公开(公告)号：US10975694B2

公开(公告)日：2021-04-13

申请号：US16467490

申请日：2018-03-23

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING ,  SHENZHEN UNIVERSITY

发明人： Yang Ju ,  Heping Xie ,  Yong Zhang ,  Yan Zhu ,  Feng Gao ,  Xiaodong Nie ,  Changbing Wan ,  Jinxin Song ,  Chang Lu ,  Hongbin Liu ,  Zhangyu Ren

IPC分类号： E21C41/16 ,  E21C41/18 ,  E21C45/00

摘要： A mine field layout method suitable for fluidized mining of coal resources is provided. A main shaft and an air shaft are provided in the mine field, the bottom of the main shaft is located in the shallow horizontal coal seam zone, and the bottom of the air shaft is located in the deep horizontal coal seam zone. The horizontal main roadways are arranged at two boundaries along the strike of the coal seam, and inclined main roadways are arranged at two boundaries along the dip direction of the coal seam. Connecting roadways are located inside the mine field and are in communication with the horizontal main roadways. In the coal mining stage, the coal resources can be converted into the fluidized energy product and/or electricity by an unmanned automatic mining machine.

公开(公告)号：US20200241169A1

公开(公告)日：2020-07-30

申请号：US16756819

申请日：2019-04-18

申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY

发明人： Meng Li ,  Jixiong Zhang ,  A.J.S. (Sam) Spearing ,  Zhongya Wu ,  Nan Zhou ,  Feng Gao

IPC分类号： G01V99/00 ,  G06F30/20

摘要： The present invention discloses a method for determining internal stress of a solid filling material, comprising the following steps: step 1) acquiring stress data of the solid filling material, and fitting the stress-strain relationship of the solid filling material; step 2) calculating surface subsidence in the solid filling area on the basis of an equivalent mining height theory with a probability integration method; step 3) calculating the expansion height of fractured zones in the area under a solid-backfill coal mining condition; step 4) calculating the strain in the solid filling material at a distance L from the rear of the stope by combing with step 2) and step 3); step 5) calculating internal stress in the solid filling material at distance L from the rear of the working face. The present invention attains the following beneficial effects: the present invention provides a method for calculating the stress in filling mass for solid-backfill coal mining. The method is simple and practical, and is of great significance for reckoning the distribution of the stress in the surrounding rock for solid backfill mining, guiding the backfill mining support design, and enriching the backfill mining pressure theory system.