-
公开(公告)号：US11047236B2
公开(公告)日：2021-06-29
申请号：US16622263
申请日：2018-12-25
Inventor： Shaojie Chen , Zhaowen Du , Zhiguo Xia , Zhen Zhang , Bing Chen , Zhiyuan Li , Yong Jian
Abstract: Provided is a filling mining method for a fully-mechanized top coal caving working face, which relates to the field of mining engineering technologies. The method solves the technical problems of roof control of the fully-mechanized top coal caving working face and a large ground deformation of top coal caving mining. The method includes the following steps: at step A, dividing the fully-mechanized top coal caving working face into a filling zone and a top coal caving zone along a strike of the working face, or dividing the working face into a filling zone and a top coal caving zone along a strike and an inclination of the working face; at step B, determining a cycle interval of the working face; at step C, performing supporting for the filling zone before the working face, and completing coal caving in the top coal caving zone and performing round wood supporting in the filling zone; at step D, after the filling zone reaches the filling interval, disposing a filling tarpaulin behind a hydraulic support and pumping the filling paste; at step E, repeating steps C and D to complete mining. A mining method of alternate coal caving and filling is provided to complete the filling mining of the top coal caving working face. In this way, the roof is effectively controlled, ground subsidence is reduced and advantages such as safety and high efficiency are available.
-
公开(公告)号：US11220642B2
公开(公告)日：2022-01-11
申请号：US16466810
申请日：2018-08-03
Applicant: SHANDONG UNIVERSITY
Inventor： Chunyuan Ma , Tao Wang , Binxuan Zhou , Zhen Zhang , Jiapeng Fu , Liqiang Zhang , Xiqiang Zhao , Xingxing Cheng
Abstract: A pulverized coal gasification device and process for producing high heating value coal gas with low carbon residue content includes a U-shaped coal gas generation furnace and a coal gas-semicoke separating device, and the U-shaped coal gas generation furnace consists of two section structures including high-temperature and low-temperature sections which are arranged in a U-shaped manner; the high-temperature section and the low-temperature section share an ash hopper; the high-temperature section is a downward entrained-flow bed, and the low-temperature section is an upward entrained-flow bed; and an inlet of the coal gas separating device is connected to the outlet of the low-temperature section, a solid outlet of the coal gas separating device is connected to an inlet of the high-temperature section, and a gas outlet of the coal gas separating device is connected to a coal gas waste heat utilizing and purifying system. The coal utilization rate can be greatly increased.
-
Search Results
2
records
(took 0.031 seconds)
