松软煤层综放面顶底板采动应力分布规律研究

凌标灿; 蒋伟; 丁后稳; 廉法宪

松软煤层综放面顶底板采动应力分布规律研究

1.
华北科技学院安全科学技术研究所,北京101601;
2.
北京传媒大学,北京100024;
3.
国投新集能源股份有限公司,淮南232172

详细信息

作者简介:
凌标灿(1966-),男,副教授,主要从事工程地质专业.Email:lingbc@ncist.edu.cn

中图分类号: TD323
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- 被引次数: 0
出版历程
- 收稿日期: 2004-03-25
- 修回日期: 2004-06-03
- 刊出日期: 2005-04-22

DISTRIBUTION OF INDUCED STRESSES IN ROOF AND FLOOR OF THE SEAM BY LONGWALL TOP-COAL CAVING IN SOFT COAL

1.
Facility of Safety Science and Technology, North China Institute of Science and Technology, Beijing 101601;
2.
Beijng Broadcasting Institute, Beijing 100024;
3.
SDIC Xinji Energy Company Limited, Huainan 232172

摘要

摘要: 以某矿综放采场为背景,通过现场实测、相似材料模拟等手段,研究了松软煤层综放开采中液压支架受力状态、两巷单体支柱受力特征和顶底板的采动应力分布规律,结果表明液压支架在工作面不同位置受力状态不同,处于中部位置的支架受力最大,同一支架前立柱受力大于后立柱;风巷围岩应力大于机巷围岩应力,两巷的超前采动应力峰值位置在工作面前3～11m;顶板岩层同一层位中采动应力分布随工作面的距离不同而不同;不同层位应力分布也不同,离煤层越近的岩层中应力集中系数越大;底板岩层在工作面前方6m左右处应力达到最大,在工作面处应力为零。该研究结果有效地指导了该矿井同一煤层综放面巷道布置、两巷支护及工作面顶板管理。
- 综放面 /
- 采动应力 /
- 采动岩体 /
- 支护 /
- 松软煤层
Abstract: With underground measurements and similar material analogy modeling, the authors analyzed distribution of induced stresses in roof and floor of the seam, and the state of hydraulic supports and the single spile. The results show that supports have different sustaining states at different locations, of which the biggest abutment stress is located at the middle part of working face. For the same support, the abutment stress of the front columniation is larger than that of back one. The stress in surrounding rock of the ventilation entry is bigger than that of conveyor entry with a peak value of stress at a distance of 3 to 11 meters from the working face. The mining-induced stress in the same roof strata varies with the distance from the working face, and it also varies from one stratum to another. The larger the stress is, the closer the stratum is located to the coal seam. The largest stress is observed at a distance of 6 meters from the working face, while zero stress is at the working face. This study provides guidelines for design and management of the longwall top-coal caving, entry support and roof control.
- Longwall top-coal caving face /
- Mining stresses /
- Engineering rock mass /
- Support /
- Soft coal

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