Abstract: An electronic anti-theft label of a nickel-titanium alloy temperature memory wire includes a first housing, a second housing with a boss, a locking beam, a locking catch, a rotating device, a nickel-titanium alloy temperature memory wire, and an unlocking device. The second coil on the unlocking device generates, after being energized, a magnetic field around. The second coil serving as a sending end is placed in a third groove, so that the first coil is induced to generate electricity by using the electromagnetic induction principle, and the first coil serves as a receiving end. The sending end sends an electromagnetic signal to the external environment under the action of electric power, and the receiving end receives the electromagnetic signal and converts the electromagnetic signal into current. The nickel-titanium alloy temperature memory wire is energized and heated to contract to drive the rotating device to move.

Abstract: An electronic anti-theft label of a nickel-titanium alloy temperature memory wire includes a first housing, a second housing with a boss, a locking beam, a locking catch, a rotating device, a nickel-titanium alloy temperature memory wire, and an unlocking device. The second coil on the unlocking device generates, after being energized, a magnetic field around. The second coil serving as a sending end is placed in a third groove, so that the first coil is induced to generate electricity by using the electromagnetic induction principle, and the first coil serves as a receiving end. The sending end sends an electromagnetic signal to the external environment under the action of electric power, and the receiving end receives the electromagnetic signal and converts the electromagnetic signal into current. The nickel-titanium alloy temperature memory wire is energized and heated to contract to drive the rotating device to move.

Abstract: A novel spider electronic tag includes a take-up device; and a base connected to the take-up device through a retractable steel wire rope. The take-up device includes: a housing; a take-up assembly, mounted in the housing; and a locking fastener, mounted in the housing and configured to lock the take-up assembly; the locking fastener includes: a rotating ratchet member, fixedly arranged at the top of the take-up assembly; and a leaf spring, embedded in an inner circumferential wall of the housing and configured to cooperate with the rotating ratchet member to lock the take-up assembly. The steel wire rope is passed in a listed sequence through the rotating ratchet member, the take-up assembly and the base clockwise from top to bottom, and two ends of the steel wire rope are fixed inside the rotating ratchet member, to connect the take-up device with the base.

Abstract: A novel spider electronic tag includes a take-up device; and a base connected to the take-up device through a retractable steel wire rope. The take-up device includes: a housing; a take-up assembly, mounted in the housing; and a locking fastener, mounted in the housing and configured to lock the take-up assembly; the locking fastener includes: a rotating ratchet member, fixedly arranged at the top of the take-up assembly; and a leaf spring, embedded in an inner circumferential wall of the housing and configured to cooperate with the rotating ratchet member to lock the take-up assembly. The steel wire rope is passed in a listed sequence through the rotating ratchet member, the take-up assembly and the base clockwise from top to bottom, and two ends of the steel wire rope are fixed inside the rotating ratchet member, to connect the take-up device with the base.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.