本文選題：大斷面　切入點(diǎn)：破碎圍巖　出處：《內(nèi)蒙古科技大學(xué)》2015年碩士論文

【摘要】：隨著我國(guó)現(xiàn)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(hù)難度。尤其是在當(dāng)?shù)V井圍巖條件處于松軟破碎時(shí)，大斷面巷道支護(hù)問題變得更為棘手，冒頂、片幫和底鼓等問題不斷地出現(xiàn)，使得煤礦無(wú)法進(jìn)行安全高效的生產(chǎn)，大斷面巷道破碎頂板圍巖的支護(hù)技術(shù)的不足已成為當(dāng)前阻礙煤礦進(jìn)一步向高產(chǎn)高效發(fā)展的屏障。 本論文以山西潞安集團(tuán)潞寧礦區(qū)某煤業(yè)有限公司5101回風(fēng)順槽巷道支護(hù)問題為工程背景，在對(duì)工程現(xiàn)場(chǎng)充分調(diào)研的基礎(chǔ)上，針對(duì)此礦井生產(chǎn)當(dāng)中所出現(xiàn)的大斷面巷道的支護(hù)問題，通過對(duì)于礦壓，煤巖參數(shù)，頂板離層數(shù)據(jù)等的收集處理采用FLAC3D數(shù)值模擬技術(shù)對(duì)于礦井巷道進(jìn)行科學(xué)系統(tǒng)的分析，提出最佳的優(yōu)化方案，并結(jié)合工業(yè)實(shí)踐對(duì)于支護(hù)工藝進(jìn)行改良，以期達(dá)到最優(yōu)的支護(hù)效果。 通過對(duì)5101回風(fēng)順槽現(xiàn)場(chǎng)實(shí)際觀測(cè)可知，現(xiàn)有支護(hù)雖然基本能夠?qū)崿F(xiàn)對(duì)煤巷的支護(hù)，但頂板離層偏大，給巷道支護(hù)和安全快速掘進(jìn)帶來(lái)很大的困擾，在保證巷道整體穩(wěn)定性的前提下，需要對(duì)錨索的布置方式進(jìn)行調(diào)整，進(jìn)而針對(duì)此問題提出2種不同支護(hù)方案，通過數(shù)值模擬對(duì)比各個(gè)方案的圍巖應(yīng)力、圍巖位移、錨桿及錨索支護(hù)結(jié)構(gòu)受力變形、圍巖塑性區(qū)等變化規(guī)律，并結(jié)合現(xiàn)場(chǎng)實(shí)際情況確定最終支護(hù)方案，試驗(yàn)表明錨桿、錨索、錨網(wǎng)的一體化承載對(duì)圍巖的控制起到很好的效果。 本文對(duì)某煤業(yè)5101回風(fēng)順槽支護(hù)的優(yōu)化設(shè)計(jì)，改良其設(shè)計(jì)方案，不僅提高5101回風(fēng)順槽的掘進(jìn)速度，還對(duì)于實(shí)現(xiàn)煤礦安全生產(chǎn)具有重要的現(xiàn)實(shí)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(hù)關(guān)鍵技術(shù)，既可以對(duì)該類大斷面全煤巷道條件下巷道支護(hù)提供重要的理論與技術(shù)參考，也對(duì)我國(guó)大斷面煤巷技術(shù)的發(fā)展產(chǎn)生實(shí)際的應(yīng)用價(jià)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(xué)位授予單位】：內(nèi)蒙古科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD353

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

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本文編號(hào)：1687583