Resin anchored rock bolts are widely used in the construction and mining industries to support and reinforce underground roadways and openings. However, increasing the depth of underground openings, particularly in coal mines, has presented a challenge for ground control designers due to the rise in geothermal heat and coal seam combustion. This study aims to comprehensively investigate the mechanical properties, microstructure, thermal and curing characteristics of the anchoring resins using Thermogravimetric Analysis, Dynamic Mechanical Analysis, and Differential Scanning Calorimetry tests. Pullout tests were conducted on resin encapsulated rock bolts to quantify their bonding performance at elevated temperatures ranging from 20 °C to 250 °C. The results showed that the mechanical properties of the resins are closely related to the type of curing agent, filler type and size, and curing time. The compressive strength and elastic modulus of the anchoring materials ranged from 51 to 1
with a crane. we went in and used rock bolts 15 to 40 feet into the rock face and added bolts to the site to try to stabilize everything. while the community is happy that the road is open again, they are also proud. because of the quick thinking and expertise of a road supervisor and a geologist, no one is injured or killed by the rock slide. i get some cold sweats from time to time thinking about all the things that could have gone wrong that day. if i had stopped for coffee, taken a little extra time for lunch before i got out to the site. the timing of everything was such that once i got there, we had time to see what was going on and get everybody out of the way before the slide occurred. had she not been there, those rocks would have come down not just on bill and myself, but everybody that was working that scene, all the tdot crews. it would have been a much, much different story had we have been standing in that same spot.
we went in and used rock bolts 15 to 40 feet into the rock face and added bolts to the site to try to stabilize it. while the community is happy that the road is open again, they are also proud. because of the quick thinking and expertise of a road supervisor and a geologist, no one is injured or killed by the rock slide. i get some cold sweats from time to time thinking of all the things that could have gone wrong that day. if i had stopped for coffee. taken extra time for lunch before i got out to the site. the timing of everything was such that once i got there we had time to see what was going on and get everybody out of the way before the slide occurred. had she not been there those rocks would have come down and not just bill and myself, but everybody that was working that scene, all the tdot crews. it would have been a much different story had we been
rock bolts, 15 to 40 feet into the rock face, and added bolts to the side to try to stabilize everything. while the community is happy that the road is open again, they are also proud. because of the quick thinking and expertise of a road supervisor and a geologist, no one is injured or killed by the rock slide. i get some cold sweats from time to time thinking of all the things that could have gone wrong that day. if i had stopped for coffee. taken extra time for lunch before coming out to the site. the timing of everything was such that once i got there, we had time to see what was going on, get everybody out of the way before the slide actually occurred. had she not been there those rocks would have come down and not just bill and myself, but everybody that was working that scene, all the tdot crews. it would have been a much different story had we have been standing in that same spot.
the massive damage, the news crew asks themselves the age old photojournalist question. did we get the shot? my big worry was, was it actually rolling? and, you know, i waited a little while before i hit stop. i thought, please let this be on camera. please let this be on camera. i went back and rewound the tape and hit play and there it was. felt a big sense of relief. got it. i knew he had it when he didn t talk to me. he just stood there and grinned. it takes road crews five months to reopen the highway. the total cost of the cleanup, $2.5 million. we worked in the snow to get the site open again. these guys started doing the initial scaling so it was safe to move in equipment below the slope. and then a lot of work was done with a crane. we went in and used rock bolts