Funding for this research was provided by:
Study on Mechanism and Parameter Optimization of Carbon Dioxide Deep Hole Pre-cracking Blasting (51874234)
Study on mechanism and ultrasonic characteristics of water-gas coupling fracture propagation of coal and rock mass around the borehole (51774234)
Article History
Received: 22 January 2020
Accepted: 4 February 2021
First Online: 3 June 2021