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.

光面爆破是一种广泛应用于岩巷洞室开挖的控制爆破。本课题对光面爆破中岩石的破裂过程进行了分析，明确了光面爆破改进和优化的关键因素。(1)开发了模拟岩石中裂纹动态扩展的计算机程序。利用该程序分析了光面爆破中岩石的破裂过程，阐明了起爆时间精度对破裂过程的影响。(2)通过对比静、动荷载作用下的裂纹扩展过程，明确了岩石动强度与静强度之间的关系。特别指出了微尺度强度的非均匀性导致了动、静强度的差异。(3)研制了用于探测洞室周围岩石损伤的紧凑垂直地震勘探系统（CVSP）。通过现场实测，验证了CVSP系统对隧道周围破坏区深度的评价是有效的。结果表明，高精度起爆系统和CVSP系统是光面爆破优化的有效工具。

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

A.Hirata: "Ispectiopn of danaged zone of tunnel woll by a Compact VSP system"Int.J.Blasting & Fragmentation. 3. 79-94 (1999)

A.Hirata：“通过紧凑型 VSP 系统检查隧道羊毛的危险区域”Int.J.Blasting

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）。