摘要
烧变岩含水层是榆神府矿区重要的生态水源。为研究采煤引起的烧变岩水量损失和烧变岩水保护问题,分析了烧变岩的分类、分布特征、水力联系和富水特征,运用数值模拟方法预计了采动引起的烧变岩水量损失,提出了烧变岩水"异地储存"的三种途径。研究表明:烧变岩可分为三大类五小类,烧结岩、类熔岩是主要储水载体;烧变岩分布受地形控制,规模受煤厚、出露高度和自燃条件影响,富水性受补给条件、排泄条件和储水条件决定;烧变岩含水层接受上覆含水层的补给,以泉和矿井疏放水的形式进行排泄;模拟得到需要疏放的烧变岩含水层水量和钻孔布设方案。在总结以往保水采煤经验基础上,提出采用水库储水、采空区储水和地表灌溉三种"异地储存"途径来保护利用烧变岩水资源。
The burnt rock aquifer is an important ecological water resources in Yushenfu mining area. In order to study the water loss and protection of burnt rock, this paper analyzed classification, distribution, hydraulic connection and water enrichment feature of burnt rock. Numerical simulation method was used to predict water loss which caused by mining and then concluding three approaches of ＂offsite storage＂ burnt rock water. The research shows that burnt rock can be divided into 3 categories and 5 small classes, among them sinter rock and similar lava rock are main water stor- age carriers. The distribution of burnt rock is controlled by topography, while the scale is affected by coal seam thick- ness, exposed height and spontaneous combustion conditions. Besides, water abundance of burnt rock is determined by supply condition, excretion condition and water storage condition. The result also shows the burnt rock aquifer is sub- jected to the recharge of the overlying aquifer and excreting by spring and mine drainage. Additionally, draining water quantity and borehole design was summarized by numerical simulation. On the basis of experience of water-preserved mining, three methods could be summarized to protect and utilize water resource of burnt rock, which are reservoir wa- ter storage, goaf water storage and surface water irrigation.
作者
侯恩科
童仁剑
冯洁
车晓阳
HOU En-ke TONG Ren-jian FENG Jie CHE Xiao-yang(School of Geology and Environment, Xi＇ an University of Science and Technology, Xi＇ an 710054, China Modern Coal Mining Technology Research ln- stitute ,Shaanxi Coal and Chemical Technology Institute Co. ,Ltd. ,Xi ＇ an 710065 ,China)
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2017年第1期175-182,共8页
Journal of China Coal Society
基金
国家自然科学基金面上资助项目(41472234)
陕西省社会发展攻关资助项目(2014K13-03)
关键词
烧变岩
保水采煤
地下水数值模拟
采空区储水
异地储存
burnt rock
water-preserved mining
numerical simulation of groundwater
goaf water storage
offsite storage
