In a significant advancement for the construction and mining industries, researchers have unveiled a groundbreaking method for improving rock-breaking efficiency through a technique known as slot-hydraulic blasting. This innovative approach was detailed in a recent study published in ‘工程科学学报’, which translates to the Journal of Engineering Science.
The study, led by Bin-wei Xia from the State Key Laboratory of Coal Mine Disaster Dynamics and Control at Chongqing University, highlights the limitations of traditional slot blasting methods that utilize air as a decoupling medium. These conventional techniques often result in lower rock-breaking efficiency due to issues such as weak shock wave generation and poor energy utilization rates. Xia emphasizes the need for a more effective solution, stating, “Improving the blasting efficiency and minimizing damage to surrounding areas are crucial for the advancement of blasting engineering.”
The researchers proposed the use of water as an uncoupling medium in the slot blasting process, capitalizing on its superior microcompressibility and energy transfer efficiency. Their experimental results were striking; the shockwave pressure generated during slot-hydraulic blasting was found to be approximately 35 times greater than that of the air-based method. This dramatic increase is attributed to the formation of high-pressure shockwaves and enhanced incident efficiency, which could revolutionize the way blasting is conducted in various sectors.
Moreover, the study revealed that the quasi-static pressure in hydraulic blasting is 37–46 times higher than that of traditional methods, with a slower pressure drop and longer pressure holding time. This means not only more effective rock fragmentation but also a reduction in the potential for excessive crushing and surrounding damage, a common concern in construction and mining operations.
The implications of this research are vast. With the construction sector constantly seeking ways to enhance efficiency while minimizing costs, the adoption of slot-hydraulic blasting could lead to significant reductions in operational expenses and project timelines. Xia notes, “Our findings provide both theoretical and experimental support for the practical application of this method, which can greatly benefit engineering projects.”
As industries continue to grapple with the challenges of efficient resource extraction and infrastructure development, this innovative blasting technique could pave the way for safer, more effective operations. The potential for improved energy utilization and reduced environmental impact positions slot-hydraulic blasting as a promising solution for future construction and mining endeavors.
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