3D Dynamic Static Load Test System for Deep Roadway Simulation
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Solution Overview
Problem
Current simulation test systems for underground engineering fail to accurately simulate the multi-directional loading and dynamic stress conditions of deep roadway surroundings, lacking the capability to replicate the real stress state and progressive fracture process of rock due to unidirectional loading and inadequate consideration of dynamic load disturbances.
Innovation Solution
A three-dimensional dynamic and static load test system comprising a mobile platform, box body, support frame, roadway excavation device, and data monitoring unit, which includes pendulum impact units, lateral and axial loading cylinders, and actuators to simulate multi-directional loading and dynamic disturbances, allowing for real-time monitoring of stress and deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If unidirectional loading is used to simulate stress environment, then the test system is simple to operate, but it cannot fully reflect the real multi-directional stress state of deep roadway surrounding rock
Solution Approach 1:
The patent transitions from unidirectional loading to multi-directional loading by introducing loading devices that can apply forces in multiple directions (vertical, horizontal, and inclined). The support frame structure enables simultaneous application of loads from different orientations, accurately replicating the complex stress state of deep roadway surrounding rock.
Solution Approach 2:
The patent incorporates both static loading devices (loading cylinders) and dynamic loading devices (impact rods with drop weights) to simulate the combined static and dynamic stress conditions. The dynamic impact rods can deliver sudden loads to simulate rock bursts and seismic events, while static cylinders maintain sustained stress levels.
2Device complexity
If existing test systems focus on static load application, then the system structure is relatively simple, but they cannot simulate the instantaneous dynamic load disturbance behavior of surrounding rock
Solution Approach 1:
The patent introduces dynamic impact loading devices consisting of impact rods that can be raised and dropped to deliver instantaneous loads. These devices simulate dynamic disturbances such as rock bursts and seismic events by creating sudden impact forces on the model roadway surrounding rock, enabling study of dynamic fracture processes.
Solution Approach 2:
The impact rods are pre-positioned and can be raised to a predetermined height before impact. This preliminary action allows control over the impact energy and timing, enabling systematic study of dynamic load effects at different stages of excavation and support installation.
3Ease of operation
If manual layered excavation is not implemented, then the experimental device is easier to operate, but it cannot reproduce the progressive fracture process of surrounding rock during excavation
Solution Approach 1:
The patent implements layered excavation by dividing the model roadway excavation into multiple sequential layers. Each layer can be excavated and supported independently, allowing observation of the progressive stress redistribution and fracture development through different excavation stages, accurately reproducing the step-by-step nature of actual roadway construction.
4Device complexity
If grouting anchor rods cannot be placed, then the experimental setup is simpler, but the system cannot study the reinforcement effect of anchor rods in deep roadway support
Solution Approach 1:
The patent designs a versatile support device that can perform multiple functions: excavation, anchor rod installation, and grouting. The support device includes drilling mechanisms and grouting systems that can install and grout anchor rods in the model roadway, enabling comprehensive study of reinforcement effects and support technology performance under various loading conditions.
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
The system effectively reproduces the excavation process and simulates the real stress state of deep roadways under combined dynamic and static loads, addressing the limitations of existing systems by providing accurate multi-directional loading and real-time monitoring of rock deformation.
Implementation Method 1
the pendulum strikes the other end of the first impact rod
Implementation Method 2
the swing rod swings relative to the support frame, and the pendulum strikes the other end of the first impact rod
Implementation Method 3
lateral loading cylinders... axial loading cylinders
Implementation Method 4
lateral actuators... axial actuators
Implementation Method 5
real-time monitoring of stress and deformation
Data Source
AI summary
A three-dimensional dynamic and static load test system for simulating deep roadway excavation and a method thereof are provided, which relates to the technical field of indoor simulation testing in underground engineering. The system includes a mobile platform, a box body, a support frame, a roadway excavation device, and a data monitoring unit. The system and method of the disclosure can reproduce the whole process of roadway excavation, simulate the multi-directional loading of deep roadway, and restore the real stress state of deep roadway under the influence of dynamic and static load superimposed disturbance. The problem of insufficient research under the condition of unidirectional static loading and lack of multi-directional dynamic and static loading in current large-scale experimental devices has been solved, and the stress and deformation of the surrounding rock of the roadway are reflected in real-time through the data monitoring unit.