Abstract: An efficient and energy-saving blasting method based on a notched blast hole includes forming a cutting hole, an auxiliary hole, and a peripheral hole on a surface of an area to be blasted separately by means of a drilling apparatus. The cutting hole, the auxiliary hole, and the peripheral hole are formed on the surface of the blasting area separately, and notches with different numbers are formed on outer sides of the holes separately, such that in a blasting process, explosion energy of explosives can be transmitted along the notches, the explosion energy is guided, energy loss is reduced, blasting efficiency is improved, thus a range of a crushing area is reduced, a length of a main crack is increased, and a better blasting effect is achieved. Moreover, explosive energy is concentrated on the notch to initiate crack, so as to reduce an explosion smash area.

Abstract: A data synchronization method, device, equipment, system and storage medium. Including: if a first data packet received by a slave device from a master device during a current Bluetooth low energy (BLE) connection interval is a new data packet, the slave device generates a hardware synchronization signal, which is a synchronization signal generated by a pure hardware circuit; if a data synchronization time of the slave device with the master device is a preset time in the current BLE connection interval, then the slave device performs data synchronization with the master device at the data synchronization time through triggering by the hardware synchronization signal.

Abstract: Methods and systems are provided for inverted detection and positioning of a strip-like subterranean tunnel in a mountain mass, pertaining to the field combining theories of the discipline of geophysics and remote sensing technology.

Abstract: A data synchronization method, device, equipment, system and storage medium. Including: if a first data packet received by a slave device from a master device during a current Bluetooth low energy (BLE) connection interval is a new data packet, the slave device generates a hardware synchronization signal, which is a synchronization signal generated by a pure hardware circuit; if a data synchronization time of the slave device with the master device is a preset time in the current BLE connection interval, then the slave device performs data synchronization with the master device at the data synchronization time through triggering by the hardware synchronization signal.

Abstract: An anchor rod multi-section reaming machine tool and an application thereof are provided. The machine tool is used cooperatively with an anchor rod drill rig. A hydraulic cylinder is fixed at a lower end of a drill rod of the anchor rod drill rig. A lower end of the piston rod is fixed at an upper portion of an arch pressing device fixing disc. An arch pressing device comprises a pair of upper arch arms and a pair of lower arch arms, upper ends of the upper arch arms are rotatably connected with a central position of a lower portion of the arch pressing device fixing disc, lower ends of the upper arch arms are rotatably connected with upper ends of the lower arch arms, and lower ends of the lower arch arms are rotatably connected with a central position of an upper portion of a base plate.

Abstract: The invention discloses an anchor rod multi-section reaming machine tool and an application thereof. The machine tool is used cooperatively with an anchor rod drill rig (M), wherein a hydraulic cylinder (41) is connected with a hydraulic station (1) through a pipe, and the hydraulic cylinder (41) is fixed at a lower end of a drill rod (M1) of the anchor rod drill rig (M) and connected with the hydraulic station (1). A piston (412) is arranged inside a cylinder body (411) of the hydraulic cylinder (41) and axially moves relative to the cylinder body (411) such that the cylinder body (411) is divided into a hydraulic cylinder upper chamber (4111) and a hydraulic cylinder lower chamber (4112) which have variable volume.