... optical fiber stretch 0 formula organic-rich rock roadway reservoir characterization society iop publishing iop conf variation strata stratum 11th Conference of Asian Rock Mechanics Society IOP Publishing IOP Conf. Series: Earth and Environmental Science 861 (2021) 042052 doi:10.1088/1755-1315...

... the whole failure process of overlying strata after coal mining under different advancing distances of the working face. The results show that key strata would not be broken when the working face was advanced by 30 m. When the advancing distance increased to 50 m, the first key stratum was broken; when...

..., the layers below the foundation elevation are Quaternary sedimentary soil layers, Proterozoic schist, quartzite, and gneissic granite. With the pile tip bearing stratum being strongly or moderately-weathered rock, three groups of test piles were arranged in the foundation to determine whether the pile...

... in Nanning area under different intermittent operation conditions. The results show that: the rock-soil mass of the typical stratum in Nanning area has good heat transfer characteristics, which is conducive to the promotion of energy pile engineering. The heat transfer model proposed in this paper has higher...

... characterization fracture characterization bit selection geologist well logging environmental science 861 strata stratum structural geology log analysis society iop publishing iop conf fluctuation ordovician yijianfang formation shunbei correlation uplift micritic limestone conference yijianfang...

... Abstract In order to study the principle of stratum seepage damage caused by shield tail leakage during the EPB shield tunneling in water-rich silty fine sand stratum, a targeted-designed device is used. The results of this research are as follows: (1) The soil loss after leakage could...

... publishing iop conf conference stratum loess thickness mining water-conducting fractured zone subsidence 11th Conference of Asian Rock Mechanics Society IOP Publishing IOP Conf. Series: Earth and Environmental Science 861 (2021) 052055 doi:10.1088/1755-1315/861/5/052055 Height of Water-Conducting...

... is 80m on average. The stratum has strong mechanical and chemical weathering. Mechanical weathering generally that precedes chemical weathering renders the rock mass more permeable and facilitates access for groundwater to large surface areas of rock substance [2]. Furthermore, a large proportion...

.... According to the characteristics of shield tunneling construction, to solve the problem of blind selection of shield machines in the coastal complex stratum. First of all, an evaluation index system of shield type selection and adaptability considering the design parameters, hydrogeological conditions...

...) adopted key stratum theory and "voussior beam" hypothesis to study the interaction between overlying stratums movement and mining induced pressure. Xia et al. (2017) conducted numerical simulation of the whole process of longwall mining on stope pressure in underground mining using FLAC 3D . Lai et al...

... done by visual inspection, and for determining the landslide slip surface. structural geology Artificial Intelligence Susceptibility Upstream Oil & Gas core sample magnetic susceptibility stratum drill core drill core observation core observation asian rock mechanics symposium arms8...

... reservoir criterion FEM strength reduction coalbed methane fem stength reduction theoretical solution coal seam floor plastic zone Reservoir Characterization stratum coal seam gas limit state floor failure reduction face wall failure simulation Failure Simulation in the Coal Seam Floor...

... . The tunnel goes with a frequent change of sections, the biggest section is 14.2mxI0.678m(width × height). 2.2 Engineering Geology and Hydrology The interval is located at the middle and lower reaches of spine of Yong Ding River's alluvial fan, belongs to Quaternary Period stratum. The surface is asphalt...

... ABSTRACT: Considering existed problems of support design in Jinchuan nickel mine, this paper probes into a method of reliability analysis of stability for support design of large span roadways in fractured stratum and in high stress field. First, failure features of fractured rock masses...