唐家會(huì)煤礦61101工作面水害防治分析研究
發(fā)布時(shí)間：2018-09-09 17:06
【摘要】：煤炭是我國(guó)現(xiàn)代化經(jīng)濟(jì)建設(shè)最重要的能源之一,在我國(guó)經(jīng)濟(jì)建設(shè)占據(jù)著重要的地位。而煤礦水害一直是威脅煤礦安全生產(chǎn)的重要原因之一,而承壓水上采煤導(dǎo)致的水害占整個(gè)礦井水害一半以上。唐家會(huì)煤礦主采煤層為6煤,61101工作面為礦井首采工作面,工作面開采面臨頂板砂巖水、底板奧灰水、斷層裂隙水及廢棄巷道采空區(qū)積水綜合作用下回采安全問題。而對(duì)水害分析研究的技術(shù)尚不完善,因此,對(duì)唐家會(huì)61101工作面防治水分析研究及安全性評(píng)價(jià)是很有必要的。本文以唐家會(huì)煤礦61101工作面作為水害防治研究的工程背景,分析了煤層采動(dòng)底板破壞及水害防治方法,并且作了安全性評(píng)價(jià)。研究?jī)?nèi)容取得如下成果在:1、通過對(duì)61101工作面水文地質(zhì)條件的勘察,以及鉆探資料的分析,并且進(jìn)行了物探與鉆探探查方法設(shè)計(jì),作了進(jìn)一步分析研究。獲得了奧灰含水層的富水性特征,底板巖層的阻隔水性能力、厚度及裂隙變化,還有工作面構(gòu)造發(fā)育形態(tài)等情況。2、以唐家會(huì)煤礦DF11斷層周邊開采為工程背景,構(gòu)建了工程地質(zhì)模型,并對(duì)突水危險(xiǎn)性流固耦合模擬研究。通過對(duì)不同落差(5m、10m、15m、和20m)以及不同推進(jìn)距離(30m、90m、120m、150m、210m)采用模擬軟件FLAC3D對(duì)DF11不同傾角斷層、不同破碎帶寬度斷層等影響因素進(jìn)行分析,研究開采過程中覆巖應(yīng)力變化特征、覆巖破壞規(guī)律以及斷層的活化、滲流特征。模擬結(jié)果表明:(1)隨著工作面離斷層的距離越來越近,覆巖所受的剪應(yīng)力和垂向應(yīng)力逐漸增大,但含水層水壓相對(duì)穩(wěn)定,變化較小。(2)隨著斷層傾角的增大,覆巖中所受到的垂向應(yīng)力越來越大,而隨著斷層傾角的增大,覆巖所受的剪應(yīng)力反而越來越小;斷層帶內(nèi)所受的正應(yīng)力隨著工作面的推進(jìn)逐漸增大,同時(shí)隨著斷層傾角的增大逐漸增大;斷層界面的垂向位移隨著斷層傾角增大而增大,在距離不變的情況下,工作面推進(jìn)至斷層時(shí),同一標(biāo)高處上盤界面的滑移量大于下盤界面的滑移量;在距離相同時(shí),煤柱及底板的塑性破壞范圍是隨著斷層傾角減小而增大,可以得出在其他情況相同條件下,覆巖煤柱頂及底板孔隙中的壓力是隨著斷層傾角減小而增大,在距離不變的情況下,工作面推進(jìn)至斷層,地下水流的流速會(huì)逐漸增大,也就是說留設(shè)的煤柱寬度是隨著滲水危險(xiǎn)性增大而增大的。(3)在距離不變的情況下,覆巖中的剪應(yīng)力和覆巖中的垂向應(yīng)力以及斷層中受到的正應(yīng)力都是隨著破碎帶寬度增大而增大;斷層中上盤界面的滑移量受破碎寬度帶作用越大,與之越大。上盤界面的滑移量大于下盤界面的滑移量,其影響范圍及程度也會(huì)增大;可以得出在其他情況相同條件下,覆巖煤柱頂及底板孔隙中的壓力是隨著斷層傾角減小而增大,在距離不變的情況下,工作面推進(jìn)至斷層,地下水流的流速會(huì)逐漸增大,也就是說留設(shè)的煤柱寬度是隨著滲水危險(xiǎn)性增大而增大的。3、進(jìn)行了61101首采工作面安全回采水害影響因素分析,利用導(dǎo)水裂隙帶經(jīng)驗(yàn)公式、突水系數(shù)公式分別對(duì)帶壓開采時(shí)頂板砂巖水、底板奧灰水危險(xiǎn)性程度進(jìn)行了初步評(píng)價(jià),計(jì)算結(jié)果如下:(1)導(dǎo)水裂隙帶高度Hf為227m,所以4煤頂板砂巖及6煤頂板砂巖含水層是首采面頂板充水含水層;(2)突水系數(shù)Ts在0.0263~0.0318 MPa/m,小于臨界突水系數(shù)0.06 MPa/m,所以在底板隔水層完整的情況下,奧灰水突水的可能性很小。4、進(jìn)行了工作面涌水量、礦井涌水量預(yù)計(jì),并結(jié)合周邊礦井防治水經(jīng)驗(yàn),確定了礦井排水能力,為礦井水害防治提供了方法和對(duì)策。論文的研究成果,可為唐家會(huì)煤礦首采工作面實(shí)現(xiàn)安全生產(chǎn)提供了技術(shù)支撐。
[Abstract]:Coal is one of the most important energy sources in China's modern economic construction and occupies an important position in China's economic construction. Coal mine water hazard has always been one of the important reasons threatening the safety of coal mine production. Water hazard caused by mining on confined water accounts for more than half of the whole mine water hazard. In the first mining face of the mine, the mining face faces the safety problems under the combined action of roof sandstone water, floor Ordovician limestone water, fault fissure water and goaf water in abandoned roadway. However, the technology of water hazard analysis is not perfect, so it is necessary to analyze and evaluate the water prevention and control in the 61101 working face of Tangjiahui. Taking 61101 working face of Tangjiahui Coal Mine as the engineering background of water disaster prevention and control research, this paper analyzes the methods of floor damage and water disaster prevention and control in coal seam mining, and makes safety evaluation. The following achievements have been obtained in the study: 1. Through the investigation of hydrogeological conditions in 61101 working face and the analysis of drilling data, geophysical exploration and drilling have been carried out. The water-rich characteristics of the Ordovician limestone aquifer, the water-barrier capacity of the floor rock, the variation of thickness and fissures, and the structural development of the working face are obtained. 