圧力を制限する掘削プロセス中の不飽和岩の脆性-柔性移行の音響放射特性
Mingchen Ding1, Mingming He1, Yangping Yao2
1State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, 710048, China.
Ultrasonics
|February 18, 2026
まとめ
この研究では,掘削中の岩石破裂を分析するために,音響放出モニタリングを使用しています. 水の飽和度と圧力の増加は,脆性-柔性への移行に影響を与え,複雑な地質構造の掘削効率に影響を与えます.
科学分野:
- 地質工学エンジニアリング
- ロック・メカニクス ロック・メカニクス
- 掘削技術 掘削技術について
背景:
- 掘削効率は,複雑な地質環境において極めて重要です.
- 従来の掘削監視方法では,放出されるエネルギーを捕捉することができません.
- 音響放射 (AE) 監視は,リアルタイム分析のためのソリューションを提供します.
研究 の 目的:
- 水性岩の脆性-柔らか性の移行メカニズムを分析することによって,掘削効率を向上させる.
- 分析を改善するために,音響放出パラメータを掘削パラメータと統合する.
- 制限圧と水飽和が岩石破裂モードに与える影響を理解する.
主な方法:
- レッドサンドストーンで様々な制限圧力 (4レベル) と飽和度 (3レベル) の下で掘削実験を行った.
- エネルギー放出や故障を分析するために,音響放出モニタリング技術を活用した.
- ブルートル-ダクティルの移行を研究するために,ドリリングのパラメータと相関する音響放出パラメータ.
主要な成果:
- 脆性障害は,摩擦段階では切断段階よりも多く発生しました.
- 制限圧と飽和度の上昇は,一般的に,脆い故障の発生数を減少させた.
- 20MPaまたは100%の飽和度の制限圧は,脆い故障の発生率の増加をもたらし,複雑な相互作用を示唆しました.
- より高い飽和度は,水による岩の劣化による脆性-柔性移行を遅らせました.
- 脆性-柔性移行のための掘削の臨界深さは,飽和度が上昇するにつれて増加した.
結論:
- 水の飽和度と封じ込め圧力は,掘削中の脆性-柔らか性の移行メカニズムに大きな影響を与えます.
- 水によって引き起こされる岩の劣化は,脆性-柔らか性の移行を遅らせ,掘削性能に影響を与える可能性があります.
- 発見は,水分が豊富でストレスにさらされた構造で掘削作業を最適化するためのガイドラインを提供します.
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