Determining method of net hanging position at working face retracement stage under mine high-intensity exploiting

Abstract

The invention provides a determining method of a net hanging position at a working face retracement stage under mine high-intensity exploiting. By analyzing basic parameters such as working face periodic weighting step pitch and weighting position prediction parameters and flexible net length, three different computing expressions are established, according to the comparing results of the average periodic weighting step pitch, the weighting persistence length, the flexible net length and the minimum net hanging position, the average periodic weighting step pitch and the distance between a next periodic weighting starting position and a main retracement channel are put into a corresponding computing expression, and reasonable hanging net length is computed. According to the method, scientific and reasonable determining of the hanging net position is achieved, the fact that large weighting does not exist during fully-mechanized coal mining working face net hanging is guaranteed, the fact that net hanging work is safe and smooth is guaranteed, a guarantee is provided for safe production of the retracement stage, and meanwhile great guiding significance is achieved on determining of needed flexible net length of an enterprise.

Description

technical field [0001] The invention belongs to the technical field of mine mining, and in particular relates to a method for determining the position of a hanging net during the retraction stage of a working face under high-intensity mining in a mine. Background technique [0002] my country's coal output ranks first in the world, and the coal output in 2012 reached about 3.6 billion tons. Although the growth rate of coal production has declined due to the slowdown of my country's economic growth in recent years, coal still accounts for about 70% of China's primary energy. In the next few decades, my country's coal-based energy structure will not change. Coal consumption The total amount is generally increasing, so ensuring coal production is of great significance to the development of the national economy. The Shendong mining area is a national super-large coal production base. Due to the good coal seam conditions, it is suitable for the construction of high-yield and high...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for determining the position of the hanging net in the retraction stage of the working face under high-intensity mining in the mine, aiming at solving the problems of large error and low safety factor of the hanging net scheme in the mine

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