STACKABLE MINE ROCK SHIELDS
A stackable mine rock shield is disclosed. The mine rock shield includes a body having a first surface and a second surface, an aperture positioned at about the center of the body for receiving a fastening mechanism, a continuous protuberance extending outwardly from the first surface of the periphery of the body and defining a recess wherein the continuous protuberance intersects the first surface of the body to form an angle of intersection with such first surface, and an edge portion at the perimeter of the body. The mine rock shield may further include a rigid notch at the periphery of the body.
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This application is a continuation of U.S. patent application Ser. No. 12/695,948 filed Jan. 28, 2010 and claims the priority to U.S. Provisional Application No. 61/148,591 filed Jan. 30, 2009, the entire contents of which are hereby incorporated by reference in their entirety.
GOVERNMENT INTERESTSNot applicable
PARTIES TO A JOINT RESEARCH AGREEMENTNot applicable
INCORPORATION BY REFERENCE OF MATERIAL SUBMITTED ON A COMPACT DISCNot applicable
BACKGROUNDThe present disclosure relates generally to underground mine supports, and more particularly, to stackable mine rock shields.
Conventional mining operations typically utilize assemblies comprising bolts, bearing plates, and rock shields to maintain and reinforce the structural integrity of underground mines. The bolts generally extend through openings in the center of and are secured against the bearing plates and rock shields to provide support to mine surfaces. During drilling, blasting or digging, as additional rock surfaces are exposed, additional rock shields are used to reinforce exposed surfaces. The bolt, bearing plate, and rock shield assemblies may also act as points of attachment for support cables or other mining paraphernalia.
SUMMARY OF THE INVENTIONBefore the present methods are described, it is to be understood that this invention is not limited to the particular systems, methodologies or protocols described, as these may vary. It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present disclosure which will be limited only by the appended claims.
It must be noted that as used herein and in the appended claims, the singular forms “a,” “an,” and “the” include plural reference unless the context clearly dictates otherwise. Thus, for example, reference to a “coil” is a reference to one or more coils and equivalents thereof known to those skilled in the art, and so forth. Unless defined otherwise, all technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art. As used herein, the term “comprising” means “including, but not limited to.”
Embodiments of the present invention are directed to a mine rock shield including a body having a first surface and a second surface, an aperture positioned at about the center of the body for receiving a fastening mechanism, and a continuous protuberance extending outwardly from the first surface of the periphery of the body and defining a recess. The continuous protuberance intersects the first surface of the body to form an angle of intersection. The mine rock shield further includes an edge portion at the perimeter of the body.
In certain embodiments, the body of the mine rock shield is generally planar. In other embodiments, the body is round. In yet other embodiments, the body is rectangular.
In various embodiments of the invention, the diameter of the recess defined by the continuous protuberance of the mine rock shield increases, decreases or remains constant as the continuous protuberance extends outwardly from the first surface of the periphery of the body. Aspects of the present invention include various shapes of the cross-sectional profile of the continuous protuberance including, for example, post, half-post, hook, bulb, T-shape, arrow, half-arrow, rectangle, square, round, triangle or a combination thereof. In some embodiments, the continuous protuberance may intersect the body to form an obtuse angle of intersection. In other embodiments, a right angle of intersection is formed. In yet other embodiments of the invention, an acute angle of intersection is formed.
According to some embodiments of the invention, the edge portion is unfinished while in other embodiments, the edge portion is rounded, rolled, folded or looped. In other embodiments, the edge portion is turned upward. In further embodiments, the edge portion is substantially perpendicular to the plane of the body. In still other embodiments, the edge is immediately adjacent to the continuous protuberance.
In further embodiments of the present invention, the mine rock shield includes an additional aperture. In yet other embodiments, the mine rock shield includes a second continuous protuberance disposed between the aperture and the first continuous protuberance extending outwardly from the first surface of the body and defining a recess at the periphery of the body.
The mine rock shield may further include a rigid notch. The rigid notch, in some aspects of the invention, may be positioned at the angle of intersection between the continuous protuberance and the first surface of the body. In certain embodiments, the rigid notch is round. In other embodiments, the rigid notch is square.
