采空區上覆巖層“三帶”的界定準則和仿真確定

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Dividing guideline and emulating determination of “three zones” of the depressing zones overlying a goal

1. Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China;
2. Beijing Kuangtong Resource Development Consulting Co., Beijing 100037, China;
3. Huajin Coking Coal Company, Lishi 033315, China

摘要: 為了準確劃分采空區上覆巖層的“三帶”范圍,提出了“三帶”的界定準則:將應力超過屈服強度或抗剪強度的巖層高度定為裂隙帶的上限,而將雙向拉應力都超過抗拉強度的巖層高度定為裂隙帶的下限.采用FLAC軟件對礦山進行了界限確定,通過生產實踐中的瓦斯抽放效果進行了驗證,結果表明該界定方法合理有效.此方法可普遍用于采空區上覆巖層的“三帶”劃分.
- 煤 /
- 瓦斯抽放 /
- “三帶”劃分 /
- 數值模擬
Abstract: In order to divide "three zones" of the depressing zones overlying a goal accurately, the guideline to divide the "three zones" is presented:specifying the height of the rock stratum whose stress surpasses the yield or shear strength of itself as the upper bound of the fracture zone, while specifying the height of the rock stratum whose two-way tensile stress both surpasses the tensile strength of itself as the low bound of the fracture zone. FLAC software was used to determine the boundary of a coal mine that was validated by the effect of corresponding methane drainage. The result indicates that the division guideline is rational and useful. This method can be used generally to divide "three zones" of the depressing zones overlying a goaf.
- coal /
- methane drainage /
- "three zones" division /
- numerical simulation