Study on influence of fault structure on coal mine gas occurrence regularity based on the fractal theory: a case study of Panxi Mine in China

ABSTRACT

In order to study the gas occurrence regularity and the main controlling factors of Panxi Mine, gas parameters of the mine were determined through the combination of field survey and experiment, and the distribution regularity of gas content in coal seam strike and dip was analyzed. Besides, the fault structure was quantitatively researched based on the fractal theory. The experimental results show that the fractal dimension of the mine mostly ranges from 0.7 to 1.6. The fault structure becomes more complex with the increase of fractal dimension, and the gas content in the region with a larger fractal dimension is higher. The fractal dimension of fault can reflect complexity of geological structure of the mine. The research is targeted to the prevention and control of gas accidents in Panxi Mine, and it has important theoretical and practical significance for promoting safety production and gas development and utilization in coal mines.

KEYWORDS:

• Mine
• gas occurrence
• fault
• fractal dimension

Acknowledgment

The authors are grateful to all the people who helped them complete this paper.

Additional information

Funding

This work was supported by the National Natural Science Foundation of China [51674254], [51504097] and [51604116], the State Key Research Development Program of China [2016YFC0801404], the Science and Technology Research Project of Hebei Colleges and Universities [Z2018224], the National Science and Technology Major Project of China [2016ZX05045004]. and the Research Fund of The State Key Laboratory of Coal Resources and safe Mining, CUMT [SKLCRSM19KF008].

Notes on contributors

Yongjie Liu

Yongjie Liu is a doctor of North China Institute of Science and Technology.

Xuelong Li

Xuelong Li graduated from China University of Mining and Technology with a doctor degree at 2017. His research  interest is prevention and control of gas-bearing coal and rock dynamic disasters. Now he works at Chongqing University.

Shumin Liu

Shumin Liu is a doctor of Chongqing University.

Peng Chen

Peng Chen graduated from China University of Mining and Technology with a doctor degree at 2015. His research  interest is prevention and control of gas-bearing coal and rock dynamic disasters. Now he works at North China Institute of Science and Technology.

Tao Yang

Tao Yang graduated from China University of Mining and Technology(Beijing) with a doctor degree at 2014. His research  interest is prevention and control of gas-bearing coal and rock dynamic disasters. Now he works at North China Institute of Science and Technology.