How does a rock drilling rig work? The working principle of a rock drilling rig is to drill holes in various directions at any part of the tunnel section through the mutual cooperation of the thruster, drill arm, slewing mechanism and translation mechanism. Specifically, the working principle of a rock drilling rig is as follows:

　　1. Thruster: When preparing to drill a hole, it enables the rock drill to quickly drive toward (or retreat from) the working face, and gives the rock drill a certain axial thrust when drilling. The operation of the thruster should be reversible, and the axial thrust and propulsion speed it generates should be adjustable at will so that the rock drill can work under the optimal axial thrust state.

　　2. Drill arm: It is the working arm that supports the rock drill. Its structure and size, flexibility and reliability of movement, etc. will affect the scope of application and production capacity of the rock drilling rig. The movement mode of the drill arm is rectangular coordinate type. The swing arm cylinder can be used to swing the swivel sleeve and the drill arm and the support arm cylinder hinged thereon around the axis of the swivel column left and right; the support arm cylinder can be used to swing the drill arm up and down around the hinge point, so that the propeller hinged to the front end of the drill arm can be used to swing up and down and left and right.

　　3. Rotation mechanism: It can be mainly divided into swing type swivel column, spiral sub-type swivel column, and polar coordinate drill arm rotation mechanism. The structural feature of the swing type swivel column is that there is a rotatable sleeve outside the swivel column shaft. The lower end of the drill arm and the lower hinge of the support arm cylinder are respectively hinged to the sleeve, and the swing arm cylinder is used to swing the sleeve around the swivel column, thereby driving the drill arm to swing left and right.

　　4. Translation mechanism: Through the hydraulic translation mechanism, parallel drilling holes can be obtained. When the pitch cylinder and the swing angle cylinder are controlled separately, inclined holes with a certain angle can be drilled. The propeller is flipped around the axis of the cylinder by flipping the cylinder to obtain drilling holes close to the sides and bottom of the tunnel.

　　When the rock drilling rig is working, it first pushes the rock drill toward the working surface through the thruster, and then adjusts the position and angle of the rock drill through the drill arm and the slewing mechanism to align it with the drilling position. Then, the rock drill starts to work and drills holes in the rock through impact and slewing movements. During the drilling process, the flushing mechanism will continuously inject water or air into the borehole to remove rock chips and dust in the borehole. Finally, when the drilling is completed, the rock drilling rig will withdraw the rock drill from the borehole and move to the next drilling position to start a new drilling operation.