Aiming at surrounding rock damage induced by dynamic disturbance from blasting excavation of rock-anchored beam in rock mass at moderate or far distance in underground cavern. numerical model of different linear charging density and crustal stress in underground cavern is established by adopting dynamic finite element software based on borehole layout. charging. and rock parameter of ... https://fitnessgravesyardes.shop/product-category/left-pulse-sensor-wire/