CAJ | 학술논문

针对当前矿用水泥封孔材料中膨胀剂的膨胀能效发挥不足，会导致瓦斯抽采过程中封孔材料干缩漏气的现象，基于微胶囊缓控释放原理和材料“膨胀－强度协调发展”机理，运用微胶囊复合技术制得微胶囊UEA膨胀剂。借助SEM、XRD等测试手段，详细研究了几组水泥浆的膨胀性能。结果表明，基准组发生体积收缩；膨胀剂未处理组膨胀率峰值和终值较低；潮湿环境处理组膨胀能损失较大；微胶囊处理组具有延迟膨胀现象，较未处理膨胀剂组延迟2.5h，膨胀率终值较膨胀剂未处理组和潮湿环境处理组分别提高3.33‰和11.06‰。
침대당전광용수니봉공재료중팽창제적팽창능효발휘불족，회도치와사추채과정중봉공재료간축루기적현상，기우미효낭완공석방원리화재료“팽창－강도협조발전”궤리，운용미효낭복합기술제득미효낭UEA팽창제。차조SEM、XRD등측시수단，상세연구료궤조수니장적팽창성능。결과표명，기준조발생체적수축；팽창제미처리조팽창솔봉치화종치교저；조습배경처리조팽창능손실교대；미효낭처리조구유연지팽창현상，교미처리팽창제조연지2.5h，팽창솔종치교팽창제미처리조화조습배경처리조분별제고3.33‰화11.06‰。
Currently, the expansion energy efficiency of expansion agent for hole sealing cement in coal mine is in-sufficient, and it causes the phenomenon of dry shrinkage and leakage in hole sealing material during the gas ex-traction process.Based on the principle of slowly controlled release of microcapsule and the"coordinated develop-ment of expansion-strength"mechanism of hole sealing material, the microcapsule composite technology was ap-plied to prepare the microcapsule UEA expansion agent.By using the test methods of SEM and XRD, the expan-sion properties of several groups of cement slurry were studied in detail.The results showed that the volume con-traction happened in benchmark group, the peak value and final value of expansion rate were lower in untreated a-gent group, and the loss of expansion energy was larger in damp environment treated group.The microcapsule trea-ted group had the phenomenon of delayed expansion, the delayed time was 2.5 h compared with the untreated ex-pansion agent group, and the final value of expansion rate increased by 3.33‰ and 11.06‰ respectively than those of untreated expansion agent group and damp environment treated group.