破碎巖體巷道非對稱破壞與變形規律定量預計與評價

任奮華; 來興平; 蔡美峰; 呂兆海; 鄒磊; 柴鑫; 李立波

doi:10.13374/j.issn1001-053x.2008.03.003

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破碎巖體巷道非對稱破壞與變形規律定量預計與評價

doi: 10.13374/j.issn1001-053x.2008.03.003

任奮華¹,
來興平^2,3,
蔡美峰¹,
呂兆海^2,3,
鄒磊^2,3,
柴鑫^2,3,
李立波^2,3

1. 北京科技大學土木與環境工程學院, 北京 100083;
2. 西安科技大學能源學院, 西安 710054;
3. 教育部西部礦井開采及災害防治重點實驗室, 西安 710054

基金項目:

No.10772144)

陜西省巖層控制重點實驗室重點資助項目(No.04JS19)

國家自然科學基金資助項目(No.10402033

詳細信息

作者簡介:
任奮華(1969-),男,講師,博士

中圖分類號: TD327.2
計量
- 文章訪問數: 211
- HTML全文瀏覽量: 64
- PDF下載量: 4
- 被引次數: 0
出版歷程
- 收稿日期: 2007-09-14
- 修回日期: 2007-10-08
- 網絡出版日期: 2021-08-06

Quantitative prediction and evaluation on the regularity of asymmetric damage and distortion upon broken rock mass roadways

1. School of Civil and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Energy School, Xi'an University of Science and Technology, Xi'an 710054, China;
3. Key Laboratory of Western Mines and Hazard Prevention, Ministry of Education of China, Xi'an 710054, China

摘要

摘要: 在綜合分析區域地質(震)特征、巖體空間變異性特征、開采技術條件和支護模式的基礎上,利用FLAC^3D程序,定量評價了破碎巖體巷道非對稱破壞與變形特征.與現場監測對比分析表明,頂部破碎巖層深度、劣化后的巖體強度以及支護模式的合理性等對巷道巖體破壞的影響比較顯著,錨桿(索)將破碎巖體與深層穩定巖體承接起來共同控制結構穩定性,從而進一步驗證了計算模型的正確性和可行性.工程實踐表明,加固后完整穩定頂部巖體與兩幫煤體共同控制了非對稱載荷作用和煤壁力學強度的劣化,減少了非對稱變形、煤壁擠壓及滑落失穩,進而有效遏制冒頂的發生.
- 破碎巖體 /
- 巷道 /
- 非對稱變形 /
- 數值模擬 /
- 定量預計
Abstract: Based on the comprehensive investigation of characteristics of the regional seismic geology, the spatial variability of rock properties, mining technical conditions and supporting patterns, the deformation and failure modes of broken rock mass roadways were quantitatively analyzed by FLAC^3D numerical modeling. It is shown that the fracture depth in the roof, the strength of fractured rock mass and the rationality of supporting patterns have remarkable influences on the stability of the roadways. The analysis results are good consistent with the field monitoring ones, which indicates that the numerical analysis models are correct. Engineering practice indicated that the co-action of reinforced rock mass in the roof and two wails controlled the influence of asymmetric load and rock strength deterioration in two wails, which led to the reduction in asymmetric deformation, squeezed wall slipping and roof failing of the roadways.
- broken rock-mass /
- roadway /
- asymmetric deformation /
- numerical simulation /
- quantitative prediction and evaluation