4 results about "Stoping" patented technology

The utility model relates to the technical field of coal mine, concretely relates to a coal mine stoping working face supporting device, and the inside fixed connection of side frame has the bearing bar, and the both sides of bearing bar all have the support plate through the pin shaft rotation connection, the inside fixed connection of side frame has the support plate, and the upper portion one side with the lower portion one side of support plate all have the second air cylinder through bolt fixed connection, one side of two support plates all have the connecting plate fixed connection, and one side of two connecting plates all have the sliding block slidingly connected, the output shaft of two second air cylinders all penetrates support plate, realized the adjustability of support assembly whole height, solved the problem that the supporting device was difficult to carry out longitudinal adjustment according to roof height change in the prior art, improved the adaptive capacity of device to different mining height conditions, avoided the phenomenon of not in place or stress concentration due to height mismatch.

The application discloses a mining method for medium-length hole in inclined thick and large ore body, which divides the medium-length ore body into several panels in horizontal direction along the ore body trend and divides the medium-length ore body into several sections in vertical direction, and the ore room and the ore pillar are arranged in interval in the panel, and the ore room and the ore pillar are arranged perpendicularly to the ore body trend. During the stoping, the ore room is firstly stoped, and one section height of the ore room is stoped by using upward fan-shaped medium-length hole; after the stoping of the ore room and the filling maintenance are completed, two section heights of the ore pillar are stoped by using upward fan-shaped medium-length hole and downward fan-shaped medium-length hole; in the vertical direction, the ore room and the ore pillar are alternately upward stoped, and each time stoping is one section height ahead of the previous stoping. The stoping is performed until the panel ore body is completely stoped by using the stoping method. By using the mining method, the panel production capacity is large, and the mining method has the outstanding advantages of simple process, safe and high efficiency, low loss and low mining operation cost.

The application discloses a kind of roadway supporting method and steel shed, it is related to coal mining operation technical field, roadway supporting method, comprising the following steps: starting to drive mining face crossheading;Along the crossheading working help fixed installation first shed leg, along the crossheading non-working help fixed installation second shed leg, in the top of first shed leg and the top of second shed leg fixed installation spliced roof beam, in the splicing of spliced roof beam fixed installation reinforcing support;Lagging behind driving working face along the crossheading non-working help pouring continuous concrete wall;In the process of mining working face advancing, gradually remove first shed leg and first beam body in spliced roof beam;In the back of concrete wall excavate next section mining working face crossheading;The application is more suitable for multiple mining area roadway geological conditions, not only easy to operate, improve construction efficiency, improve the safety factor of roadway support, but also greatly improve the recycling rate of support material, reduce material waste.

This invention discloses a method and apparatus for detecting impact hazard zones in a longwall mining face based on direct current resistivity. The method includes: setting up a data measurement device in the impact hazard zone of the longwall mining face, including electrodes, measuring lines, and a measurement host; the electrodes are connected sequentially by measuring lines, and the ends of the measuring lines are connected to the measurement host; after selecting the observation device type, the measurement host emits current outward using the power supply electrodes, and the measuring electrodes receive the current emitted by the power supply electrodes, forming a covered measurement range through the emission and reception of current; the measurement host calculates the apparent resistivity distribution characteristic data within the measurement range based on the current differences received by the measuring electrodes; the apparent resistivity distribution characteristic data within the measurement range is processed according to a three-dimensional resistivity inversion algorithm to obtain the three-dimensional apparent resistivity distribution result within the measurement range; and the impact hazard level within the impact hazard zone of the longwall mining face is determined based on the three-dimensional apparent resistivity distribution result.