Rock Breakage Performance Characteristics of (1) Small Diameter Confined Explosive Column Charges and (2) Water Jets.
Ash RL; Summers DA
NTIS: PB/237-217 Available for Reference At Bureau Libraries :101 pages
This report (Grant No. G0122117) was written in two sections and describes the results of experimental work (1) using ammonium nitrate-fuel oil (AN-FO) in explosive charge columns with diameters of 2 inches or less and (2) on rock breakage by water jets on oriented cores of Barre granite. The explosives research shows that AN-FO can be successfully detonated in holes as small as 1/2 inch in diameter. The water jet research indicates that three to four times more rock can be removed by using the most preferred orientation of the traversing jet in relation to microfissures in Barre granite compared with the volume of rock removed using the least preferred rock orientation.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/237-217; Available for Reference At Bureau Libraries
We take your privacy seriously. You can review and change the way we collect information below.
These cookies allow us to count visits and traffic sources so we can measure and improve the performance of our site. They help us to know which pages are the most and least popular and see how visitors move around the site. All information these cookies collect is aggregated and therefore anonymous. If you do not allow these cookies we will not know when you have visited our site, and will not be able to monitor its performance.
Cookies used to make website functionality more relevant to you. These cookies perform functions like remembering presentation options or choices and, in some cases, delivery of web content that based on self-identified area of interests.
Cookies used to track the effectiveness of CDC public health campaigns through clickthrough data.
Cookies used to enable you to share pages and content that you find interesting on CDC.gov through third party social networking and other websites. These cookies may also be used for advertising purposes by these third parties.