MOBILE SIZER WITH REDUCED FINES GENERATION

1 . An underground mobile sizer comprising:

a frame;

a crawler coupled to the frame and operable to move the underground mobile sizer;

a feeder coupled to the frame and configured to receive a material;

a crusher coupled to the frame and operable to reduce a size of the material received by the feeder;

wherein the feeder further includes a conveyor operable to move the material towards the crusher, the conveyor including a first end, a second end adjacent the crusher, and a screen section located between the first and second ends; and

a belt conveyor positioned beneath the screen section and the crusher, the belt conveyor configured to receive material that travels through the screen section and the crusher;

wherein material below a predetermined size passes through the screen section to the belt conveyor without passing through the crusher.

2 . The underground mobile sizer of claim 1 , wherein the screen section includes a plurality of openings, and wherein the plurality of openings are sized to allow for material smaller than the plurality of openings to pass through and onto the belt conveyor.

3 . The underground mobile sizer of claim 2 , wherein the plurality of openings are elongated openings partially extending between the first and second ends of the conveyor.

4 . The underground mobile sizer of claim 3 , wherein each of the plurality of openings includes a width between about 50 millimeters and about 60 millimeters.

5 . The underground mobile sizer of claim 3 , wherein each of the plurality of openings includes a length greater than about 2,500 millimeters.

6 . The underground mobile sizer of claim 1 , wherein the screen section is integrated with a support surface of the conveyor.

7 . The underground mobile sizer of claim 1 , further comprising a continuous member operably coupled to a drive shaft adjacent the second end of the conveyor, wherein the continuous member is configured to move the material towards the crusher.

8 . The underground mobile sizer of claim 7 , wherein the conveyor defines a surface with the continuous member supported on the surface, and wherein the surface supports the continuous member over the screen section.

9 . The underground mobile sizer of claim 8 , wherein the continuous member includes a plurality of protrusions that extend over the plurality of openings, and wherein the protrusions are configured to move the material towards the crusher.

10 . The underground mobile sizer of claim 1 , wherein the belt conveyor is operably coupled to a tailpiece that is coupled to the frame.

11 . The underground mobile sizer of claim 1 , wherein the crusher includes a plurality of crusher drums operable by a drive, and wherein the crusher drums are controlled to rotate at a velocity to match a velocity of the material falling into the crusher from the conveyor.

12 . An underground mobile sizer comprising:

a frame;

a crawler coupled to the frame and operable to move the underground mobile sizer;

a feeder coupled to the frame and including a hopper to receive a material;

a crusher coupled to the frame and operable to reduce a size of the material received by the feeder;

wherein the feeder further includes a conveyor oriented at an angle to elevate the material above the crusher, the conveyor including a screen section located between the hopper and the crusher; and

a tailpiece coupled to the frame, the tailpiece supporting a belt conveyor positioned beneath the screen section and the crusher;

wherein the belt conveyor receives material that travels through the screen section and the crusher; and wherein material below a predetermined size passes through the screen section to the belt conveyor without passing through the crusher.

13 . The underground mobile sizer of claim 12 , wherein the screen section includes a plurality of openings, and wherein the plurality of openings are sized to allow for material smaller than the plurality of openings to pass through and onto the belt conveyor.

14 . The underground mobile sizer of claim 13 , wherein the plurality of openings are elongated openings partially extending between the hopper and the crusher.

15 . The underground mobile sizer of claim 14 , wherein each of the plurality of openings includes a width between about 50 millimeters and about 60 millimeters.

16 . The underground mobile sizer of claim 12 , wherein the screen section is integrated with a support surface of the conveyor.

17 . The underground mobile sizer of claim 12 , further comprising a continuous member operably coupled to a drive shaft located above the crusher, wherein the continuous member is configured to move the material towards the crusher.

18 . The underground mobile sizer of claim 17 , wherein the conveyor defines a surface with the continuous member supported on the surface, and wherein the surface supports the continuous member over the screen section.

19 . The underground mobile sizer of claim 18 , wherein the continuous member includes a plurality of protrusions that extend over the plurality of openings, and wherein the protrusions are configured to move the material towards the crusher.

20 . The underground mobile sizer of claim 12 , wherein the crusher includes a plurality of crusher drums operable by a drive, and wherein the crusher drums are controlled to rotate at a velocity to match a velocity of the material falling into the crusher from the conveyor.