proc. 8th Int. Cong. ISRM. 2. 1283-1286 (1999)

K. Kaneko：“使用高精度延迟雷管进行平滑爆破”Proc。

A. Hirata: "Inspection of damaged zone of Tunnel wall by a Compact VSP system"Int. J. Blasting & Fragmentation. 3. 79-94 (1999)

A. Hirata：“通过紧凑型 VSP 系统检查隧道壁损坏区域”Int。

M. Yamamoto: "Experimental and Theoretical study on smooth blasting with electronic detonator"Int.J.Blasting & Fragmentation. 3. 3-24 (1999)

M. Yamamoto：“电子雷管光滑爆破的实验与理论研究”Int.J.Blasting

加藤昌治 他: "岩石内マイクロクラックの3次元方位分布の定量的評価法" 資源素材学会誌. 114・12. 909-917 (1998)

加藤正司等：“岩石中微裂纹的三维方向分布的定量评价方法”日本自然资源与材料学会杂志114・12（1998）。

山本雅昭 他: "波動干渉を利用した発破振動の制御方法に関する一考察(第1報)" 火薬学会誌. 59・5. 221-230 (1998)

Masaaki Yamamoto等：“利用波干涉的爆破振动控制方法的研究（首次报告）”日本炸药学会杂志59・5（1998）。