本文選題：檸條塔井田　切入點：采空區(qū)積水量　出處：《西安科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：在多煤層開采中,上部煤層采空區(qū)積水會嚴重威脅下部煤層的安全回采。如何準確預(yù)測一定時間間隔后采空區(qū)積水量就成為生產(chǎn)上急需解決的一大難題。本文以檸條塔井田為研究對象,建立地下水三維數(shù)值模型,采用數(shù)值模擬等方法分別對井田北翼N1205工作面和南翼S1224工作面采空區(qū)積水量進行預(yù)測研究,探討采空區(qū)積水量的預(yù)測方法。在總結(jié)檸條塔井田礦井地質(zhì)、水文地質(zhì)和采礦資料的基礎(chǔ)上,對采空區(qū)積水條件進行了分析,認為采用自然垮落法管理頂板的綜采工作面采空區(qū)積水主要受充水水源、充水通道和積水空間三個因素影響。檸條塔井田采空區(qū)積水的水源主要由煤層頂板砂巖裂隙水構(gòu)成,其次是大氣降水、地表水體和松散含水層水。充水通道為導(dǎo)水冒裂帶,經(jīng)過計算得出2-2煤層導(dǎo)水冒裂帶發(fā)育至基巖層中,但在考考烏素溝,石峽溝等溝谷處可以貫通地表。檸條塔煤礦采空區(qū)積水空間實際是采空區(qū)密閉墻泄水孔以下冒落巖塊間空隙的體積。根據(jù)檸條塔井田南翼和北翼所處的水文地質(zhì)單元,將南翼地層概化為風積砂和薩拉烏蘇組潛水含水層、離石組和保德組相對隔水層、導(dǎo)水裂隙帶以上原基巖層、導(dǎo)水裂隙帶層和2-2煤層采空區(qū),共5個結(jié)構(gòu)層。將北翼地層概化為保德組和離石組相對隔水層、導(dǎo)水裂隙帶以上原基巖層、導(dǎo)水裂隙帶層和2-2煤層采空區(qū),共4個結(jié)構(gòu)層。據(jù)此概化地質(zhì)模型,利用地下水模擬軟件(GMS)建立了南翼和北翼的地下水數(shù)值模型。對采空區(qū)積水量預(yù)測所涉及的有關(guān)概念進行了定義,包括采空區(qū)積水巖體、積水空間、積水速度、積滿水時間和積水量等參數(shù),給出了這些參數(shù),尤其是采空區(qū)積水量的預(yù)計方法。對檸條塔煤礦北翼N1205和南翼S1224工作面采空區(qū)積水量進行了預(yù)測,結(jié)果為:N1205工作面全密閉采空區(qū)積水空間為892125m3,可泄水采空區(qū)積水空間為41179m3,積水速度為9.33m3/h,全密閉采空區(qū)積滿水需10.91年,可泄水采空區(qū)積滿水需0.51年,全密閉采空區(qū)積水量為892125m3,可泄水采空區(qū)積水量為41179m3。S1224工作面全密閉采空區(qū)積水空間為1003353m3,可泄水采空區(qū)積水空間為35624m3,積水速度為124.65m3/h,全密閉采空區(qū)積滿水需0.91年,可泄水采空區(qū)積滿水需11.91天,全密閉采空區(qū)積水量為1003353m3,可泄水采空區(qū)積水量為35624m3。該預(yù)測結(jié)果與實際比較符合,說明該方法可以推廣應(yīng)用。
[Abstract]:In the multi-seam mining, Water accumulation in the goaf of the upper coal seam will seriously threaten the safe mining of the lower coal seam. How to accurately predict the amount of water stored in the goaf after a certain time interval has become a big problem that needs to be solved in production. This paper takes Caragana tower mine field as the research object. Three dimensional numerical model of groundwater is established, and the method of numerical simulation is used to predict the amount of water stored in the goaf of N1205 face and S1224 face in the north wing of the mine field. On the basis of summarizing geological, hydrogeological and mining data of Caragana korshinskii, the conditions of water accumulation in goaf are analyzed. It is considered that the water accumulation in goaf of fully mechanized mining face is mainly affected by water source, water filling passage and water accumulation space by natural caving method. The water source in the gob area of Caragana Tower is mainly composed of sandstone fissure water on top of coal seam. The second is atmospheric precipitation, surface water body and loose aquifer water. The channel of water filling is water conduction and fracture zone. By calculation, it is found that the water conductivity crack zone of 2-2 coal seam develops into bedrock, but in the Caokowusu ditch, The space of water accumulation in the goaf of Caragana Tower coal mine is actually the volume of the void between the caved rock blocks under the closed wall discharge hole in the goaf. According to the hydrogeological units in the south and north flanks of Caragana Tower mine field, The strata in the south wing are generalized to eolian sand and Sarawusu submersible aquifer, relative water-isolated layer of Lishi formation and Baode formation, original bedrock layer above water-conducting fracture zone, water-conducting fissure zone and 2-2 coal seam goaf. In this paper, the north wing strata are divided into four layers, namely, the relative water-isolated layer of Baode formation and Liishi formation, the original bedrock layer above the water-conducting fissure zone, the water-conducting fissure zone and the goaf of 2-2 coal seam. The numerical models of groundwater in the south and north wing are established by using the groundwater simulation software (GMS). The related concepts involved in the prediction of water accumulation in the goaf are defined, including the rock mass in the goaf, the space of water accumulation, the velocity of water accumulation, and so on. The parameters such as the time of water accumulation and the amount of water accumulated are given, especially the method of predicting the amount of water stored in the goaf, and the amount of water accumulated in the goaf of the North Wing N1205 and the South Wing S1224 face of Caragana Tower Coal Mine is forecasted. The results showed that the water accumulation space in the closed goaf of the working face was 892125m3, the water accumulation space in the emptying goaf was 41179m3, the water accumulation speed was 9.33m3 / h, the total closed goaf needed 10.91 years to accumulate water, and the drain goaf needed 0.51 years to fill the goaf. The amount of water accumulated in the completely closed goaf is 892125m3, the amount of water accumulated in the emptying goaf is 41179m3.S1224 working face, the water space of the fully closed goaf is 1003353m3, the water space of the emptying goaf is 35624m3, the speed of water accumulation is 124.65m3 / h, the water accumulation of the fully closed goaf needs 0.91-year. It takes 11.91 days to accumulate water in the emptying goaf, 1003353m3 m ~ 3 in the completely closed goaf and 35624m ~ 3 m ~ 3 in the emptying goaf. The prediction result is in good agreement with the actual situation, which shows that the method can be popularized and applied.
【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】：TD745.2

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