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1. The coal bed has better capacity of storing gas.

2. Coal Bed Methane (CBM) is one kind of clean-burning gas. It has been valued as a new energy which will be used widely in the near future.

3. The hydro - geological parameters of age coal bed 3 of Dongtan Coal Mine be calculated with it.

4. Owing to the effect of backwall pressure, make coal bed cutting strength occur variation.

5. BP is working with PetroChina to assess coal bed methane potential in western Xinjiang province.

6. The coal bed methane utilization can be formed a new economic grow point.

7. Reserves of coal, coal bed methane gas, bauxite, refractory clay, potassic rock and so on rank first in China.

8. The United States is technically advanced in coal bed methane drilling.

9. Burnt rock is come into being coal bed self-ignite and bring wall rock metamorphose and has special engineering geological characteristics.

10. A new national coal bed gas resources evaluation was carried out by the China National Administration of Coal Geology from 1995 to 1998.

11. Coal bed gas is a new clean source, and is very abundant in our country.

12. Preliminary research on structural law of coal bed beneath nappe in No.

13. Coal bed methane is a new kind of energy emerging in the past 20 years.

14. Hydraulic fracturing has been unsuccessful because of coal bed and soft formation in Baolang Oilfield.

15. Roadway heading is the forerunner for clearly knowing coal bed geological conditions.

16. Because this coal bed thickness is moderate, selects the shield type hydraulic pressure support.

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17. There is plentiful coal bed gas resource in JiXi Coaifield.

18. The invention relates to a physical simulation device and a simulation method for coal bed methane production.

19. The caving reasons of the rib area in front of supports is analyzed, at the fully mechanized caving coal face, in the hard roof, soft coal, soft bottom and large inclination thick coal bed.

20. Hanzhuang mine field, Yangquan area is in an advantageous geographical position, the condition for coal bed methane (CBM) surface development is better.

21. The main selections of underground storage are depleted reservoir, deep brine reservoir, unworkable coal bed and deep sea etc.

22. The SO2 concentration in the combustion gas above the coal bed also firstly rises, thendeclines along the traveling grate and reaches maximum near the midpoint of the grate.

23. The reflection amplitude has amplification effect on velocity change of coal, which conduces to detecting coal bed methane by using amplitude attributes.

24. In order to improve power performance, save energy, and reduce exhaust emission of the coal bed methane engine, the accuracy of air-fuel ratio must be improved.

25. Graphite deposit of Heye was formed by metamorphism of the Permian coal bed.

26. The result of simulation showed that the gas production in low-permeability coal bed could increase greatly by drilling pinnate horizontal multilateral wells.

27. This paper introduces the characteristics, reserves, productivity, consumption and perspective of high calorific value gas fuel, and introduces the nature gas, the coal bed gas and the gas-hydrate.

28. During the process of CBM development, well testing, as the means for formation parameters and the quantitative and qualitative evaluation to coal bed, is an important link.

29. This paper apply economic geology and geographic information system basic principle, taking small blue well field 7 coal bed geological condition as object of study.

30. The porosity and permeability of coal-bearing strata have important influence to the exhaust and mining of coal bed gas , but the production of coal bed gas is precondition of its richen.