【正文】 system。負(fù)載敏感系統(tǒng)是一個(gè)具有壓差反饋，在流量指令條件下實(shí)現(xiàn)泵對(duì)負(fù)載壓力隨動(dòng)控制的閉環(huán)系統(tǒng)。Authors: Jack CaldwellSUMMARYThis review describes the use of Global Positioning System (GPS) in Mining including Mine and Ore Body Exploration, Development, Production, Closure, Reclamation, and Mine Title Application in British Columbia. The review also examines and evaluates web sites that specialize in GPS Technology, Mine Application of GPS, GPS Equipment Suppliers, and Consultants providing services in miningrelated GPS Applications. PAPERSImproving Safety of OffHighway Trucks through GPS (Dagdelen and NietoVega, Colorado School of Mines) Fatalities among equipment operators in open pit mines can be reduced if GPS technology is incorporated in their machines. Currently, GPS is being a standard ponent in truck dispatch systems and field surveying. Especially in large open pit mines, pit and dump maps are being made in real time and can be transferred directly to the onboard puters of the trucks. With differential GPS equipment on board, one can quickly determine exact coordinates of a given truck with accuracy of less than a meter and evaluate whether a given truck is dangerously close to the dumping edge of a waste dump. Fatal accidents related to dumping tasks are occurring in significant numbers. Applications for GPS on Shovels and Excavators (Seymour, C.) With high precision guidance systems for shovel and excavator buckets, the following benefits are also enumerated: 1. Accurate selective mining of mineralized horizons2. Accurately finding the low wall batter line in coal stripping operations, thus reducing overdig, or lost coal3. Accurate representation of hazardous areas, such as loaded blast areas or areas underlain by old underground workings4. Creating more even benches, thus reducing truck cycle times and wear and tear on trucks and reducing dozer and grader time on benchesA case in point is the Collinsville Coal Mine, owned by Xstrata Coal and operated by Thiess Contractors in northern Queensland. Following the introduction of a guidance system, three pits containing million cubic meters of excavatordug overburden showed an average overdig of % and underdig of %. Overburden which was moved in 12 pits dug prior to the installation of GPS guidance amounted to million cubic meters and showed an average % of overdig and % of underdig. The reduction in overdig was sufficient to pay for the systems within a few months. Thiess subsequently installed guidance systems on the three other excavators at the site.The Role of High Precision GPS Machine Guidance in Mining (Seymour and Williams, 2022) GPS technology can now locate the bucket of a shovel or the blade of a dozer to within 50 mm. Other positive outes include precise selective mining, even when the ore is visually indistinguishable from waste。 和跟蹤每件裝備的變動(dòng)。目前，GPS 已成為在卡車調(diào)度系統(tǒng)和實(shí)地測(cè)量的標(biāo)準(zhǔn)組件。創(chuàng)造更長(zhǎng)椅，從而減少了卡車的周期時(shí)間和卡車上的磨損，減少長(zhǎng)凳上推土機(jī)及平地機(jī)