背景十九世纪初以来,芒特尔采石场就进行工业开采。由于恩德拜采石场的开采已近尾声,而布拉德盖特采石场则又位置不利以及市场需求以每年4～5％的速度增长,1971年红土(Red land)公司决定:给予资源丰富的芒特索尔采石场以大量投资,而连结谢菲尔德至伦敦的干线铁路也促成了作出此决定。采石场占地面积初定为70英亩。一台60×102英寸的Nordberg圆锥式初碎机是1973年安设的,小时产量为3000 Background From the early nineteenth century, the Mandel quarry was industrialized. As Endebe quarrying is nearing an end, while Bradgate quarries are losing ground and market demand is growing at 4 to 5% a year. In 1971, Redland decided: The rich Mount Sorl quarry has invested heavily, and the trunk rail link from Sheffield to London has also contributed to this decision. Quarry site covers an area of ​​70 acres. A 60 x 102-inch Nordberg cone primary crusher was installed in 1973 with an hourly output of 3,000