Results 21 to 30 of about 361,142 (196)
“Relief-Retaining” Control Technology of Floor Heave in Mining Roadway with Soft Rock: A Case Study
Advances in Civil Engineering, 2021 The floor heave problem is one of the important factors affecting the stability and safety of surrounding rocks of roadways, especially in deep high-stress mining roadway with soft rock. The return airway of no.
Ai Chen +5 more
doaj +2 more sources
Applied SciencesUnder deep, high-intensity mining conditions, a high mineral pressure develops at the working face, which can easily cause floor heave deformation of the roadway.
Haojie Xue +6 more
doaj +2 more sources
Underground SpaceThe issue of significant floor heave deformation in gob-side entry retaining has long been a challenging problem in the context of longwall mining. This paper studies the floor heave failure mechanism and control method for gob-side entry retaining with ...
Jiong Wang +4 more
doaj +2 more sources
Floor heave mechanisms in underground coal mine roadways [PDF]
, 2019 Several underground coal mines in Australia have been experiencing excessive floor deformation in roadways, better known as floor heave. Although the phenomenon does not generally have safety implications, unexpected floor heave can cause financial losses due to production delays.
Mo, Sungsoon
openaire +3 more sources
Experimental Study on the Floor Heave and Failure Process of Rock Samples under Biaxial Step Loading
Applied Sciences, 2023 Floor heave is a typical tunnel issue in tunnelling engineering. To gain deep insights into the deformation mechanism and failure processes of floor heave at the bottom of a tunnel in layered rock, biaxial step-loading tests were conducted on rock ...
Diyuan Li +4 more
doaj +2 more sources
Floor Heave Mechanism and Anti-Slide Piles Control Technology in Deep and Large-Span Chamber
Applied Sciences, 2021 Based on plastic limit analysis, the deformation and fracture mechanism of the floor in the large-span chambers of deep mines are discussed and a similarity model test is carried out to verify the reliability of the theoretical analysis. The results show
Jian Shi, Desen Kong
doaj +2 more sources
Energies, 2020 The stability of the surrounding rock is the key problem regarding the normal use of coal mine roadways, and the floor heave of roadways is one of the key factors that can restrict high-yield and high-efficiency mining.
Xingping Lai +5 more
doaj +2 more sources
Applied SciencesThe severe floor heave in gob-side entry retaining is the major restriction factor of the wide application of pillarless mining thin coal seams. Reinforcement and stress-relief floor heave control methods are the most promising.
Ivan Sakhno +5 more
doaj +2 more sources
Applied SciencesIn recent years, the construction of new railway tunnels worldwide has become increasingly challenging due to larger cross-sections, deeper burial depths, higher in situ stress, and more complex geological conditions.
Rong Fan +4 more
doaj +2 more sources
Evolution Mechanism and Control of Floor Heave in the Deep Roadway with Retained Bottom Coal
Geofluids, 2023 Roadways with retained bottom coal are common in thick coal seam mining, and floor heaving is a prominent problem. In this study, based on the interaction between the floor and two sides of the roadway-surrounding rock, a Winkler elastic foundation beam ...
Peng Li +6 more
doaj +2 more sources