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婁   杰¹  ,  孫慶華¹ ,  谷   超^{2 , 3} ,  孫   強²

 

( 1 .  國家能源集團煤焦化有限責任公司 ， 內蒙古 烏海 016000 ;  2.  西安科技大學 地質與環境學院，陜西 西安 710054 ;  3 .  山西大同大學 煤炭工程學院 ， 山西 大同 037003)

摘   要：粉煤灰－水泥漿材因其優良的工程性能在隧道、公路加固 、堵水方面有良好的應用前景。通過測定不同配比粉煤灰－水泥注漿材料的波速、電阻率、T2 譜，研究其在密封狀態下各參數變化特征及演化機理。結果表明：波速、電阻率與齡期呈正相關，含水量反之。隨著水灰比、含水率增大，水化反應程度減小，電阻率、波速呈減小趨勢。粉煤灰摻量增大，1 、7 d 時，粉煤灰對水化反應具有抑制作用，耗水量減小，含水率隨之增大，波速 、電阻率分別與之呈負相關 、正相關；14 、28 d,  粉煤灰活性反應增強，促進了水化反應，0. 5 水灰比注漿材料的電阻率、波速隨粉煤摻量變化趨勢與先前相反，但0.7 、0. 9 水灰比試樣的波速、電阻率隨粉煤 摻量增加分別呈先上升后下降 、先下降后上升的趨勢。研究成果為注漿材料的研發與工程應用提供一定的參考價值。

關鍵詞：粉煤灰 ；核磁 T2  譜 ；波速 ；電阻率

中圖分類號：TU528           

文獻標志碼：A           

文章編號： 1005- 8249   (2024)  05- 0001- 06 

       DOI:10. 19860/j.cnki.issn1005 - 8249.2024.05 .001

 

LOU Jie¹  ,   SUN Qinghua¹  ,   GU  Chao^2 , 3 ,   SUN Qiang²

(1 . National Energy Group Coal Coking Co.，Ltd.，Wuhai 016000, China;2. College of Geology

and Environment ,  Xi ’an University of Science and Technology ,  Xi ’an 710054 , China;

3 . School of Coal Engineering,Shanxi Datong University ,   Datong 037003,China)

Abstract: Because of its excellent engineering performance, fly ash-cement slurry has a good application prospect in the reinforcement and water plugging of tunnels and highways.By measuring the wave velocity, resistivity and T2 spectrum of different proportions of fly-ash cement grouting materials, the variation characteristics and evolution mechanism of each parameter in sealed state were studied. The results indicate that wave velocity and resistivity are positively correlated with age, while water content is inversely correlated. As the water cement ratio and water content increase, the degree of hydration reaction decreases, and the resistivity and wave velocity show a decreasing trend. When the dosage of fly ash increases, at 1 and 7 days, fly ash has an inhibitory effect on hydration reaction, reducing water consumption and increasing water content. Wave velocity and resistivity are negatively and positively correlated with it, respectively. At 14d and 28d, the active reaction of fly ash was enhanced, promoting the hydration reaction. The change trend of the resistivity and wave velocity of the 0.5 water cement ratio grouting material with the addition of fly ash was opposite to before. But for the 0.7 and 0.9 water cement ratio samples, the wave velocity and resistivity showed a trend of first increasing and then decreasing, and then increasing, respectively. The research results provide some reference value for the research and development and engineering application of grouting materials.

Keywords :  fly ash;  nuclear magnetic T2  spectrum;  wave velocity;  resistivity

*基金項目： 國家自然科學基金資助項目  (41972288) 。

作者簡介：婁   杰  (1988—) ,  男 ，碩士，工程師，研究方向：煤礦采掘及防治水、固廢綜合利用。

通信作者：谷   超  (1995—) ,   男 ，博士，助教，研究方向：煤礦地質工程、固廢綜合利用。 

收稿日期：2024-02-02