Deep-well frozen filling body cooling design method

A technology for filling bodies and deep wells, which is applied to fillings, mining equipment, earthwork drilling and mining, etc. It can solve the problems of not having a set of accurate and comprehensive processing methods, and achieve the effects of wide practicability, convenient operation and simple methods

Active Publication Date: 2018-06-01
CHINA UNIV OF MINING & TECH
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AI Technical Summary

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

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] The cooling design method of deep well frozen filling body of the present invention, the specific steps are as follows:

[0022] (1) Mine Cooling Design

[0023] a. Test the distribution characteristics and changing law of the temperature in the mining face;

[0024] b. Combined with the field practice, the influence of the frozen filling body under the volume on the temperature of the original rock and the cooling effect on the working face are obtained;

[0025] c. According to the volume of gangue filled in the gob, calculate the initial temperature of the frozen filling body when the cooling control value is reached;

[0026] d. Through laboratory tests, the refrigeration capacity, refrigeration time and cooling efficiency of frozen filling bodies under different particle size distributions and filling materials are tested, and the material ratio and particle size distribution of deep well frozen filling bodies are obtained. ;

[0027] (2) Filling rate design

...

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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...

Claims

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Application Information

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IPC IPC(8): E21F15/00E21F3/00E21F17/00
CPCE21F3/00E21F15/00E21F15/005E21F17/00
Inventor 张强张吉雄王佳奇齐文跃欧阳神央
Owner CHINA UNIV OF MINING & TECH
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