The present invention relates to a Raise Caving mining method for mining ore from an ore body comprising developing at least two slots (3a, 3b) in a rock mass and leaving a pillar (9a) of rock mass to separate adjacent slots (3a, 3b) in order to create a favourable stress environment in the rock mass to provide protection for mining infrastructure, developing at least one production raise (6a) within the rock mass providing the favourable stress environment, mining by progressing upwards at least one production stope (13a) from the at least one production raise (6a), and drawing ore from the production stope (13a). The present invention also relates to a Raise Caving mining infrastructure, a machinery, a monitoring system, an automatic or semi-automatic control system of a Raise Caving mining infrastructure, and a data medium.

Methods and systems for rock recognition are provided. In one embodiment, a method comprises: receiving or generating, at one or more computing systems, data comprising at least one drilling variable for a plurality of drilled holes across observations at a plurality of depths, wherein the at least one drilling variable is a variable affected by at least one physical characteristic of rock in the plurality of drilled holes; determining, by the one or more computing systems, a plurality of characteristic measures for each of the plurality of drilled holes, wherein the plurality of characteristic measures for each drilled hole comprise: at least one characteristic measure of a first type, wherein a characteristic measure of the first type is a measure based on a comparison of a distribution of a said at least one drilling variable for the drill hole with a distribution of a related or the same drilling variable across a plurality of the drilled holes; and at least one characteristic measure of a second type, wherein a characteristic measure of the second type is based on said at least one drilling variable across the plurality of depths of the drilled hole; applying, by the one or more computing systems, unsupervised learning to the plurality of characteristic measures, the unsupervised learning determining groups of the drilled holes; and generating, by the one or more computing systems, an output indicating the determined groups of the drilled holes.

An I-patterned filling method for an initial stage of coal mining based on roof fracture characteristics is provided. A relationship between an overburden load borne by a main roof and an overhang size is determined based on principle of virtual work and a surgery theory when an overhang distance of the main roof reaches an initial weighting interval to enter a plastic limit state with an advance of a working face to obtain the initial weighting interval. An initial fracturing interval of an immediate roof is obtained in the same way. According to a subsidence law of the main roof in an inverted hip roof form, the filling is performed at a key position around an internal plastic hinge line through I-patterned three-strip filling. Size parameters of the I-pattered filling are designed to prevent the immediate roof and the main roof from being fractured.

The disclosure provides a real-time monitoring system and a real-time monitoring method for coal mine roof fractures during a roadway tunneling process, where the monitoring system includes a roadway model building module for building a three-dimensional model of a roadway; a roof monitoring module for obtaining roof fracture development data in real time; a fracture analysis module for obtaining a development pattern of roof fractures according to the three-dimensional model of the roadway and the roof fracture development data; a fracture formation prediction module for judging a fracture formation time according to the development pattern of the roof fractures; and an early warning processing module for early warning according to the fracture formation time.

The disclosure provides a real-time monitoring system and a real-time monitoring method for coal mine roof fractures during a roadway tunneling process, where the monitoring system includes a roadway model building module for building a three-dimensional model of a roadway; a roof monitoring module for obtaining roof fracture development data in real time; a fracture analysis module for obtaining a development pattern of roof fractures according to the three-dimensional model of the roadway and the roof fracture development data; a fracture formation prediction module for judging a fracture formation time according to the development pattern of the roof fractures; and an early warning processing module for early warning according to the fracture formation time.

An I-patterned filling method for an initial stage of coal mining based on roof fracture characteristics is provided. A relationship between an overburden load borne by a main roof and an overhang size is determined based on principle of virtual work and a surgery theory when an overhang distance of the main roof reaches an initial weighting interval to enter a plastic limit state with an advance of a working face to obtain the initial weighting interval. An initial fracturing interval of an immediate roof is obtained in the same way. According to a subsidence law of the main roof in an inverted hip roof form, the filling is performed at a key position around an internal plastic hinge line through I-patterned three-strip filling. Size parameters of the I-pattered filling are designed to prevent the immediate roof and the main roof from being fractured.

Disclosed are a method and a related device for determining a development status of a separation layer in a coal mine. The method includes: obtaining surface subsidence variation data of the coal mine within a preset time interval, rock stress variation data of a caving zone of the coal mine and water pressure variation data; determining a height decrease of the caving zone based on the rock stress variation data and the water pressure variation data; and determining the development status of the separation layer of the coal mine based on the height decrease and the surface subsidence variation data.

The present disclosure provides a method and system for monitoring a coal shearer status based on digital twinning, and an electronic device, and relates to the technical field of real-time status monitoring. The method includes: obtaining physical parameters, real-time driving data, and real-time status data of a coal shearer physical entity, where the physical parameters include geometric parameters, material properties, and positional parameters; the real-time driving data includes a real-time position, a real-time speed, and a real-time angle of a rocker arm; and the real-time status data includes real-time vibration information; building a coal shearer digital twin model on a Unity3D engine according to the physical parameters of the coal shearer physical entity; and updating a status of the coal shearer digital twin model based on the real-time driving data and the real-time status data. The present disclosure achieves visual monitoring of a coal shearer status.

An apparatus and method for assisting design of charging and blasting of stopes in an underground stope excavation is provided. The apparatus includes a data processing device and is provided with data on realized drill holes drilled for the stope. The apparatus is also provided with data on an initial free space located below the stope. The apparatus assists in dividing an initial first stope ring into several blast sections, which are blasted in several partial blasts towards an available free space. The apparatus estimates volumes of rock materials, compares the estimated volumes to available free volumes and then examines whether the selected blast section fits in blasted expanded state into the available free space.

The present disclosure provides a method comprising determining an ore map for a heap to identify a location of a recoverable metal value in the heap, delivering a leaching solution from a leaching solution source to a leaching solution regulating system, regulating at least one of a pressure, a mass flow rate, or a volumetric flow rate of the leaching solution to achieve a first target operational condition, wherein the first target operational condition is selected to optimize a set of operational parameters to maximize recovery of the recoverable metal value, delivering the leaching solution at the first target operational condition from the leaching solution regulating system to a subsurface leaching distribution system, and delivering the leaching solution at the first target operational condition from the subsurface leaching distribution system to the location of the recoverable metal value under a surface of the heap to leach and recover at least one metal value.