Development and application of lightweight underground drill rig

FAN Dong1 WANG Ruize1 TIAN Hongliang1 CHANG Jianghua1

(1.Xi’an Research Institute Co., Ltd., China Coal Technology and Engineering Group Corp., Xi’an, Shaanxi Province, China 710077)

【Abstract】The underground drill rig is too heavy, so it is difficult to move in the roadway with poor conditions. With regard to this problem, a ZDY1200G lightweight underground drill rig with 5052-H38 state high-strength aluminum alloy as the main material is developed. The idea of light structure and modularized assembly is adopted, combined with the application of light materials. The maximum weight of a single component after quick disassembly of the drill rig is 292.5 kg. The three-dimensional digital image correlation (DIC) speckle system is used to measure and analyze the strain and displacement of the aluminum-alloy feed body of the drill rig under the maximum load. The maximum principal strain under the maximum rotation load is 0.87%, and the maximum displacement of the body is 6.317 mm under the maximum pulling condition, with no plastic deformation, thus meeting the use requirements. After the development of the drill rig, an industrial field test is carried out in a mine in Cangyuan County, Yunnan Province, China. A coring hole with a depth of 512.68 m and a slope of 43° is completed. The test results showed that the underground drill rig made of aluminum alloy is equivalent to an underground drill rig with carbon steel as the main material in strength, rigidity, and reliability. It has the advantages of convenient transportation, which can be better applied to underground drilling construction.

【Keywords】 underground drill rig; light weight; DIC speckle measurement; aluminum alloy;

【DOI】

【Funds】 Shaanxi Provincial Science & Technology Coordination & Innovation Project (2016KTCQ01-73)

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(Translated by HAN R)

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This Article

ISSN:1001-1986

CN: 61-1155/P

Vol 48, No. 04, Pages 46-52

August 2020

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Article Outline

Abstract

  • 1 Lightweight structure
  • 2 Selection and test of aluminum alloys
  • 3 Three-dimensional speckle measurement by digital image correlation (DIC)
  • 4 Industrial field test
  • 5 Conclusions
  • References