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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:

第33卷

期数:

2011年第04期

页码:

412-415,420

栏目:

水资源与环境

出版日期:

2011-12-15

文章信息/Info

Title:

Study on Environmental Effect of Foundation Backfilled with Coal Gangue

文章编号:

1672-6561(2011)04-0412-04

作者:

李树志; 白国良; 田迎斌

煤炭科学研究总院唐山研究院,河北唐山063012

Author(s):

LI Shu-zhi; BAI Guo-liang; TIAN Ying-bin

Tangshan Branch of China Coal Research Institute, Tangshan 063012, Hebei, China

关键词:

煤矸石; 回填地基; 环境效应; 地下水; 放射性; 污染; 开滦矿区

Keywords:

coal gangue;  foundation backfilled;  environmental effect;  groundwater;  radioactivity;  pollution;  Kailuan mining area

分类号:

X54;X591

DOI:

-

文献标志码:

A

摘要:

为了弄清楚煤矸石回填地基对复垦区的环境效应,以开滦矿区吕家坨复垦新村为例,介绍了地基回填煤矸石工艺,分析了煤矸石化学成分及其含量;采用室内淋溶实验,对pH、总硬度(CaCO₃)、F^-、SO^2-₄、Pb、Cd和Cr⁶⁺浓度等地下水环境质量指标进行分析,探讨了煤矸石回填地基对水环境的影响;讨论了煤矸石回填地基对大气质量的影响;参照《城市放射性废物管理办法》规定,评价了回填地基煤矸石的放射性对人体健康的危害。结果表明:通过现场振动压实试验确定了回填地基分层充填、分层振动压实参数及碾压趟数,确定按照煤矸石与土体积之比5:2进行回填,若回填一层厚500mm煤矸石,则要回填一层厚200mm粉煤灰或土,地表覆土厚度确定为0.5m;煤矸石中SiO₂和Al₂O₃含量较高,属基性岩类,同时煤矸石含有炭、铝和CaO等物质,易发生水解和风化等现象;地基分层回填压实的复垦工艺减少了煤矸石中有害物质的释放量,降低了污染物的迁移速度,不会对水环境造成污染;地基回填煤矸石也显著减少粉尘和有害气体的排放量,降低对大气的污染;研究区煤矸石不属于放射性废物,不会影响人体健康,可作为建筑材料使用。

Abstract:

In order to find the environmental effect of foundation backfilled with coal gangue on the new village construction, taking the new village construction in Lujiatuo of Kailuan mining area as an example, the process of foundation backfilled with coal gangue was introduced; chemical composition and content of coal gangue were measured; the environmental quality indexes of groundwater including pH, total hardness(CaCO₃)and concentration of F^-, SO^2-₄, Pb, Cd and Cr⁶⁺ were measured with the eluviating experiment; effects of foundation backfilled with coal gangue on water and atmosphere environments were discussed; the danger of coal gangue radioactivity to human healthy was evaluated according to Regulations for Radioactive Waste Management. The results showed that through the field vibration compaction test, the layered filling and vibratory compaction parameters and rolling number of foundation backfilled were determined; the reasonable proportion for the volume ratio of coal gangue to soil was 5:2, if gangue with 500 mm thickness was backfilled, then there were flyash or soil with 200 mm thickness above the gangue, and the optimal thickness of surface soil was 0.5 m; the contents of SiO₂ and Al₂O₃ of coal gangue were higher, and the coal gangue belonged to basic rock, and weathering and hydrolysis easily happened because there were carbon, aluminum and CaO in coal gangue; the reclamation process of foundation backfilled in layer and compacted decreased the hazardous substance release from coal gangue, and reduced the transport velocity of contaminant, and there was no significant influence on water environment; foundation backfilled with coal gangue decreased air pollution significantly; the coal gangue as building material was not radioactive waste, and had no adverse effect on human healthy.

参考文献/References:

[1] 惠润堂.煤矸石的环境影响及发生条件[J].煤矿环境保护,2001,15(1):56-58.
[2] 王俊桃,谢 娟,张益谦.矿山废石淋溶对水环境的影响[J].地球科学与环境学报,2006,28(4):92-96.
[3] 李龙清,马彩莲,郭振兴.煤矸石发电项目综合效益评价指标体系构建[J].西安科技大学学报,2011,31(2):132-136.
[4] 刘福东,潘自强,刘森林,等.全国煤矿中煤、矸石天然放射性核素含量调查分析[J].辐射防护,2007,27(3):171-180.
[5] 唐跃刚,常春祥,张义忠.河北开滦矿区煤洗选过程中15种主要有害微量元素的迁移和分配特征[J].地球化学,2005,34(4):366-372.
[6] 唐志新,黄乐亭,戴华阳.采动区煤矸石地基理论研究及实践[J].煤炭学报,1999,24(1):43-47.
[7] 王乐杰.矸石地基回填分层压实处理施工技术[J].矿山测量,2006(3):81-83.
[8] 仝炳炎,卫建军,袁广林,等.煤矸石地基承载力与变形的试验研究[J].西安科技大学学报,2009,29(6):718-721.
[9] Office Water.Economic and Environmental Impact Assessment of Final Effluent Limitations Guidelines and Standards for the Coal Mining Industry-remining and Western Alkaline Subcategories[R].Washington DC:United States Environmental Protection Agency,2001.
[10] Hem J D.Study and Interpretation of the Chemical Characteristics of Natural Water[M].Honolulu:University Press of the Pacific,2005.
[11] 张 辉,张 新,邓寅生.煤矿塌陷区煤矸石复垦及其污染控制试验研究[J].环境卫生工程,2008,16(5):4-6.
[12] GB/T 14848—93,地下水环境质量标准[S].
[13] 陆胜勇,池 涌,严建华,等.初始pH值、液固比对某焚烧炉灰重金属渗滤的影响[J].环境科学学报,2003,23(1):48-52.
[14] 任秀莲.煤矸石中放射性核素对环境的影响评价[J].能源技术与管理,2005(2):52-53.
[15] 国家环境保护总局.城市放射性废物管理办法[S].
[16] GB 6566—2001,建筑材料放射性核素限量[S].
[17] 国家建筑材料测试中心.煤矸石放射性检验报告[R].北京:国家建筑材料测试中心,2008.

相似文献/References:

[1]梁冰,王岩.于家沟地下水反应溶质运移规律数值仿真[J].地球科学与环境学报,2006,28(04):58.
　LIANG Bing,WANG Yan.Simulation for Coal Gangue Leachate Transport in Groundwater in Yujiagou[J].Journal of Earth Sciences and Environment,2006,28(04):58.

备注/Memo

备注/Memo:

收稿日期:2011-01-10
基金项目: “十一五”国家科技支撑计划重点项目(2006BAC09B01)
作者简介: 李树志(1960-),男,河北定州人,工学博士,从事矿山地质灾害评估与土地复垦研究。E-mail:lsz9686@163.com

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更新日期/Last Update: 2011-12-20