Study On Glazed Hollow Beads Insulation Structure System Of Deep Mine Roadway

Coal industry is one of the foundation industries in national economy in China. Coal resource occupies the absolute leading position in the production and consumption structure of energy industry in China. Coal resource plays an important role in the development of our country’s economy, and is a very important strategic resource. But along with the fast development of our country’s economy, the excessive growth of the whole society demand for mineral resources make the shortage of energy resources. Coal is the energy and foundational energy with our country the richest reserve, and the demand for coal is increasing. So the deeper of mining depth becomes, the more heat-harm is in deep mining. The underground heat harm seriously endangers the physical health, Labor safety and production efficiency for underground working staff. The ventilation and central cooling are the present effective ways for cooling in the deep mining, which have play an important role in the governance of the underground heat harm, but the governance has some obvious flaws. The subject is from the point of the main heat source of deep mine roadway——he heat release of wall rock. By establishing Glazed Hollow Beads insulation structure in deep mine roadway to slow down the transfer of wall rock heat into coal workings, this aims at reducing the air temperature in coal workings, and relieving the effect of the underground heat harm.The main contents of this thesis are summarized as follows:(1) The study of the heat transfer of the insulation structure of deep mine roadwayOn the basis of the heat transfer theory combining with the roadway support theory to research the form of deep mine cooled zone and the heat transfer process of deep mine roadway, then this study establishes the heat transfer model of the insulation structure and determines the calculation formula of unsteady heat change coefficient (k’r).(2) The study of the optimum mix proportion of Glazed Hollow Beads insulation mortarIn order to satisfy the application of Glazed Hollow Beads insulation mortar, the orthogonal test method is used to make a optimum mix proportion test. Through simple analysis and variance analysis, this test is able to conclude the rule of the thermal conductivity of Glazed Hollow Beads insulation mortar, the compressive strength, the impermeability pressure and the jet rebound rate influenced by six factors which are the amount of Glazed Hollow Beads, the amount of sand, the amount of cement, the collection type of additive, and the amount of additive. And by making a comprehensive comparison, the optimum mix proportion of Glazed Hollow Beads insulation mortar can be determined. In order to verify the correctness of the mix proportion, the performance reiteration test is made. Then the practical physical properties of insulation mortar can be concluded.(3) The numerical simulation analysis of the Glazed Hollow Beads insulation structure system of deep mine roadwayBy using the Midas/GTS, numerical simulation is made for the insulation structure of deep mine roadway. Based on the numerical simulation, the case of the displacement and stress of insulation structure system can be concluded.(4) The design of the construction technologyCombine with the particular conditions of roadway construction, the construction equipment, the construction technique and the safety of construction process can be designed for the Glazed Hollow Beads insulation structure of roadway. This establishes the foundation for engineering practice for the future.This paper reports the characteristics and regularity of the heat transfer of the insulation structure by analyzing the Glazed Hollow Beads insulation structure system of deep mine roadway. And this paper provides the optimum mix proportion and mechanized construction technology of the Glazed Hollow Beads insulation mortar. All these have provided a theoretical foundation for the Systematic establishment of the system of Glazed Hollow Beads insulation and the application of engineering practice in the future.