Report: APP CMHS Project 1

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5.4. Outbursts Control

Despite the great efforts in developing technologies to manage outbursts, the phenomena still poses serious safety threats to underground coal mining, and as the mining depth increases, the intensity and frequency of outbursts often increases. A number of options have been suggested for further development in this report.

Current leading technologies successfully developed and applied in some of APP countries include:

  • outburst management plan

  • gas content based prediction

  • pre-mining seam conditioning with de-stressing and degassing technology.

R & D requirements to address the gaps in outburst control technology and to meet future needs in APP countries include:

  • gas drainage in soft, low permeable and deep coal seams

  • improved prediction indices and threshold values.

Australia has so far successfully managed the risk of outburst through an effective outburst management plan, gas content based prediction method and extensive gas drainage with advanced drilling technologies such as SIS and MRD. The pre-mining seam conditioning with de-stressing and degassing technology developed in China for deep seam mining can be applied to coal mines in other APP countries with similar conditions. These mature technologies can be transferred to the other APP countries where conditions are suitable through training, workshops, and demonstration projects. It should be noted that coal mining conditions vary from country to county. For example the mining depth in Australia is less than 600 m whereas coal seams in China are deeper, relatively soft and less permeable.

As China is facing serious challenges in managing and controlling outburst mainly in soft, low permeable, and deep seams, it is suggested that China and Australia, in collaboration with other countries of interest, to progress gas drainage technologies and improving prediction indices and threshold values.

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