The Research And Engineering Application Of Deep Freezing Bedrock Shaft Lining

With the coal resource from the shallower to the deeper mining in China, shallow resources began to dry up, according to statistics of coal mining is every ten years in 100 to speed 300m mining to extend deeper underground, well depth has been through the deep overburden layer to the bedrock, a kilometre shaft has It is often seen. While the East and west mining area for the water content of the larger soil or rock, the current through the construction method of the geological conditions commonly used for freezing method, the freezing depth continue to reach new heights, the strength of the frozen wall is not well controlled, freezing construction difficult, difficult to guarantee the quality of engineering. The design and parameters of the frozen shaft wall so the design scheme can not blindly reference to previous engineering case. Study on shaft lining structure of deep freeze bedrock is necessary to engineering practice.This paper is based on the construction of freezing method in Yangcun coal mine auxiliary shaft as the research background. Through the theoretical research on the double layer reinforced concrete composite wall structure using the freezing method, the stress mechanism of clear shaft inner and outer wall, combined with the actual situation in Yangcun coal mine freezing construction process analysis, on-site construction, refinement of sub process, and puts forward suggestions on key processes, node project, provide the theoretical basis for the quality control of the wall. At the same time, the use of advanced construction technology informatization construction monitoring, the wall stress and deformation monitoring, not only ensure the wall construction safety, and according to the measured data to draw reliable conclusions, in order to provide reference for the next step of the adjustment of construction parameters. Finally, according to the design scheme of the project background model was built by ANS YS software numerical analysis of the same environment, the result is consistent with the measured data.Research and analysis of this topic is the foundation of measured data of freezing shaft wall constructing method in Yangcun Coal Mine and engineering data on the conclusions and research methods can be obtained to provide the reference for the construction of Yangcun coal mine, but also provide a theoretical basis for the region to two Huai coal mine in Yangcun Coal Mine as the representative of the freeze the shaft lining design method.