Detecting deep mineralization from partial element concentrations in surface and near-surface samples requires detecting the signature of one geochemical process against a background that arises from many other geochemical processes. Since the last glaciation of the Canadian Shield, it is believed that only H+ can have diffused through substantial overburden, and hence that the only available s...

Shield tunnelling is used widely in constructing underground infrastructure in cities due to the ability to limit settlements and damage to existing buildings. However, in an environment with soft overburden and buildings on pile foundations, the tunnel is often designed well below the pile tip level. There are two reasons for doing this: to reduce interaction between tunnelling process and pil...

Biomaterials and sustainable resources are two complementary terms supporting the development of new sustainable emerging processes. In this context, many interdisciplinary approaches including biomass waste valorization and proper usage of green technologies, etc., were brought forward to tackle future challenges pertaining to declining fossil resources, energy conservation, and related enviro...

We recover the amplitudes of the reflectivity function obtained by wave-equation migration by compensating for the amplitude distortions created by the imaging condition and by the incomplete reflector illumination. The amplitude effects produced by the imaging condition must be taken into account even for simple velocity models, and they are perfectly compensated by a diagonal scaling in the f...

Due to its excellent effect of surface subsidence reduction, the overburden-separation grouting (OSG) technology has been widely applied green mining. However, OSG changes mine pressure, and resultant gas emission in stope remains unclear. Therefore, with 22301 working face Tunlan Coal Mine as an example, overburden deformation stress distribution absence presence were studied through numerical...

In order to analyze the deformation of old goaf in Dameidong Coal Mine and its influence on surrounding rock soil layer, it provides guidance for prevention control geological disasters region. this paper, transient electromagnetic method numerical simulation were used study law overlying strata mining area. The results detection showed that subsidence area was within range elliptical water-ric...

physical modeling for study of deep foundations can be performed in simple chambers (1g), calibration chambers (cc), and centrifuge apparatus (ng). these common apparatus face certain limitations and difficulties. recently, frustum confining vessels (fcv) have been evolved for physical modeling of deep foundations and penetrometers. shaped as the frustum of a cone, this device applies steady pr...