摘要
为探究西部风沙区采煤沉陷裂缝对周边表层土壤含水量的影响特征,采用TDR对动态裂缝和边缘裂缝两侧不同距离处的含水量进行了动态精细监测。通过统计分析,确定了动态裂缝和边缘裂缝对周边表层含水量的影响范围和周期。结果表明:在动态裂缝整个发育周期内,裂缝周边表层土壤含水量呈现出一个先下降后上升再小幅度下降又上升的趋势,相对出露侧的含水量损失量普遍大于相对塌陷侧;相对于动态裂缝,边缘裂缝的影响范围和周期更大,但在土壤自修复作用下含水量均能得到恢复。采煤沉陷裂缝对表层土壤含水量影响不大,是短暂的,在较短时间内可实现自修复。
To explore the influence characteristic of mining subsidence fissure on surface soil water content in desert area,the authors took dynamic monitor on water content of different distance in dynamic crack and edge crack.According to analysis,influence range,time and degree of dynamic crack and edge crack on rim soil water content were confirmed.The results showed that within developmental cycle of dynamic fissure,surface soil water content trended to decline firstly,then rise,then go through slow decline,trend to rise at last,and soil water content loss of relative exposed side was larger than relative subsidence side;contrary to dynamic crack,the influence range and time edge crack were larger,but the water content could be recovered by the self-recovered effects.The influence of mining subsidence fissure on surface soil water content was little and shortly,and could achieve self-recovery shortly.
出处
《中国煤炭》
北大核心
2016年第8期113-117,共5页
China Coal
基金
国家自然科学基金委员会一神华集团有限责任公司煤炭联合基金重点支持项目(U1361203)
关键词
风沙区
裂缝
相对出露侧
相对塌陷侧
自修复
wind desert area
fissure
relative exposed side
relative subsidence side
selfrecovery
