| 较薄厚煤层综放开采顶煤岩运移破坏特征研究 |
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| 引用本文： | 常聚才,谢广祥,杨科.较薄厚煤层综放开采顶煤岩运移破坏特征研究[J].煤炭科学技术,2008,36(4). |
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| 作者姓名： | 常聚才 谢广祥 杨科 |
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| 作者单位： | 安徽理工大学,煤矿安全高效开采省部共建实验室,安徽,淮南,232001 |
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| 基金项目： | 安徽省教育厅资助项目
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安徽省高校青年教师科研项目
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安徽理工大学校科研和教改项目 |
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| 摘 要： | 采用FLAC3D数值模拟对较薄厚煤层综放开采顶煤岩力学特征进行了系统分析,得出了顶煤岩运移、破坏及应力分布规律.研究结果表明,综放面上部顶煤位移量明显大于工作面中下部,顶煤的"始动点"在工作面煤壁前方,工作面上位顶煤岩的始动位置超前于下位,垂直位移量随着与工作面距离的减小而逐步增加;在综放面前方,顶煤和上覆岩层在垂直方向始终处于压缩状态.而在工作面上方,顶煤开始出现离层现象;工作面支架所受载主要是顶煤和基本顶变形运动产生的变形压力,沿用中厚煤层综采工作面支架设计已不适用综放面.
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| 关 键 词： | 较薄厚煤层 综放开采 顶煤岩运移 |
Research on movement and displacement failure features of top coal and strata in fully mechanized top coal caving mining in thinner thick seam |
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| CHANG Ju-cai,XIE Guang-xiang,YANG Ke.Research on movement and displacement failure features of top coal and strata in fully mechanized top coal caving mining in thinner thick seam[J].Coal Science and Technology,2008,36(4). |
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| Authors: | CHANG Ju-cai XIE Guang-xiang YANG Ke |
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| Affiliation: | CHANG Ju-cai,XIE Guang-xiang,YANG Ke(The Key Lab of Safe , High-efficiency Mining of Ministry of Education,Anhui University of Science , Technology,Huainan 232001,China) |
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| Abstract: | The top coal and strata movement, failure and stress distribution law was obtained from the systematic analysis on the top coal and strata mechanics features of the fully mechanized top coal caving mining in the thinner thick seam with the FLAC3D numerical simulation. The research results showed that the displacement value of the top coal in the fully mechanized top coal caving face was obviously higher than the displacements in the middle and bottom coal. The initial moving point of the top coal was at the... |
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| Keywords: | thinner thick seam fully mechanized top coal caving mining top coal strata movement and displacement |
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