The 110 mining method, an emerging and innovative nonpillar longwall mining method, can
dramatically increase coal recovery rates and reduce entry accidents. One of the core …

During underground hard‐rock mining, the drilling and blasting method currently remains
the most economical excavation method, and the rock may experience a multistrain‐rate …

Due to the limited free face in narrow-vein sto**, blasting is usually subjected to excessive
confinement effect that often result in difficulties in ore loss and dilution. The aim of this study …

When cutting roof and pressure relief, the impact of blasting is especially obvious on the
integrity of the roof of a large‐section soft‐rock roadway. The reasonable parameters of …

Multiple toxic gases, such as carbon monoxide (CO), are generated by roof-cutting blasting
(RCB) in the automatically formed roadway without coal pillars (AFRCP). To eliminate …

In order to explore the reasonable spacing of charge holes in empty‐hole directional
blasting, based on the action mechanism of empty‐hole directional blasting, the influence of …

Drilling and blasting is still the most widely used method for rock breaking in mining
engineering, underground tra c engineering, hydro-power engineering, etc. The in-situ …

Placing empty holes between charging holes is widely used in blasting engineering to
achieve directional fracture blasting. Studies have shown that the presence of a notch along …

厚层坚硬顶板切顶卸压是优化沿空留巷围岩应力和结构有效途径之一, 将导向孔应用到切顶卸压
中是新的尝试. 基于浅孔爆破沿空留巷切顶卸压机制, 利用LS-DYNA 数值模拟与理论分析相结合 …

Roof cutting pressure relief is one of effective ways for optimizing the surrounding rock stress
and structure in thick layer of hard roof, and the application of guide hole to roof cutting …