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Overhand cut and fill mining involves excavating a horizontal slice of an orebody, then filling the void with a backfill material - typically mine waste or rejects from the processing plant . After backfilling, another slide is taken on top of the previous one, with the process proceeding until the orebody extraction is complete.
Underhand cut and fill mining also starts with a single horizontal slice, but subsequent slices are removed from below the initial one. In underhand mining, the backfill material usually has cement added to make a low grade concrete roof that is sufficiently strong to safely work under.
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What is an antonym for the word overhand?
butter
What are the different ways to crack a whip?
Circus or ringmaster crack slow figure 8 fast figure 8 underhand crack thumb flip crack overhand crack backward crack behind the back crack under the feet crack...jump and crack it under your feet while in the air volley crack...using one or two whips
What type of mining is used when mining for ruby?
Ruby Mining
What is an example of mining?
an example of mining is a damming
What is trackless mining?
mining which machinery is used. LHD,DRILL RIGS,DUMO TRUCKS...MOBILE MACHINERY FORMS MAJOR PART OF THIS TYPE OF MINING
Would you recommend that someone with tennis elbow lift objects overhand or underhand?
I would recommend lifting objects underhand to reduce strain on the elbow. Overhand lifting can put more stress on the tendons and worsen symptoms of tennis elbow.
When serving can you alternate underhand and overhand when it your turn to serve in volleyball?
of course you can!. . .
What does underhand and overhand mean in volleyball?
Underhand is where your hit the ball by reaching forward underneath it. Overhand is where you hit the ball above your head. Which one you use would have to depend on where you are relative to the ball. If it is above your head, you will have to use overhand (maybe you will have to jump), while if the ball is going to hit the ground in front of you, you will have to use the underhand hit (and you may have to dive for it).
What are the two or three kinds of of service in volleyball?
underhand, overhand, and jump serve
What are the different ways you're allowed to serve in volleyball?
Two ways to serve are underhand and overhand. To serve underhand, hold the ball in one hand and hit it upward with the other fist or forearm, so the ball flies in a parabola into your opponents' side of the field. To serve overhand, toss the ball above your head and then smack it with your wrist, palm, or fingers to send the ball over the net in a parabola flatter than the underhand serve.
Is it legal for a basketball player to shoot free throws underhand?
it is good to use underhand layups than overhand because in overhand layups the momentum of ur body is added to ur realese so when u release the ball at a gud speed the ball often bounce of the backboard............. but underhand layups require more strength and a good height to execute it................................learn underhand layups and execute it in the game and have fun.................................
What are three types of shooting in lacrosse?
Overhand, prefered by most coaches. Side-arm, easy to defend. and... Underhand.
Is the underarm serve rejected in tennis?
You can hit an underhand serve in tennis; however, the overhand serve is more effective because it is more powerful. That is why you don't see the underhand serve used much.
What are the five skills ofa volleyball game?
block, set (volley), bump(pass), serve (underhand and/or overhand),and spike
What does underhand mean?
"Underhand" refers to a type of serve, and is the opposite of "overhand". An underhand serve is when the server holds the ball in front of them, at the height of their hip, and hits the ball out of their hand using their opposite fist or palm in order to serve. Meanwhile, an overhand serve is when the server tosses the ball in the air, over their head, in front of them, and uses their other hand to hit the ball in the air and over the net for a serve.
Do you pitch under hand in softball?
If your playing any kind of Womens softball then yes. But for mens softball, it matters what league your playing in. Some lay overhand slow itch, overhand fast itch, underhand slow pitch or underhand fast pitch. Check with a teamate or make sure what kinda of softball you are playing
Which lacrosse shot is faster underhand overhand or sidearm?
it all depends on the person .... The fastest shot I have ever seen was a side arm
