Development of VSP Probe for Inspection of Blast Damaged Zone

爆炸损伤区检测用VSP探头的研制

• 批准号: 08555260
• 负责人: KANEKO Katsuhiko
• 金额: $ 3.71万
• 依托单位: HOKKAIDO UNIVERSITY (1997)Kumamoto University (1996)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08555260/
• 关键词: Rock Blasting; Blast-damaged zone; VSP probe; Smooth Blasting; Super-elastic alloy; TiNi alloy; Fracture mechanics; Dynamic fracture; 検層; ボアホール; 発破; 損傷; P波速度

A series of experimental and theoretical investigation for the evaluation ofblast damaged zone has been carried out. Results obtained are as follows.(1) A compact VSP system to evaluate the loosened zone caused by excavation blasting has been developed. A super-elastic alloy plate has been adopted as material for the spring which presses a vibration sensor to the borehole wall with constant force. It is confirmed that the blast-damaged zone around a tunnel can be measured easily and quickly by using the developed system.(2) The fragmentation process of rock in the smooth blasting was analyzed by FEM with taking into account the crack propagation and the effect of delay time accuracy on surface smoothness and remaining rock damage has been clarified. Especially, it is pointed out that the interference of dynamic and/or quasi-static stress fields induced by blasts of adjacent holes plays an important role to control the crack propagation in SB.(3) Induced stress in damaged zone around a tunnel excavated by smooth blasting has been measured by the stress relieving technique. It is confirmed that the smooth blasting using electronic detonators decreases the damaged area in remaining rock.

已经进行了一系列的实验和理论研究，以评估损伤区域的评估。所获得的结果如下。（1）已经开发了一个紧凑的VSP系统，以评估由发掘爆破引起的松动区域。超弹性合金板已被用作弹簧的材料，该弹簧将振动传感器压在井井壁上，并以恒定的力压力。可以证实，通过使用开发的系统，可以轻松，快速地测量隧道周围的爆炸损伤区域。（2）通过FEM分析了平滑爆破中岩石的碎裂过程，并考虑到裂纹的繁殖以及延迟时间准确性对表面平滑度和剩余岩石损伤的影响。尤其是指出，相邻孔的爆炸引起的动态和/或准静态应力场的干扰在控制SB中的裂纹传播中起着重要作用。（3）通过压力宽容技术测量了SB的裂纹在SB造成的隧道中受损区域诱导的压力。可以证实，使用电子雷管的平滑爆破会减少剩余岩石中受损的区域。

项目成果

M.Yamamoto, K.Kaneko, A.Hirata and H.Matsunaga: "Development of smooth blasting design support system based on computor simulation" J.of Japan Explosives Society. Vol.58, No.3. 100-109 (1997)

M.Yamamoto、K.Kaneko、A.Hirata 和 H.Matsunaga：“基于计算机模拟的光滑爆破设计支持系统的开发”J.of Japan Explosives Society。

山本 雅昭: "地山損傷を考慮したスムースブラスティングの設計支援ツール" 火薬学雑誌. 58-3. 100-109 (1997)

Masaaki Yamamoto：“考虑地面损坏的平滑爆破设计支撑工具”《爆炸杂志》58-3 (1997)。

平田篤夫: "トンネル掘進発破によって励起される振動の振動レベル予測法" 火薬学会誌. 58・4. 176-183 (1997)

Atsuo Hirata：“隧道开挖和爆破引起的振动的振动水平预测方法”《炸药学会杂志》58・4（1997）。

山本雅昭: "地山損傷を考慮したスムースブラスティングの設計支援ツール" 火薬学会誌. 58・3. 100-109 (1997)

Masaaki Yamamoto：“考虑地面损坏的平滑爆破设计支撑工具”《炸药协会杂志》58・3（1997）。

平田 篤夫: "トンネル堀進発破によって励起される振動性の振動レベル予測法" 火薬学雑誌. 58-4. 176-183 (1997)

Atsuo Hirata：“隧道爆破激发振动水平的预测方法”《炸药杂志》58-4（1997）。