This study presents a dynamical model of the attitude angles boom-type roadheader, to reveal response characteristics in steep coal seam. Based on Lagrange equation, roadheader is established, then simulation system constructed Simulink, solve model. Afterwards, calculating method cutting load proposed, formulate external loads during process. Focused seam, which dip angle 30°, solved, and solv...

The process of cutting rocks with a boom-type roadheader results in extreme dynamic loads and vibrations. Mining, especially the case hard rocks, is associated large energy consumption, which, when combined low efficiency, can lead to drilling performance. These phenomena are undesirable because excessive load leads machine durability, as well deterioration work conditions safety. Low mining ef...

The boom-type roadheader is the foremost mining equipment in coal mines. At present, automatic cutting technology still immature for adjusting speed automatically accordance with rock strength, resulting energy dissipation. In this study, we put forward a method respect to detecting geological strength index of seam profile through visual inspection, as well characterize and control head based ...

In underground excavation, where the road-headers are employed, a precise prediction of the road-header performance has a vital role in the economy of the project. In this paper, a new model is developed for prediction of the road-header performance using the non-linear multivariate regression analysis. This model is able to estimate the instantaneous cutting rate (ICR) of roadheader based on r...

Considering that the trajectory of cutting head longitudinal axis roadheader directly affects surface morphology roadway, formation mechanism outer profile roadway obtained by is analyzed, and dynamic model part was constructed. The variation law vibration swing angle under different working conditions obtained, coordinate in space system determined using robot kinematics analysis method. mathe...

Rock excavation is a basic technological operation during tunnelling and drilling roadways in underground mines. Tunnels mines are driven into rock mass, which the particular case of sedimentary rocks, often have layered structure complicated tectonics. For this reason, strata highly differentiated mechanical properties, diverse deposition patterns varied thicknesses cross sections such heading...

Roadway excavation is the leading project in coal mining, and cantilever roadheader main equipment roadway excavation. Autonomous cutting by roadheaders key to realize safe, efficient intelligent tunneling for underground roadways. In this paper, working device of a was simplified into series translation or rotation joints, spatial pose model coordinate system were established. Using homogeneou...

A method for assessing the operation of analog filters installed in measuring paths current and voltage converters power supply system a mining machine motor, using example driving unit roadheader’s cutterhead, is presented. The suggested based on identification fundamental harmonic signals from sensors observed at input output tested filters, respectively. identified parameters before after fi...