Three-Dimensional Ventilation for 110 Mining Method
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Solution Overview
Problem
The existing 121 construction method in coal mining leaves coal pillars, resulting in resource waste and inefficient ventilation, leading to safety hazards and increased economic costs during the transition to the 110 construction method, which lacks a complete air return passage and real-time monitoring capabilities.
Innovation Solution
A three-dimensional ventilation method and system that includes an air inlet main roadway, air return main roadway, coal mining working face, and gas drainage air inlet and return roadways, with process roadways connected to form roof-cutting and roadway retaining sections, enabling a complete ventilation system and real-time monitoring during the conversion from 121 to 110 construction methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the 121 construction method is used, then roadway support is ensured through coal pillars, but resource waste increases and ventilation efficiency decreases
Solution Approach 1:
The patent extracts and eliminates the coal pillar structure from the mining system, replacing it with a self-forming roadway technology that uses roof cutting and pressure relief to create stable access roadways without requiring coal pillar support, thereby preventing resource waste while maintaining roadway reliability
Solution Approach 2:
The patent changes the structural parameters of the roadway support system by transitioning from coal pillar-based support to a self-forming roadway structure with controlled roof cutting, altering the mechanical parameters of stress distribution and support characteristics to eliminate the need for coal pillars
2Ease of manufacture
If the 121 construction method is used, then traditional ventilation paths are established, but ventilation efficiency is reduced and safety hazards increase
Solution Approach 1:
The patent introduces a three-dimensional ventilation system that utilizes the vertical space created by self-forming roadways, adding a vertical dimension to traditional horizontal ventilation paths and enabling more efficient air circulation and gas drainage throughout the mining area
3Loss of substance
If the 110 construction method is used, then resource waste is reduced and excavation rate decreases, but air return passages are incomplete and safety hazards increase
Solution Approach 1:
The patent merges the ventilation function with the roadway structure itself by integrating air return passages into the self-forming roadway design, combining what were previously separate functions into a unified system that provides both access and ventilation
Solution Approach 2:
The self-forming roadway structure serves multiple functions simultaneously: it provides access roadway, contains air return passages, and enables gas drainage, making the roadway system universal and multi-functional to ensure complete ventilation while reducing resource waste
4Productivity
If the 110 construction method is used, then excavation workload is reduced, but real-time monitoring capabilities are lost
Solution Approach 1:
The patent introduces monitoring devices and communication systems as intermediaries between the self-forming roadway structure and the control system, enabling real-time data transmission about roadway stability and environmental conditions despite the reduced physical infrastructure
Data Source
AI summary
The present disclosure relates to the technical field of mine ventilation, and in particular, to a three-dimensional ventilation method and system for mining by 110 construction method in coal and gas outburst mines. The three-dimensional ventilation method comprises: constructing a first process roadway and/or a second process roadway before stopping the working face; forming a first roof-cutting and roadway retaining section by a part of the working face track gate located in the goaf, and/or forming a second roof-cutting and roadway retaining section by a part of the working face transport gate located in the goaf during the stopping process of the working face, so that the air inlet of the first roof-cutting and roadway retaining section enters the gas drainage air return roadway through the first process roadway to form return air, and/or the inlet air of the second roof-cutting and roadway retaining section enters the gas drainage air inlet roadway through the second process roadway to form return air, the three-dimensional ventilation system is constructed by using the gas drainage air inlet roadway and the gas drainage air return roadway, during the conversion from the 121 construction method to the 110 construction method, a complete ventilation system can be formed in the roadway retaining section, real-time monitoring of the roadway retaining section can be carried while eliminating harmful gas accumulation in the retaining section.