Shandong University

China Communications Construction Company Limited

Qingdao West Coast Rail Transit Co., Ltd.

Qingdao First Municipal Engineering Co., Ltd

Hebei Feipu Environmental Protection Technology Co., Ltd

Lin Xin

Wenming Zhang

Yong Zhang

Quanwei Liu

Chuan Li

Jiufang Xiong

Shibin Jiang

Lide Hou

Wensheng He

Biao Kong

Weizhou Li

Zhenbiao Wang

Hailiang Wang

Xiangbao Meng

Fu Yu

Gang Wang

Zhen Liu

Weimin Cheng

Wen Nie

Gang Zhou

Guanhua Ni

Shuai Wang

Yanbin Yu

Xuanshan Zhang

Xuexiang Xu

Xianghui Meng

Lianjun Chen

He Yang

A method of treating tunnel collapse includes leveling a collapse body and moving a pavilion support under the collapse cavity, lifting a shield plate until a lower edge of the shield plate surpasses a contour line of an initial supporting arch of a tunnel, connecting a bottom column and inserting a padding plate under a column. If the hydraulic prop retracts, the column, the bottom column, the padding plate and the hydraulic prop bear a load from the shield plate. Mounting and connecting the initial supporting arch, welding the intersection point of the column and the initial supporting arch, cutting off the column in the initial supporting arch. Transferring the load of the shield plate from the pavilion support to an initial supporting shed, spraying fast-setting concrete to a grid arch to form a closed shell, and pumping filling material to fill the space of the collapse cavity.

Method of treating tunnel collapse using pavilion support

A method of treating tunnel collapse includes mounting a shield plate, a column, a support column to form a combined support and moving the combined support onto an operation platform, lifting up the combined support, and enabling the height of canopy to be greater than the height of an initial supporting arch. Actively contacting a surface of a collapse cavity by a fixed support column and bearing a load, and lifting a movable support column to the top of the collapse cavity and bearing a load. Mounting an initial supporting arch, and welding the initial supporting arch with the support column. Removing a hydraulic prop after the support column contacting the initial supporting arch is cut off and the load of the shield plate is transferred to a supporting shed. Mounting an exhaust pipe and a filling material pumping pipe, and pumping a filling material into a collapse cavity space.

Method of treating tunnel collapse with roof-contacted shield support

Described are a test apparatus and a test method for the wetted perimeter of coal seam water injection. In the test apparatus, a columnar insulator is provided between an upper electrode and a lower electrode, circular insulating tapes are located at the outer edges of the upper electrode and the lower electrode, a circular reverse osmosis membrane is provided at the middle of the circular insulating tape, the upper electrode, lower electrode, circular insulating tapes and circular reverse osmosis membrane form an enclosed chamber which is filled with solid sodium chloride, and cotton yarns are packed among the upper resin backing plate, lower resin backing plate, circular insulating tapes and the inner walls of water permeable perforated pipes. The upper electrode is provided with an electrode lead which passes through the columnar insulator, the lower electrode and the lower resin backing plate and goes out from the tail connecting end.

Test apparatus and a test method for the wetted perimeter of coal seam water injection

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Qingdao, China

Lin Xin