Coal Mine Roof Impact Simulation Platform for Hydraulic Support Loads
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Solution Overview
Problem
Current experimental devices cannot accurately simulate the influence of loose top-coal or broken immediate roofs on coal mine extraction working surfaces, which are critical for preventing roof accidents, as they lack the capability to replicate the buffer effect and varying impact loads on hydraulic supports and coal walls.
Innovation Solution
An experimental platform is designed with a base device, coal simulation device, immediate roof simulation device, hydraulic support, and removable impact device, where bulk and immediate roof simulation materials are sequentially paved in a rectangular frame, and the removable impact device impacts these materials to simulate different rupture positions and loads, allowing for accurate stress and displacement measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional experimental devices are used, then the experimental setup is simple, but they cannot accurately simulate the buffer effect of loose top-coal or broken immediate roof on hydraulic supports
Solution Approach 1:
The experimental platform is divided into multiple independent modules: coal simulation device, immediate roof simulation device, bulk simulation device, hydraulic support, and impact device. Each module can be independently configured and adjusted, allowing accurate simulation of different geological conditions while maintaining manageable system complexity through modular design.
Solution Approach 2:
The patent uses simulation materials to create simplified copies of actual coal rock structures. The coal simulation material, immediate roof simulation material, and bulk simulation material are designed to replicate the mechanical properties and behavior of real coal, rock, and loose top-coal, enabling accurate simulation without requiring actual mine conditions.
2Adaptability or versatility
If fixed impact devices are used, then the device structure is stable, but they cannot simulate rupture at different positions and varying impact loads
Solution Approach 1:
The impact device is designed with movable and adjustable components that allow dynamic configuration. The impactor can be positioned at different locations and adjusted to deliver varying impact loads, enabling simulation of rupture at different positions and different impact conditions while maintaining a relatively simple base structure.
Solution Approach 2:
The experimental platform allows changing of key parameters including impact position, impact load magnitude, immediate roof thickness, and bulk material properties. These parameter adjustments enable versatile simulation of different rupture scenarios without requiring complete redesign of the device structure.
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 platform effectively simulates the conditions of loose top-coal or broken immediate roofs, providing a buffer effect and accurately measuring stress changes on hydraulic supports and coal walls under various impact conditions, thereby enhancing safety measures for coal mine extraction by simulating different rupture positions and loads.
Implementation Method 1
the removable impact device can impact the immediate roof simulation material and the bulk simulation material
Implementation Method 2
enable a bulk simulation material and an immediate roof simulation material paved in a rectangular frame sequentially to provide a buffer effect for roof weighting of a working surface
Data Source
AI summary
The present invention provides an experimental platform for simulating a coal rock disaster of a coal mine extraction, including a base device, a coal simulation device, an immediate roof simulation device, a hydraulic support and a removable impact device. The coal simulation device is fixedly disposed on the base device; the hydraulic support is fixed on the base device and is located at one side of the coal simulation device; the immediate roof simulation device is disposed above the coal simulation device and the hydraulic support; the removable impact device is disposed above the immediate roof simulation device; the immediate roof simulation device is a rectangular frame; the rectangular frame is configured to pave a bulk simulation material and an immediate roof simulation material sequentially from the bottom up; and the removable impact device can impact the immediate roof simulation material and the bulk simulation material.