การพัฒนาเทคนิคการระเบิดที่เกิดแรงสั่นสะเทือนต่ำสำหรับการระเบิดเปลือกดินที่เหมืองแม่เมาะ การไฟฟ้าฝ่ายผลิตแห่งประเทศไทย

Abstract

This research aims to develop low-vibration blasting techniques that can apply to blast overburden at EGAT-Mae Moh mine, Lampang Province. The blast induced ground vibration data were collected from different blasting techniques such as stem plug blasting, air deck blasting, deck charged blasting and waveform interference blasting. Ground vibration was measured in peak particle velocity, ppv, and collected at 300 and 500 meters behind or beside workface. Average of several data for each blasting techniques were used for comparison. The result showed that, in comparing to conventional blasting technique, stem plug blasting could reduce ground vibration by 11-45%. Thus air deck blasting could reduce by 34-54%. While deck charged blasting could reduce by 31-47% and finally waveform interference application blasting could reduce by 41-68%.