Dimension analysis-based metal mine goaf overlaying strata caving height prediction method

A technology of dimensional analysis and prediction method, applied in special data processing applications, instruments, electrical digital data processing, etc.

Active Publication Date: 2014-05-28
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for predicting the collapse height of the overlying rock in the goaf of the metal mine based on

Method used

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  • Dimension analysis-based metal mine goaf overlaying strata caving height prediction method
  • Dimension analysis-based metal mine goaf overlaying strata caving height prediction method
  • Dimension analysis-based metal mine goaf overlaying strata caving height prediction method

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example 1

[0048] The Jiaochong Gold Mine is located in Tongling County, Anhui Province. The ore body strikes 55°, dips southeast, with a dip angle of 10°-30°, vein thickness of 5-8m, with an average of 6m, and an average surface elevation of 160m. Mainly rock and marble, f=14~16. When the 05 stope is mined in the middle section of -460m, the roof span of the goaf is as high as 6.2m, and the area of ​​the goaf is about 400m 2, the specific relevant physical parameters are shown in Table 4.

example 2

[0050] The Rushan Gold Mine is located in Muping, Jiaodong. The mining depth of the mine is 505m, the thickness of the ore body is 0.27-7.4m, and the average thickness is 2.73m. The surrounding rocks of the roof and floor of the orebody have been altered, f=13-15. When the 02 stope was mined in the middle section of -385m, the surrounding rock of the ore body appeared to sink and caving with a thickness of 5-6m, and the roof of the ore body collapsed with an area of ​​10m 2 , the goaf area is 64,000 m 2 , the specific relevant physical parameters are shown in Table 4.

example 3

[0052] Hongtoushan Copper Mine is located in Hongtoushan Town, Qingyuan Manchu Autonomous County, Fushun City, Liaoning Province. The average thickness of the ore body is between 2.3 and 3m. The ore and surrounding rock are moderately stable. The mining depth is 770m from the surface. The surrounding rocks of the upper and lower walls are gneiss, f=12~14. Due to the large ground pressure in the deep part, the possibility of large-scale collapse in mining is very high. According to the mine's statistics on the caving area, the stope area of ​​11# mining area is 618m 2 , of which the area of ​​the larger one collapsed was 50-70m 2 , the specific relevant physical parameters are shown in Table 4.

[0053] Table 4 Comparison of predicted and measured values ​​of overlying rock caving height in metal mines*

[0054]

[0055] ( * ④The measured caving height of Jiaochong Gold Mine in the table is 6.2m measured by HILTI PD40 laser range finder; The collapse area is 50~70m 2 ,...

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Abstract

The invention relates to the detection on the goaf overlaying strata caving height under a metal mine room-and-pillar method mining conditions. The prediction method is used for determining the physical relation between the overlaying strata height and the ore body thickness, mining depth, construction stress, goaf size and overlaying strata features by using a dimension homogenous principle of the physical law. The method comprises the following steps of firstly, actually measuring on site or indoor measuring the data of the ore body thickness d, mining depth h, construction stress sigma h, goaf area s, rock unit weight gamma, rock loosening coefficient k and hardness coefficient f; substituting the data measured in the step I into a formula: lgH/d=2.1185-1.2359lg gamma ·d/ sigma h+1.3204lgf-3.0502lgk-0.9582lgh/d+0.0114lgS/d2 to obtain the mine goaf overlaying strata caving prediction height H. The method is strong in practicability, safe (without the operation that a person enters a shaft), compact and economic in the complementation process, and avoids the high hazard of the on-site actual measuring on the goaf overlaying strata caving height.

Description

technical field [0001] The invention relates to the prediction of the collapse height of the overlying rock in the goaf under the mining condition of the room-and-pillar method in metal mines. A method for predicting the relationship between void size and the physical quantities of overlying rock lithology. Background technique [0002] The caving height of the overlying rock in the goaf is not only an important parameter for mining under water, but also plays an important role in the control of rock burst in high-stress mines, the selection of mining methods and mining procedures; at the same time, the caving height and range of the overlying rock are What support measures to take in the mine and how much support load the support structure should provide provide parameter basis. The caving height is a part of the failure height of the overlying rock in the goaf. The caving of the overlying rock has a large impact force, strong destructiveness, and short occurrence time, ca...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 赵康石亮赵奎严雅静赵晓东
Owner JIANGXI UNIV OF SCI & TECH
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