压实强度对煤矸石山覆盖材料空气阻隔性的影响
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摘要
为研究煤矸石山构建覆盖层过程中相关的碾压方法及参数,结合阳泉三矿煤矸石山治理现场条件,以粉土及粉煤灰作为试验材料,通过室内模拟测试土样在不同压实强度作用下的空气阻隔性,分析压实强度对材料阻燃效果的影响及规律,探讨自燃煤矸石山综合治理中碾压强度对覆盖层阻隔功能产生的效应,给出最优的碾压强度。结果表明:压实强度影响材料的空气渗透速度,二者之间呈负指数函数关系;随压实强度增加,材料的空气阻隔性逐渐增大,单位体积压实功从50 kJ/m3增加到300 kJ/m3时,平均渗透率从1.22×10-13m2降到2.17×10-15m2;不同压差下空气渗透速度随单位体积压实功变化的曲线有一个特征点,压差为2~10 kPa时,最有效的单位体积压实功在100~150 kJ/m3。
In order to study the related rolling compaction method and parameters in the covering layer building process of the coal rejects dumping pile,in combination with the site conditions of the coal rejects dumping pile control in Yangyquan No. 3 Mine,based on the powder soil and fly ash applied as the test material,an indoor simulation was applied to measure and test the air barrier property of the samples under the different compaction strengths. The paper analyzed the compaction strength affected to the fire resistance effect of the material and discussed the rolling strength in the comprehensive control of the spontaneous combusted coal rejects dumping pile affected to the barrier function effect of the covering layer. An optimal rolling strength was provided. The results showed that the compaction strength would affect the air seepage velocity of the material and there was a negative index function relationship between the compaction strength and the material. With the compaction strength increased,the air barrier property of the material would be steadily increased. When the compaction power per unit volume was increased from 50 kJ / m3to 300 kJ / m3,the average permeability would be reduced from 1.22 ×10-13m2to 2. 17 × 10-15m2. Under the different pressure difference,there was a characteristic point in the curve of the permeability velocity varied with the compaction function. When the pressure difference was 2 ~ 10 kPa,the most effective compaction power of the unit volume was 100 ~ 150 kJ / m3.
In order to study the related rolling compaction method and parameters in the covering layer building process of the coal rejects dumping pile,in combination with the site conditions of the coal rejects dumping pile control in Yangyquan No. 3 Mine,based on the powder soil and fly ash applied as the test material,an indoor simulation was applied to measure and test the air barrier property of the samples under the different compaction strengths. The paper analyzed the compaction strength affected to the fire resistance effect of the material and discussed the rolling strength in the comprehensive control of the spontaneous combusted coal rejects dumping pile affected to the barrier function effect of the covering layer. An optimal rolling strength was provided. The results showed that the compaction strength would affect the air seepage velocity of the material and there was a negative index function relationship between the compaction strength and the material. With the compaction strength increased,the air barrier property of the material would be steadily increased. When the compaction power per unit volume was increased from 50 kJ / m3to 300 kJ / m3,the average permeability would be reduced from 1.22 ×10-13m2to 2. 17 × 10-15m2. Under the different pressure difference,there was a characteristic point in the curve of the permeability velocity varied with the compaction function. When the pressure difference was 2 ~ 10 kPa,the most effective compaction power of the unit volume was 100 ~ 150 kJ / m3.
引文
[1]于桂芬,杨亚平,崔焱森.潞安集团煤矸石山边坡生态治理工程技术:以王庄煤矿为例[J].中国水土保持,2010(10):66-68.
[2]张爱青.大同矿区煤矸石山自燃防治及高效灭火技术[J].洁净煤技术,2010,16(1):110-112,31.
[3]陈永峰.阳泉矿区煤矸石自燃防治研究[D].西安:西安建筑科技大学,2005.
[4]韩小林,张子虎,张弘弛.晋城古书院矿区自燃煤矸石山灭火治理及植被实践[J].能源环境保护,2005(5):39-40.
[5]贾宝山,韩德义.红阳三矿新煤矸石山自燃的预防措施[J].煤矿安全,2004,35(6):13-15.
