西部风沙区不同采煤沉陷区位土壤水分中子仪监测

发布时间：2017-12-28 05:35

本文关键词：西部风沙区不同采煤沉陷区位土壤水分中子仪监测　出处：《农业工程学报》2016年15期 　论文类型：期刊论文

【摘要】：为探究西部风沙区采煤沉陷对土壤水分的影响,选取大柳塔某工作面为研究对象,采用中子仪法,对沉陷盆地的盆底区、边缘区和未受开采影响的未开采区2 m以内土壤含水量进行为期2 a的定位动态监测(包括采前—采中—采后0.5 a—采后1 a—采后1.5 a—采后2 a)。研究表明:1)研究区2 m内土壤含水量具有明显的分层特征,在10~60 cm内含水量呈线性增加,60~200 cm内基本稳定;2)采煤沉陷对土壤水分的影响具有明显的分区分层特征,使盆底区土壤含水量在10~130 cm内减小,130~200 cm内含水量增加,使边缘区含水量在2 m内均减小;整体而言,对边缘区的影响大于盆底区;3)采后盆底区土壤含水量呈现自我恢复现象,采后1 a土壤含水量便可恢复到采前水平,采后1.5 a和2 a,表现出高于未开采区的特点;边缘区含水量自我恢复效果不明显,采后2 a 10~130 cm土层内仍没达到未开采区的水平。因此,在对西部风沙区采煤沉陷地进行土地复垦和生态修复时,要分区治理,盆底区要充分依靠土壤水分的自我恢复能力,对边缘区要施以人工修复措施,使含水量及时恢复,满足植物生长的需要;这样尽量依靠自然的力量,有针对性、有重点的治理,既可以减小人工修复带来二次扰动的可能性,又可以减少生态修复成本。
[Abstract]:In order to explore the mining subsidence area in west wind effect on soil moisture, selection of Daliuta a working face as the research object, using neutron probe method, the subsidence basin, basin area edge area and is not affected by mining of the mining area not less than 2 m soil moisture for a period of 2 a positioning dynamic monitoring (including before mining mining in mining after 0.5 A - 1 A - postharvest postharvest 1.5 A - 2 a) after harvest. Research shows that: 1) the study area within 2 m soil moisture with hierarchical characteristics, in the 10~60 cm water content increased linearly, the basic stability of 60~200 cm; 2) has obvious characteristics of subarea effect on soil water of mining subsidence, the basin area decreased soil water content at 10 ~130 cm, increased 130~200 cm water content, water content decreased to the edge area within 2 m; the overall effect on the edge area is greater than the pelvic floor area; 3) postharvest pelvic area soil moisture showed a self recovery phenomenon, postharvest 1 a soil moisture content can be restored to the level before harvest, postharvest A and 1.5 2 A, showing higher than non mining areas; fringe water self recovery effect is not obvious, after collecting 2 a 10~130 cm soil layer has not reached the level of non mining areas. Therefore, in the coal mining subsidence in Western Sandy Area of land reclamation and ecological restoration, to partition management, basin area should fully rely on soil moisture self recovery capability, on the fringe to impose artificial restoration measures, the water content of timely recovery, meet the needs of plant growth; so try to rely on the power of nature, there are in view of governance, with emphasis, can reduce the possibility of two repair artificial disturbance, and can reduce the cost of ecological restoration.
【作者单位】：中国矿业大学(北京)土地复垦与生态重建研究所;
【基金】：国家自然科学基金委员会-神华集团有限责任公司煤炭联合基金重点支持项目(U1361203)
【分类号】：S152.7;TD88
【正文快照】： 台晓丽,胡振琪,陈超.西部风沙区不同采煤沉陷区位土壤水分中子仪监测[J].农业工程学报,2016,32(15):225-231.doi:10.11975/j.issn.1002-6819.2016.15.031 http://www.tcsae.orgTai Xiaoli,Hu Zhenqi,Chen Chao.Monitoring soil moisture at different subsidence areas of min

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