Version 1.3.0 - September 2025
                        
                            New Features
                            
                                - Batch selection and editing of blast holes
 
                                - full screen mode canvas
 
                            
                            
                            Improvements
                            
                                - Optimized calculation algorithms for better accuracy
 
                                - Optimized PDF export rendering
 
                            
                            
                            Bug Fixes
                            
                         
                    
                    
                        Version 1.2.0 - January 2025
                        
                            New Features
                            
                                - Fragmentation analysis module for detailed fragmentation effect prediction
 
                                - Enhanced tunnel design interface with support for complex geometric shapes
 
                                - Batch import functionality with Excel file support
 
                                - Design template library with common blasting patterns
 
                            
                            
                            Improvements
                            
                                - Optimized calculation engine performance (30% faster response)
 
                                - Improved mobile user interface experience
 
                                - Enhanced data export functionality with multiple formats
 
                                - Reduced memory usage and improved page load times
 
                            
                            
                            Bug Fixes
                            
                                - Fixed chart display issues in certain browsers
 
                                - Resolved timeout issues during large file uploads
 
                                - Fixed user permission validation vulnerabilities
 
                                - Corrected calculation result precision issues
 
                            
                         
                    
                    
                        Version 1.1.5 - December 2024
                        
                            Improvements
                            
                                - Enhanced void ratio calculator user interface
 
                                - Optimized blasting simulation visual effects
 
                                - Improved data saving reliability
 
                            
                            
                            Bug Fixes
                            
                                - Fixed occasional user login state loss issues
 
                                - Resolved interface display anomalies on certain devices
 
                                - Fixed data export format issues
 
                            
                         
                    
                    
                        Version 1.1.0 - November 2024
                        
                            New Features
                            
                                - Vibration analysis module
 
                                - Design sharing functionality
 
                                - PDF report export capability
 
                                - User permission management system
 
                            
                            
                            Improvements
                            
                                - Redesigned blast hole editor interface
 
                                - Optimized database query performance
 
                                - Enhanced error handling and user feedback
 
                            
                         
                    
                    
                        Version 1.0.5 - October 2024
                        
                            Improvements
                            
                                - Optimized page loading speed
 
                                - Improved mobile device compatibility
 
                                - Enhanced security measures
 
                            
                            
                            Bug Fixes
                            
                                - Fixed user registration validation issues
 
                                - Resolved data saving failure problems
 
                                - Fixed calculation result display errors
 
                            
                         
                    
                    
                        Version 1.0.0 - September 2024
                        
                            Initial Release
                            
                                - Blast hole design functionality
 
                                - Tunnel design tools
 
                                - Void ratio calculator
 
                                - User account system
 
                                - Basic data management
 
                                - Responsive web interface
 
                            
                         
                    
                    
                        Planned Features
                        
                            Coming Soon
                            
                                - 3D visualization for blasting design
 
                                - Real-time collaboration features
 
                                - Mobile application
 
                                - Advanced analysis reports
 
                                - API interface availability
 
                                - Multi-language support
 
                            
                         
                    
                    
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