Dynamic Rockburst Simulation Method for Deep Mining Safety
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Solution Overview
Problem
Current experimental methods for simulating rockbursts in deep mines primarily use static loads, failing to adequately replicate the dynamic disturbances caused by excavation or blasting, leading to insufficient understanding of rockburst mechanisms and increased safety risks during deep mining operations.
Innovation Solution
An experimental method involving rock samples with through or half holes, subjected to initial static stresses and dynamic loads to simulate the disturbances of excavation, blasting, or earthquakes, allowing for the observation of spalling phenomena and further damage, with adjustable stress and load parameters to replicate real-world conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static loads are used to simulate rockburst, then the experimental setup is simple, but the simulation accuracy is insufficient to replicate real rockburst mechanisms
Solution Approach 1:
The patent transitions from static loading to dynamic loading systems that can apply time-varying stress waves to rock samples. The dynamic loading device generates shock waves and stress waves that replicate the actual rockburst conditions, transforming the experimental approach from static to dynamic to achieve realistic simulation.
Solution Approach 2:
The patent employs vibration and shock wave generation mechanisms to simulate the dynamic disturbance conditions that cause rockbursts. By applying mechanical vibrations and shock waves to the rock samples, the experiment replicates the actual rockburst mechanisms including spalling and fragment ejection, thereby improving simulation accuracy.
2Measurement precision
If dynamic loads are applied to simulate excavation and blasting disturbances, then the simulation accuracy improves, but the experimental complexity increases
Solution Approach 1:
The patent designs a multi-functional experimental system that can apply different types of dynamic loads (shock waves, stress waves, vibrations) and control various parameters (amplitude, frequency, duration). This universal device can simulate multiple rockburst scenarios including excavation-induced and blasting-induced rockbursts, reducing the need for multiple specialized equipment.
Solution Approach 2:
The patent uses intermediary elements such as loading plates, stress wave generators, and control systems that mediate between the dynamic load source and the rock sample. These intermediaries enable precise control and transmission of dynamic loads while protecting the experimental apparatus and facilitating accurate measurement of rockburst phenomena.
3Adaptability or versatility
If rock samples with holes are used to simulate tunnel conditions, then the realism of the experiment improves, but the manufacturing precision requirements increase
Solution Approach 1:
The patent focuses on creating accurate geometries only in the critical regions where holes are drilled to simulate tunnel cross-sections. The local quality principle allows the rock samples to have high precision in the hole regions while maintaining standard dimensions elsewhere, reducing overall manufacturing complexity while preserving simulation realism.
Solution Approach 2:
The patent applies partial action by creating holes with sufficient precision to capture the essential rockburst mechanisms without requiring perfect geometric accuracy throughout the entire sample. The hole dimensions and shapes are optimized to reproduce key phenomena such as spalling and stress concentration, rather than demanding exhaustive precision in all aspects of sample fabrication.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method effectively simulates rockburst phenomena, enabling the study of rockburst mechanisms and identifying weak points sensitive to excavation or blasting impacts, thereby enhancing construction safety and supporting measures to prevent rockbursts.
Implementation Method 1
loading dynamic load(s) of one direction, two directions or three directions onto the rock sample specimen by 0.5-10 minutes, so as to determine whether a spalling phenomenon appears on an internal surface of the through hole or the half hole, wherein the dynamic load(s) is used to simulate the disturbance induced by an excavation, a blasting, an earthquake or a mechanical vibration
Implementation Method 2
loading initial static stresses of three directions onto the rock sample specimen, and maintaining the initial static stresses of the three directions, to simulate a situation that an excavated tunnel suffers the static stresses
Data Source
AI summary
An experimental method for simulating an impact rock-burst, comprises the following steps: making a rock sample having a through hole or a half hole; loading initial static stresses of three directions onto the rock sample; then loading dynamic load(s) by 0.5-10 minutes, to determine whether a spalling phenomenon appears on an internal surface of the hole; if appears, and the rock sample is further damaged, determining and recording a failure course, if not appears, increasing the static stress(es) or the intensity of the dynamic load, then repeating the experiment procedure as far as the rock sample goes into the failure course, then determining and recording the failure course, and ending the expierment. The impact rockburst induced by dynamic load is simulated in the rock sample successfully, and by sudying mechanical mechanisms of the rock-burst, the present application lays foundations for gradually understanding and mastering the nature of real rock burst.