4 results about "Slope mining" patented technology

The application discloses a kind of based on bulk body pushing prestressed end help mining chamber filling method, including bulk body broken material filling, setting gravity pile, filling paste filling layer, pushing machine heap loading, chamber wall protection, chamber mouth closure, supplementary support and the like steps.The present application does not need to construct fixed facilities, with the advantages of flexible deployment, low investment cost, etc., while effectively solving the problem that loose material cannot support roof, suitable for short service life, slope overburden resource limited open pit end temporary mining operation;The unique design of gravity pile can enhance the stability of gravity pile, increase the friction at the bottom, prevent gravity pile from slipping or overturning;Artificial segmentation is carried out on the mining chamber, blocking the flow of bulk body broken material in the filling process towards the chamber mouth direction;It is convenient for prestressed segment loading;Provide a relatively closed space for the action of paste filling layer;Bulk body broken material filling layer can not only make up the settlement deformation, but also provide supplementary support force, while not increasing filling cost too much.

The application discloses an open-pit mine dip coal seam end slope mining and filling device and a filling method. The filling device comprises a plurality of sequentially connected filling units. The filling unit comprises a frame and a filling component. The filling component is arranged in the frame. The filling component is divided into two structures. One is a bag type structure, and the other is a plate type structure. The device is convenient to assemble and simple to operate, and can be conveniently pushed into the mining tunnel. The application realizes dip coal seam mining and filling, prevents backflow of the filling material, is safe and reliable, and has high filling rate. The application can be effectively used in end slope filling mining technology for full-height and layered mining of the dip coal seam, greatly improves the filling rate of the dip coal seam filling mining, and fills the blank of the end slope filling method of the dip coal seam.

This invention belongs to the field of pre-splitting blasting technology, specifically relating to a hard rock pre-splitting blasting method using a roller cone drill rig instead of a down-the-hole drill rig. The hard rock pre-splitting blasting method includes eight stages: parameter design, drill rig preparation, hole drilling, hole acceptance, charge packing, network connection inspection, blasting implementation, and post-blast acceptance. This invention optimizes the drilling parameters of the roller cone drill rig, adjusts the pre-splitting hole network parameters, matches the charge structure and detonation method, and establishes a closed-loop process control system. This achieves efficient, precise, and low-cost application of the roller cone drill rig in hard rock pre-splitting blasting, significantly improving hole drilling efficiency and pre-splitting quality, and ensuring the safety of open-pit mine slope mining. It overcomes the shortcomings of existing down-the-hole drill rigs in hard rock (f≥10) pre-splitting blasting, such as low hole drilling efficiency, large drilling deviation, discontinuous pre-splitting, high drill bit wear, and easy drill bit jamming and rod breakage.

The present application belongs to the technical field of end slope mining surrounding rock stability monitoring, aiming to solve the problems of great difficulty in laying optical fiber in the mining tunnel and single evaluation data of surrounding rock stability. A kind of end slope mining surrounding rock stability non-access multi-field coupling test method and system is provided, the method comprises: in the process of end slope coal mining machine exiting the mining tunnel, using the on-board high-pressure gas source to launch the composite sensor probe to the deep part of the mining tunnel;Microcrack acoustic emission events are obtained by the composite sensor probe;Macroscopic displacement field data are obtained by the ground remote sensing equipment;The macroscopic displacement field data and the microcrack acoustic emission events are mapped, fused, and the surrounding rock damage variable is obtained by inversion;Based on the surrounding rock damage variable, the equivalent safety factor is obtained, and the stability of the mining tunnel surrounding rock is evaluated. The composite sensor probe can effectively solve the problem of optical fiber wall coupling in the long and narrow mining tunnel, and realize continuous and quantitative evaluation of the stability of the mining tunnel surrounding rock through multi-data fusion.