coal seam造句

1、Exploration evaluation coal seam gas is a base of coal seam gas exploration and developing.

2、Coal seam correlation and characters of coal seam in eastern depression of Liaohe basin

3、coal seam water injection

4、thickness of coal seam

5、A study on the feasibility of high seam mining in #3 thick coal seam of Wangzhuang Coal Mine

6、This paper introduces condition, coal seam form change, distribute law of rock nature and rock phase, thick coal seam collect conditim in Hegang coal filed.

7、Numerical simulation for protection scope of upper protective seam in steeply inclined multi-coal seam

8、Testing study of methane drainage by bore and hydraulic-cutting seam from low permeability coal seam

9、Analyzing the characteristic of the thickness change and coal seam formation, realize the geological original cause of coal seam thickness change.

10、Analytic method and appliction about intersection line of fault and coal seam on the conditions of same dip of fault and coal seam

11、As the soft coal seam is high gas content and low permeability. it has been difficult and key for the coal seam gas extraction.

12、Application of wave impedance inversion in coal seam thickness prediction

13、Through analysed workable coal seam change features, coal-rich zone, the distribution features of coal accumulation Center, describe the pattern of Chengzihe River Formation in Jixi coal Basin.

14、The coal and gas outburst became more and more dangerous along with the thickness of coal seam changing and increasing.

15、Research and application of complete set of technology for directional fracturing to increase coal seam permeability and eliminate coal/gas outbursts in underground coal mines

16、There are three coal mines in Xin'an Coalfield. The Shanxi group irregular(2-1) coal seam has soft roof, soft coal and soft floor.

17、The reasonable definitional feature of shallow coal seam is analyzed base on the overlying strata's composition, the activity law long-wall mining'soverlying layers and the depth of coal seam.

18、Rockburst is catastrophic failure phenomena of rock mass and coal seam.

19、In the part of west flank of Lujiatuo minefield, the normal siltstone roof of coal seam 8 changed into coarse to medium-grained sandstone, and also had phenomenon of coal seam pinch-out.

20、The prospect of the coal seam gas in the Liupanshui area is investigated in exploration and exploitation, the frustration in exploration of the coal seam gas is initiatively studied with retrospect of history of prospecting.

21、Study on fastly extincting burst technique when tunneling in soft coal seam

22、However, with the extension of mining depth, the distribution of soft coal seam has been expanding.

23、Within the north structure block, with the influence of the thin seam thickness, the thickness of the structure coal seam was relevantly thin.

24、It is concluded that the Gaussian curvature method can reflect the shape variation of coal seam curvature, and the method is effective to forecast natural fracture zones in coal seam.

25、The gaussian curvature of no . 3 coal seam in qinshui basin is calculated.

26、The technology experience of passing stone gate actual mining in combined mining thick coal seam and economic benefit in Xinan coal mine are introduced.

27、Combining with the actual situation in Qianqiu coal mine, the technology for comprehensive gas treatment in spontaneously inflammable and specially thick coal seam is introduced.

28、Through numerical simulation and analysis, the top coal movement and stress distribution in mechanized top caving mining of thick coal seam is revealed.

29、The coal transmutative degree and variational rule of coal seam physical character are different in the prospection for CBM. The situation restricted CBM industrialization in China.

30、Fully mechanized caving mining has became mining technology of high output and efficiency in thick coal seam mining.

31、The selection process and approach on mining technology and equipment in gently inclined and inclined thick coal seam are discussed.

32、The firm decommissioned the remaining two coal seam gas (CSG) wells and the land rehabilitated at costs lower than budgeted.

33、The way and principle of Gaussian curvature method for forecasting natural fracture zones in coal seam are discussed.

34、To meet the requirement of mining technology innovation, as a developing trend, mining roadways in thick coal seams of Xinglongzhuang coal mine should be totally located in coal seam.

35、Based on consideration of stress sensitivity of coal seam permeability, the single-phase flow rule of coal-bed gas in coal and cleats is studied by using non-equilibrium adsorption model.

36、The geologic factors which have effected on the well geologic structure, coal structure, coal thickness and its changes, coal seam surrounding rock and some other factors have been analysed.

37、Taking 2-2 coal seam of Halagou coal mine for example, laneway system and its interrelated parameters with short-wall and continuous mining machine in Shendong mining area were introduced.

38、Through comparing calculation of two plan which are mining overall height in one times and shise mining, the optimum one suitake for thick coal seam mining in Dongrong No. 3 Coal Mine is determined.

39、Through the way of numerical simulation and locale measurement, we found the safety utmost bedrock ply at the condition of thin bedrock and thick coal seam in Sima coal Mine.

40、It was succeeded in practical application. It is an useful exploration for the roadway stability control of fully-mechanized top-coal caving long-wall face in soft and thick coal seam.

41、"Mining above aquifer", as the main method to explore coal seams above confined aquifer, in which the determination of coal seam floor failure depth is the key factor and precondition.

42、To identify the signal of the weak reflected wave is a key problem to detect the thickness of the coal seam by using elastic wave.

43、Under gassy coal seam condition, the full-heading development is employed. Because of the fast heading a high rate of gas emission arises.

44、The interbedding natures exist not only between red sandstone, mudstone and shale but also between red beds with coal seam, magmatite, evaporite and varied rock, respectively.

45、The bolting with wire mesh is commonly used actual mining roadway of the thick coal seam, and in some cases the cabling reinforcement should be considered.

46、The result shows that the numerical simulation has truly reflected the basic law of gas flow and can predict gas flow quantity from boreholes in coal seam.

47、The principle of increasing gas emission rate by long hole blasting in the crossing hole is discussed. The radius cracked zone in coal seam caused by long hole blasting is calculated.

48、Methods to define the laneways loose zone of thick coal seam with enriched gas and spontaneous combustion is studied in the article and define the rational the length of sealed borehole.

49、The colliery, as one kind of the mine, is a kind of special geographical area, which is in large scale, wide area, big difference between geological condition and coal seam composition.

50、The change in thickness of coal seams and destruction of coal structure caused by the rheology of coal seams is the main factor causing gas outbursts of the coal mine.