The Fragmentation of Granite Cylinders Using High Explosives.
Crum SV; Rholl SA; Stagg MS
Proc 6th Ann Symp on Explosives & Blasting Research Soc Explosives Eng 1990 :179-192
As part of its ongoing research concerning rock fragmentation by blasting, the U.S. Bureau of Mines has undertaken a series of test blasts where six cylinder-shaped pieces of granite rock were fragmented using high explosives. The tests were intended to (1) establish a dataset that could be used in the development and verification of theoretical models that simulate rock blasting and (2) add to the fragmentation data currently being collected by Bureau researchers. The cylindrical geometry was chosen so that the fragmentation could be directly compared to two-dimensional computer simulations that assume an axisymmetric configuration as well as more sophisticated three-dimensional models. The granite cylinders, carnelian granite and charcoal granite, ranged in size from about 0.46 Meter (18 inches) to 0.58 (23 Inches) in diameter by 0.91 Meter (36 inches) to 1.52 Meters (60 inches) in length. Physical rock properties tests performed on the charcoal granite cylinders indicated that the rocks did in fact have similar physical characteristics. Petn-based detonating cord and dynamite were used as the explosive charges, and estimates of the values of some important physical properties are given. Significantly coarser fragmentation was produced from a blast that used dynamite as the explosive charge. Fragment velocities were calculated using photographic data from the sixth test, which was shot unrestrained in a quarry and filmed with high-speed cameras.
Proc. 6th Ann. Symp. on Explosives & Blasting Research. Soc. Explosives Eng., 1990, PP. 179-192
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.