直接引力条件下における結合炭の機械的および微小破裂特性に関するDEMシミュレーション研究
Herui Zhang1, Enyuan Wang1, Jianhua Yue2
1School of Safety Engineering, China University of Mining and Technology, Xuzhou, 221008, China.
Scientific reports
|August 21, 2025
まとめ
ベッディング平面の角度は,石炭岩の引力強さと故障モードに大きく影響します. より高い角度は 張力強度を増やし 亀裂パターンを変化させ 岩石の破裂行動に影響します
科学分野:
- 地理工学
- ロック・メカニクス
- 計算モデリング
背景:
- 岩石の破裂は鉱山での重大な危険であり,しばしば引力裂けが形成されます.
- 床の平面の方向性は,石炭岩の機械的行動と故障モードに影響を与える重要な要因です.
研究 の 目的:
- 床の平面の浸透角度が石炭岩の牽引力に及ぼす影響を調査する.
- 数値シミュレーションを使用して,異なるベッディング角度での故障メカニズムとマイクロメカニカルストレスの転送を分析する.
主な方法:
- PFC2D (2次元粒子フローコード) による数値シミュレーションを使用した.
- 0°,30°,60°,90°の4つの異なるベッド平面の角度を持つモデルを開発した.
- 張力強度,弾性モジュール,故障パターン,およびストレス転送メカニズムを分析した.
主要な成果:
- 張力および弾性モジュールは,張力強度がより高い感度を示すベッディング角度の増加と正に相関する.
- 断裂パターンは,引力切断複合材料の断裂 (0°) から床面に沿った切断断裂 (30°),切断主導の並列割れ (60°),多方向ネットワーク (90°) に移行する.
- マイクロメカニカル分析は,負荷軸の優位性から,ベッディングの角度が増加する複雑なマトリックス-ベッディングの相互作用へのストレス転送メカニズムのシフトを明らかにした.
結論:
- ベッディング平面の方向性は,引力強度,故障モード,および石炭岩の亀裂の拡散を制御する重要なパラメータです.
- 地下発掘における岩石の破裂リスクの予測と緩和には 角度依存の行動を理解することが不可欠です
- 数学的シミュレーションは,張力下での層岩質の複雑な微力学的反応について貴重な洞察を提供します.
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