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Method for predicting maximum height of filling mining diversion fissure zone

A water-conducting fracture zone and maximum height technology, applied in the direction of prediction, instrumentation, data processing applications, etc., can solve the problems of complex underground stope stress and difficulty in finding the corresponding relationship accurately, and achieve high accuracy, easy observation, and method simple effect

Inactive Publication Date: 2015-08-26
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] Most of the traditional methods are calculated through mechanical relations. However, the stress in the underground stope is very complicated, and it is difficult to find the corresponding relation accurately.

Method used

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  • Method for predicting maximum height of filling mining diversion fissure zone
  • Method for predicting maximum height of filling mining diversion fissure zone
  • Method for predicting maximum height of filling mining diversion fissure zone

Examples

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Embodiment 1

[0077] Based on the Taiping Coal Mine, the development height of the water-conducting fracture zone in the filling mining of the 8305 working face of the Taiping Mine is predicted. The overlying strata of the 8305 working face are fine sandstone and mudstone, mainly fine sandstone.

[0078] According to the actual measurement data of Taiping Mine, the elastic modulus E is taken as 10.25Gp, the shear strength τ0 is taken as 36.12MPa, Poisson’s ratio μ is taken as 0.216, and the equivalent mining thickness of filling mining is M 等 is 0.43m, the fracture angle α is 70°, and the periodic pressure step distance c is 30m. Substituting it into the calculation formula for the maximum height of the water-conducting fracture zone in filling mining, the maximum height of the filling mining water-conducting fracture zone is calculated to be 7.34m.

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Abstract

The invention discloses a method for predicting maximum height of a filling mining diversion fissure zone. Supposing a precondition that no caving zone is generated and only a fissure zone and a sagging zone are generated in the advancing process of a working face, a mathematical model which is used for predicting the maximal height of the filling mining diversion fissure zone; a critical value of top board deformation is used for determining the strata failure low of an over-limit stress limited space; and whether the strata fails is determined according to the critical value of the top board deformation. Therefore, compared with the prior art, the method has advantages of more direct calculation and higher convenience. A calculation formula for predicting the maximum height of the filling mining diversion fissure zone can be simply and accurately obtained. Furthermore the parameters in the formula can be easily acquired, and higher accuracy of the calculation process can be realized. Simple and direct calculation can be obtained. The method can quickly, effectively and accurately predict the maximum height of the diversion fissure zone and is suitable for guidance for actual production, thereby realizing safe mining under water body.

Description

technical field [0001] The invention relates to a method for predicting the maximum height of a water-conducting fracture zone in filling mining, which belongs to the field of mining engineering. Background technique [0002] In the appendix of "Regulations for Coal Pillar Retention and Pressure Coal Mining in Buildings, Water Bodies, Railways, and Main Shafts" (2000) (hereinafter referred to as "Three Regulations"), the water-conducting cracks for all caving mining methods are proposed. The calculation formula for the zone height, the height of the water-conducting fracture zone is calculated according to the cumulative mining thickness, and the application range of the formula requires that the single-layer mining thickness is 1-3m, and the cumulative mining thickness does not exceed 15m. [0003] However, it does not clearly propose a method for predicting water-conducting fracture zones during filling mining, and the mining thickness during paste filling mining cannot be...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/02
Inventor 郭忠平王玉成闫莎莎王凯杜兆文
Owner SHANDONG UNIV OF SCI & TECH
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