河北天成煤礦岳城水庫下采煤安全影響研究
發(fā)布時間：2018-11-06 11:09
【摘要】：我國的煤炭資源亟待開發(fā),但大量的煤炭資源被壓在鐵路、水體、建筑物下面。據(jù)不完全統(tǒng)計(jì),僅統(tǒng)配煤礦生產(chǎn)礦井的“三下”壓煤就高達(dá)數(shù)百億噸,可供10個年產(chǎn)1000萬噸的特大型礦井生產(chǎn)上百年。對于很多煤炭企業(yè)來說,隨著地表淺層煤炭資源的整體枯竭,“三下”壓煤的開采還關(guān)系著企業(yè)的生存命脈。本文的研究對象河北省天成煤礦主要采區(qū)位于岳城水庫地表水體以下,是典型的地表水體下采煤問題。本文研究的核心是天成煤礦在水庫下采煤的安全性問題,主要包括兩方面內(nèi)容:大壩安全運(yùn)行問題即采煤引起地表移動是否會傳播到大壩;煤礦安全開采問題即由于采煤引起的導(dǎo)水裂隙帶發(fā)育是否會導(dǎo)通地表水體。本文在充分調(diào)查礦區(qū)地質(zhì)、水文地質(zhì)及采煤工藝的條件下,圍繞“大壩安全”、“采煤安全”這兩條主要思路,研究取得以下主要成果:(1)根據(jù)概率積分法計(jì)算地表移動,地表最大沉陷值2.97m,主要影響半徑530m,地面沉陷位移達(dá)10mm的點(diǎn)距壩基圍護(hù)線的最小值約為2528m;根據(jù)FLAC3D數(shù)值模擬計(jì)算地表移動,地表最大沉陷值2.98m,主要影響半徑526m,地表移動影響半徑范圍距壩基圍護(hù)線的最小值約為2532m。(2)根據(jù)《三下規(guī)程》經(jīng)驗(yàn)公式計(jì)算導(dǎo)水裂隙帶發(fā)育高度,其發(fā)育高度為52.4m;根據(jù)相關(guān)文獻(xiàn)對《三下規(guī)程》經(jīng)驗(yàn)公式修正,一次采全高的導(dǎo)水裂隙帶一般為分層開采的1.5倍左右,據(jù)此推算其發(fā)育高度大約為80m;根據(jù)經(jīng)驗(yàn)倍數(shù)法計(jì)算導(dǎo)水裂隙帶發(fā)育高度,其發(fā)育高度約為81m;根據(jù)工程類比法計(jì)算導(dǎo)水裂隙帶發(fā)育高度,其發(fā)育高度約為68.9m;根據(jù)FLAC3D數(shù)值模擬計(jì)算導(dǎo)水裂隙帶發(fā)育高度,煤礦整體開采完成后導(dǎo)水裂隙帶最終發(fā)育高度為90m。(3)綜上,天成煤礦庫下采煤時,地表移動不會波及到大壩從而對大壩的安全運(yùn)行造成影響;煤層上覆基巖柱高度大于導(dǎo)水裂隙帶高度與保護(hù)層厚度之和,導(dǎo)水裂隙帶不會導(dǎo)通地表水體,岳城水庫水體不會潰入地下對天成煤礦安全開采造成影響。
[Abstract]:China's coal resources need to be developed urgently, but a large number of coal resources are pressed under railways, water bodies and buildings. According to incomplete statistics, the "three lower" compaction coal in the coal mine is as high as tens of billions of tons, which can be produced for more than 100 years in 10 super large coal mines with an annual output of 10 million tons. For many coal enterprises, with the whole depletion of surface shallow coal resources, the mining of "Sanxia" coal still relates to the survival of enterprises. The main mining area of Tiancheng Coal Mine in Hebei Province is below the surface water body of Yuecheng Reservoir, which is a typical mining problem under surface water body. The core of this paper is the safety of coal mining under reservoir in Tiancheng coal mine, which mainly includes two aspects: whether the surface movement caused by coal mining will spread to the dam; The problem of coal mine safe mining is whether the development of water conduction fissure zone caused by coal mining will lead to surface water body. Under the condition of fully investigating the geology, hydrogeology and coal mining technology of the mining area, this paper studies the following main achievements: (1) calculating the surface movement according to the probability integration method, focusing on the two main ideas of "dam safety" and "coal mining safety". The maximum subsidence value is 2.97m, the main radius of influence is 530m, and the minimum value of the point distance from 10mm to the retaining line of dam foundation is about 2528m. According to the FLAC3D numerical simulation, the surface movement is calculated, the maximum subsidence value is 2.98 m, and the main influence radius is 526 m. The minimum value from the radius of influence of surface movement to the retaining line of dam foundation is about 2532m.2.According to the empirical formula of "three rules", the development height of the water-conducting fissure zone is calculated, and the development height is 52.4 m; According to the revision of the empirical formula of "Sanxiaji" according to the related literature, the water-conducting fracture zone of the first mining height is generally about 1.5 times of that of the stratified mining, and the development height is estimated to be about 80 m. According to the empirical multiple method, the development height of the water-conducting fissure zone is about 81 m, and the development height of the water conduction fissure zone is about 68.9 m according to the engineering analogy method. According to the FLAC3D numerical simulation, the development height of the water-conducting fissure zone is calculated, and the final development height of the water-conducting fissure zone after the completion of the whole mining is 90 m. (3) when the coal mining is under the reservoir of Tiancheng coal mine, the final development height of the fissure zone is 90 m. The surface movement will not affect the safe operation of the dam. The height of the overlying bedrock column is greater than the sum of the height of the water-conducting fissure zone and the thickness of the protective layer, the water-conducting fissure zone will not lead to the surface water body, and the water body of Yuecheng Reservoir will not collapse into the ground, which will have an impact on the safe mining of Tiancheng Coal Mine.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD823.8
