Error Analysis of Rescue Drilling in Coal Mine Disasters

 

Liu Shaotang

School of Civil Engineering, Henan Institute of Engineering.
Zhengzhou, China
lst700@163.com

Jiang Ruibo

School of Civil Engineering, Henan Institute of Engineering.
Zhengzhou, China
lst700@163.com

 

 ABSTRACT

In order to ensure appropriate selection in drilling methods, accurate positioning and success of rescue task, methods used for positioning reasonable rescue drilling in cataclysm period are discussed. Factors affecting drilling positioning are analyzed by applying theory of errors. The concept of error limit for drilling rescue is addressed and reasonable value for the error of rescue drilling construction is studied. The estimation method for reasonable accuracy of rescue drilling is explained with applications. As relevant researches indicated, half-width of mine tunnel is the total error limit of drilling rescue. Therefore the rescue work only positively functions when integral influences from errors of confirmed underground finishing drilling of hole, of surveyed surface drilling positioning and of automatic guiding drilling is within this error limit. The surface drilling location and drilling construction shall be provided with reasonable methods and be planned in line with respectively allowable errors.

Keywords: Drilling rescue; drilling positioning accuracy; drilling error; emergency rescue.

Get the entire paper (pdf)    Go back to the TOC