Patent ID: 7549709
Filing Date: 2009-06-23
Classification: E21C,E21D

Abstract:
1. A mining device in the longwall face of a mine comprising: a plurality of extraction units, which are erected adjacent to one another in the longwall face between sections; a planer that can travel along the coal face with a sensor mounted on the planer to recognize the rock, said sensor transmitting by radio the rock data recognized to an extraction control device by means of a transmitter mounted on the planer and by means of radio receivers provided along the longwall face; a chute and a conveyor running therein, which extend along the length of the longwall face between the mining machine and the extraction units; a plurality of tilting devices, wherein adjacent extraction units and chute components are allocated in groups to a tilting device each and the tilting device is connected with the extraction control device of one of the extraction units of the respective group, and wherein depending on the rock data recognized by means of the respective tilting device the chute components of the group can be raised in the sense of plunging and lowered in the sense of climbing the planer tools; a control device that has a longwall face control device at the end of the longwall face for the purpose of controlling the extracting functions of the extraction units in the sense of robbing, stepping, setting as well as extraction control devices, each of which is positionally and functionally allocated to the extraction units to convert and convey the extraction commands of the longwall face control unit; and a busbar connected, in series, with a longwall control device and the extraction control devices, wherein during the traveling past in the region of each extraction unit the rock sensor emits a measuring signal for the recognized rock for limited measuring points, and wherein the measuring signals of adjacent measuring points are evaluated regarding the prevalence of rock or coal and depending on this evaluation produces a tilting signal and it is transmitted to the tilting device common to the measuring points, in the sense of climbing when the evaluation shows the prevalence of rock at the evaluated measuring points, and in the sense of plunging when the evaluation shows the prevalence of coal at the evaluated measuring points, and wherein an inclinometer is allocated to each tilting device and wherein, an actual measured value of the inclination of the chute or chute components in the transverse direction of the excavation control device is conveyed as actual value to be compared with the tilting signal produced by the evaluation.