Coal, Pt. 1, 1991 Dec; :44-48; Pt. II, 1992 Jan; :47-51
Link
NIOSHTIC No.
10011375
Abstract
A coal-rock interface detector (cid) system is integral in providing coal seam tracking capability for mining machines. The cid system must be able to measure one or more properties of coal and adjacent formations and, subsequently, must be able to identify the geologic material being cut, to locate the coal-rock interface, and/or to determine the thickness of the coal remaining below the roof or above the floor. Various types of commercial and experimental cid systems are being used, and novel cid concepts are being investigated by the U.S. Bureau of Mines and other research organizations throughout the world. Cid systems can be used for both manually operated and computer-assisted mining equipment. More than 20 types of cid concepts have been investigated in the United States and abroad during the past 30 years. Of these, only the natural gamma radiation concept has been successful enough to be made into a commercially available system. It is being used on longwall shearers and continuous miners in britain and on some highwall mining machines in the United States. This technique is also being evaluated on a limited basis in the United States on continuous miners and longwall shearers. Technical information on some of these systems has been published, but details on other systems have been closely guarded. Consequently, it is difficult to accurately describe and assess the performance of every cid system.
Publication Date
19911201
Document Type
OP
Fiscal Year
1992
Identifying No.
OP 91-92
NIOSH Division
PRC
Source Name
Coal, Dec. 1991, PP. 44-48 (Pt. I); Jan. 1992, PP. 47-51 (Pt. II)
Links with this icon indicate that you are leaving the CDC website.
The Centers for Disease Control and Prevention (CDC) cannot attest to the accuracy of a non-federal website.
Linking to a non-federal website does not constitute an endorsement by CDC or any of its employees of the sponsors or the information and products presented on the website.
You will be subject to the destination website's privacy policy when you follow the link.
CDC is not responsible for Section 508 compliance (accessibility) on other federal or private website.
For more information on CDC's web notification policies, see Website Disclaimers.
CDC.gov Privacy Settings
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.
Thank you for taking the time to confirm your preferences. If you need to go back and make any changes, you can always do so by going to our Privacy Policy page.