Shandong University

Bing Chen

Zhen Zhang

Zhiyuan Li

Shaojie Chen

Zhiguo Xia

Yongping Miao

Junying Wei

Yong Jian

Da Chen

Weihui Liu

Kun Dai

Zhaowen Du

Disclosed are a switch display apparatus and an assembling method thereof. The apparatus includes a display unit (), a support unit (), and a base unit () that are arranged sequentially from top to bottom. The display unit () includes a display device (), a combined lens (), and a display device and combined lens support component (). The combined lens () is located above the display device (). Both the display device () and the combined lens () are located inside the display device and combined lens support component (). The display device and combined lens support component () includes a first support part () used for providing structural support for the combined lens (), and a second support part () used for providing structural support for the display device ().

Switch display apparatus and assembling method thereof

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.

Filling mining method for fully-mechanized top coal caving working face

Growing community of inventors

Qingdao, China

Bing Chen