Mine rollers and mine flails like this have been tried and tested since WWI but none have proven completely effective in finding and clearing mines. This is partially because they only work well on totally flat terrain and rapidly lose effectiveness in rougher terrain where a large number of mines are typically buried.
In practice, solutions like this achieve only 50-60% effectiveness at clearing minefields, which makes them useless for civilian demining which demands a 99% clearance rate.
For that reason there's been a ton of research in this area which has resulted in better demining vehicles and interesting new techniques such as using sniffer dogs or rats to detect the explosives inside landmines. This is especially useful for the numerous plastic-shelled landmines that resist standard detection methods.
Using a layered approach with these techniques, civilian demining organisations like Mechem[0] (which pioneered the use of sniffer dogs) are now able to achieve a high enough clearance rate to make areas safe, though the work is expensive and time-consuming. If you support this sort of work, donating money to demining NGOs would be better than funding yet another ineffective mine roller.