泰西煤矿开采沉陷规律及其对周边水利工程的影响研究

发布时间：2019-04-22 14:22

【摘要】：东平湖蓄滞洪区是黄河下游重要的蓄滞洪工程之一,对黄河防洪至关重要。泰西煤矿位于东平湖蓄滞洪区内,煤矿开采将对蓄滞洪区及相关水利工程安全运行造成一定的危害。本文以此为背景,利用有限差分法对煤层开采引起的地表沉陷进行预测,设计四种开采边界,通过对比选择既能保证水利工程的安全运行,又能最大限度开采煤炭资源的最优方案。 (1)建立矿区三维数值模拟计算模型根据泰西煤矿所处区域的地质构造特征,利用课题组编制的ROCKModel程序中的映射建模模块建立三维数值模拟计算模型。 (2)矿区岩体力学参数反演以地表最大下沉系数作为试验指标,以弹性模量、泊松比、粘聚力、内摩擦角为反演因素,进行正交试验设计,安排4水平4因素试验方案。利用F1AC3D4.0,在保证开采方法相同的条件下,针对正交试验表中列出的所有参数组合方案进行开采沉陷数值模拟计算。对计算结果进行极差分析,确定试验指标随试验因素的变化规律；并利用方差分析方法,分析各试验因素对试验指标影响的显著性。根据极差分析与方差分析的结果,利用综合权衡方法对岩体的力学参数进行优选。 (3)对开采沉陷规律进行数值模拟预测根据煤层分布特征及矿区周边水利工程的布局,设计四种不同开采边界,运用F1AC3D4.0进行了开采沉陷数值模拟计算,获得了不同方案下地表移动规律。 (4)进行开采沉陷对周边水利工程的影响评价在此基础上,根据《建筑物、水体、铁路及主要井巷煤柱留设与压煤开采规程》进行不同开采方案下地表移动对周边水利工程的影响评价,从而确定既不影响水利工程又能开采更多资源的方案。
[Abstract]:Dongping Lake flood storage and detention area is one of the important flood storage projects in the lower reaches of the Yellow River and is very important for flood control of the Yellow River. Taixi coal mine is located in Dongping Lake flood storage and detention area, coal mine mining will cause certain harm to the safe operation of flood storage and detention area and related water conservancy projects. In this paper, the finite difference method is used to predict the surface subsidence caused by coal seam mining, and four kinds of mining boundaries are designed to ensure the safe operation of water conservancy projects. And can maximize the mining of coal resources of the optimal scheme. The main contents of this thesis are as follows: (1) the 3D numerical simulation model of mining area is established according to the geological structural characteristics of the area in Taixi coal mine, and the 3D numerical simulation model is established by using the mapping modeling module in the ROCKModel program compiled by our team. (2) using the maximum subsidence coefficient as the test index and elastic modulus, Poisson's ratio, cohesive force and internal friction angle as the inversion factors, the orthogonal test design is carried out for the inversion of the rock mass mechanical parameters in the mining area. Arrange 4-level 4-factor test scheme. Using F1AC3D4.0, under the same condition that the mining method is the same, the numerical simulation calculation of mining subsidence is carried out according to all the parameter combination schemes listed in the orthogonal test table. The variation rule of test indexes with test factors was determined by the range analysis of the calculated results, and the significance of the influence of each test factor on the test indexes was analyzed by using the method of variance analysis. According to the results of range analysis and variance analysis, the mechanical parameters of rock mass are optimized by means of comprehensive balance method. (3) according to the distribution characteristics of coal seams and the distribution of water conservancy projects around the mining area, four different mining boundaries are designed by numerical simulation prediction of mining subsidence law, and the numerical simulation calculation of mining subsidence is carried out by using F1AC3D4.0. The law of surface movement under different schemes is obtained. (4) to evaluate the impact of mining subsidence on the surrounding water conservancy projects, on the basis of which, according to < buildings, water bodies, In order to evaluate the influence of surface movement on the surrounding water conservancy projects under different mining schemes, the regulations for coal pillar retention and coal compression mining in railway and main roadway are carried out, so as to determine the scheme which will not affect the water conservancy project but also can exploit more resources.
【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】：2014
【分类号】：TV22;P642.26

【参考文献】