發(fā)布時間：2018-10-12 06:51

【摘要】：煤矸石即采煤過程和洗煤過程中排出的廢棄物，大量的煤矸石長期露天堆放不加處理，不僅會引發(fā)崩塌、滑坡和泥石流等地質災害，煤矸石中含有的硫還會引發(fā)自燃，產生大量煙塵并釋放出有害氣體，對環(huán)境及人身安全的危害極大。雖然國外對煤矸石山自燃的治理研究開展了大量的研究工作，也取得了很好的效果，但是有些方法也屬于探索階段，且各國煤矸石的成分及物理力學特性不盡相同，地理位置差異很大，不能將國外的治理方法直接應用到我國煤矸石山的治理中。針對煤矸石山煤矸石自燃機理的研究現狀，這方面的研究還沒有形成比較完善的理論研究體系，，目前還處于試驗積累資料階段，同時，對于煤矸石山邊坡穩(wěn)定性問題尚存在諸多難題，因此，對煤矸石山自燃的預防和治理以及山體穩(wěn)定性進行研究是必要的。 根據大量的研究數據和理論成果，探討了煤矸石山自燃的機理與治理方法，結合桑樹坪煤礦煤矸石山綜合治理工程，對自燃治理方法及山體穩(wěn)定性進行了研究。室內和現場試驗表明，采用注漿滅火工藝時，在粘土中添加一定比例的石灰作為注漿滅火材料有較好的滅火效果，得到了粘土與石灰配制的漿液的濃度和控制比例，工程實踐表明漿液具有良好的穩(wěn)定性和流變性，為其它類似煤矸石山自燃治理工程提供了參考。為了準確評價桑樹坪煤矸石山的穩(wěn)定性，利用有限元分析軟件ABAQUS對桑樹坪煤礦煤矸石山的邊坡進行了穩(wěn)定性分析，確定了山體邊坡的潛在滑裂面位置及其對應的最小安全系數，為了保證邊坡的穩(wěn)定性，采用改變邊坡幾何形狀并在滑裂面底部位置修建擋土墻的方法進行加固，有效的提高了山體的安全性。
[Abstract]:Coal gangue is the waste discharged in the process of coal mining and coal washing. If a large number of coal gangue is stored in open air for a long time without treatment, it will not only cause geological disasters such as collapse, landslide and debris flow, but also cause spontaneous combustion of sulfur contained in coal gangue. Produce a large amount of smoke and release harmful gases, to the environment and personal safety of great harm. Although a great deal of research work has been done abroad on the control of spontaneous combustion of coal gangue mountains, and good results have been obtained, some methods are also in the exploratory stage, and the composition and physical and mechanical properties of coal gangue vary from country to country. There is a great difference in geographical location, so it can not be directly applied to the treatment of coal gangue mountain in our country. In view of the present situation of research on the mechanism of spontaneous combustion of coal gangue in coal gangue, the research on this aspect has not yet formed a relatively perfect theoretical research system. At present, it is still in the stage of experimental accumulation of data, and at the same time, There are still many problems in the stability of coal gangue slope. Therefore, it is necessary to study the prevention and treatment of spontaneous combustion of coal gangue mountain and the stability of the mountain body. Based on a large number of research data and theoretical results, the mechanism and treatment methods of spontaneous combustion of coal gangue mountain are discussed. Combined with the comprehensive treatment project of coal gangue mountain in Sangshuping coal mine, the self-combustion treatment method and mountain stability are studied. The laboratory and field tests show that adding a certain proportion of lime to the clay as the grouting material has a better fire extinguishing effect, and the concentration and control ratio of the slurry prepared by the clay and lime are obtained. The engineering practice shows that the slurry has good stability and rheology, which provides a reference for other coal gangue mountain spontaneous combustion treatment projects. In order to evaluate the stability of Sangshuping coal gangue mountain accurately, the stability of the coal gangue mountain slope of Sangshuping coal mine was analyzed by using the finite element analysis software ABAQUS, and the location of the potential slip surface and the corresponding minimum safety factor of the mountain slope were determined. In order to ensure the stability of the slope, the method of changing the geometric shape of the slope and building the retaining wall at the bottom of the sliding crack surface is used to strengthen the slope, which effectively improves the safety of the mountain body.
【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】：2013
【分類號】：TD752.2

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