黃沙煤礦開采沉陷規(guī)律離散元法預(yù)測(cè)
發(fā)布時(shí)間：2019-05-06 06:06
【摘要】：地下開采引起的巖體破壞將會(huì)延伸至地表,誘發(fā)地表塌陷災(zāi)害。本文以黃沙礦為例,利用課題組自主開發(fā)的三維地質(zhì)建模系統(tǒng)Rock Model與離散元軟件3DEC結(jié)合建立三維復(fù)雜地質(zhì)模型,利用正交試驗(yàn)優(yōu)選巖層與節(jié)理參數(shù),對(duì)地表沉陷和巖層移動(dòng)規(guī)律進(jìn)行預(yù)測(cè)。本文主要工作與成果如下:(1)利用課題組自主開發(fā)的三維地質(zhì)建模系統(tǒng)Rock Model的映射建模模塊與三維離散元軟件3DEC相結(jié)合,建立能夠較好描述黃沙井田復(fù)雜地層構(gòu)造的三維初始模型,再根據(jù)勘察報(bào)告,利用3DEC軟件添加符合研究區(qū)分布特征的結(jié)構(gòu)面,形成三維計(jì)算模型。(2)結(jié)合以往研究結(jié)果,確立初始巖體與結(jié)構(gòu)面的物理力學(xué)參數(shù);并根據(jù)周邊礦區(qū)的監(jiān)測(cè)數(shù)據(jù),以地表下沉系數(shù)和水平移動(dòng)系數(shù)為試驗(yàn)指標(biāo),對(duì)研究區(qū)的巖體變形和強(qiáng)度參數(shù)進(jìn)行正交試驗(yàn),反演巖體力學(xué)參數(shù)。(3)在確保建立的三維計(jì)算模型及采用的力學(xué)參數(shù)合理有效的基礎(chǔ)上,預(yù)測(cè)開采后地表的位移變化規(guī)律:①隨著煤層埋深變大,地表下沉值變小;但在斷層出露位置出現(xiàn)突變;②地表大致形成平行開采邊界的碗狀沉陷盆地;③地表水平位移變化值順煤層走向的大于順煤層傾向的,并且變化速度更快;④地表裂縫開始只出現(xiàn)在沉陷盆地的邊界,但隨著開采面積的增大,裂縫逐漸增多。
[Abstract]:The rock mass damage caused by underground mining will extend to the surface and induce the surface collapse disaster. In this paper, taking Huangsha mine as an example, the 3D complex geological model is established by combining the 3D geological modeling system Rock Model developed by our research group and discrete element software 3DEC, and the parameters of rock formation and joint are optimized by orthogonal experiment. The law of surface subsidence and rock movement is predicted. The main work and achievements of this paper are as follows: (1) the mapping modeling module of the 3D geological modeling system Rock Model developed by our research group is combined with the 3D discrete element software 3DEC. A three-dimensional initial model which can describe the structure of complex strata in Huangsha well field is established. According to the survey report, the 3DEC software is used to add the structural surface in accordance with the distribution characteristics of the study area to form a three-dimensional computing model. (2) combined with the previous research results, a three-dimensional calculation model is formed. The physical and mechanical parameters of initial rock mass and structural plane are established. According to the monitoring data of the surrounding mining area and taking the subsidence coefficient and the horizontal movement coefficient as the experimental indexes, the orthogonal test on the deformation and strength parameters of the rock mass in the study area is carried out. Inversion of mechanical parameters of rock mass. (3) on the basis of ensuring that the established three-dimensional calculation model and the mechanical parameters adopted are reasonable and effective, the change rule of surface displacement after mining is predicted: (1) with the increasing depth of coal seam, the value of surface subsidence becomes smaller; (2) the basin with parallel mining boundary is formed on the surface of the surface; (3) the change value of horizontal displacement along the coal seam strike is larger than that along the coal seam trend, and the change speed is faster; The surface fractures appeared only at the boundary of subsidence basin at first, but with the increase of mining area, the fractures increased gradually.
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD327;TD821
本文編號(hào)：2469944
[Abstract]:The rock mass damage caused by underground mining will extend to the surface and induce the surface collapse disaster. In this paper, taking Huangsha mine as an example, the 3D complex geological model is established by combining the 3D geological modeling system Rock Model developed by our research group and discrete element software 3DEC, and the parameters of rock formation and joint are optimized by orthogonal experiment. The law of surface subsidence and rock movement is predicted. The main work and achievements of this paper are as follows: (1) the mapping modeling module of the 3D geological modeling system Rock Model developed by our research group is combined with the 3D discrete element software 3DEC. A three-dimensional initial model which can describe the structure of complex strata in Huangsha well field is established. According to the survey report, the 3DEC software is used to add the structural surface in accordance with the distribution characteristics of the study area to form a three-dimensional computing model. (2) combined with the previous research results, a three-dimensional calculation model is formed. The physical and mechanical parameters of initial rock mass and structural plane are established. According to the monitoring data of the surrounding mining area and taking the subsidence coefficient and the horizontal movement coefficient as the experimental indexes, the orthogonal test on the deformation and strength parameters of the rock mass in the study area is carried out. Inversion of mechanical parameters of rock mass. (3) on the basis of ensuring that the established three-dimensional calculation model and the mechanical parameters adopted are reasonable and effective, the change rule of surface displacement after mining is predicted: (1) with the increasing depth of coal seam, the value of surface subsidence becomes smaller; (2) the basin with parallel mining boundary is formed on the surface of the surface; (3) the change value of horizontal displacement along the coal seam strike is larger than that along the coal seam trend, and the change speed is faster; The surface fractures appeared only at the boundary of subsidence basin at first, but with the increase of mining area, the fractures increased gradually.
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD327;TD821
【參考文獻(xiàn)】
相關(guān)期刊論文 前2條
1 朱浮聲,王泳嘉,Ｏ．斯蒂芬森;露天礦山高陡巖石邊坡失穩(wěn)的三維離散元分析[J];東北大學(xué)學(xué)報(bào);1997年03期
2 麻鳳海,楊帆;地層沉陷的數(shù)值模擬應(yīng)用研究[J];遼寧工程技術(shù)大學(xué)學(xué)報(bào)(自然科學(xué)版);2001年03期
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