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v118n1a3 Ground control in mining steeply dipping coal , - Know More

The mining of steeply dipping coal seams involves significant safety risks because of instability caused by the weak nature of surrounding rocks and their movement after excavation Physical and numerical models were developed to determine an optimum backfill approach to ground control in steeply dipping coal seams...

Risk assessment approach for rockfall hazards in steeply , - Know More

01-02-2021 0183 32 The presence of rockfalls in the long walls of a steeply dipping coal seam SDCS is harmful due to the cumulative damage effects of rockfall near active mining fac Therefore, this study aims to assess rockfall hazards in SDCS ,...

mining steep dipping seams - Know More

mining steep dipping seams - africaentrepreneurscoza In the Chinese coal industry, a steep coal seam is defined as one that dips at an angle greater than 45 176 Cao and Gou, 2011 , as shown in Figure 1 In contrast to coal seams with little or no flat dip angle, mining production from steeply dipping seams is inherently low and the cost is ,...

mining steep dipping seams - Know More

Mining Steep Dipping Seams We are here for your questions anytime 24/7, welcome your consultation Get Price long wall mining method 1long wall mining method 1in the upper seam of close distance coal seams pillar mining method is utilizedand in the underneath seam prepared to be mined long wall mining method is utilized...

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