A Design Method for Cooling of Frozen Filling Body in Deep Well

Abstract

The invention discloses a deep-well frozen filling body cooling design method. From the design angle of mine cooling, when the cooling control value is reached, under the conditions of different sizegrading and filling materials, the refrigeration capacity and time and the cooling efficiency of a frozen filling body are tested; from the design angle of the filling rate, when the engineering control value is reached, under the freeze thawing conditions of the different size grading and filling materials, the compacting mechanical properties are tested; the optimum material ratio, the size grading and the temperature which reach cooling and achieve engineering control are determined; and by mounting top plate dynamic monitoring equipment and temperature sensing equipment, the temperature, the material ratio and the size grading of the frozen filling body are adjusted in real time, and thus the filling and cooling effects are guaranteed. Through the deep-well frozen filling body coolingdesign method, the difficult problem of cooling of the deep solid filling mining technology on an engineering site is solved.

Description

technical field [0001] The invention relates to a cooling design method in deep mining, in particular to a cooling design method for frozen filling bodies in deep wells. Background technique [0002] At present, the mining of deep coal resources has become normalized, especially in the mining conditions of 1000-2000m deep coal resources. After deep mining, the growth rate of rock formation temperature is (10-40) ℃ / km, and mining rock formation control and stope cooling have become important challenges in deep mining. As one of the core technologies of green mining in coal mines, backfill mining technology can effectively inhibit rock formation movement and control surface subsidence. How to reduce the temperature of the working face and realize the moderate temperature mining of the filling face of deep coal resources is of great significance to the development of deep resources while adopting filling mining. Contents of the invention [0003] Technical problem: The purp...

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Problems solved by technology

[0003] Technical problem: The purpose of this invention is to provide a cooling design method for frozen filling bodies in deep wells, to solve the problem that there is no accurate and comprehensive treatment method for the design and control of freezing filling body cooling in deep solid filling coal mining