2.Rules and support ways of roadway support and wall rock common loading;巷道支护与围岩共同承载的规律与支护方式 3.Quantitative prediction and evaluation on the regularity of asymmetric damage and distortion upon broken rock mass roadways;破碎岩体巷道非对称破坏与变形规律定量预计与评价 英文短句/例句 1....
The fracture of rocks surrounding the floor roadway during the mining of the working face of a coal mine is a complicated spatiotemporal process due to the superimposed action of multiple stress fields on the surrounding rock mass. Using the surrounding
Unlike conventional long-wall mining, the roofing activity is more intense when the long-wall face passes through the abandoned roadway. Technically, the coal pillar between the abandoned roadway and the long-wall face will suddenly fail with a certain critical value of its width, leading to the...
2.Rules and support ways of roadway support and wall rock common loading;巷道支护与围岩共同承载的规律与支护方式 3.Quantitative prediction and evaluation on the regularity of asymmetric damage and distortion upon broken rock mass roadways;破碎岩体巷道非对称破坏与变形规律定量预计与评价 英文短句/例句 1....
Study on surrounding rock deformation law and support technology of mining-influenced roadway with small coal pillar in goaf. Coal Eng. 2020, 52, 53–57. [Google Scholar] Li, L.; Lai, X.; Li, Y.; Lin, H. Monitoring of roadway stress and deformation under a broken surrounding rock. J...
The roadway wall has not completely failed, but most of it has been significantly deformed and cannot be repaired. (4) D = 0.8–1, the roadway wall is broken and collapsed. 4.1.2. Drawing of P-I Diagram Based on a large number of trial calculations, hundreds of data points ...
The roadway wall has not completely failed, but most of it has been significantly deformed and cannot be repaired. (4) D = 0.8–1, the roadway wall is broken and collapsed. 4.1.2. Drawing of P-I Diagram Based on a large number of trial calculations, hundreds of data points ...
and continues to increase with and continues to increase with the distance of the face. After entering below the surface of the “1” section, the maximum shear stress of the roof increases rapidly, and the influence range is about 24 m. The maximum shear stress distribution plays a dominant...
with a width of 0~27.25 m. It is composed of broken brecciated limestone, mudstone, and carbonaceous mudstone. It is easy to loosen and break, and the local cementation is good. It is a typical thrust fault. Due to the influence of faults, there is a nappe structure with a thickness ...
When the drilling depth reaches 2.5 m, the coal body begins in a broken state. Meanwhile, the number of cracks is small, and there are few longitudinal cracks when the depth of the borehole on the side of the roadway increases to 1.5 m, as shown in Figure 7. With the increase of ...