Further embodiments of the present invention are directed to a mine rock shield including a round commercial grade steel body having a first surface and a second surface, an aperture positioned at about the center of the round body for receiving a fastening mechanism, and a rib extending around the periphery of the body and defining a recess. The rib intersects the first surface of the round body to form an angle of intersection with the first surface. The mine rock shield further includes a square rigid notch at the periphery of the body and a rounded edge portion immediately adjacent to the rib. The edge portion is substantially perpendicular to the plane of the body.
In another embodiment of the present invention, a mine support system is provided that includes a bearing plate, mine rock shield, and a fastening mechanism. The bearing plate includes a first surface, a second surface, and an aperture. The mine rock shield is coupled to the bearing plate and includes a round commercial grade steel body having a first surface and a second surface, an aperture positioned at about the center of the body for receiving a fastening mechanism, and a single continuous protuberance extending outwardly from the first surface of the periphery of the body and defining a recess. The continuous protuberance intersects the first surface of the body to form an angle of intersection with the first surface. Also included in the mine rock shield is a stacking notch and an edge portion immediately adjacent to the continuous protuberance. The mine support system further includes a fastening mechanism, which couples the mine rock shield to the bearing plate, as well as a roof bolt configured to mount the bearing plate to a mine wall, roof, or other surface.
The above summary of the present invention is not intended to describe each illustrated embodiment or every implementation of the present invention.
The invention may be more completely understood in consideration of the following detailed description of various embodiments of the invention in connection with the accompanying drawings, in which:
While the invention is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail. It should be understood, however, that the intention is not to limit the invention to particular embodiments described. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
DETAILED DESCRIPTIONAn exemplary mine rock shield 200 according to one embodiment of the present invention is shown in
An aperture 240 may be positioned at about the center of the body 210. The aperture 240 mat is adapted to receive a fastening mechanism, such as, for example, a bolt, when the mine rock shield 200 is coupled to a bearing plate.
As further illustrated in
The shape of the cross-section of the continuous protuberance 250 as shown in
The mine rock shield 200 illustrated in
The mine rock shield 200 illustrated in
A mine rock shield 300 of the prior art is shown in
An exemplary mine rock shield 400 according to another embodiment of the present invention is shown in
The mine rock shield 400 of
As illustrated in
An exemplary mine rock shield 500 according to another embodiment of the present invention is shown in
An exemplary mine rock shield 600 according to another embodiment of the present invention is shown in
As illustrated in
A mine rock shield 700 according to another embodiment of the present invention is shown in
As further illustrated in
The mine rock shield 700 of
In another embodiment of the present invention, the mine rock shields described above (i.e., mine rock shields 200, 400, 500, 600 and 700) may be incorporated into a mine support system. The mine support system may include at least one bearing plate, a roof bolt configured to attach a bearing plate to a wall, roof, or other surface of a mine, at least one mine rock shield, and a fastening mechanism. The bearing plate may include a first surface, a second surface, and an aperture. The mine rock shield, such as, for example, the mine rock shield 600 shown in
When installed, embodiments of the mine rock shield of the present invention stabilize and provide support to mine surfaces, thereby preventing such surfaces from crumbling and collapsing. The mine rock shield of embodiments of the present invention also compress cracks in mine surfaces surrounding the fastening mechanism and prevent air from entering the cracks and deteriorating the mine surfaces.
The invention has been described with reference to preferred embodiments. Obvious modifications and alterations will be apparent to others upon reading and understanding the preceding detailed description. It is intended that the invention be construed as including all such modifications and alterations insofar as they fall within the scope of the appended claims or equivalents thereof.
Claims
1. A mine rock shield comprising:
- a generally planar body having a first surface and a second surface;
- an aperture positioned at about the center of the body for receiving a fastening mechanism;
- continuous protuberance extending outwardly from the first surface of the periphery of the body and defining a recess, wherein the continuous protuberance intersects the first surface of the body to form an angle of intersection with such first surface;
- a plurality of rigid notches extending outwardly from the first surface and positioned at the angle of intersection between the continuous protuberance and the first surface of the body; and
- an edge portion at the perimeter of the body immediately adjacent to the continuous protuberance, the edge portion being substantially perpendicular to the plane of the body.
