Abstract: A method and kit for installing a stopping in a mine opening includes securely fixing in the mine opening a screen of a size of about 2 to 24 mesh, preferably about 10 to 20 mesh, most preferably about 12 to 16 mesh, and applying a mortar to the screen to form a coating on the screen; and continuing the application of the mortar until the stopping is airtight. Preferably the screen is composed of steel wire of a diameter from about 0.010 to 0.030 inches (about 0.025 to 0.075 cms). Preferably the mortar is ready-to-use-mortar. The kit comprises as a first component, a screen of mesh size of about 2 to 24 suitable for installation in an opening in the mine and receiving a mortar and supporting the mortar (having a tensile strength of at least 150 lbs/inch) and, as a second component, a mortar, preferably a ready-to-use mortar, for application to the screen to provide a stopping.

Abstract: A cartridge containing a two component, self-setting composition. The cartridge comprises a tube formed of a flexible, rupturable material and having a first component of said composition sealed therein. A depression is formed in said tube with said depression being filled with a second component of said composition. The second component is sealed within the depression by sealing means. In one embodiment of the invention the sealing means comprises a strip of tape having an adhesive thereon. In another embodiment the sealing means comprises the joint formed between portions of the tube contiguous with the sides of the depression. In another embodiment the sealing means comprises a flap. The flap is created when said tube is formed by rolling up a strip of said rupturable material having two side portions wherein one side portion of the strip is sealed to the free edge of the other side portion and leaving a margin defining said flap. The flap is disposed over the filled depression and is sealed in place.