西部白垩系地层深厚富水基岩煤矿立井冻结壁稳定性的基础理论研究

With the increasing demand of coal, mine construction gradually develops toward deep well construction. Freezing method is an effective construction method to pass through the thickest alluvium for coal mine shaft. It is more important theoretical value and practical significance to research the stability for frozen wall of coal mine shaft in deep aqueous bedrock. According to the key fundamental problems of stability for frozen wall of coal mine shaft in the western aqueous bedrock Cretaceous stratum, based on experimental study, the project carries out systematic and scientific study with a combination of theoretical analysis and numerical calculation methods. Specific studies are as follows：(1) Experimental Study on the physico-mechanical properties of frozen wall rock of aqueous bedrock in low temperature; (2) Freezing-damage mechanical properties of frozen wall rock; (3) Moisture-heat transfer mechanism and coupling analysis of freezing temperature field and moisture field and stress field during freezing process of frozen wall rock; (4) Evaluation of stability for frozen wall and the finite element numerical calculation for temperature coupled with moisture and stress of frozen wall in deep aqueous bedrock; (5) Interaction mechanism of frozen wall shaft in deep aqueous bedrock and shaft lining. The results provide scientific and theoretical reference for frozen design of coal mine shaft in deep aqueous bedrock Cretaceous stratum in western.

随着煤炭需求的增加，矿井建设逐渐向深井建设方向发展。冻结法是深厚富水基岩煤矿立井的有效施工方法，研究深厚富水基岩立井冻结壁稳定性具有重要的理论研究价值和工程实际意义。本项目针对我国西部地区白垩系地层深厚富水基岩煤矿立井冻结壁稳定性关键基础问题，以试验研究为基础，采用理论分析和数值计算相结合的研究方法，开展系统科学的研究：（1）富水基岩冻结壁岩石低温状态下物理力学特性试验研究;（2）富水基岩冻结壁岩石冻结损伤力学特性研究；(3)冻结壁岩石冻结过程水热迁移机理和冻结温度场、水分场、应力场的耦合分析研究；（4）富水基岩冻结壁水热力耦合有限元数值计算及冻结壁稳定性评价；（5）富水基岩立井冻结壁-井壁的相互作用机理研究。为西部地区白垩系地层深厚富水基岩煤矿立井冻结设计提供科学的理论依据。

随着煤炭需求的增加，矿井建设逐渐向深井建设方向发展。冻结法是深厚富水基岩煤矿立井的有效施工方法，研究深厚富水基岩立井冻结壁稳定性具有重要的理论研究价值和工程实际意义。本项目针对我国西部地区白垩系地层深厚富水基岩煤矿立井冻结壁稳定性关键基础问题，以试验研究为基础，采用理论分析和数值计算相结合的研究方法，开展系统科学的研究,取得了以下的研究成果（1）富水基岩冻结壁岩石低温状态下物理力学特性试验研究;（2）富水基岩冻结壁岩石冻结损伤力学特性研究；(3)冻结壁岩石冻结过程水热迁移机理和冻结温度场、水分场、应力场的耦合分析研究；（4）富水基岩冻结壁水热力耦合有限元数值计算及冻结壁稳定性评价；（5）富水基岩立井冻结壁—井壁的相互作用机理研究。为西部地区白垩系地层深厚富水基岩煤矿立井冻结设计提供科学的理论依据。