本文編號：2314094
[Abstract]:China's coal resources need to be developed urgently, but a large number of coal resources are pressed under railways, water bodies and buildings. According to incomplete statistics, the "three lower" compaction coal in the coal mine is as high as tens of billions of tons, which can be produced for more than 100 years in 10 super large coal mines with an annual output of 10 million tons. For many coal enterprises, with the whole depletion of surface shallow coal resources, the mining of "Sanxia" coal still relates to the survival of enterprises. The main mining area of Tiancheng Coal Mine in Hebei Province is below the surface water body of Yuecheng Reservoir, which is a typical mining problem under surface water body. The core of this paper is the safety of coal mining under reservoir in Tiancheng coal mine, which mainly includes two aspects: whether the surface movement caused by coal mining will spread to the dam; The problem of coal mine safe mining is whether the development of water conduction fissure zone caused by coal mining will lead to surface water body. Under the condition of fully investigating the geology, hydrogeology and coal mining technology of the mining area, this paper studies the following main achievements: (1) calculating the surface movement according to the probability integration method, focusing on the two main ideas of "dam safety" and "coal mining safety". The maximum subsidence value is 2.97m, the main radius of influence is 530m, and the minimum value of the point distance from 10mm to the retaining line of dam foundation is about 2528m. According to the FLAC3D numerical simulation, the surface movement is calculated, the maximum subsidence value is 2.98 m, and the main influence radius is 526 m. The minimum value from the radius of influence of surface movement to the retaining line of dam foundation is about 2532m.2.According to the empirical formula of "three rules", the development height of the water-conducting fissure zone is calculated, and the development height is 52.4 m; According to the revision of the empirical formula of "Sanxiaji" according to the related literature, the water-conducting fracture zone of the first mining height is generally about 1.5 times of that of the stratified mining, and the development height is estimated to be about 80 m. According to the empirical multiple method, the development height of the water-conducting fissure zone is about 81 m, and the development height of the water conduction fissure zone is about 68.9 m according to the engineering analogy method. According to the FLAC3D numerical simulation, the development height of the water-conducting fissure zone is calculated, and the final development height of the water-conducting fissure zone after the completion of the whole mining is 90 m. (3) when the coal mining is under the reservoir of Tiancheng coal mine, the final development height of the fissure zone is 90 m. The surface movement will not affect the safe operation of the dam. The height of the overlying bedrock column is greater than the sum of the height of the water-conducting fissure zone and the thickness of the protective layer, the water-conducting fissure zone will not lead to the surface water body, and the water body of Yuecheng Reservoir will not collapse into the ground, which will have an impact on the safe mining of Tiancheng Coal Mine.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD823.8
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