本文選題：奧陶系灰?guī)r　切入點(diǎn)：阻水能力評(píng)價(jià)　出處：《西安科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：煤炭資源的需求與日俱增,華北型煤田的淺部和上組煤已經(jīng)被開采的日漸匱乏,其深部和下組煤的開采在許多煤礦已經(jīng)成為發(fā)展的必然選擇。開采下組煤的難題,除了頂部采空區(qū)的透水災(zāi)害外,煤層底板突水才是最嚴(yán)重的癥結(jié)所在。為了解決這個(gè)難題,一般采用的方法是進(jìn)行工作面或者區(qū)域注漿,加固底板的阻水能力;或人工疏導(dǎo)降壓,對(duì)于奧灰頂部風(fēng)化殼的天然阻水能力并沒有給予重視并利用。事實(shí)上,古地殼運(yùn)動(dòng)后奧灰頂界面經(jīng)歷了長(zhǎng)時(shí)間的風(fēng)化剝蝕和侵蝕,形成了一些溶蝕孔洞和裂隙,但經(jīng)過(guò)眾多因素的影響,這些巖溶空間被黏土等弱透水性物質(zhì)充填,并經(jīng)過(guò)上覆巖層的壓實(shí)作用,形成了具有天然阻水能力的巖層。因此,對(duì)其進(jìn)行的研究意義重大。本文以陜西韓城桑樹坪煤礦為工程背景,針對(duì)奧灰頂部巖層展開阻水能力分析與試驗(yàn)研究,主要內(nèi)容如下:1、分析了礦區(qū)的基礎(chǔ)地質(zhì)、水文地質(zhì)資料和區(qū)域地下水、井田下組煤底板主要含水層(奧陶系灰?guī)r含水層)的含、阻水條件,認(rèn)為區(qū)域內(nèi)奧陶系頂部灰?guī)r可以作為相對(duì)阻水層,并定義了本文的研究段厚度。2、結(jié)合地質(zhì)背景資料和構(gòu)造發(fā)育理論,對(duì)奧陶系頂部進(jìn)行綜合研究,得出了奧灰頂部阻水能力的指標(biāo)體系,包括巖性組合及結(jié)構(gòu)、地質(zhì)構(gòu)造、鉆孔巖芯采取率、沖洗液消耗量、充填壓實(shí)程度和阻水厚度指標(biāo)。3、運(yùn)用ArcGIS軟件與AHP法結(jié)合,通過(guò)確定阻水性指標(biāo),繪制各指標(biāo)專題圖,計(jì)算各指標(biāo)權(quán)重并進(jìn)行專題圖疊加,建立反映各種指標(biāo)因素對(duì)其產(chǎn)生的疊加影響的評(píng)價(jià)模型,這個(gè)模型所得出的計(jì)算值能更直觀反映出奧灰頂部的阻水能力。4、運(yùn)用分級(jí)地圖上常用的自然分級(jí)法,結(jié)合礦井生產(chǎn)實(shí)踐,對(duì)其進(jìn)行分級(jí)得出相應(yīng)的閾值,并得到了研究區(qū)阻水能力分區(qū),其評(píng)價(jià)結(jié)果與其構(gòu)造分布呈一定相關(guān)性。通過(guò)地質(zhì)構(gòu)造跟鉆孔數(shù)據(jù)對(duì)所得的阻水能力分區(qū)進(jìn)行工程驗(yàn)證,效果比較理想。
[Abstract]:The demand for coal resources is increasing day by day, and the shallow and upper coalfields in North China type coal field have been increasingly scarce. The deep and lower coal mining has become an inevitable choice for development in many coal mines. In addition to the percolation disaster in the top goaf, the most serious problem lies in the water inrush from the coal seam floor. In order to solve this problem, the common method is to carry out grouting in the face or area to strengthen the water resistance capacity of the floor. Or artificial depressurization, the natural water resistance of the weathering crust at the top of Ordovician ash is not paid attention to and utilized. In fact, the interface of the top of the Ordovician ash experienced weathering, denudation and erosion for a long time after the paleocrustal movement. Some dissolution holes and fissures have been formed, but through the influence of many factors, these karst spaces are filled with weak permeable materials such as clay, and through the compaction of the overlying strata, the rock layers with natural water resistance are formed. This paper takes Sangshuping Coal Mine in Hancheng, Shaanxi Province as the engineering background, and carries out the analysis and experimental study on the water-blocking capacity of the top layer of Ordovician ash. The main contents are as follows: 1. The basic geology of the mining area is analyzed. Hydrogeological data and regional groundwater, main aquifer of coal floor (Ordovician limestone aquifer) in the coal mine field, and water blocking condition, it is considered that the limestone at the top of the Ordovician in the region can be regarded as the relative water barrier layer. The thickness of the study section. 2 is defined in this paper. Combined with the geological background data and the theory of structural development, a comprehensive study of the top of the Ordovician is carried out, and the index system of the water resistance capacity of the top of the Ordovician is obtained, including the lithologic assemblage and structure, geological structure, etc. Taking rate of borehole core, consumption of flushing fluid, filling compaction degree and water resistance thickness index .3.Using ArcGIS software and AHP method, by determining water resistance index, drawing thematic map of each index, calculating weight of each index and superimposing thematic map. An evaluation model reflecting the superposition effect of various index factors on it is established. The calculated values obtained by this model can more directly reflect the water blocking capacity of the top of Ordovician ash. The natural classification method commonly used on the classified map is used. Combined with the practice of mine production, the corresponding threshold value is obtained by classifying it, and the area of water blocking capacity of the study area is obtained. The result of evaluation is related to the distribution of the structure, and the effect is satisfactory through the engineering verification of the water blocking capacity by geological structure and borehole data.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD745;P641.461

