本文選題：導(dǎo)水裂縫帶 + 巖層拉伸變形量��； 參考：《西安科技大學(xué)》2017年碩士論文

【摘要】：榆陽礦區(qū)地處毛烏素沙漠南緣,水資源貧乏,且該區(qū)域煤層埋深較淺,煤炭資源的大規(guī)模開發(fā)勢必破壞覆巖含水層及地表水系,從而嚴(yán)重威脅當(dāng)?shù)卮嗳醯纳鷳B(tài)環(huán)境,因此實現(xiàn)該區(qū)域的保水開采已迫在眉睫。針對此現(xiàn)象,論文對榆陽礦區(qū)薛廟灘煤礦覆巖導(dǎo)水裂縫帶發(fā)育機理展開分析研究。論文以榆陽礦區(qū)薛廟灘煤礦為研究對象,通過對薛廟灘煤礦整合區(qū)首采工作面的水文地質(zhì)條件及煤層賦存狀態(tài)分析,給出影響覆巖導(dǎo)水裂縫帶發(fā)育高度的主要因素為覆巖結(jié)構(gòu)、采高和開采尺寸;結(jié)合覆巖連續(xù)變形帶的特征,利用兩段橢圓曲線擬合覆巖下沉曲線的內(nèi)外邊緣,簡化了覆巖層向拉伸變形量的計算方法;以基載比JZ和基采比JC為關(guān)鍵參數(shù)預(yù)判主關(guān)鍵層在“三帶”中的位置,并對隔水土層穩(wěn)定性進行分析,給出不同工況條件下覆巖導(dǎo)水裂縫帶發(fā)育高度的判別流程;運用物理相似模擬、FLAC3D數(shù)值模擬及理論分析,對整合區(qū)首采工作面覆巖導(dǎo)水裂縫帶發(fā)育特征及高度進行研究,確定了薛廟灘煤礦覆巖導(dǎo)水裂縫帶發(fā)育高度為167.21m(即:煤層埋深);同時以關(guān)鍵層對覆巖導(dǎo)水裂縫帶發(fā)育高度的抑制作用為基礎(chǔ),結(jié)合采高和開采尺寸對關(guān)鍵層破斷的影響,給出了覆巖導(dǎo)水裂縫帶的發(fā)育機理。研究成果可為榆陽礦區(qū)及相近地質(zhì)條件下的礦區(qū)進行保水開采提供科學(xué)依據(jù),對礦區(qū)合理開發(fā)利用、生態(tài)環(huán)境及水資源保護具有重要的理論研究意義。
[Abstract]:Yuyang mining area is located in the southern edge of Maowusu Desert, with poor water resources and shallow coal seams. The large-scale exploitation of coal resources is bound to destroy overlying aquifers and surface water systems, thus seriously threatening the local fragile ecological environment. Therefore, it is urgent to realize the exploitation of water conservation in this area. In view of this phenomenon, this paper analyzes and studies the development mechanism of overburden rock conductivity fracture zone in Xuemiaitan coal mine of Yuyang mining area. This paper takes Xuemiaotan coal mine in Yuyang mining area as the research object, through the analysis of the hydrogeological conditions of the first mining face and the occurrence state of coal seam in the integrated area of Xuemiatan coal mine, the main factors affecting the development height of the overburden water conductivity fracture zone are the overburden structure. Mining height and mining size, combined with the characteristics of continuous deformation zone of overburden, two elliptic curves are used to fit the inner and outer edges of overburden subsidence curve, which simplifies the calculation method of overlying strata tensile deformation. Taking the ratio of base to load JZ and the ratio of base to mining JC as the key parameters, the position of the main key layer in the "three zones" is forecasted, and the stability of the impermeable soil layer is analyzed, and the discriminant flow of the development height of the water-conducting fracture zone of overburden rock under different working conditions is given. Based on the numerical simulation and theoretical analysis of physical similarity simulation and FLAC3D, this paper studies the development characteristics and height of the overburden water diversion fracture zone in the first mining face in the integrated area. It is determined that the development height of the overburden water conductivity fracture zone is 167.21 m (that is, the coal seam buried depth), and the influence of mining height and mining size on the breaking of the key layer is based on the inhibition of the critical layer to the development height of the overburden water conductivity fracture zone. The development mechanism of the water-conducting fracture zone of overburden rock is given. The research results can provide scientific basis for water conservation mining in Yuyang mining area and similar geological conditions, and have important theoretical significance for rational development and utilization of mining area, ecological environment and water resources protection.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD74;P641.461

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