本文選題：西部地區(qū) + 侏羅系含水層�。� 參考：《中國礦業(yè)大學(xué)》2017年碩士論文

【摘要】：本文圍繞我國西部煤炭資源高強(qiáng)度開發(fā)過程中,作為新疆建設(shè)的四大煤炭基地之一的哈密煤炭基地建設(shè)中所面臨的特殊水文地質(zhì)問題,以及對哈密煤田各礦井生產(chǎn)造成的重大影響和嚴(yán)重水害威脅等核心問題,以哈密煤田侏羅系富煤區(qū)的大南湖礦區(qū)為研究區(qū),開展了該富煤地層的控水機(jī)制、介質(zhì)特征、水動力特征及防治水關(guān)鍵技術(shù)等方面的基礎(chǔ)理論研究,并應(yīng)用于大南湖五號井首采面的頂板防治水工作中,主要取得了如下成果:(1)通過野外調(diào)查、水質(zhì)分析、同位素分析等多種手段,系統(tǒng)研究了哈密煤田的區(qū)域水文地質(zhì)條件及沉積演化過程,查明了以哈密煤田大南湖礦區(qū)為代表的天山雪融水為區(qū)域補(bǔ)給源,沙爾湖隆起缺失口為地下水補(bǔ)給通道的隱伏湖床的形成及演變過程,并揭示了在干旱半干旱沙漠地區(qū)隱伏湖床對煤田開采的水文地質(zhì)控制規(guī)律;(2)通過掃面電鏡及壓汞實(shí)驗(yàn)獲取了研究區(qū)侏羅系砂巖含水層的孔隙結(jié)構(gòu)特征,測試表明:III-1含水層的孔隙度平均高達(dá)19.9%,砂巖平均孔隙度達(dá)到18.2%,遠(yuǎn)高于東部石炭-二疊系砂巖的孔隙度(1.1-2%),具有孔隙-裂隙雙重發(fā)育、孔隙度高的介質(zhì)特征,為地下水的賦存和運(yùn)移提供較優(yōu)的介質(zhì)條件;(3)通過開展大型群孔抽水試驗(yàn)及求參,結(jié)合研究區(qū)侏羅系含水層的介質(zhì)特征,采用Boulton模型計算,獲取了研究區(qū)III-1含水層滲透系數(shù)K=4.33 m/d,單位涌水量q=1.18 l/s m,并揭示了該含水層具有的滯后特征及反映出的孔隙-裂隙雙重介質(zhì)發(fā)育的基本規(guī)律。結(jié)合水化學(xué)資料分析,獲取了該含水層具有高滲透性、高礦化度、以靜儲量為主的水文地質(zhì)特征;(4)針對研究區(qū)隱伏湖床補(bǔ)給含水層的介質(zhì)條件、結(jié)構(gòu)特征、控水機(jī)制及流場演化規(guī)律,提出了18煤開采“上防下疏”防治水關(guān)鍵技術(shù),并成功應(yīng)用于首采面生產(chǎn)實(shí)踐。
[Abstract]:This paper focuses on the special hydrogeological problems in the construction of Hami coal base, one of the four major coal bases constructed in Xinjiang, in the process of high-intensity exploitation of coal resources in the western part of China. As well as the key problems such as the great influence and serious water hazard threat caused by the coal mine production in Hami coalfield, the water control mechanism and medium characteristics of the coal-rich strata are carried out in the Dananhu mining area of Jurassic coal rich area of Hami coalfield as the study area. The basic theoretical research on hydrodynamic characteristics and key technologies of water control, and its application to the roof control of the first mining surface of the No. 5 well in Danan Lake, has mainly achieved the following results: 1) through field investigation, water quality analysis, The regional hydrogeological conditions and sedimentary evolution process of Hami coalfield are systematically studied by isotopic analysis, and the Tianshan Xuejingshui, represented by Dananhu mining area of Hami coalfield, is found as the regional recharge source. The formation and evolution of the hidden lake bed with the missing mouth of the Schall Lake uplift is the groundwater recharge channel. The hydrogeological control law of hidden lake bed to coal mining in arid and semi-arid desert area is revealed. The pore structure characteristics of Jurassic sandstone aquifer in the study area are obtained by scanning electron microscope and mercury injection experiment. The test results show that the porosity of the aquifer is as high as 19.9 and the average porosity of sandstone reaches 18.20.It is much higher than that of the eastern Carboniferous Permian sandstone with porosity of 1.1-20.It has the characteristics of dual development of porosity and fissure, and high porosity. Through carrying out large group hole pumping test and obtaining parameters, combining with the characteristics of Jurassic aquifer in the study area, the Boulton model is used to calculate the characteristics of the Jurassic aquifer in the study area, so as to provide a better medium condition for the occurrence and migration of groundwater. The permeability coefficient of the III-1 aquifer K _ (4.33) m / d and the unit water inflow Q ~ (1) ~ (18) l / s ~ (m) are obtained, and the hysteresis characteristics of the aquifer and the basic law of the development of the porosity / fissure dual media are revealed. Based on the analysis of hydrochemical data, the hydrogeological characteristics of the aquifer with high permeability, high mineralization and mainly static reserves are obtained. Based on the mechanism of water control and the evolution of flow field, the key technology of water control in 18 coal mining is put forward, and it is successfully applied to the production practice of the first mining face.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD745

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