The stability of the gas extraction roadway is very important for safe mining coal and gas. compression arch formed by combined action prestressed bolt (cable) support surrounding rock has been widely used in engineering practice roadway. It great application value to analyze influence parameters on arch. In this paper, with deep Huainan Huaibei area Anhui Province, mechanical are measured via ...

In order to further explore the influence of reinforcement materials laying position on dynamic characteristics reinforced retaining walls, based FLAC3D finite difference methods for solving nonlinear problems, established with same size wall in practical engineering, material’s relative normalized processing, under seismic load, and panel conditions different arrangement were analyzed, horizon...

Affected by mining stress, roadways surrounding rock face problems such as serious deformation and failure difficult support. In this study, with the II2 area rise in Taoyuan Coal Mine taken engineering background, evolution laws of plastic zone rises during advance process working were explored aid FLAC3D software. The results suggested that increase significantly when distance between track i...

The process of excavating roadway, shafts, and exploiting coal seams located near the ground may cause subsidence surface, cracking, damage to structures on surface. Therefore, it is necessary rely specific conditions site calculate forecast level impact works when excavated ground. Based topographical conditions, geological hydrogeological current status technical design excavation twin inclin...

China’s shallow coal resources are gradually diminishing, and deep have slowly become the main energy source. However, destruction mechanism evolution of rock formation structure not clear, which seriously restricts exploitation utilization energy. Here, optimization physical parameters deformation law overlying in a mine Shandong Province were studied with an integrated approach including simi...

With the increase of mined-out areas and geological disasters, it is necessary to study influence range mining. Moreover, with growth in amount data, machine learning methods are commonly used predict surface subsidence. The 10 mm subsidence boundary an important indicator determine range, FLAC3D suitable for solving nonlinear large deformation problems. Therefore, can be explore relationship b...

Experimental studies show that compacted bentonite used as a backfill material for nuclear waste repository experiences strong coupling between chemical and mechanical processes. In this paper, we use dual-structure expansive soil model, referred to the Barcelona Expansive Model (BExM), predict behavior of buffer in subsurface emplacement tunnels high-level radioactive waste. After emplacement,...

Based on the special spatial position of 1–2 coal and 2–2 coal, this paper adopts a new way modeling by fish overcomes difficulty modeling, simulates influence pillar 22,206 return airway after mining seam Flac3D, studies under primary secondary mining, puts forward support scheme airway. The following conclusions are obtained: (1) After stress 22,206–return residual increased. maximum is below...