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| 回采巷道底臌过程研究 | |
| 引用本文： | 王卫军,冯涛,侯朝炯.回采巷道底臌过程研究[J].湖南科技大学学报(自然科学版),2002,17(2):4-8. |
| 作者姓名： | 王卫军 冯涛 侯朝炯 |
| 作者单位： | 1. 湘潭工学院,岩土工程研究所,湖南,湘潭,411201;中国矿业大学,能源学院,江苏,徐州,221008 2. 湘潭工学院,岩土工程研究所,湖南,湘潭,411201 3. 中国矿业大学,能源学院,江苏,徐州,221008 |
| 基金项目： | 湖南省自然科学基金项目资助 (编号 :0 1JJY30 2 0 ) |
| 摘 要： | 分析了回采巷道底臌的发生、发展过程 ,回采巷道的底臌过程是 ,巷道开掘后 ,由于底板岩层由三向应力状态变为二向应力状态 ,岩体释放应变能 ,在应变能释放过程中 ,底板浅部岩层发生离层或破坏 ;回采过程中 ,在二次水平应力作用下发生压曲破坏和峰后蠕变 .回采巷道底臌不仅与底板岩层的力学特性有关 ,还与工作面超前支承压力、两帮变形有关 .图 8,参 5 |
| 关 键 词： | 回采巷道 底臌 支承压力 力学原理 |
| 文章编号： | 1000-9930(2002)02-0004-05 |
| 修稿时间： | 2002年1月21日 |
Study on floor heave course of extraction opening |
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| WANG Wei-jun ,FENG Tao ,HOU Chao-jiong.Study on floor heave course of extraction opening[J].Journal of Hunan University of Science & Technology(Natural Science Editon),2002,17(2):4-8. | |
| Authors: | WANG Wei-jun FENG Tao HOU Chao-jiong |
| Institution: | WANG Wei-jun 1,2,FENG Tao 1,HOU Chao-jiong 2 |
| Abstract: | The development course of the floor heave of extraction opening is studied in this paper. The stress status of floor stratum is changed from three-dimensional stress into two-dimensional stress after the roadway is droved, meanwhile. The floor stratum is separated or fractured because the deformation energy of the strata is released. In the course of extraction, because of the effect of the advancing abutment pressure, the separated rock stratum will be compression-bended and fractured by the second horizontal stress while the roadway sides produce subsidence and horizontal displacement. However, it is important for floor heave that the broken rock produce structure expansion because of peak-residual creep. It is supposed that mechanical character of the floor strata is a main factor leading heave, which the advancing abutment pressure and the deformation of the roadway sides are also relation with it. 8figs.,5refs. |
| Keywords: | extraction opening floor heave abutment pressure mechanical principle |
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