Abstract: An ISRM Commission on Underground Research Laboratory (URL) Networking was formed in 2011 for better exchanges of information among different societies, academia, laboratories, and industry on underground studies. The Commissioners have interests in radioactive waste assessments, energy and environment evaluations, and physics rare event detections. Workshops, professional society meetings, and literature surveys are currently means for the Commission to address its scope. There are URLs established along roadway tunnels, dedicated facilities excavated, and borehole complexes drilled/tested for energy and environmental assessments. Thus networking will allow defining the most complementary experiments to isolate the high diversity of effects in heterogeneous medium of interests to the rock mechanics community. In this article, we report some preliminary findings from our recent efforts since 2011. For example, the American Geophysical Union 2012 annual meetings have sessions organized on energy and resource recovery, underground studies, and natural hazard related interactions. Some discussions of interactions among geophysics, rock mechanics, petroleum geomechanics, and mining engineering were initiated. We discuss specifically how LSBB and potential other URLs provide testing platforms for the observation of faulting in weak and tight materials. A suggested testing method has been proposed for a pulsed and stepped test sequence to be applied in the field, with the method using the High Pulse Poroelasticity Protocole - an injection and measuring device for hydromechanical testing in packed borehole intervals at depths. Such approach could allow the in situ studies of static to dynamic frictional behaviors of large scale heterogeneities that are poorly described in conventional laboratories.