| 摘要 |
A rock avoidance control system for solid mineral mining using a forward looking rock/mineral interface (15,16) detector and controlling the miner (1 0) to cut to the detected rock/mineral interface (15,16). One or more armored gamma ray detectors (20,120) are positioned near the cutter (12) and move wi th the cuter (12) such that the angular size of the field of view is not reduce d. Angular movements of the cutter (12) are measured and used for calculating t he rock/mineral interface (15,16) location. A device is incorporated within an armored rock detector (20,120) to sense angular movements of the cutter boom (11) and to correlate changes in gamma radiation (28) to the angular movements, within selected energy ranges. The thickness of the remaining coa l (24) is calculated by measuring the rate at which the gamma radiation (28) increases. In one embodiment, rock detectors (20,120) are used to steer the cutting of the leading drum and/or the trailing drum a long-wall mining syst em.
|
