本文選題：大斷面　切入點：破碎圍巖　出處：《內蒙古科技大學》2015年碩士論文

【摘要】：隨著我國現代化礦井不斷發(fā)展，使得巷道斷面尺寸不斷加大，大斷面巷道的增加更增加了巷道的支護難度。尤其是在當礦井圍巖條件處于松軟破碎時，大斷面巷道支護問題變得更為棘手，冒頂、片幫和底鼓等問題不斷地出現，使得煤礦無法進行安全高效的生產，大斷面巷道破碎頂板圍巖的支護技術的不足已成為當前阻礙煤礦進一步向高產高效發(fā)展的屏障。 本論文以山西潞安集團潞寧礦區(qū)某煤業(yè)有限公司5101回風順槽巷道支護問題為工程背景，在對工程現場充分調研的基礎上，針對此礦井生產當中所出現的大斷面巷道的支護問題，通過對于礦壓，煤巖參數，頂板離層數據等的收集處理采用FLAC3D數值模擬技術對于礦井巷道進行科學系統(tǒng)的分析，提出最佳的優(yōu)化方案，并結合工業(yè)實踐對于支護工藝進行改良，以期達到最優(yōu)的支護效果。 通過對5101回風順槽現場實際觀測可知，現有支護雖然基本能夠實現對煤巷的支護，但頂板離層偏大，給巷道支護和安全快速掘進帶來很大的困擾，在保證巷道整體穩(wěn)定性的前提下，需要對錨索的布置方式進行調整，進而針對此問題提出2種不同支護方案，通過數值模擬對比各個方案的圍巖應力、圍巖位移、錨桿及錨索支護結構受力變形、圍巖塑性區(qū)等變化規(guī)律，并結合現場實際情況確定最終支護方案，試驗表明錨桿、錨索、錨網的一體化承載對圍巖的控制起到很好的效果。 本文對某煤業(yè)5101回風順槽支護的優(yōu)化設計，改良其設計方案，不僅提高5101回風順槽的掘進速度，還對于實現煤礦安全生產具有重要的現實意義。研究大斷面全煤巷道條件下巷道的變形破壞規(guī)律及其支護關鍵技術，既可以對該類大斷面全煤巷道條件下巷道支護提供重要的理論與技術參考，也對我國大斷面煤巷技術的發(fā)展產生實際的應用價值。
[Abstract]:With the continuous development of modern mines in China, the size of roadway section is increasing, and the increase of large-section roadway makes the support of roadway more difficult, especially when the surrounding rock condition of mine is soft and broken. The problem of large section roadway support becomes more intractable. The problems of roof fall, cover and bottom drum appear constantly, which makes the coal mine unable to carry out safe and efficient production. The shortage of supporting technology of broken roof surrounding rock in large section roadway has become a barrier to the further development of high yield and high efficiency in coal mines. In this paper, based on the engineering background of the roadway support problem of 5101 return wind in Luning Coal Industry Co., Ltd, Lu'an Group, Shanxi Lu'an Group, on the basis of full investigation on the site of the project, In view of the support problem of large section roadway in this mine production, through the collection and treatment of mine pressure, coal and rock parameters, roof data and so on, the FLAC3D numerical simulation technology is used to carry on the scientific and systematic analysis to the mine roadway. The best optimization scheme is put forward and the support technology is improved in combination with industrial practice in order to achieve the best support effect. Through the field observation of the 5101 return wind trench, it can be seen that although the existing support can basically realize the coal roadway support, the roof separation layer is on the large side, which brings great troubles to the roadway support and the safe and fast driving. On the premise of guaranteeing the overall stability of roadway, it is necessary to adjust the arrangement of anchor cable, and then to solve this problem, two different support schemes are put forward, and the surrounding rock stress and displacement of each scheme are compared by numerical simulation. The stress deformation and plastic zone of surrounding rock of anchor rod and anchor cable support structure are changed, and the final supporting scheme is determined in combination with the actual situation in the field. The test results show that the integrated bearing capacity of anchor rod, anchor cable and anchor wire mesh plays a good role in the control of surrounding rock. In this paper, the optimized design of the 5101 return air trench support in a coal industry is improved, which not only increases the driving speed of the 5101 return air trench, but also improves the design scheme. It is also of practical significance to realize the safety production of coal mine. The deformation and failure law of roadway under the condition of large section coal roadway and its supporting key technology are studied. It can not only provide important theoretical and technical reference for roadway support under the condition of this kind of large-section coal roadway, but also produce practical application value for the development of large-section coal roadway technology in China.
【學位授予單位】：內蒙古科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TD353

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相關期刊論文 前1條

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本文編號：1687583