JOSEPH CRAIG ZELANKO
Engineers in Cranberry Township, PA

5993116, Nov 30, 1999

Jun 30, 1997

8/885348

Ronald L. Paxton - Bristol VA
Joseph C. Zelanko - Cranberry Township PA
Timothy J. Shean - Bristol VA

Sandvik Rock Tools, Inc. - Bristol VA

E21D 2000

4052596

Provided is a novel rock bolt anchoring system and a method of use thereof. The reactive grouting system, comprises: (a) a resin component containing an unsaturated polyester resin; and (b) a catalyst component separated from the polyester resin. The catalyst component comprises a catalyst effective to cross-link the polyester resin and a filler having a proportion of particles having a size of from 0. 01 to 100 (preferably from 0. 5 to 50. mu. m) and a mean particle size of 1 to 5. mu. m (preferably 3 to 5. mu. m). The system has particular applicability in the anchoring of mine bolts, facilitates installation of a reinforcing member, and is exceptionally fast in and strong upon curing.

5934990, Aug 10, 1999

Apr 16, 1997

8/834389

John E. Steffenino - Bristol TN
Timothy J. Shean - Bristol TN
C. Dempsey Holstein - Hilltop WV
Joseph C. Zelanko - Cranberry Township PA

The Tensar Corporation - Atlanta GA
Sandvik Rock Tools, Inc. - Bristol VA

E21F 114

454170

A mine tunnel ventilation control device and method for constructing same quickly with an easily transportable matrix material to provide a rigid flame retardant barrier wall. The air flow stopping includes a peripheral frame extending about and across a tunnel opening to which is secured a matrix material, preferably in the form of a composite including a sheet of very strong grid material, such as a biaxially oriented integral geogrid or the like, bonded to a sheet of a textile material, such as a non-woven, needle punched, geofabric or the like which spans the apertures of the geogrid. At least one side of the matrix material, and preferably both sides, are covered with a sealant composition to prevent passage of air through the mine stopping and to develop structural rigidity.