Zobrazeno 1 - 3
of 3
pro vyhledávání: '"Chuan Le Ma"'
Publikováno v:
Advanced Materials Research. :802-808
In the mining process, if the roof is very hard, it will hang in a large area in the gob. The hanging roof may cave suddenly, which will crash the mining face and generate hurricanes so as to cause casualties and equipment damage. The hard roof contr
Publikováno v:
Applied Mechanics and Materials. :1395-1400
During the extraction of steeply inclined coal seams, the coal recovery ratio is low be-cause of the coal pillar loss and the production of waste rock is high due to lots of rock roadways which causes serious environmental pollution. This status is c
Publikováno v:
Advanced Materials Research. :2872-2877
According to the difficult support problems of the roadway under the coal face on Dongtan Mine in China, a new reinforcing method using full-length grouted anchor is put forward. The strengthening principles are analyzed firstly, and the designing pa