请英文达人好好帮我翻译一下下面的句子，谢谢啦，答得好有加分，翻译机的请绕行（会被举报的）！！！

1. Remove rock encountered in areas requiring excavation using mechanical methods (such as ripping, wedging, or impact) to reduce the rock to manageable sized fragments unless the extent and character of the rock is such that the use of explosive methods