3results about How to "Fully exploited" patented technology

The embodiment of the invention discloses a layered interval paste filling coal mining method for a'under three 'thick coal seam, and relates to the technical field of coal filling mining, the coal mining method comprises the following steps: dividing a thick coal seam to be mined into at least two mining layers along the vertical direction; the thickness of the thick coal seam is greater than 3.5 m; all the layers are mined from top to bottom in sequence; wherein a transportation crossheading, an air return crossheading and an open-off cut of each layer are tunneled and arranged, each mining layer is divided into a plurality of branch roadways, the branch roadways are mined by adopting a coal mining method of branch roadway jump mining and paste filling, and filling mining of a lower layer is carried out after a working face of the upper layer is completely mined and a filling body reaches expected strength to form an artificial roof. The embodiment of the invention is suitable for mining the thick coal seam with the thickness of more than 3.5 m.

The invention discloses a cable bridge main tower attached landscape elevator which comprises a frame structure installed on the side face of a main tower, and the landscape elevator is arranged in the frame structure and connected with the frame structure in a sliding fit mode. The frame structure is fixedly connected with the side face of the main tower through a plurality of attachment rods. The attachment rod is a multi-section attachment rod, and the attachment rod is fixedly connected through a connecting piece; the problems that in design and construction of the suspension bridge main tower attached landscape elevator, due to the fact that the outer side face of a main tower is not vertical, the length of an attached rod is increased after the elevator reaches the top, and therefore the stability risk is increased, and the construction difficulty is increased are solved.

The application provides a horizontal well cooperative cold production method and device, and relates to the technical field of oil exploitation. The method comprises the following steps: obtaining the oil layer thickness and the formation pressure; determining the height difference between the lower horizontal well and the bottom of the oil layer and the height difference between the upper horizontal well and the lower horizontal well according to the oil layer thickness and the formation pressure; determining the horizontal distance between the adjacent upper horizontal well and the adjacent lower horizontal well according to the oil layer thickness and the formation pressure; determining the cold production position of each upper horizontal well and each lower horizontal well according to the height difference between the lower horizontal well and the bottom of the oil layer, the height difference between the upper horizontal well and the lower horizontal well, and the horizontal distance between the adjacent upper horizontal well and the adjacent lower horizontal well; determining the production pressure difference of the upper horizontal well and the lower horizontal well according to the oil layer thickness, the formation pressure and the cold production position of each upper horizontal well and each lower horizontal well; and sending a message instruction for cooperative cold production of the oil layer by each upper horizontal well and each lower horizontal well.