Fracturing roofs to maintain entry (FRME) is a novel longwall mining method, which has been widely used in China, leading new revolution. In order research the change law of side abutment pressure and movement overlying strata when using FRME, monitoring device, namely, flexible detection unit (FDU), developed applied field. The results show that compared with head (also called non-splitting en...

A mechanical support in a longwall complex requires proper supervision and control of operating parameters because it is responsible for the safety machines workers. Its main functions are to protect excavation against adverse effects rock mass move along with operational progress shearer scraper conveyor. In era Industry 4.0 as well green economy sustainable development, development devices in...

A powered longwall mining system comprises three basic machines: a shearer, scraper (longwall) conveyor, and roof support. The support as component of complex has two functions. It protects the working from rocks that fall to area where machines people work transports devices in operation proceeds further into seam by means hydraulic actuators are adequately connected controlled or electro-hydr...