Hydraulic isolation and its application for various purposes in the coal industry
Abstract
Lining of mine workings is usually carried out using brickwork with cement, concreting, or cement grouting. Depending on the water pressure, its quantity, composition, temperature, or technical conditions, cements of various grades are used, along with sands and gravels of the most diverse granulometric compositions and qualities. The disadvantages of brickwork and even concrete masonry include their water permeability (especially under high water pressure). In the case of cement grouting, a significant thickness of the cement layer is required, as well as the absence of water movement. Only under these conditions does the cement set and achieve a certain degree of water resistance. It should be noted at the same time that concrete and even cement do not completely fill all the voids they are meant to fill. For example, cracks and irregularities in the walls of mine workings are poorly filled if they are of small size. During concreting and cementation, these voids and cracks are always filled with water, because water penetrates into all, even the smallest, cracks. The author makes use of this ability of water to penetrate and fill all cracks in the proposed type of grouting. The substance that can isolate cracks and irregularities in the rock and prevent water from entering mine workings is rubber.
None