21. Most of the dead were suffocated by toxic gas that spewed from the coal bed and ignited, state media reported. 22. Pennaco produces coal bed methane gas from over 400, 000 acres of land in Wyoming's Powder River Basin and Montana. 23. Continuous-type accumulations include fractured shale and fractured chalk oil and gas, basin-centered gas, coal bed gas, and tight reservoir gas. 24. An area in the vicinity of Falls Run may overlay the a coal bed known as the Buck Mountain Bed. 25. Omega also is involved in coal bed methane production in Montana, an extraction method that is opposed by environmental groups. 26. Most of the dead miners suffocated on the toxic gas that spewed from the coal bed and ignited, officials said. 27. A coal bed known as the Alton Upper Bed occurs in the vicinity of Seventy One, on the stream's western side. 28. It aims to sink 51, 000 coal bed methane wells in Wyoming over 10 years, and 26, 000 more in Montana. 29. Explosions often are blamed on lack of required ventilation equipment need to clear away gas that seeps from the coal beds . 30. Xinhua said the blast in the Xuzhou mine might have occurred in the coal bed or gas that collected in a tunnel.
