Results 1 - 10 of 10

• Integration of Vertical and In-Seam Horizontal Well Production Analyses with Stochastic Geostatistical Algorithms to Estimate Pre-Mining Methane Drainage Efficiency from Coal Seams: Blue Creek Seam, Alabama
  7/1/2013 - Peer reviewed journal articles
  An article detailing the extent to which it can be estimated that boreholes helped to degasify the Blue Creek coal seam in Alabama in advance of mining the seam.
• In-Mine Test of the Bureau of Mines Preproduction Wireless Survey System
  1/1/1990 - Reports of Investigations
  The Bureau of Mines preproduction wireless survey system (WSS) and its performance during an in-mine test are discussed in this report. The WSS was developed to reduce downhole surveying time in order to increase the efficiency of drilling long horizont...
• Investigation of Similarities Between Methane Drainage Potential of Utah's Sunnyside Coalbed and Eastern U.S. Coalbeds
  1/1/1986 - Reports of Investigations
  An investigation of the effectiveness of methane drainage in the lower Sunnyside coalbed at Kaiser Steel Corp. Sunnyside No. 1 Mine in Utah. Most previous attempts to drain methane gas using long horizontal holes were conducted in the eastern coal provi...
• Evaluation of Safety Shutoff Valve System on Methane Gas Pipelines Under Mine Fire Conditions
  1/1/1986 - Information Circulars
  The goal of this research was to evaluate the integrity of existing shutoff valves and actuators used under high-temperature conditions in the Bureau of Mines' horizontal borehole methane drainage pipeline system and to determine system improvements.
• Degasification of the Mary Lee Coalbed, Brookwood, Ala
  1/1/1982 - Reports of Investigations
  The Bureau of Mines has developed several techniques for draining methane from coalbeds in advance of mining. Drilling long horizontal holes from an underground location is one such technique, which was successfully demonstrated in the Pittsburgh and Su...
• Degasification Study From an Air Shaft in the Beckley Coalbed
  1/1/1982 - Reports of Investigations
  The Bureau of Mines conducted research to degasify a virgin block of coal in the Beckley coalbed using long horizontal holes drilled in an array from the bottom of a ventilation air shaft. Eight horizontal holes and an in situ pressure hole were drilled...
• Methane Drainage Study Using an Underground Pipeline, Marianna Mine 58
  1/1/1981 - Reports of Investigations
  The Bureau of Mines has completed an underground degasification project in which an underground piping system was used to transport methane from the coalbed to the surface. In a 10-month period four horizontal holes were drilled to an average depth of 1...
• Methane Drainage Study in the Sunnyside Coalbed, Utah
  1/1/1978 - Reports of Investigations
  Discusses research to determine the effectiveness of long holes in degasifying an area of the upper split of the lower Sunnyside coalbed at Kaiser SteelCompany Sunnyside No. 1 mine. These holes were drilled from the two outside entries of a section that...
• Commercial-Quality Gas From a Multipurpose Borehole Located in the Pittsburgh Coalbed
  1/1/1975 - Reports of Investigations
  This report describes a multipurpose borehole used for both degasification and the production of commercial-quality gas. The multipurpose borehole was drilled into a barrier pillar, and seven horizontal degasification holes and one pressure point hole w...
• Methane Emission Rate Study in a Deep Pocahontas No. 3 Coalbed Mine in Conjunction With Drilling Degasification Holes in the Coalbed
  1/1/1972 - Reports of Investigations
  A degasification experiment was conducted in a Pocahontas No. 3 Coalbed mine in Virginia. It involved (1) drilling holes in the coalbed in the outside headings of a set of five being developed in virgin area and (2) conducting a methane emission rate st...