... Abstract To solve various technological problems of mining, such as, prevention of air inflow into coal-seam degassing holes and steam entry into underground galleries when thermoshaft production of heavy oil is performed. There are developed the chemical compositions to form the membranes...

... in this tunnel section. ground transportation aalenium 2 Reservoir Characterization Upstream Oil & Gas exploratory shaft reservoir geomechanics strength tunnel section exploration structure gallery Claystone rail transportation displacement membrane tunnel boring machine tunnel bedding...

... ABSTRACT: In this study, a series of experimental tests was carried out to investigate the effect of polyurea type spraying membrane (SM) interlayer on load bearing capacities of the concrete slabs with the size of 600 mm × 600 mm × 100 mm. Different concrete slabs with SM interlayer...

... 2019 all road tunnels with a traffic load of more than 20,000 vehicles per day must have two tubes due to the requirements of the tunnel safety law (STSG). Thanks to the construction of second tunnel tubes and the corresponding cross passages sampling of support materials including membranes...

... SYSTEM Is meant by flexible support system from the field to a set of elements formed mainly by a steel membrane of high tensile strength anchored to the ground with bolts, which is capable of receiving efforts of the bolts and distribute them by applying thrusts to the field on a continuous basis. 1069...

... others, cause an important dispersion of testing results, making it necessary to perform a large number of tests, to be able to extract conclusions and correlations. On the other hand, the irregularity and roughness of the samples walls is the cause of membranes fre- quently being broken, when triaxial...

... In this paper is presented the physical-mathematical models of analysis and design for the load support capacity calculation, which have been developed for a new type of "anisotropy" membrane under different installation conditions. The new membrane, TECCO® Mesh G-65 is made of high strength...

...-SHALE INTERACTION MECHANISMS Water-based fluids may interact with shales in three principally different ways: The contacting fluid is able to build an imperme- able membrane on the shale surface, thereby pre- venting any direct interaction between the con- tacting fluid and the rock. This protective...