盾构法深长煤矿斜井围岩蠕变对衬砌结构受力影响分析
发布时间：2018-09-12 10:56
【摘要】：近年来,随着经济建设的发展,煤矿开采深度逐渐向更深发展,直接导致煤矿开采巷道安全施工和长期使用的潜在威胁日趋严重。在较高的地应力下,围岩的蠕变可能会对煤矿斜井的长期使用安全性造成威胁。本文依托于神华新街煤矿斜井工程,对盾构法深长斜井围岩蠕变对衬砌结构受力影响进行了研究,主要研究工作如下：1.参考相似地层的蠕变试验曲线,拟合出了Burgers模型蠕变方程和隐式蠕变方程6的相关参数。建立了斜井围岩蠕变的地层—结构模型,对不同蠕变模型、不同结构—围岩接触面模拟方式和不同管片衬砌接头模拟方式进行了对比分析,得到了相对合理的蠕变模型和模拟方式。2.基于斜井围岩蠕变的地层—结构模型,分析了自重应力场下盾构法深长煤矿斜井围岩蠕变对衬砌结构受力和变形的影响,得到了自重应力场下斜井衬砌内力和变形随时间的规律。3.基于斜井围岩蠕变的地层—结构模型,分析了不同构造应力场下盾构法深长煤矿斜井围岩蠕变对衬砌结构受力和变形的影响,得到了不同构造应力场下斜井衬砌内力和变形随时间规律。
[Abstract]:In recent years, with the development of economic construction, the depth of coal mining is gradually further developed, which directly leads to the potential threat of safe construction and long-term use of coal mining roadway. Under high ground stress, the creep of surrounding rock may threaten the safety of long-term use of inclined wells in coal mines. Based on the inclined well project of Shenhuaxinjie coal mine, the influence of surrounding rock creep of shield tunneling method on lining structure is studied in this paper. The main research work is as follows: 1. According to the creep test curves of similar strata, the parameters of creep equation of Burgers model and implicit creep equation 6 are fitted out. The formation structure model of surrounding rock creep in inclined well is established, and the different creep models, different simulation methods of structure-surrounding rock contact surface and different simulation modes of segment lining joint are compared and analyzed. A relatively reasonable creep model and simulation method. Based on the stratigraphic structure model of inclined shaft surrounding rock creep, the influence of shield tunneling method on the stress and deformation of lining structure in deep inclined coal mine under gravity stress field is analyzed. The law of internal force and deformation of inclined shaft lining with time under gravity stress field is obtained. Based on the stratigraphic structure model of inclined shaft surrounding rock creep, the influence of shield tunneling method on the stress and deformation of lining structure in deep inclined coal mine under different tectonic stress fields is analyzed. The law of lining internal force and deformation with time under different tectonic stress fields is obtained.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD32
本文编号：2238780
[Abstract]:In recent years, with the development of economic construction, the depth of coal mining is gradually further developed, which directly leads to the potential threat of safe construction and long-term use of coal mining roadway. Under high ground stress, the creep of surrounding rock may threaten the safety of long-term use of inclined wells in coal mines. Based on the inclined well project of Shenhuaxinjie coal mine, the influence of surrounding rock creep of shield tunneling method on lining structure is studied in this paper. The main research work is as follows: 1. According to the creep test curves of similar strata, the parameters of creep equation of Burgers model and implicit creep equation 6 are fitted out. The formation structure model of surrounding rock creep in inclined well is established, and the different creep models, different simulation methods of structure-surrounding rock contact surface and different simulation modes of segment lining joint are compared and analyzed. A relatively reasonable creep model and simulation method. Based on the stratigraphic structure model of inclined shaft surrounding rock creep, the influence of shield tunneling method on the stress and deformation of lining structure in deep inclined coal mine under gravity stress field is analyzed. The law of internal force and deformation of inclined shaft lining with time under gravity stress field is obtained. Based on the stratigraphic structure model of inclined shaft surrounding rock creep, the influence of shield tunneling method on the stress and deformation of lining structure in deep inclined coal mine under different tectonic stress fields is analyzed. The law of lining internal force and deformation with time under different tectonic stress fields is obtained.
【学位授予单位】：西南交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD32
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