Web12 de abr. de 2024 · To propose a support stiffness based method for improving the stability of coal wall, static stiffness of the support and fracture development of the coal … Web20 de out. de 2024 · Research on underground coal mines has primarily focused on the stability of roadways. Mining activities lead to significant damage to the surrounding rocks and also degrade the support to the roadways. Considering the 21309 roadway of the Huojitu coal mine as a case study, this work comprehensively analyzed the …
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Web10 de mar. de 2024 · Roof accidents at the longwall face are caused mostly by hydraulic support failure at the roof, which manifests as roof leakage, coal wall spalling, support crushing, and others, as shown in Fig. 2. The support parameters, support state, adaptability to surrounding rock fractures, and instabilities of the hydraulic support are … Web@article{osti_7015557, title = {How to determine yield load of longwall roof supports}, author = {Peng, S S and Wu, J and Li, H C and Chen, S L}, abstractNote = {Ever since … WebFAMUR is an experienced and recognized manufacturer of powered supports, gathering brands such as FAZOS, GLINIK and TAGOR. We offer a wide range of line (face), transition, end and gate roof supports. Our powered roof supports are adapted to work in all longwall mining technologies used in modern mining industry (not only coal mining) … make your snow blower throw farther