| 井工煤矿开采对坡面形态及侵蚀的影响研究 |
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| 引用本文： | 柳宁,赵晓光,周文富,袁治程.井工煤矿开采对坡面形态及侵蚀的影响研究[J].煤炭工程,2020,52(3):122-126. |
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| 作者姓名： | 柳宁 赵晓光 周文富 袁治程 |
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| 作者单位： | 西安科技大学 |
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| 基金项目： | 国家自然科学基金(41402308);陕西省教育厅专项科研计划项目(17JK0507)。 |
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| 摘 要： | 井工煤矿开采会引起围岩移动、地表形态改变，间接造成坡面侵蚀。基于大佛寺煤矿采采矿条件和土壤侵蚀特点，研究了黄土层厚度对采煤沉陷区不同坡形坡面形态及侵蚀的影响。利用FLAC3D 数值模拟软件对采煤引起的地表变形进行仿真模拟计算，结果表明井下采煤必然会引起坡面坡度增加、坡长减小，坡面侵蚀模数及径流模数增大，大于100m的黄土层厚度能有效控制坡面坡度增加、坡长的减小、坡面侵蚀模数和径流模数的增大。增大黄土层厚度，坡面侵蚀增大量由大到小对应的自然坡型排序为：直线坡、凸坡、凹坡、混合坡，且增大黄土层厚度，对于控制直线坡坡面形态和坡面侵蚀的影响更为有效。
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| 关 键 词： | 井工开采 坡面形态 坡面侵蚀 黄土层厚度 不规则坡 |
| 收稿时间： | 2019-05-07 |
| 修稿时间： | 2019-07-05 |
Study on the effect of coal mining on slope morphology and erosion |
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| LIU Ning,ZHAO Xiao-guang,ZHOU Wen-fu,YUAN Zhi-cheng.Study on the effect of coal mining on slope morphology and erosion[J].Coal Engineering,2020,52(3):122-126. |
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| Authors: | LIU Ning ZHAO Xiao-guang ZHOU Wen-fu YUAN Zhi-cheng |
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| Affiliation: | (College of Geology and Environment,Xi'an University of Science and Technology,Xi’an 710054,China) |
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| Abstract: | Underground coal mining causes surrounding rock movement,changes the surface morphology,and indirectly leads to slope erosion.Based on the mining conditions and soil erosion characteristics of Dafosi Coal Mine,the influence of loess layer thickness on the slope morphology and erosion in coal mining subsidence area are studied with the loess layer thickness and slope type as variables.FLAC3D is used to simulate the mining-induced surface deformation,the results show that underground coal mining will inevitably lead to slope increase,slope length decrease,slope erosion modulus and runoff modulus increase,when loess layer thickness is greater than 100 m,the slope changes can be controlled.Under the increased loess layer thickness,slope erosion increment of different natural slope types ranks from large to small as follows:linear slope>convex slope>concave slope>mixed slope,and loess layer thickness increasing is more effective in controlling the linear slope morphology and slope erosion. |
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| Keywords: | underground coal mining slope morphology slope erosion loess layer thickness irregular slope |
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