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Research on process parameter optimization of irregular coal face.

Qinghai Li1, Zijun Wang2, Nan Liu2

  • 1College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao, 266590, People's Republic of China. liqinghai@sdust.edu.cn.

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|May 27, 2024
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Summary

This study addresses mining challenges at Daizhuang Coalmine

Keywords:
Mining speedPressure bumpingRoof cutting pressure reliefStopping line position

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Area of Science:

  • Mining Engineering
  • Geotechnical Engineering
  • Rock Mechanics

Background:

  • Challenges in coal mining include limited pressure relief, impact risks, and changing working face lengths.
  • The 1353 working face at Daizhuang Coalmine faces specific operational constraints.
  • Existing methods for managing stress and ensuring safety are insufficient for complex mining environments.

Purpose of the Study:

  • To identify and address key issues in the 1353 working face mining process.
  • To propose and evaluate comprehensive control measures for enhancing mining safety and efficiency.
  • To provide guidance for the safe mining of irregular working faces.

Main Methods:

  • Numerical simulation to analyze stress distribution under different mining parameters.
  • Optimization of roof cutting schemes, mining speed, and stopping line locations.
  • On-site monitoring to validate the effectiveness of implemented measures.

Main Results:

  • Implemented measures include a specific drilling and blasting scheme (20m deep roof cutting) and optimized operational parameters.
  • Numerical simulations confirmed that the proposed measures effectively control stress variations.
  • On-site monitoring verified significant improvements in the surrounding rock state and overall safety.

Conclusions:

  • Comprehensive control measures, including optimized drilling, blasting, mining speed, and stopping line, enhance safety in the 1353 working face.
  • The study demonstrates the effectiveness of integrated approaches for managing mining-induced stresses.
  • Findings offer valuable insights for the safe and efficient mining of irregular coal working faces.