河北天成煤矿岳城水库下采煤安全影响研究
发布时间：2018-11-06 11:09
【摘要】：我国的煤炭资源亟待开发,但大量的煤炭资源被压在铁路、水体、建筑物下面。据不完全统计,仅统配煤矿生产矿井的“三下”压煤就高达数百亿吨,可供10个年产1000万吨的特大型矿井生产上百年。对于很多煤炭企业来说,随着地表浅层煤炭资源的整体枯竭,“三下”压煤的开采还关系着企业的生存命脉。本文的研究对象河北省天成煤矿主要采区位于岳城水库地表水体以下,是典型的地表水体下采煤问题。本文研究的核心是天成煤矿在水库下采煤的安全性问题,主要包括两方面内容:大坝安全运行问题即采煤引起地表移动是否会传播到大坝;煤矿安全开采问题即由于采煤引起的导水裂隙带发育是否会导通地表水体。本文在充分调查矿区地质、水文地质及采煤工艺的条件下,围绕“大坝安全”、“采煤安全”这两条主要思路,研究取得以下主要成果:(1)根据概率积分法计算地表移动,地表最大沉陷值2.97m,主要影响半径530m,地面沉陷位移达10mm的点距坝基围护线的最小值约为2528m;根据FLAC3D数值模拟计算地表移动,地表最大沉陷值2.98m,主要影响半径526m,地表移动影响半径范围距坝基围护线的最小值约为2532m。(2)根据《三下规程》经验公式计算导水裂隙带发育高度,其发育高度为52.4m;根据相关文献对《三下规程》经验公式修正,一次采全高的导水裂隙带一般为分层开采的1.5倍左右,据此推算其发育高度大约为80m;根据经验倍数法计算导水裂隙带发育高度,其发育高度约为81m;根据工程类比法计算导水裂隙带发育高度,其发育高度约为68.9m;根据FLAC3D数值模拟计算导水裂隙带发育高度,煤矿整体开采完成后导水裂隙带最终发育高度为90m。(3)综上,天成煤矿库下采煤时,地表移动不会波及到大坝从而对大坝的安全运行造成影响;煤层上覆基岩柱高度大于导水裂隙带高度与保护层厚度之和,导水裂隙带不会导通地表水体,岳城水库水体不会溃入地下对天成煤矿安全开采造成影响。
[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.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD823.8
本文编号：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.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD823.8
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