【摘要】：本論文研究目的是將留巷墻體代替30m寬的保護(hù)煤柱,從而建設(shè)采空區(qū)地下水庫(kù)。在回采結(jié)束后將采空區(qū)垮落空間作為儲(chǔ)水空間,從而分析建設(shè)采空區(qū)地下水庫(kù)的可行性,發(fā)展采空區(qū)地下水庫(kù)的建設(shè)理論和技術(shù)體系。通過(guò)對(duì)采空區(qū)地下水庫(kù)的概念、分類(lèi)方法以及特征的總結(jié),建立以沿空留巷采空區(qū)地下水庫(kù)為基礎(chǔ)的建設(shè)工藝、運(yùn)行系統(tǒng),從而確定采空區(qū)地下水庫(kù)是保護(hù)煤礦地下水資源的有效方法。通過(guò)留巷墻體對(duì)采空區(qū)的有效隔離,形成密閉空間,在工作面回采時(shí),產(chǎn)生的礦井水,可以?xún)?chǔ)存在采空區(qū)地下水庫(kù)內(nèi),從而達(dá)到保水采煤的效果。在沿空留巷技術(shù)思想上,對(duì)留巷墻體進(jìn)行二次開(kāi)發(fā),增加留巷墻體的作用,對(duì)比將煤柱作為煤礦采空區(qū)地下水庫(kù)壩體,此方法提高了煤炭回采率,具有一定的生態(tài)效益和經(jīng)濟(jì)效益。在下水平回采時(shí),通過(guò)對(duì)上水平采空區(qū)地下水庫(kù)間合理調(diào)水,形成水庫(kù)間的調(diào)水系統(tǒng),此調(diào)水系統(tǒng)防止了裂隙貫通上水平老采空區(qū)積水,同時(shí)防止了頂板突水事故。采空區(qū)空間上存在“空-實(shí)-空”的結(jié)構(gòu),通過(guò)對(duì)流經(jīng)采空區(qū)地下水庫(kù)的礦井水進(jìn)行凈化,形成煤礦采空區(qū)地下水庫(kù)的礦井水凈化原理。采用UDEC和FLAC 3D對(duì)上覆巖層下沉運(yùn)動(dòng)狀態(tài)進(jìn)行數(shù)值模擬,通過(guò)對(duì)數(shù)值模擬結(jié)果的分析,得出煤礦采空區(qū)地下水庫(kù)儲(chǔ)水空間的分布規(guī)律是:垮落帶內(nèi)儲(chǔ)水空間呈中間壓實(shí),四周O型圈外圍呈松散分布狀態(tài),裂隙帶內(nèi)儲(chǔ)水空間分布在離層空隙中以及豎向巖體裂隙中,垮落帶內(nèi)儲(chǔ)水空間分布垮落巖體空隙中,垮落帶和裂隙帶巖體空隙共同作為煤礦采空區(qū)地下水庫(kù)儲(chǔ)水空間。通過(guò)建立煤礦采空區(qū)地下水庫(kù)數(shù)學(xué)模型,對(duì)沿空留巷墻體圍堵的采空區(qū)進(jìn)行庫(kù)容計(jì)算,實(shí)現(xiàn)對(duì)采空區(qū)地下水庫(kù)庫(kù)容計(jì)算方法的總結(jié)。基于多因素耦合,建立了沿空留巷煤礦采空區(qū)地下水庫(kù)模型,設(shè)定沿空留巷留巷墻體力學(xué)參數(shù)。以上研究?jī)?nèi)容為煤礦采空區(qū)地下水庫(kù)的建設(shè)提供一套系統(tǒng)的理論,尤其針對(duì)西部干旱、半干旱地區(qū)水資源的保護(hù)具有重要意義。
[Abstract]:The purpose of this paper is to build underground reservoir in goaf instead of 30 m wide coal pillar. After mining, the caving space of goaf is taken as the storage space, and the feasibility of constructing underground reservoir in goaf is analyzed, and the construction theory and technical system of underground reservoir in goaf are developed. By summing up the concept, classification method and characteristics of underground reservoir in goaf, the construction technology and operation system of underground reservoir in goaf along goaf are established. Therefore, it is an effective method to determine the underground reservoir in goaf to protect the underground water resources in coal mines. Through the effective isolation of the wall of the roadway from the goaf, a closed space is formed. The mine water produced when the face is mined can be stored in the underground water reservoir of the goaf, thus the effect of keeping water and mining coal can be achieved. In view of the technical thought of retaining roadway along goaf, the secondary development of retaining wall is carried out to increase the function of retaining wall, and the coal pillar is used as the dam body of underground reservoir in goaf, this method improves the coal recovery rate. It has certain ecological benefit and economic benefit. In the next horizontal mining, the water transfer system between the underground reservoirs in the upper level goaf is formed by reasonable water transfer, which prevents the cracks from running through the old goaf and preventing the roof water inrush accident. There is a structure of "empty, solid and empty" in goaf space. By purifying mine water flowing through underground reservoir in goaf, the principle of mine water purification for underground reservoir in goaf is formed. UDEC and FLAC 3D are used to simulate the subsidence motion of overlying strata. Through the analysis of the numerical simulation results, the distribution law of the water storage space of underground reservoirs in the goaf of coal mine is obtained as follows: the water storage space in the caving zone is intermediate compaction. The surrounding O-ring is loosely distributed, the water storage space in the fissure zone is distributed in the void in the separated layer and in the fracture in the vertical rock mass, and the water storage space in the caving zone is distributed in the voids of the rock mass. Rock mass voids in caving zone and fissured zone are used as water storage space of underground reservoir in goaf of coal mine. By setting up a mathematical model of underground reservoir in goaf, the paper calculates the capacity of goaf which is surrounded by wall along goaf, and summarizes the calculation method of underground reservoir capacity in goaf. Based on the multi-factor coupling, the underground reservoir model of goaf in goaf along goaf was established, and the mechanical parameters of wall along goaf were set up. The above research contents provide a systematic theory for the construction of underground reservoirs in goaf, especially for the protection of water resources in arid and semi-arid areas of western China.
【學(xué)位授予單位】：山東科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TD325.3;TV623

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