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A method for inversely calculating the direct roof thickness based on the force acting on the fully mechanized hydraulic support

A hydraulic support, a direct technology, applied in ground mining, underground mining, special mining, etc., can solve the problems of large differences in structural forms and large errors, and achieve the effects of avoiding calculation errors, high precision, and improving calculation accuracy

Active Publication Date: 2019-03-26
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The actual measurement inversion method is based on the observation data of the mine pressure to carry out the inverse calculation of the direct roof thickness, but at present, this method is only applicable to the case of single hydraulic prop support, and the error is relatively large when this method is directly used under the condition of fully mechanized mining face , the research found that the main reason is that the structural form of the fully mechanized mining hydraulic support and the structural form of the single hydraulic prop are quite different

Method used

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  • A method for inversely calculating the direct roof thickness based on the force acting on the fully mechanized hydraulic support
  • A method for inversely calculating the direct roof thickness based on the force acting on the fully mechanized hydraulic support
  • A method for inversely calculating the direct roof thickness based on the force acting on the fully mechanized hydraulic support

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Experimental program
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Effect test

Embodiment 1

[0027] A method for inverting the thickness of the direct roof based on the force of the fully mechanized mining hydraulic support. The working resistance of the fully mechanized hydraulic support and the inversion of the actual engineering parameters that are easy to measure are used to determine the thickness of the direct roof. This method improves the accuracy of the calculation of the direct roof thickness and is simple. It is reliable, and the method is calculated according to the characteristics of the change of the roof stratum in the fully mechanized stope, and it is more adaptable in the calculation of the thickness of the direct roof under the fully mechanized mining condition.

[0028] like figure 1 As shown, the specific steps of the method include:

[0029] A. On-site investigation to obtain the support parameters of the fully mechanized mining hydraulic support, install the fully mechanized mining hydraulic support pressure monitoring substation, the pressure mo...

Embodiment 2

[0042] In this example, on the basis of Example 1, combined with the 11301 coal mining face that mainly mines 3-1 coal in a certain mine, and the working face push mining project example in June 2018, the direct jacking based on the force inversion of fully mechanized mining hydraulic supports The thickness method is further explained.

[0043] According to mine geological data and operation regulations, the average thickness of the coal seam in this working face is 4.0m, and the roof strata above the coal seam are sandy mudstone, mudstone and sandstone interbedded successively from bottom to top, with a thickness of 12.5-20.7m and an average thickness of about 15.8m. The coal mining face adopts double-column double-telescopic support shielding hydraulic support, the support model is ZY13000 / 24 / 50D, the rated working resistance of the support is 13000kN, the initial support force is 6982.4kN, and the mining height is 4.0m.

[0044] The specific steps of the method for inverting ...

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Abstract

The invention provides a method for inversely calculating the direct roof thickness based on the stress of a fully mechanized hydraulic support, which relates to the technical field of mining engineering. The method comprises the following steps: A. obtaining the structure and support parameters of the fully mechanized hydraulic support; installing a pressure monitoring sub-station of the fully mechanized hydraulic support; B. Analyzing the force on the top beam of the fully mechanized hydraulic support, establishing the moment balance equation centered on the connecting point of the top beamand the shield beam of the support, and obtaining the force on the top beam of the support by the roof of the fully mechanized stope; C. measuring and recording that work resistance of the fully mechanized mining hydraulic support, generating a curve of the end-of-cycle resistance and the pushing-mining distance, and calculating the average value of the working resistance of the support from the end of the roof pressure to the time of re-advancement; D. Solving the direct roof thickness according to the force balance equation of the roof beam of the fully mechanized mining hydraulic support when the roof is pressed and pushed again after the working face is finished. The method solves the problem of determining the direct roof thickness accurately under the fully mechanized mining condition, and has high coincidence with the engineering practice, strong adaptability to the roof strata change, accurate results and small error.

Description

technical field [0001] The invention relates to the technical field of mining engineering, in particular to a method for obtaining the thickness of a direct roof based on the inversion of fully mechanized mining hydraulic supports and actual engineering parameters. Background technique [0002] The thickness of the direct roof of fully mechanized mining face is of great significance to the selection of support and the control of surrounding rock support in the stope. At present, the elevation method and the measured inversion method are the main methods to determine the thickness of the immediate roof of the stope. The rise-up method can be divided into two cases, which do not consider the settlement of the rock beam itself and consider the settlement of the rock beam itself. The rise-up method is essentially based on the principle of directly top rock caving and breaking and expanding to fill the mined-out area. It is necessary to determine the collapse The dilation coeffi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50E21C41/16
CPCE21C41/16G06F30/17
Inventor 于凤海赵同彬谭云亮高学鹏赵伟周凯贾敬龙
Owner SHANDONG UNIV OF SCI & TECH
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