2. The mine rock shield of claim 1, wherein the body is round.
3. The mine rock shield of claim 1, wherein the body is rectangular.
4. The mine rock shield of claim 1, wherein the body is constituted of a metal, wood, polymer or composite material.
5. The mine rock shield of claim 1, wherein the body is constituted of commercial grade steel.
6. The mine rock shield of claim 1, wherein the continuous protuberance intersects the body to form a right angle of intersection with the first surface of the body.
7. The mine rock shield of claim 1, wherein the continuous protuberance intersects the body to form an obtuse angle of intersection with the first surface of the body.
8. The mine rock shield of claim 1, wherein the continuous protuberance intersects the body to form an acute angle of intersection with the first surface of the body.
9. The mine rock shield of claim 1, wherein the shape of the continuous protuberance cross-section is selected from the group consisting of a post, half-post, hook, bulb, T-shape, arrow, half-arrow, rectangle, square, round triangle or a combination thereof.
10. The mine rock shield of claim 1, wherein the edge portion is rounded, rolled, folded or looped.
11. The mine rock shield of claim 1, wherein the edge portion is turned upward.
12. The mine rock shield of claim 1, wherein the edge portion is turned downward.
13. The mine rock shield of claim 1, further comprising a second aperture at the periphery of the body.
14. The mine rock shield of claim 1, further comprising a second continuous protuberance extending outwardly from the first surface of the body and defining a recess at the periphery of the body, wherein the continuous protuberance is disposed between the aperture and the first continuous protuberance.
15. The mine rock shield of claim 1, wherein the rigid notch is round.
16. The mine rock shield of claim 1, wherein the rigid notch is square.
17. A mine support system comprising:
- a mine rock shield comprising:
- a generally planar body having a first surface and a second surface;
- an aperture positioned at about the center of the body for receiving a fastening mechanism;
- continuous protuberance extending outwardly from the first surface of the periphery of the body and defining a recess, wherein the continuous protuberance intersects the first surface of the body to form an angle of intersection with such first surface;
- a plurality of rigid notches extending outwardly from the first surface and positioned at the angle of intersection between the continuous protuberance and the first surface of the body; and
- an edge portion at the perimeter of the body immediately adjacent to the continuous protuberance, the edge portion being substantially perpendicular to the plane of the body;
- a bearing plate having an aperture, wherein the bearing plate contacts the mine rock shield such that the aperture of the bearing plate and the aperture of the mine rock shield are substantially aligned; and
- a fastening mechanism extending through the aperture of the bearing plate and the aperture of the mine rock shield coupling the mine rock shield to the bearing plate.
18. A system comprising:
- a plurality of mine rock shields each mine rock shield comprising:
- a generally planar body having a first surface and a second surface;
- an aperture positioned at about the center of the body for receiving a fastening mechanism;
- continuous protuberance extending outwardly from the first surface of the periphery of the body and defining a recess, wherein the continuous protuberance intersects the first surface of the body to form an angle of intersection with such first surface;
- a plurality of rigid notches extending outwardly from the first surface and positioned at the angle of intersection between the continuous protuberance and the first surface of the body; and
- an edge portion at the perimeter of the body immediately adjacent to the continuous protuberance, the edge portion being substantially perpendicular to the plane of the body;
- wherein a first mine rock shield of the plurality is stacked on a second mine rock shield of the plurality of mine rock shields such that the plurality of notches of the second mine rock shield form a stacking surface thereby providing a space between the generally planar body of the first rock shield and the generally planar body of the second mine rock shield.
19. The system of claim 18, wherein each of the plurality of mine rock shields wherein the edge portion is folded.
20. The system of claim 18, wherein the plurality of mine rock shields are easily separable.
Type: Application
Filed: Feb 8, 2013
Publication Date: Jun 13, 2013
Applicant: THREE RIVERS PACKAGING, INC. (Cranberry Township, PA)
Inventor: THREE RIVERS PACKAGING, INC. (Cranberry Township, PA)
Application Number: 13/763,185
International Classification: E21D 23/03 (20060101);