coal seam造句
1. Coal seams intermixed with iron ore.
2. The average UK coal seam is one metre thick.
3. He proposes that the coal seams should be worked in the advance.
4. The buried trees became coal seams and the mud and sands turned to shale and sandstone.
5. Table 3. 2 provides individual estimate for gaseous coal seams with the geometric mean used wherever a wide spread is given.
6. In areas of shallow coal seams and dried out peat deposits, fires can smoulder below ground level for years.
7. Beneath them the coal seams are buried and preserved for our miners today.
8. The sedimentary rocks, with their coal seams, have been folded and faulted.
9. Coal Mine, its coal seam is easily spontaneous fire.
10. The spontaneous combustion of coal seam of the major problems in safe production of coal mine.
11. The paper introduces some mining measures in soft coal seam of Linnanchang Mine and soft floor by leaving top coal. The measurements ensure safety mining.
12. Grave protrusion coal seam tunnelling hydraulic cutting protrusion - dispelling measures is a new technology in the world.
13. Li Mingchao Coal seam gas and its reconnoiter and exploitation. Beijing: Geology Publishing House, 1996.
14. The migrating methane by cross - borehole in coal seam is used in this condition.
15. The 10th coal seam floor's water invasion coefficient for region of interest is calculated by use of the modificatory water invasion coefficient computing formula.
16. The geological controls on content and producibility of coal seam gas are studied.
17. Exploration evaluation coal seam gas is a base of coal seam gas exploration and developing.
18. The spontaneous combustion of coal seam endangers the safe production.
19. To solve strata pressure control of shallow coal seam with thick sand and thin bedrock, in-situ observation was carried out in Baoshan mine 6101 fully mechanized coalface, which is the first coalface.
20. They plan to pump a suspension of catalysts in steam and air or hydrogen, down into a coal seam.
21. Claystones and siltstones containing finely dispersed coaly matter are considered to be good sources - besides many coal seams.
22. Within the north structure block, with the influence of the thin seam thickness, the thickness of the structure coal seam was relevantly thin.
23. From Hales method, reversed refracted wave method shows accuracy and efficiency in detecting the thickness of remained coal seam.
24. The authors used the Analytic Hierarchy Process ( AHP ) in the researches of coal seam floor water - irruption.
25. Discussion feasibility on using light hydraulic support from the practice of coal seam in Duerping mine.
26. On a global scale, there are many coalfields suffered from spontaneous combustion of coal seam problems.
27. The paper held that the two leg shield caving powered support would not be suitable for the top coal caving mining in the hard coal seam and the joint crack undeveloped medium hard seam.
28. The relationships between the permeability of the methane gas in coal seam and surface fractal dimension and tortuosity fractal dimension are proposed based on fractal theory and Darcy Law.
29. The determination of damage height of superincumbent stratum of goaf has immense meaning for safety and reasonable exploitation of coal seam under water body, building and railway.
30. The research results provided stable theoretical basis for high gas coal seam fully-mechanized face gas dynamic disaster control.
12