發(fā)布時間：2019-06-29 18:04

【摘要】：近幾年來,隨著經(jīng)濟和社會的發(fā)展,我國的建筑行業(yè)和一些基礎(chǔ)設(shè)施行業(yè)飛速發(fā)展,全國各地城市范圍在不斷擴張,高速公路、鐵路在不斷興建,新農(nóng)村建設(shè)在積極開展,所有這些工程的建設(shè)都需要大量的回填材料,然而我國土地資源比較有限,而且城市的擴張和道路的鋪設(shè),更加減少了我國的土地資源。面對越來越緊張的資源危機,政府開始重視我國現(xiàn)存量最大的工業(yè)固體廢棄物資源——煤矸石,并大力支持開發(fā)研究煤矸石資源,將其應用于實際工程。 本文簡單介紹了一些關(guān)于煤矸石的基本特征,總結(jié)前人對煤矸石的介紹,將其簡單分類。在前人對煤矸石研究的基礎(chǔ)上,詳細介紹了煤矸石對我國社會、環(huán)境和人類造成的嚴重污染和危害,以及目前我國對煤矸石的綜合利用情況,說明了研究煤矸石的必要性。 本文以太原煤炭交易中心展覽中心工程為背景,以室內(nèi)試驗的方法對擬用煤礦的煤矸石進行了一系列的物理力學性能試驗。通過化學成分分析試驗,確定了該礦煤矸石中各種礦物質(zhì)含量;采用篩分法進行顆粒級配試驗,確定了煤矸石的顆粒級配特征;通過振動臺試驗,確定了煤矸石的最大干密度;利用大型滲透儀,測定了煤矸石的滲透系數(shù),并進行水穩(wěn)性的判定;采用大型三軸壓縮試驗,確定了煤矸石的本構(gòu)模型參數(shù)等。通過上述一系列試驗,驗證了本文所用煤矸石具有良好的化學性能及工程特性。 在室內(nèi)試驗的基礎(chǔ)上,根據(jù)現(xiàn)場情況,借鑒以往利用煤矸石回填工程的經(jīng)驗,擬定了幾種不同的現(xiàn)場回填施工方案,并且從理論分析的角度出發(fā),利用實用沉降計算方法對幾種不同方案回填后的場地計算其理論沉降量。同時采用大型有限元軟件MIDAS/GTS對擬用煤矸石回填場地進行數(shù)值模擬分析,將三種工況的數(shù)值模擬計算結(jié)果進行分析對比,并將模擬分析結(jié)果和理論計算結(jié)果進行比較。經(jīng)過對比分析驗證了理論計算結(jié)果的正確性,并最終得出最佳施工方案和回填分層厚度,為現(xiàn)場施工提供了比較有參考價值的建議。 本文的研究成果可以作為該工程現(xiàn)場回填方案的擬定和施工的依據(jù)之一,為相關(guān)類型工程提供了理論參考。
[Abstract]:In recent years, with the development of economy and society, the construction industry and some infrastructure industries in our country are developing rapidly, the scope of cities in all parts of the country is expanding, highways and railways are being built, and the construction of new countryside is being carried out actively. All these projects need a lot of backfill materials. However, the land resources of our country are relatively limited, and the expansion of cities and the laying of roads. It has reduced the land resources of our country even more. In the face of more and more tense resource crisis, the government began to attach importance to coal gangue, the largest industrial solid waste resource in China, and strongly supported the development and research of coal gangue resources and applied them to practical projects. In this paper, some basic characteristics of coal gangue are briefly introduced, and the previous introductions of coal gangue are summarized and classified simply. On the basis of previous studies on coal gangue, this paper introduces in detail the serious pollution and harm caused by coal gangue to our society, environment and human beings, as well as the comprehensive utilization of coal gangue in our country at present, and explains the necessity of studying coal gangue. In this paper, based on the exhibition center project of Taiyuan Coal Trading Center, a series of physical and mechanical properties tests of coal gangue to be used in coal mine are carried out by means of laboratory test. Through chemical composition analysis test, the content of various minerals in coal gangue was determined, the particle gradation test was carried out by screening method, the particle gradation characteristics of coal gangue were determined, the maximum dry density of coal gangue was determined by shaking table test, the permeability coefficient of coal gangue was measured by large osmotic instrument, and the water stability was determined. The constitutive model parameters of coal gangue were determined by large triaxial compression test. Through a series of experiments, it is verified that the coal gangue used in this paper has good chemical and engineering properties. On the basis of laboratory test, according to the field situation and drawing lessons from the experience of coal gangue backfill project in the past, several different site backfill construction schemes are worked out, and from the point of view of theoretical analysis, the theoretical settlement of the site after backfilling with several different schemes is calculated by using the practical settlement calculation method. At the same time, the large-scale finite element software MIDAS/GTS is used to simulate and analyze the proposed coal gangue backfill site. The numerical simulation results of the three working conditions are analyzed and compared, and the simulation analysis results are compared with the theoretical calculation results. The correctness of the theoretical calculation results is verified by comparative analysis, and the best construction scheme and backfill layer thickness are finally obtained, which provides valuable suggestions for field construction. The research results of this paper can be used as one of the basis for the formulation and construction of the site backfill scheme of the project, and provide a theoretical reference for the related types of projects.
【學位授予單位】：西安建筑科技大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：U414

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本文編號：2508004