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岩盐水溶开采沉陷机理及预测模型研究 【作者】任松 【导师】姜德义

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岩盐水溶开采沉陷机理及预测模型研究

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作者任松导师姜德义水利论文 G;HsYlr3h h
【作者基本信息】重庆大学,采矿工程,2005年,博士

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【中文摘要】 岩盐水溶开采沉陷具有很大的危害。它与巷采沉陷相比具有很多独特之处,巷采沉陷的理论和方法不能直接应用于水溶开采沉陷。因此,本文针对岩盐水溶开采的实际特点,主要做了以下几个方面的研究工作: 1)对矿物开采引起的上覆岩层移动、变形和破坏的一般规律进行了总结、归纳和研究。分析了水溶开采沉陷的特点和难点,为进一步研究打下了基础。2)应用相似材料模拟实验,研究了岩盐水溶开采过程中上覆岩层移动、变形和破坏规律;上覆岩层损伤演化过程及规律;开采沉陷的层面效应及分层特性;开采沉陷岩层破碎岩体尺寸特征等内容。3)现有数值分析软件,在开采沉陷数值模拟方面有许多不足之处。因此,本文充分利用目前有限元理论的最新研究成果,开发出了能够模拟岩盐水溶开采沉陷的有限元专用软件。4)使用有限元数值模拟方法,对岩盐水溶开采沉陷进行了系统研究。建立了6种开采模型,分别研究了开采沉陷的层面效应、角度效应、断层效应、单溶腔开采沉陷规律、多溶腔开采沉陷规律以及开采沉陷叠加原理等内容。5)在以上研究基础上,充分借鉴巷采沉陷预测的经验和方法,建立适用于岩盐水溶开采沉陷的三维预测模型,并开发了相应的计算软件。通过对以上内容的研究,获得了...更多以下一些主要成果: 1)水溶开采与巷采在开采推进方向、采空区形状、采空区形状控制、预留矿柱的难易程度、水对上覆岩层的影响、采深和采厚等方面具有很大的差异。岩盐水溶开采沉陷的影响因素更多、预测更难、控制更复杂。巷采沉陷的预测方式和方法不能直接应用于水溶开采沉陷。2)获得了岩盐水溶开采沉陷的一般规律,得到了岩层宏观损伤演化规律及方程。3)开采沉陷的层理、断层、角度效应十分明显。岩层的层状结构决定了它在开采沉陷过程中会表现出强烈的分层特性。4)岩层的破坏尺寸与岩层强度有关,可以通过岩层的物理力学参数求解主要影响半径。5)本文开发的有限元专用软件中,构建了非线性接触单元,可以模拟层理面、裂隙及断层等不连续面;在分析过程中引入了损伤变量和单元破坏判断条件,可以分析岩体的损伤破坏过程;采用删除破碎单元和弹性加载的方法,实现了开采沉陷  还原水利论文Rml__.ae2e

e(i0XJ s Nnk0【英文摘要】 The solution mining subsidence is great harmful which has a good many of specialties compared with alley mining subsidence, and the theories and methods of alley mining subsidence can’t be used for it. So based on the specialties of it, the main research works are as follow: 1) The moving, distorting and breaking rules of overburden induced by mining are summarized, concluded and studied. The specialties and difficulties of solution mining subsidence are analyzed, which is the basis for further studies. 2) The moving, distorting and breaking rules of overburden, the evolution process of damage in overburden, the bedding influence and the size characteristics of broken rock are studied with model experiment for solution mining. 3) The numerical simulation software in existence has many shortages for mining subsidence. So the new FEM software for solution mining subsidence is exploited, which makes use full of the most new fruit of FEM theory. 4) The solution mining subsidence is studied...更多 with FEM numerical simulation. 6 mining models are built. The bedding influence, the angle influence, the faultage influence, the subsidence rules of single cavern, the subsidence rules of multi-cavern and the stacking principle are studied. 5) Based on the upper studies, using for reference the experience and method of alley mining subsidence, the 3D forecast model for solution mining subsidence is built, and the software is exploited for it. The results are as follow: 1) The solution mining is different from alley mining in mining direction, the shape of mined-out area, the mechanics character of mineral, the possibility of obligating jamb, water effecting the overburden, mining deep and mining height. It has more influence factors, it’s more difficult to predict it, and it’s more complex to control it. So the predict method of alley mining subsidence can’t be used for it. 2) The rules of the solution mining subsidence are got. The evolution rules and equation of damage in overburden are got. 3) The bedding, faultage and angle effect severely on the subsidence. Because of the samdwich of terranes, it is different when every overburden distorts. 4) The size of broken terrane is connect to the rock strength. The major radius of influence can be got via mechanics parameters of terrane. 5) The Non-line contact unit is built, which is used to simulate the bedding, faultage and cranny. The damage variable and failure criterion of unit are used in the FEM software, which can analysis the process of rock damaging and breaking. It can simulate the broken rock via deleting the broken unit and adding elasticity load. 6) The stacking formula of surface distortion is got. The stacking principle is validated. The surface distortion of multi-cavern mining can be got via stacking the surface distortion of single cavern. 7) The mechanics parameters are imported in phenomenological theory, x and y direction major radius of influence and horizontal movement coefficient are imported. The new probability integral 3D model is built for subsidence, which is the same with the irregularly mined-out area and mining by all direction. The model improves effectively the traditional probability integral method. 8) The transfer 3D model one terrane by one terrane is brought forward, which improves effectively the precision when the traditional probability integral method is used for the sub critical extraction. 9) The dispersed formula is got, and the computing software is exploited with the new probability integral 3D model, which can predict expediently and effectively the subsidence of solution mining.  还原水利论文pK4~#Ab/m3{ }

%Q#?w VQ0【中文关键词】 水溶开采沉陷; 损伤演化方程; 相似模拟; 数值模拟; 有限元; 分层传递; 三维预测模型
`CBs)W0【英文关键词】 solution mining subsidence; evolution equation of damage; similar simulation; numerical simulation; FEM; transfer one terrane by one terrane; 3D forecast model水利论文$AqX?:w"Eer4{A

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TAG: 机理 姜德义 水溶 岩盐 任松
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