公开(公告)号：US11377952B2

公开(公告)日：2022-07-05

申请号：US16973771

申请日：2019-10-08

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY

发明人： Nan Zhou ,  Jixiong Zhang ,  Hao Yan ,  Meng Li ,  Jiaqi Wang

IPC分类号： E21C47/02 ,  E21F1/04 ,  E21C41/28

摘要： Provided is a method for radially mining open-pit end slope pressed coal, including: L-shaped or U-shaped main tunnel arrangements, and radially mining; branch tunnels are formed by excavating tunnels in directions perpendicular to or obliquely crossing the main tunnel from the L-shaped or U-shaped main tunnel; In the mining method, a coal mining system and a transportation system both adopt a remote control mode, a tunneling machine excavates a tunnel to product coal; a rubber belt conveyor conveys coal; the main tunnel adopts an exhaust ventilation mode, the branch tunnels adopt a blowing ventilation mode; the lengths of the branch tunnels do not exceed a farthest control distance of a remote control system; the length of each main tunnel needs to ensure that all the end slope pressed coal is mined under the premise that the branch tunnels do not exceed the farthest control distance of the remote control system.

公开(公告)号：US11143025B2

公开(公告)日：2021-10-12

申请号：US16608920

申请日：2019-04-01

申请人： China University of Mining and Technology ,  Xuzhou Zhongkuang Backfilling & Mining Technology Co., Ltd.

发明人： Jixiong Zhang ,  Qiang Zhang ,  Zhongyu Wu ,  Feng Ju ,  Jiaqi Wang ,  Yang Chen

IPC分类号： E21F15/00 ,  E21C41/18 ,  E21C39/00 ,  E21F15/06

摘要： A mine exploitation method based on stoping, separation and filling control is disclosed herein. The method includes deploying a gangue-less coal mining system; choosing a suitable coal and gangue separation method according to a separation requirement; choosing a suitable filling method according to mine geology, production conditions and rock stratum control requirement; reversely calculating a filling rate according to gangue discharge requirement and control indexes by utilizing theoretical calculation, simulation and experiment; determining a filling process and a separation process according to the filling rate; and feeding back and adjusting the filling process and separation process parameters by monitoring filling and control effect indexes.

公开(公告)号：US11313226B2

公开(公告)日：2022-04-26

申请号：US16603832

申请日：2019-02-22

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY

发明人： Nan Zhou ,  Jiaqi Wang ,  Jixiong Zhang ,  Kai Sun ,  Meng Li

IPC分类号： E21F15/00 ,  E21C41/18 ,  E21D15/00 ,  E21D15/02 ,  G06Q50/02

摘要： An internally injected replacement support room-type coal pillar recovery method is provided. During the recovery, the room-type coal pillars with an aspect ratio greater than 0.6 are divided into two parts: reserved coal pillars and pre-mined coal pillars. After the mining of the pre-mined coal pillars, a cemented filling material is injected into a goaf surrounded by the reserved coal pillars, and is stabilized to replace the coal pillars for support, and the reserved coal pillars are recovered. A mechanical model of the reserved coal pillars in a support overburden stage is established based on the Winkler beam theory, to obtain displacement and stress conditions of a roof of the reserved coal pillar in a support stage. A theoretical reserve-width of the reserved coal pillars is obtained according to a first strength theory of the roof and a criterion of ultimate strength of the reserved coal pillars.