Yieldable mine roof support

Abstract

A mine roof support includes a rigid body having a first end and a second end and defining an interior space, a cementitious material positioned within the interior space of the body and a plurality of support members extending circumferentially around the body and engaging an outer surface of the body. A method includes providing a mine roof support comprising a rigid body having a first end and a second end, a cementitious material positioned within an interior space defined by the body, and a support member extending circumferentially around the body and engaging an outer surface of the body. The method also includes selecting a load capacity and elongation value of the support member to provide controlled yieldable confinement of the mine roof support during loading of the mine roof support.

What is claimed is: 
     
         1 . A mine roof support, comprising:
 a rigid, generally circular body having a first end and a second end, an outer surface, and an inner surface defining an interior space; and   a support member extending circumferentially around the body and engaging an outer surface of the body.   
     
     
         2 . The mine roof support of  claim 1 , further including a cementitious material positioned within the interior space of the body, wherein the cementitious material has a strength in the range of about 200 psi to about 900 psi. 
     
     
         3 . The mine roof support of  claim 1 , further including additional support members extending circumferentially around the body. 
     
     
         4 . The mine roof support of  claim 3 , wherein the support members are spaced apart along the body. 
     
     
         5 . The mine roof support of  claim 1 , wherein the support member extends horizontally about the body. 
     
     
         6 . The mine roof support of  claim 1 , wherein the support member extends helically about the body. 
     
     
         7 . The mine roof support of  claim 1 , wherein the support member is formed of a polyester material or a metal material. 
     
     
         8 . The mine roof support of  claim 1 , wherein the body is generally cylindrical. 
     
     
         9 . The mine roof support of  claim 1 , wherein the support member has a width in the range of about 2 inches to about 5 inches. 
     
     
         10 . A mine roof support, comprising:
 a rigid body having a first end and a second end, and defining an interior space;   a cementitious material positioned within the interior space of the body; and   a plurality of support members extending circumferentially around the body and engaging an outer surface of the body.   
     
     
         11 . The mine roof support of  claim 10 , further including additional support members extending circumferentially around the body. 
     
     
         12 . The mine roof support of  claim 11 , wherein the support members are spaced apart along the body. 
     
     
         13 . The mine roof support of  claim 1 , wherein the support member extends horizontally about the body. 
     
     
         14 . The mine roof support of  claim 1 , wherein the support member extends helically about the body. 
     
     
         15 . The mine roof support of  claim 1 , wherein the support member is formed of a polyester material or a metal material. 
     
     
         16 . The mine roof support of  claim 1 , wherein the body is generally cylindrical. 
     
     
         17 . The mine roof support of  claim 1 , wherein the support member has a width in the range of about 2 inches to about 5 inches. 
     
     
         18 . The mine roof support of  claim 1 , wherein the cementitious material has a strength in the range of about 200 psi to about 900 psi. 
     
     
         19 . A method comprising:
 providing a mine roof support comprising a rigid body having a first end and a second end, a cementitious material positioned within an interior space defined by the body, and a support member extending circumferentially around the body and engaging an outer surface of the body; and   selecting a load capacity and elongation value of the support member to provide controlled yieldable confinement of the mine roof support during loading of the mine roof support.   
     
     
         20 . The method of  claim 19 , further including:
 providing additional support members extending circumferentially around the body; and   spacing the support members along a length of the body.