2. Taking the mining around the DF11 fault in Tangjiahui Coal Mine as the engineering background, the engineering geological model is constructed and the risk of water inrush is analyzed. Fluid-solid coupling simulation research. By using FLAC3D simulation software to analyze the influence factors of DF11 fault with different dip angle and different fracture bandwidth, such as different drop (5m, 10m, 15m, 20m) and different propulsion distance (30m, 90m, 120m, 150m, 210m), the stress variation characteristics of overburden rock, failure law of overburden rock and fault characteristics during mining are studied. The simulation results show that: (1) with the working face getting closer to the fault, the shear stress and vertical stress of overburden rock increase gradually, but the water pressure of aquifer is relatively stable and changes little. (2) With the increase of the dip angle of fault, the vertical stress of overburden rock increases, but with the increase of the dip angle of fault, the vertical stress of overburden rock increases. On the contrary, the shear stress is getting smaller and smaller; the normal stress in the fault zone increases gradually with the advancing of the working face, and increases gradually with the increasing of the dip angle of the fault; the vertical displacement of the fault interface increases with the increasing of the dip angle of the fault; when the distance is constant, when the working face advances to the fault, the upper wall interface at the same elevation The slip is greater than the slip of the interface of the footwall; when the distance is the same, the plastic failure range of the coal pillar and the floor increases with the decrease of the dip angle of the fault. It can be concluded that under the same other conditions, the pressure in the pore of the roof and the floor of the overburden coal pillar increases with the decrease of the dip angle of the fault, and the working face advances with the distance unchanged. The velocity of groundwater flow increases gradually with the increase of seepage risk. (3) The shear stress in overburden rock, the vertical stress in overburden rock and the normal stress in fault increase with the increase of fracture bandwidth, and the width of coal pillar increases with the increase of seepage risk. The slip of the upper wall interface is larger than that of the lower wall interface, and its influence range and degree will also increase. It can be concluded that under the same other conditions, the pressure in the pore of the roof and floor of overburden coal pillar increases with the decrease of the dip angle of the fault, while the distance remains unchanged. The velocity of groundwater flow will increase gradually when the working face is pushed to the fault, that is to say, the width of coal pillar will increase with the increase of seepage danger. 3. The influencing factors of water disaster in 61101 first mining face are analyzed. The empirical formula of water conduction fracture zone and the formula of water inrush coefficient are used to analyze the roof sandstone water in pressure mining. The dangerous degree of Ordovician limestone water in the floor is preliminarily evaluated, and the results are as follows: (1) The height of water-conducting fracture zone Hf is 227m, so the sandstone aquifer of No. 4 coal roof and No. 6 coal roof is the water-filled aquifer of the first mining face roof; (2) The water inrush coefficient Ts is 0.0263-0.0318 MPa/m, less than the critical water inrush coefficient 0.06 MPa/m, so it is complete in the floor water-proof layer. Under the circumstance, the possibility of water inrush from Ordovician limestone water is very small. 4. The water inrush from working face and mine are predicted, and the drainage capacity of mine is determined according to the experience of surrounding mine water prevention and control. The research results of this paper can provide the technology for realizing safe production in the first mining face of Tangjiahui Coal Mine. Support.
