Results 131 to 140 of about 4,010 (144)
Some of the next articles are maybe not open access.
Deep-hole directional fracturing of thick hard roof for rockburst prevention
Tunnelling and Underground Space Technology, 2012Abstract Thick hard roof in coal mines is usually a significant factor that induces dynamic disasters, such as rockburst. This study introduces a new technology called directional hydraulic fracturing characterized by cutting out an initial groove in the borehole and then injecting high pressure liquid to break the rock.
Hu He +4 more
openaire +1 more source
Experimental study on the bump-inducing mechanism of slicing in thick coal seams with hard roofs
Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2021The bump-inducing mechanism of slicing in thick coal seams with hard roofs is still not completely understood.
Chuan Chen +5 more
openaire +1 more source
Advanced Materials Research, 2012
In order to find out the cause of the mining roadway of mine test roof fall in the excavation period, to based roof stability partition method, The main research methods is using RFPA software numerical simulation, according to the specific condition roof strata of the mine test, build 6 different thickness of medium sandstone model, get the ...
Hong Tao Liu +3 more
openaire +1 more source
In order to find out the cause of the mining roadway of mine test roof fall in the excavation period, to based roof stability partition method, The main research methods is using RFPA software numerical simulation, according to the specific condition roof strata of the mine test, build 6 different thickness of medium sandstone model, get the ...
Hong Tao Liu +3 more
openaire +1 more source