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 武強(qiáng);賈秀;曹丁濤;梁永平;;華北型煤田中奧陶統(tǒng)碳酸鹽巖古風(fēng)化殼天然隔水性能評(píng)價(jià)方法與應(yīng)用[J];煤炭學(xué)報(bào);2014年08期

2 張偉杰;李術(shù)才;魏久傳;張慶松;張霄;車宗原;王剛;;巖溶泉域煤礦奧灰頂部相對(duì)隔水性及水文地質(zhì)特征研究[J];巖石力學(xué)與工程學(xué)報(bào);2014年02期

3 羅成;;GIS的AHP型脆弱性指數(shù)法在李雅莊礦底板突水評(píng)價(jià)中的應(yīng)用[J];煤田地質(zhì)與勘探;2012年05期

4 繆協(xié)興;白海波;;華北奧陶系頂部碳酸巖層隔水特性及分布規(guī)律[J];煤炭學(xué)報(bào);2011年02期

5 王金艷;黃永林;譚慧明;蔣新;;利用ArcGIS生成水系密度的方法[J];地理空間信息;2010年06期

6 武強(qiáng);楊柳;朱斌;李建民;洪益清;劉伯;戚春前;趙文德;馬榮;;“脆弱性指數(shù)法”在趙各莊礦底板突水評(píng)價(jià)中的應(yīng)用[J];中國(guó)煤炭地質(zhì);2009年06期

7 董書寧;劉其聲;;華北型煤田中奧陶系灰?guī)r頂部相對(duì)隔水段研究[J];煤炭學(xué)報(bào);2009年03期

8 吳振嶺;沈智慧;;煤層底板突水危險(xiǎn)性評(píng)價(jià)中奧灰含水層的阻水作用分析[J];煤礦安全;2009年02期

9 楊天鴻;唐春安;譚志宏;朱萬(wàn)成;馮啟言;;巖體破壞突水模型研究現(xiàn)狀及突水預(yù)測(cè)預(yù)報(bào)研究發(fā)展趨勢(shì)[J];巖石力學(xué)與工程學(xué)報(bào);2007年02期

10 毛節(jié)華,許惠龍;中國(guó)煤炭資源分布現(xiàn)狀和遠(yuǎn)景預(yù)測(cè)[J];煤田地質(zhì)與勘探;1999年03期

，

本文編號(hào)：1588338