半干旱矿区地裂缝对土壤水分和地表剪切强度的影响

发布时间：2018-05-26 00:23

  本文选题：地裂缝 + 土壤含水率　； 参考：《生态与农村环境学报》2016年02期

【摘要】：为研究矿区地裂缝对土壤水分及地表剪切强度的影响规律,针对井工煤矿采煤产生的沉陷裂缝,通过野外现场试验,对垂直裂缝方向上的土壤含水率和地表剪切强度进行测定并进行相关性分析。结果表明,在沿垂直裂缝的方向上土壤含水率与测点距裂缝的距离之间呈一定的正相关关系,相关性未达显著水平(P0.05),初步得到土壤平均含水率随距地裂缝距离的增加而增大,地裂缝的出现一定程度上降低了裂缝及其周边土体含水率;地表剪切强度与距地裂缝距离之间呈一定的正相关关系,相关性未达显著水平(P0.05),初步得到地裂缝对周围土体结构产生一定影响,即距地裂缝越近,剪切强度越低,地裂缝的出现降低了地裂缝及其周边土体的剪切强度。
[Abstract]:In order to study the influence of ground fissures on soil moisture and surface shear strength in mining area, a field test was carried out to study the subsidence fractures produced by coal mining in well workings. The soil moisture content and the surface shear strength in the vertical fracture direction were measured and the correlation analysis was carried out. The results showed that there was a positive correlation between soil moisture content and the distance between the measured point and the crack along the vertical fracture direction, and the correlation was not significant (P 0.05). The preliminary results showed that the average soil moisture content increased with the increase of the distance from the ground fissure. The occurrence of ground fissures reduces the moisture content of the fracture and its surrounding soil to a certain extent, and there is a positive correlation between the surface shear strength and the distance from the ground fracture. The correlation is not significant (P0.05), and it is found that ground fissures have a certain influence on the surrounding soil structure, that is, the closer to the ground fissures, the lower the shear strength, and the occurrence of the ground fissures reduces the shear strength of the ground fissures and the surrounding soil mass.
【作者单位】： 中国矿业大学环境与测绘学院;
【基金】：国家科技基础性工作专项(2014FY110800) 国家自然科学基金重点项目(U1361214) 国家重点基础研究发展计划(2013CB227904)
【分类号】：S157
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本文编号：1935231