[6]武丽敏.国外煤矸石处理利用与煤矸石山自燃控制[J].煤矿环境保护,1994,8(6):24-26.
[7]胡振琪,李鹏波,张光灿.煤矸石山复垦[M].北京:煤炭工业出版社,2006.
[8]HU Zhen-qi.Revegetation Potential of Coal Wastes Piles in Northern China[J].International Journal of Surface Mining and Reclamation,1993,7(3):105-108.
[9]Fredlund D G,Xing A,Huang S.Predicting the Permeability Function for Unsaturated Soils Using the Soil-water Characteristic Curve[J].Can Geotech,1994,31(4):533-546.
[10]Paige G B,Hillel D.Comparison of Three Methods for Assessing Soil Hydraulic Properties[J].Soil Science,1993,155(3):175-189.
[11]侍倩,曾亚武.岩土力学实验[M].武汉:武汉大学出版社,2006.
[12]王永焱,林在贯.中国黄土的结构特征及物理力学性质[M].北京:科学出版社,1990:173-213.
[13]邵明安,王全九.土壤物理学[M].北京:高等教育出版社,2006.
[14]黄昌勇.土壤学[M].北京:中国农业出版社,2000.
[15]林成功,吴德伦.土层透气性现场实验与分析[J].岩土力学,2003,24(4):579-582.
[16]李小勇,谢康和,虞颜.太原粉质粘土强度指标概率特征[J].浙江大学学报,2001,35(5):492-496.
[17]康学毅.干贮灰场粉煤灰物理力学性质及碾压试验[J].电力勘测设计,2004(9):13-17.
[18]Springer D S,Loaiciga H A,Cullen S J,et al.Air Permeability of Porous Materials Under Cont Rolled Laboratory Conditions[J].Ground Water,1998,36:558-565.
[2]张爱青.大同矿区煤矸石山自燃防治及高效灭火技术[J].洁净煤技术,2010,16(1):110-112,31.
[3]陈永峰.阳泉矿区煤矸石自燃防治研究[D].西安:西安建筑科技大学,2005.
[4]韩小林,张子虎,张弘弛.晋城古书院矿区自燃煤矸石山灭火治理及植被实践[J].能源环境保护,2005(5):39-40.
[5]贾宝山,韩德义.红阳三矿新煤矸石山自燃的预防措施[J].煤矿安全,2004,35(6):13-15.
[6]武丽敏.国外煤矸石处理利用与煤矸石山自燃控制[J].煤矿环境保护,1994,8(6):24-26.
[7]胡振琪,李鹏波,张光灿.煤矸石山复垦[M].北京:煤炭工业出版社,2006.
[8]HU Zhen-qi.Revegetation Potential of Coal Wastes Piles in Northern China[J].International Journal of Surface Mining and Reclamation,1993,7(3):105-108.
[9]Fredlund D G,Xing A,Huang S.Predicting the Permeability Function for Unsaturated Soils Using the Soil-water Characteristic Curve[J].Can Geotech,1994,31(4):533-546.
[10]Paige G B,Hillel D.Comparison of Three Methods for Assessing Soil Hydraulic Properties[J].Soil Science,1993,155(3):175-189.
[11]侍倩,曾亚武.岩土力学实验[M].武汉:武汉大学出版社,2006.
[12]王永焱,林在贯.中国黄土的结构特征及物理力学性质[M].北京:科学出版社,1990:173-213.
[13]邵明安,王全九.土壤物理学[M].北京:高等教育出版社,2006.
[14]黄昌勇.土壤学[M].北京:中国农业出版社,2000.
[15]林成功,吴德伦.土层透气性现场实验与分析[J].岩土力学,2003,24(4):579-582.
[16]李小勇,谢康和,虞颜.太原粉质粘土强度指标概率特征[J].浙江大学学报,2001,35(5):492-496.
[17]康学毅.干贮灰场粉煤灰物理力学性质及碾压试验[J].电力勘测设计,2004(9):13-17.
[18]Springer D S,Loaiciga H A,Cullen S J,et al.Air Permeability of Porous Materials Under Cont Rolled Laboratory Conditions[J].Ground Water,1998,36:558-565.