Results 51 to 60 of about 184 (98)
Numerical simulation of plant root system stress response to coal mining disturbances in semiarid mining areas [PDF]
Root damage is a critical ecological issue affecting vegetation in semi-arid underground coal mining areas. The mechanisms and influencing factors of root stress damage induced by stress changes in the root-soil layer due to mining-induced rock mass ...
Chuangang GONG +8 more
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Ecological cumulative effects of surface mining areas in semi-arid grasslands: Evaluation model and application [PDF]
The research objectives are to reveal the eco-environmental quality of surface mining areas in semi-arid grasslands, separate the ecological cumulative effects of anthropogenic activities and examine their evolving trends.
He REN +4 more
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Foundation and technology of coordinated utilization of bulk solid waste ‘Three modernizations’ in coal power base [PDF]
The construction of 14 large-scale coal bases and 89 demonstration bases for the comprehensive utilization of bulk solid waste in China marks that the utilization of bulk solid waste in mining areas has been incorporated into the national strategic ...
Denghong CHEN +8 more
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Shuitu Baochi Xuebao, 2017 以鄂尔多斯采煤塌陷区植物的优势种之一黑沙蒿为研究对象，采用伺服式强力机研究其直根的材料力学特性。结果表明：在1～5 mm径级范围内抗拉力、抗折力与根径均呈幂函数正相关，抗拉强度、抗折强度与根径呈幂函数负相关。在拉力和折力分别作用下，直根均表现出弹塑性变形特征，抗拉极限弹性力大于抗折极限弹性力，轴向弹性变形小于径向弹性变形。直根承受径向折力的σ～ε（应力—应变）曲线基本为下凹型，承受轴向拉力时的σ～ε曲线基本为上凸型，对于两种受力形式，极限强度均随根径的增大而减小，极限应变与根径无相关性。1～5 ...
李雪松, 刘, 王, 刘嘉伟, 张, 李
doaj
Internal deformation characteristics and full section monitoring for extremely thick loose layers under mining conditions [PDF]
Mining subsidence represents the primary environmental geological challenge in coal mining, particularly at high water level mining areas in the eastern regions of China.
Pingsong ZHANG +3 more
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Mining-affected water resources and ecological effects in ecologically fragile mining areas of western China [PDF]
The ecologically fragile mining area in the west is an important coal production base in China, and the current scale and intensity of coal mining has far exceeded its environmental carrying capacity, which is very likely to cause irreversible damage to ...
Liqiang YU +4 more
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Shuitu Baochi Xuebao, 2017 为了探索溶磷细菌在复垦土壤上对磷的作用效果，采用室内摇瓶培养的方法，研究了磷细菌及其组合对磷酸三钙的溶解能力，确定了最佳组合磷细菌。拉恩式菌(W2)+荧光假单胞菌1(W3)+荧光假单胞菌2(W4)培养液的有效磷含量最高，为609.1 mg/L，故最佳磷细菌组合为W2+W3+W4。将筛选出的最佳组合磷细菌在采煤塌陷地复垦土壤上进行玉米大田试验，研究其对土壤养分、酶活性、磷解析特性及玉米产量的影响。结果表明：磷细菌可以增加土壤养分含量和改善土壤酶活性；磷细菌处理土壤有效磷和速效钾含量，以及磷酸酶 ...
乔志伟, 洪坚平, 李林轩, 刘
doaj
Shuitu Baochi Xuebao, 2019 为揭示不同复垦年限和培肥措施对采煤塌陷区复垦土壤氮素转化特征影响，分别采用间歇淋洗好气培养法、室内恒温控湿好气培养法和硝酸盐消失法研究了5种培肥措施下复垦4，8年土壤矿化、硝化、反硝化作用规律。结果表明：随复垦年限增加，土壤的矿化量（Nt）和矿化势（N0）均有增加，但土壤矿化率（Nt/N）及矿化势占全氮的比例（N0/N）无明显变化；不同培肥措施下，复垦8年土壤生物有机肥配施化肥处理（MCFB）Nt、N0、Nt/N和N0/N分别较单施化肥处理（CF）提高65.22%，65.21%，60.42%和60.76%
焦欢 +5 more
doaj
Shuitu Baochi Xuebao目的探讨采煤塌陷区地裂缝对土壤水分运移规律的影响，揭示其运移机制，并阐明植被与土壤理化性质在该过程中的调控作用。方法以曹家滩矿区的典型植被［沙蒿（Artemisia desertorum）、早熟禾（Poa annua）、生物结皮］作为研究对象，采用双环入渗仪和微型蒸渗仪，监测不同处理下土壤水分的入渗率和蒸发特征。结合土壤理化性质（体积质量、孔隙度、机械组成等），分析不同植被-土壤系统下地裂缝对水分运移的影响机制。结果1）采动地裂缝对周边土壤水分运移产生显著影响 ...
毕银丽, 白祖诚, 武超
doaj
[Diagnosis and endoluminal treatment of central airway stenosis]. [PDF]
Zhongguo Fei Ai Za Zhi, 2011 Wang H, Zhang H.
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