【學(xué)位授予單位】：安徽建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD745
本文編號(hào)：2233034
[Abstract]:Coal is one of the most important energy sources in China's modern economic construction and occupies an important position in China's economic construction. Coal mine water hazard has always been one of the important reasons threatening the safety of coal mine production. Water hazard caused by mining on confined water accounts for more than half of the whole mine water hazard. In the first mining face of the mine, the mining face faces the safety problems under the combined action of roof sandstone water, floor Ordovician limestone water, fault fissure water and goaf water in abandoned roadway. However, the technology of water hazard analysis is not perfect, so it is necessary to analyze and evaluate the water prevention and control in the 61101 working face of Tangjiahui. Taking 61101 working face of Tangjiahui Coal Mine as the engineering background of water disaster prevention and control research, this paper analyzes the methods of floor damage and water disaster prevention and control in coal seam mining, and makes safety evaluation. The following achievements have been obtained in the study: 1. Through the investigation of hydrogeological conditions in 61101 working face and the analysis of drilling data, geophysical exploration and drilling have been carried out. The water-rich characteristics of the Ordovician limestone aquifer, the water-barrier capacity of the floor rock, the variation of thickness and fissures, and the structural development of the working face are obtained. 2. Taking the mining around the DF11 fault in Tangjiahui Coal Mine as the engineering background, the engineering geological model is constructed and the risk of water inrush is analyzed. Fluid-solid coupling simulation research. By using FLAC3D simulation software to analyze the influence factors of DF11 fault with different dip angle and different fracture bandwidth, such as different drop (5m, 10m, 15m, 20m) and different propulsion distance (30m, 90m, 120m, 150m, 210m), the stress variation characteristics of overburden rock, failure law of overburden rock and fault characteristics during mining are studied. The simulation results show that: (1) with the working face getting closer to the fault, the shear stress and vertical stress of overburden rock increase gradually, but the water pressure of aquifer is relatively stable and changes little. (2) With the increase of the dip angle of fault, the vertical stress of overburden rock increases, but with the increase of the dip angle of fault, the vertical stress of overburden rock increases. On the contrary, the shear stress is getting smaller and smaller; the normal stress in the fault zone increases gradually with the advancing of the working face, and increases gradually with the increasing of the dip angle of the fault; the vertical displacement of the fault interface increases with the increasing of the dip angle of the fault; when the distance is constant, when the working face advances to the fault, the upper wall interface at the same elevation The slip is greater than the slip of the interface of the footwall; when the distance is the same, the plastic failure range of the coal pillar and the floor increases with the decrease of the dip angle of the fault. It can be concluded that under the same other conditions, the pressure in the pore of the roof and the floor of the overburden coal pillar increases with the decrease of the dip angle of the fault, and the working face advances with the distance unchanged. The velocity of groundwater flow increases gradually with the increase of seepage risk. (3) The shear stress in overburden rock, the vertical stress in overburden rock and the normal stress in fault increase with the increase of fracture bandwidth, and the width of coal pillar increases with the increase of seepage risk. The slip of the upper wall interface is larger than that of the lower wall interface, and its influence range and degree will also increase. It can be concluded that under the same other conditions, the pressure in the pore of the roof and floor of overburden coal pillar increases with the decrease of the dip angle of the fault, while the distance remains unchanged. The velocity of groundwater flow will increase gradually when the working face is pushed to the fault, that is to say, the width of coal pillar will increase with the increase of seepage danger. 3. The influencing factors of water disaster in 61101 first mining face are analyzed. The empirical formula of water conduction fracture zone and the formula of water inrush coefficient are used to analyze the roof sandstone water in pressure mining. The dangerous degree of Ordovician limestone water in the floor is preliminarily evaluated, and the results are as follows: (1) The height of water-conducting fracture zone Hf is 227m, so the sandstone aquifer of No. 4 coal roof and No. 6 coal roof is the water-filled aquifer of the first mining face roof; (2) The water inrush coefficient Ts is 0.0263-0.0318 MPa/m, less than the critical water inrush coefficient 0.06 MPa/m, so it is complete in the floor water-proof layer. Under the circumstance, the possibility of water inrush from Ordovician limestone water is very small. 4. The water inrush from working face and mine are predicted, and the drainage capacity of mine is determined according to the experience of surrounding mine water prevention and control. The research results of this paper can provide the technology for realizing safe production in the first mining face of Tangjiahui Coal Mine. Support.
【學(xué)位授予單位】：安徽建筑大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD745
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