provided by the National Natural Science Foundation of China (No. 50874104);the Scientific Research Industry Promotion Project of Jiangsu Province of China(No. JH07-023)
A test method for the non-destructive determination of bolt length,anchoring length,and bolt body force is described.This addresses the problems of low accuracy,limited number of data,and untimely warning signs encoun...
provided by the National Natural Science Foundation of China (No. 50874104);the Science and Technology Research of the Ministry of Education of China
In the construction of the filling gob-side entry retaining in a lane, we utilize the self-slide natural phenomenon of a falling gangue in an inclined coal seam goaf. First, we put the falling gangue of goal above the...