黄沙煤矿开采沉陷规律离散元法预测
发布时间：2019-05-06 06:06
【摘要】：地下开采引起的岩体破坏将会延伸至地表,诱发地表塌陷灾害。本文以黄沙矿为例,利用课题组自主开发的三维地质建模系统Rock Model与离散元软件3DEC结合建立三维复杂地质模型,利用正交试验优选岩层与节理参数,对地表沉陷和岩层移动规律进行预测。本文主要工作与成果如下:(1)利用课题组自主开发的三维地质建模系统Rock Model的映射建模模块与三维离散元软件3DEC相结合,建立能够较好描述黄沙井田复杂地层构造的三维初始模型,再根据勘察报告,利用3DEC软件添加符合研究区分布特征的结构面,形成三维计算模型。(2)结合以往研究结果,确立初始岩体与结构面的物理力学参数;并根据周边矿区的监测数据,以地表下沉系数和水平移动系数为试验指标,对研究区的岩体变形和强度参数进行正交试验,反演岩体力学参数。(3)在确保建立的三维计算模型及采用的力学参数合理有效的基础上,预测开采后地表的位移变化规律:①随着煤层埋深变大,地表下沉值变小;但在断层出露位置出现突变;②地表大致形成平行开采边界的碗状沉陷盆地;③地表水平位移变化值顺煤层走向的大于顺煤层倾向的,并且变化速度更快;④地表裂缝开始只出现在沉陷盆地的边界,但随着开采面积的增大,裂缝逐渐增多。
[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.
【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】：TD327;TD821
本文编号：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.
【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】：TD327;TD821
【参考文献】
相关期刊论文 前2条
1 朱浮声,王泳嘉,Ｏ．斯蒂芬森;露天矿山高陡岩石边坡失稳的三维离散元分析[J];东北大学学报;1997年03期
2 麻凤海,杨帆;地层沉陷的数值模拟应用研究[J];辽宁工程技术大学学报(自然科学版);2001年03期
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