Abstract:
A platform, system, and method for simulating critical rock collapse of surrounding rock in underground engineering includes: four vertically arranged reaction walls defining a square reaction space, and a base mounted at a lower end opening of the wall; and a row of horizontally arranged stress loading plates at a side of each wall close to the reaction space, and a reaction beam above this space, where the reaction beam, the stress loading plate, and the base define a loading space, and the loading space is configured for placement of a surrounding rock simulation block to be tested; the stress loading plate capable of moving horizontally in a direction of the reaction wall, and the reaction beam capable of moving in a vertical direction, so as to load the surrounding rock simulation block; and the stress loading plate and the reaction beam being driven by linear motion units for movement.
Abstract:
A method, system, and computer program product for implementing automated pressure level detection and correction is provided. The method includes retrieving from sensors, measurement attributes associated with geological conditions occurring during a mining process. Subsequently, threshold levels configured to activate an alarm associated with measurement attributes exceeding the threshold levels are determined and code is executed with respect to the threshold levels. A combined threshold severity level associated with the safety threshold levels is determined and code is executed with respect to the safety threshold levels. A combined clustering level associated with the safety threshold levels is determined and a difference value between the combined threshold severity level and combined clustering level is generated. A relationship between the difference value and a threshold value is determined and automated software and hardware control systems are enabled for controlling machinery associated with the mining process resulting in operation of the machinery.
Abstract:
Described herein are new methods and systems for profiling tunnels. A method comprises moving a shuttle within a shuttle track extending between a boring apparatus (inside a tunnel) and a base station (outside the tunnel). The shuttle is equipped with a movement sensor, which records various movement parameters (e.g., linear and/or angular accelerations) while the shuttle moves within the shuttle track. These movement parameters are then transferred to a tunnel profiler (e.g., a base station) and the profile of the tunnel is determined based on these movement parameters. For example, a shuttle track can be a flexible tube (e.g., continuous or segmented) with the shuttle positioned within the tube. The shuttle can be removed from the tube or remain in the tube while the movement parameters are transferred and, in some examples, while the shuttle is recharged.
Abstract:
A method for monitoring large deformation of a surrounding rock of a tunnel based on an automatic targeting and ranging system includes: acquiring, by a camera module, a target monitoring image; identifying a center image position in the target monitoring image; performing, by a laser ranging module, an automatic targeting and ranging task according to the center image position; and calculating a deformation offset of each target of left wall targets, right wall targets and a vault target based on an automatic targeting and ranging result corresponding to the target. The method solves the problem that a laser ranging device fails to measure a target at a fixed angle and obtains a real and accurate deformation offset thereby greatly improving the reliability of the large deformation monitoring result of the surrounding rock of the tunnel.
Abstract:
A tunnel defect detection and management system based on a vibration signal of a moving train. This system identifies the defects in a subway tunnel structure and soil behind a wall through the acquisition, transmission and analysis of an on-board acceleration signal. A signal acquisition sensor is mounted on the moving train. A signal acquisition module and a signal transmission system are mounted in the train to preprocess and compress the signal. A data processing and analysis server performs data analysis to quickly identify the defects of the tunnel and the auxiliary structure thereof, and determine a defect location and type. A tunnel management platform releases real-time detection information and health status of the tunnel, alarms for the defects, and releases the defect data to relevant personnel to take measures.
Abstract:
A pressure control apparatus includes a main line section and a branch line operably joined to and extending from the main line section. A housing around the branch line has a first wall and a second wall opposed to the first wall, and a first opening is in the first wall. A plug is operably positioned in the branch line, and the plug has a first position that prevents fluid flow through the branch line and a second position that permits fluid flow through the branch line. A loop extends from the plug, and a lever pivotally connected to the second wall and extending through the loop and the first opening in the first wall positions the plug to the first and second positions.
Abstract:
An articulated liner system for the protection of mining equipment surfaces subject to impact and abrasive wear caused by the circulation, loading and/or transport of ores, having a one-piece liner mat and an anchorage assembly with a first part having one mat fastening means and a second part having at least one supporting means for the anchorage assembly. The supporting means is fixed to a reference surface of the mining equipment. The liner mat is fixedly arranged in the one mat fastening means of the first part of the anchorage assembly. The first part of the anchorage assembly is joined to the second part of the anchorage assembly, enabling the mat to be arranged over the mining equipment surface when the joint between the first and the second parts of the anchorage assembly is driven. A method of installation, maintenance and manufacture is also provided.
Abstract:
A support system, an excavation arrangement, and a process of supporting an object are disclosed. The support system includes a weight-bearing device and a camming mechanism positioned below the weight-bearing device. A downward force on the weight-bearing device at least partially secures the camming mechanism to opposing surfaces. The excavation arrangement includes a borehole, a support system positioned within and secured to the borehole, and an object positioned on and supported by the support system. The process includes positioning and securing the support system and positioning the object on the weight-bearing device.
Abstract:
A system and method for relieving hang-ups, comprising a mobile command vehicle operative to transport a robotic vehicle to a control location remote from a hang-up location; the robotic vehicle operative to advance from the control location to the hang-up location, scan the hang-up location, transmit scanning information to the command vehicle, and receive positioning commands to position the robotic vehicle for drilling into the hang-up location, implant an explosive, and withdraw.
Abstract:
A vulnerability assessment method of water inrush from an aquifer underlying coal seam includes steps of: collecting main control factors determined by geological data of a target area to be assessed; quantifying relevant data against the main control factors to form thematic maps; performing normalization processing against attribute data corresponding to the respective thematic maps; establishing databases of normalized attribute data corresponding to the normalized thematic maps by utilizing GIS; determining a weight of each main control factor based on a constant weight model; determining a variable weight of each main control factor based on a zonation variable weight model; performing composite superimposition on the normalized thematic maps of the respective single main control factors, and newly building a topological relation of the relevant data among the attribute databases for performing multi-factor fitting analysis; and establishing a vulnerability assessment model based on the zonation variable weight model.