| 李叶鑫,吕刚,王道涵,王双,刘爽,朱肃.排土场土体裂缝特征对土壤物理性质的影响[J].干旱地区农业研究,2022,40(4):214~222 |
| 排土场土体裂缝特征对土壤物理性质的影响 |
| Effects of ground fissure characteristics on soil physical properties in the dump |
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| DOI：10.7606/j.issn.1000-7601.2022.04.24 |
| 中文关键词: 排土场 土壤水分 土体裂缝 土壤机械组成 土壤孔隙状况 饱和导水率 |
| 英文关键词:dump soil moisture ground fissure soil mechanical composition soil pore status saturated hydraulic conductivity |
| 基金项目:国家重点研发计划资助项目（2017YFC1503105）；辽宁省自然科学基金资助项目（20180550447）;沈阳工业大学青年教师科研能力培育基金（200005781） |
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| 中文摘要: |
| 以内蒙古胜利东二号露天煤矿南排土场为研究对象，研究排土场不同土体裂缝区土壤机械组成、孔隙状况、水分空间分布以及饱和导水率的特征和差异。结果表明：3个样地土壤机械组成以砂粒为主，土壤质地为砂质土壤，具有质地疏松、通气透水能力强、蓄水能力差等特点；3个样地土壤容重为1.22~1.45 g·cm-3，且随着土层深度的增加先增大后减小；3个样地土壤含水率偏低，且随着土层深度的增加而减小；土壤饱和含水量、田间持水量和土壤有效水含量呈先减小后增大的变化规律，凋萎系数呈先增大后减小的变化规律，且不同土层之间存在差异。随着土层深度的增加，3个样地各个土层（0~10、10~20、20~30、30~40、40~50、50~60 cm）土壤饱和导水率平均值依次为1.16、1.02、0.95、0.71、0.47、0.27 mm·min-1；土壤饱和导水率与土层深度之间具有较好的幂函数关系。土体裂缝的出现改变土壤容重、孔隙状况和土壤水分空间分布等土壤物理性质，进而影响排土场水分入渗、地表径流及产流产沙等水土流失过程。 |
| 英文摘要: |
| Taking the south dump of the Shengli Dong No. 2 open\|pit coal mine of Datang international power generation company in Xilinhot City, Xilingol League, Inner Mongolia as the research site, the characteristics and differences of soil mechanical composition, pore status, spatial distribution of moisture, and saturated hydraulic conductivity with different ground fissures in the dump were studied. The results indicated that the soil texture in the ground fissures of the dump was sandy soil, which has the characteristics of loose texture, strong air and water permeability, and poor water storage capacity according to the international system of soil particle composition. The soil bulk density with the three plots was 1.22~1.45 g·cm-3, and it first increased and then decreased with the increasing of soil depth. The soil water content with the three plots was low and decreased with the increasing of soil depth. Soil saturated water content, field water holding capacity, and soil available water first decreased and then increased, and the wither coefficient first increased and then decreased, and there were significant differences between different soil layers. The saturated hydraulic conductivity of each soil layer (0~10、10~20、20~30、30~40、40~50、50~60 cm) with the three plots was 1.16, 1.02, 0.95, 0.71, 0.47, and 0.27 mm·min-1, respectively. There was a good power function relationship between the soil saturated hydraulic conductivity and soil depth. The physical properties changed with appearing of ground fissures, such as soil bulk density, pore status, and spatial distribution of soil moisture, which in turn affected soil erosion processes, such as infiltration, surface runoff, and runoff and sediment production in the dump. |
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