本文選題：條帶充填 + 地表沉降��； 參考：《太原理工大學(xué)》2015年碩士論文

【摘要】：充填開采技術(shù)是一種在采出煤層之后，頂板沒有冒落之前，利用充填材料充填采空區(qū)，以減小地表沉降的采礦技術(shù)。由于充填材料一般使用煤矸石、粉煤灰和水泥等，原料易得且成本較低，所以近幾年，充填開采技術(shù)成為煤礦企業(yè)用以控制上覆巖層運動的“三下”開采著重考慮的方法。通過一些煤礦的試用，已經(jīng)證明充填開采技術(shù)能夠有效地減少地表沉降，提高煤炭的資源回收率，同時還可以處理一些廢棄物。 條帶充填開采技術(shù)屬于一種部分充填開采技術(shù)，即對部分采空區(qū)進(jìn)行充填，構(gòu)成間隔的充填條帶，以支撐上覆巖層。與全部充填開采技術(shù)相比，條帶充填開采技術(shù)能夠減少充填體的使用量，降低充填體的成本。由于條帶充填是部分充填，所以其條帶寬度與間距的參數(shù)就直接影響到充填效果，進(jìn)而對地表沉降有所影響。 本文是以曹村煤礦地質(zhì)條件為基礎(chǔ)資料，利用實驗室相關(guān)實驗，測出了該礦煤層頂?shù)装鍘r層的相關(guān)物理力學(xué)參數(shù)。然后利用關(guān)鍵層理論，判定了該礦區(qū)地層中的關(guān)鍵層，并根據(jù)關(guān)鍵層以及破斷距的相關(guān)知識確定了適合該礦地質(zhì)條件的條帶充填體的間距。影響地表沉降的條帶充填體參數(shù)除了條帶充填體的間距，還有寬度、體積模量、剪切模量、密度、內(nèi)摩擦角、粘聚力和抗拉強度。文章中利用灰色關(guān)聯(lián)理論對除條帶充填體間距的其他因素進(jìn)行了分析，確定出了影響曹村煤礦充填開采中，與地表沉降關(guān)系密切的參數(shù)重要度排序，根據(jù)所得序列可知條帶充填體的體積模量、密度和條帶寬度對本礦地表沉降的影響最為關(guān)鍵，從而可以有針對性的進(jìn)行進(jìn)一步的研究。 利用數(shù)值模擬對曹村礦的條帶充填進(jìn)行了相關(guān)模擬，，根據(jù)模擬結(jié)果，分別對曹村礦地表的下沉量、水平移動、傾斜、水平變形和曲率進(jìn)行了分析，從而可知在曹村煤礦特定的地質(zhì)條件下，進(jìn)行充填開采時較佳的充填材料，其體積模量應(yīng)不低于2.34GPa，密度應(yīng)不低于2000kg/m3，充填條帶的合理寬度為35m。
[Abstract]:Filling mining technology is a kind of mining technology which uses filling material to fill the goaf after coal seam is mined and the roof does not fall in order to reduce the surface subsidence.Because coal gangue, fly ash and cement are commonly used in filling materials, the raw materials are easily available and the cost is relatively low, so in recent years, filling mining technology has become the "three-down" mining method to control the movement of overlying strata in coal mining enterprises.Through the trial of some coal mines, it has been proved that the filling mining technology can effectively reduce the surface subsidence, increase the recovery rate of coal resources, and can also deal with some wastes at the same time.Strip filling mining technology belongs to a partial filling mining technology, that is, filling part of goaf, forming interval filling strip to support overlying strata.Compared with the whole filling mining technology, strip filling mining technology can reduce the use of backfill and reduce the cost of backfill.Because the strip filling is partial filling, the parameters of the width and spacing of the strip directly affect the filling effect, and then affect the surface subsidence.Based on the geological conditions of Caocun coal mine, the relevant physical and mechanical parameters of the roof and floor strata of coal seam in this mine are measured by laboratory experiments.Then the key strata in the mining area are determined by using the critical layer theory, and the spacing of the belt filling body suitable for the geological conditions of the mine is determined according to the relevant knowledge of the key layer and the breaking fault.In addition to the spacing of the strip filling, the parameters affecting the surface subsidence include width, volume modulus, shear modulus, density, angle of internal friction, cohesion and tensile strength.In this paper, the grey correlation theory is used to analyze the other factors which affect the spacing of the backfill body except the strip, and the order of the importance of the parameters affecting the filling mining of Caocun coal mine is determined, which is closely related to the surface subsidence.According to the sequence obtained, the influence of the volume modulus, density and strip width of the strip filling body on the surface subsidence of the mine is the most critical, so the further research can be carried out.Based on the simulation results, the subsidence, horizontal movement, tilt, horizontal deformation and curvature of the surface of Caocun Mine are analyzed.Therefore, under the specific geological conditions of Caocun Coal Mine, the best filling material for filling mining should have a volume modulus of not less than 2.34 GPA, a density of not less than 2000kg / m ~ 3, and a reasonable width of 35m.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD823.7

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