Bolter Miner Angle Control for Coal Seam Tunneling Accuracy
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Solution Overview
Problem
Tunneling systems in coal mines suffer from low recovery rates and efficiency, with a high risk of apparatus damage due to improper cutting and drilling operations that deviate from the coal seam, often engaging with rock strata.
Innovation Solution
A tunneling system incorporating a bolter miner with a swingable cutting device and a drilling device equipped with sensors and a control system to adjust cutting angles based on drilling resistance, coupled with a bolter-integrated transportation machine, transfer machine, and belt conveyor to optimize coal extraction and minimize rock engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the cutting device operates with fixed swing angles, then the structure is simple, but the cutting accuracy deviates from the coal seam causing low recovery rate and apparatus damage
Solution Approach 1:
The patent employs a feedback mechanism where sensors detect the position of the coal seam in real-time during drilling and cutting operations. The control device receives this feedback information and dynamically adjusts the swing angles of the cutting device to maintain accurate cutting along the coal seam, thereby improving cutting accuracy while managing system complexity through automated control
Solution Approach 2:
The cutting device transitions from fixed swing angles to dynamic adjustable swing angles. The control device modifies the swing angles in real-time based on coal seam position feedback, enabling the cutting device to adapt to variations in coal seam geometry and maintain optimal cutting accuracy throughout the tunneling process
2Measurement precision
If the drilling rig drills deeper into the tunnel floor and roof, then more monitoring data is obtained, but the risk of engaging rock strata increases causing apparatus damage
Solution Approach 1:
The drilling rig performs preliminary drilling operations before the cutting device begins cutting. During this preliminary phase, sensors collect monitoring data about the coal seam position and characteristics. This advance detection allows the system to prepare appropriate cutting parameters and swing angles, ensuring the cutting device operates within the coal seam boundaries and avoids damaging the apparatus by engaging rock strata
Solution Approach 2:
Sensors mounted on the drilling rig continuously monitor drilling parameters such as resistance, depth, and position. This feedback information is transmitted to the control device, which uses it to determine the exact boundaries of the coal seam and adjust subsequent cutting operations accordingly, preventing the cutting device from penetrating into rock strata and protecting the apparatus from damage
3Productivity
If the cutting device swing angles are dynamically adjusted, then the recovery rate improves, but the control system complexity increases
Solution Approach 1:
The control device receives real-time feedback from sensors about the coal seam position and automatically adjusts the cutting device swing angles accordingly. This closed-loop control system improves recovery rate by ensuring accurate cutting along the coal seam while managing complexity through automated algorithms that process sensor data and generate control commands
Solution Approach 2:
The control system performs self-adjustment of cutting parameters based on sensor feedback without requiring manual intervention. The system autonomously processes monitoring data, determines optimal swing angles, and executes adjustments, thereby improving productivity while containing complexity within the automated control architecture
4Productivity
If the tunneling system uses traditional fixed apparatus, then the device complexity is low, but the tunneling efficiency is reduced due to frequent apparatus damage
Solution Approach 1:
The patent merges the drilling rig and cutting device into an integrated tunneling system with a unified control device. The drilling rig performs preliminary detection and the cutting device executes cutting operations based on detected coal seam boundaries. This integration improves tunneling efficiency by coordinating detection and cutting operations, while the shared control architecture manages system complexity through centralized control logic
Solution Approach 2:
The control device serves multiple functions: it processes sensor data from the drilling rig, determines coal seam boundaries, calculates optimal swing angles, and controls the cutting device operation. This multi-functionality improves tunneling efficiency by consolidating control tasks into a single system while managing complexity through integrated software modules that handle different control functions
Data Source
AI summary
A tunnel tunneling system includes a bolter miner, a bolter-integrated transportation machine, a transfer machine, a self-moving tail and a belt conveyor. The bolter miner includes a rack, a cutting device, a drilling device and a control device. The cutting device is arranged on the rack and is swingable in an up-down direction, and has a lowest swing angle and a highest swing angle. The drilling device is arranged on the rack, and includes a drilling rig and a sensor. The drilling rig is configured to drill a tunnel floor and/or a tunnel roof, and the sensor is configured to monitor a set parameter of the drilling rig and generate a monitoring data signal when the drilling rig is drilling. The control device is configured to receive and analyze the monitoring data signal.