Make mine safety have greater support, cross
Chinese course by e. Kroeger, Ph.D., physical education, Li Xiaoting.
Laboratory tests show that the manufacturer of the belt system has been in Southern Illinois University.
SIUC, the provincial normal university of National Taiwan University (last year), wanted to help supplement underground coal mines, also known as "coal root tendons", for safety support.
Failure is a serious problem of underground safety in coal mines all over the world. From 1995 to 200 1, workers lost their lives and were seriously injured in American coal mine safety and rib epidemic (2003). These failed health administrative departments may be very expensive industries with very competitive prices, including equipment damage and productivity loss.
A method is used to control the limitation of bolt surface material on the box. Slab or brace ribs are made of barbed wire in coal mines and ribs commonly used in geogrids.
There is something wrong with the rib roll in a coal mine. Install four or five ribs.
The column angle is along the sidewalk, as shown in figure 1. These ribs are expanded in an epoxy box with foot-long fixing bolts … The windshield is usually 12 inch wide, 2 inches thick and 48 inches long. These plates are used to control the rolling or falling of lump coal.
This is an expensive method, and only marginal success is a disadvantage.
As time goes on, the broken plate is the plate from which the coal peels off, from the back of the bolts and plates.
Cover enters travelway, causing injury to workers and equipment.
Figure 1. There are coal pillars at the corner where the ribs are located.
In 1999, Dr. Chugh introduced adding auxiliary support to this big rib and rolling it from a belt system ... The system includes a corner with a coal pillar and a traditional roof bolt for fixing the box with a 20-foot geotextile belt, as shown in Figure 2. Due to the connection method, existing problems and the installation and tensioning rope system, only a few of them are installed in the mine site.