The Research Of Freezing Method Sinking Technology In Thick Strong Expansion Alluvium With Large Flow

With the rapid development of economy, the coal demand is increasing. Mine construction develops in the direction of deep well step by step, the application freezing shaft in deep overburden is becoming more and more widely. In recent years, the alluvium traversed by shaft in mine becomes thicker and thicker along with the development of deeper mine construction in Huang-huai area of China. Many problems such as the fracture of freezing pipe, the disrepair of outer shaft lining, etc. occur in the artificial frozen alluvium due to the thick frozen alluvium and the large deformation of frozen soil wall developing. All these problems decrease not only the pace of the shaft construction, but also result in the shaft penetrating water, emerging sand, submerging, etc. Therefore we face with challenge in related theory and key engineering technology, and we must study the methodology of engineering design and construction in the thick artificial frozen alluvium, to serve the needs of engineering design and construction, to prevent deep alluvium freezing method sinking major engineering accidents.In view of the above problem, this article for expansion in some one coal mine during through the deep alluvium, large flow and thick coal seam of the special geological conditions, in summarizing some frozen technology at home and abroad and the research status quo, on the basis of aiming at the characteristics and difficulties of engineering by scientific means such as frozen construction dynamic monitoring on the spot of the very coal during freezing design frozen shaft lining structure and parameters design of freezing construction plan design, And the field monitoring data are analyzed, and learned in flow velocity, strong expansion under the geological conditions of freezing temperature field distribution, in view of the engineering features and difficulties put forward the effective solving measures,formed a set of construction and monitoring of the construction technique of deep alluvium for subsequent deep alluvium freezing method construction provides guidance.