本文選題：礦用充填材料 + 工藝參數(shù)�。� 參考：《山東理工大學(xué)》2015年碩士論文

【摘要】：我國煤炭資源豐富,但是煤炭開采造成的環(huán)境問題和生態(tài)問題越來越突出,基于日漸突出的問題,綠色開采是我國煤炭可持續(xù)發(fā)展的的必經(jīng)之路。本文從充分回收煤炭資源、減少環(huán)境污染和生態(tài)破壞的角度出發(fā),提出了礦用充填材料用于井下充填的課題,并進(jìn)行詳細(xì)研究。礦用充填材料是由粉煤灰、石膏、石灰、水泥、添加劑等材料混合而成,漿體濃度為40%~48%。該材料具有固水性能較大、流動(dòng)性能良好、早期強(qiáng)度較高、膨脹性能適度、長期的穩(wěn)定性等特點(diǎn),是煤礦充填開采的關(guān)鍵技術(shù)。通過對原材料物理化學(xué)性能進(jìn)行測試分析,確定了粉煤灰、水泥、石灰等原材料用于礦山充填的可行性。本文通過試驗(yàn)研究,探討了影響礦用充填材料性能的工藝參數(shù)。充分分析礦用充填材料的水化機(jī)理以及原材料的必要性,在“粉煤灰-石灰-水”體系下進(jìn)行了原材料不同添加量試驗(yàn),確定了礦用充填材料的石膏、石灰、水泥等主要原料的最佳配合比例,使礦用充填材料的抗壓強(qiáng)度等指標(biāo)達(dá)到最佳效果,實(shí)現(xiàn)低成本、高效益的充填技術(shù)。其次,對礦用充填材料強(qiáng)度機(jī)理進(jìn)行探討,并通過X射線衍射分析、掃描電鏡分析和差熱分析方法確定了礦用充填材料強(qiáng)度產(chǎn)生的原因:水化產(chǎn)物鈣礬石、硅酸鈣凝膠、鋁酸鈣凝膠、C-A-S-H凝膠共同作用的結(jié)果。在礦用充填材料配方優(yōu)化的前提下,為了探討其用于井下充填的可行性,對礦用充填材料試件的性能:抗熱、抗凍、膨脹以及抗水滲透等進(jìn)行研究,試驗(yàn)結(jié)果表明礦用充填材料抗熱抗凍和抗水滲透性能良好,符合井下充填要求;具有適度的膨脹性,能夠起到了主動(dòng)支撐采場頂板的作用。以粉煤灰為基料的礦用充填材料可用于井下充填,但對于粉煤灰獲取難度較大的礦山如金屬礦山是否可行,并且能夠利用金屬礦山的廢料優(yōu)勢,最后試驗(yàn)進(jìn)行了風(fēng)積沙、尾砂、赤泥效果應(yīng)用,試驗(yàn)表明將風(fēng)積沙、尾砂、赤泥等材料部分或全部替代粉煤灰,試件齡期28d時(shí),強(qiáng)度分別達(dá)到3.03MPa、2.4MPa、1.35MPa,滿足礦山充填需要,擴(kuò)大了礦用充填材料的應(yīng)用范圍。
[Abstract]:China is rich in coal resources, but the environmental problems and ecological problems caused by coal mining are becoming more and more prominent. Based on the increasingly prominent problems, green mining is the only way for the sustainable development of coal in China. This paper, from the perspective of fully recovering coal resources, reducing environmental pollution and ecological destruction, puts forward the use of mineral filling materials. The mine filling material is made of fly ash, gypsum, lime, cement, additive and other materials. The concentration of slurry is 40%~48%., which has the characteristics of high water retention, good flow performance, high early strength, moderate expansibility and long-term stability. It is a coal mine filling mining. Key technology. Through testing and analyzing the physical and chemical properties of the raw materials, the feasibility of using the raw materials such as fly ash, cement and lime used in mine filling is determined. In this paper, the technological parameters affecting the performance of the filling material are discussed through experimental research. The hydration mechanism of the filling material and the necessity of the raw materials are fully analyzed. Under the system of "fly ash lime water", the experiment of different amount of raw materials was carried out. The optimum matching proportion of the main raw materials such as gypsum, lime and cement was determined to make the best effect on the compressive strength of the mineral filling material and to realize the filling technology with low cost and high benefit. Secondly, the strength of the filling material for mine was strong. The degree mechanism is discussed, and the causes of the strength of the filling material are determined by X ray diffraction analysis, scanning electron microscope analysis and differential thermal analysis. The result of the joint action of hydrated ettringite, calcium silicate gel, calcium aluminate gel and C-A-S-H gel. The feasibility of the backfilling is studied on the properties of the mineral filling material: heat resistance, frost resistance, expansion and water penetration resistance. The results show that the mineral filling material has good resistance to heat and frost resistance and water penetration, which meets the requirements of underground filling, and has a moderate expansibility, and it can play the role of active supporting stope roof. Mine filling material with ash as base material can be used for underground filling, but it is feasible for mine, such as metal mine, which is difficult to get fly ash, and can make use of the advantages of metal mine waste. Finally, the results of wind product sand, tailings and red mud have been applied, and the experiment shows that the materials of wind product sand, tailings, red mud and other materials are completely replaced. The strength of fly ash reaches 3.03MPa, 2.4MPa and 1.35MPa when the specimen age is 28d. It meets the needs of mine filling and expands the application scope of mine filling materials.

【學(xué)位授予單位】：山東理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD823.7

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 李強(qiáng);彭巖;;礦山充填技術(shù)的研究與展望[J];現(xiàn)代礦業(yè);2010年07期

，

本文編號(hào)：1819602