温斯福德盐矿目前提供英国公路防冻盐需求量的80％。1987年该矿经营者—英国化学工业公司蒙德分公司计划生产225万吨岩盐,比1986年的185万吨有所增加,其原因是全国各地方政府对岩盐的需求日益增加。为此,该公司最近外包了一项大型开拓工程,以便在现有作业处东北部的惠特克夫劳特盘区扩大房柱法开采。该工程包括掘进三条新的进路巷道,以开采1900万吨的岩盐。一对平 The Winsford Salt Mine currently provides 80% of the demand for road salt frost in the UK. In 1987, the mine operator, the British chemical company Monde, planned to produce 2.25 million tons of rock salt, up from 1.85 million tons in 1986 due to the growing demand for rock salt from various local governments across the country. To this end, the company recently outsourced a large-scale pioneering project to expand the pillar-and-pillar mining in the Whitaker Cove area north-east of the existing operations. The project includes tunneling three new roadways to extract 19 million tons of rock salt. A pair of flat