外文翻译-千万吨级矿井综采工作面的开采工艺性评价.doc

1、翻译部分英文原文Fuzzy evaluation on coal seam geological condition of coal face in ten million ton MineAbstract：Based on coal seam geological condition in Jisan Mine，quantitative evaluation on concrete coal seam geological condition is made by using fuzzy evaluation with the view of coal mining and coal fac

2、e production.The evaluation content and its realization of coal seam geological condition，the structure and the index system of evaluation factor，the membership functions and weights of evaluation factor ，evaluation model and reliability are expounded in detail ，eighty-two coal face that will be exp

3、loited is classified，Fuzzy evaluation is the basal work to select coal mining technology and ensure a ming running efficiently，safely and steadily.Key words：fuzzy evaluation；membership function1 INTRODUCTIONWith the development of mining ，the difference of coal seam geological conditions will affect

4、 the suitability of coal mining technology and coal face outputs ，i.e. qualification and economic indicator.To ensure a mining running efficiently，safely and steadily ，coal seam geological conditions must be known roundly and detailed .Fuzzy evaluation on coal seam geological conditions is a evaluat

5、ion on concrete coal seam geological condition with the comprehensive view of coal mining. The main characteristic of evaluation is that a coal face is a evaluation cell.The aticle tells of fuzzy evaluation on coal seam geological conditions in Jisan Mine.2 CONDITIONS OF SEAM AND GEOLOGYThere are th

6、ree sections that are exploited in Jisan Mine， i.e. north sectioneast sectionwest section，they belongs to Sanxia coal seam. Sanxia coal seam is at the bottom of Shanxizu， mean thickness of coal seam is 5.26 metres，from east to west in Mine， thickness of coal seam reduce from 5 metres to 3.5 metre. R

7、ock character of roof is sandrock or siltite， rock character of bottom is siltite or thin sandrock. There are many faults in Jisan Mine，there are fourteen faults that their drops are bigger than twenty metres， and there are many smaller faults. Based on the coal seam geological conditions，strike lon

8、gwall mining method in fully mechanized coalface is adopted.3 FACTORS AND INDEX OF EVALUATION3.1 STRUCTURE OF EVALUATION FACTORSAccording to the principle of system， feasibility and simplicity， based on coal seam geological characteristic ，the structure of evaluation factors is figure 3.1.It consist

9、s of seven compound factors and eleven smaller factors， these factors are quantified by fault density q1fault length exponent q2fault fall exponent q3variation of coal seam and band coefficient seam thickness mseam angle seam hardness Rimmediate roof hardnessratio of immediate roof and seam mining t

10、hickness Nfalse roof thickness h0immediate bottom hardness qccoal face length l and coal face advance lengths.Fault effectC1Variabi-lity ofSeam thicken-ssC2Seam thickessC3Seam angle C4Seam hardnessC5Imm-ediate roof hard-nessC6Main roof hold-ing pow-er C7False roof hardnessC8Bot-tom hardnessC9Coal fa

11、ce leng-thC10Coal face adve-nceC11Complex degree of geologic structureB1Seam stabilityB2Seam thicknessB3Seam angleB4Seam haren-essB5Seam roof and bottom conditionB6Coal faceB7Evaluation on coal seam geological conditions of coal face A Figure 3-1 structure of evaluation factors of coal face3.2 INDEX

12、 SYSTEM OF EVALUATIONExplanation of eleven smaller evaluation factors is as follows：(1) fault effect： describing fault effect on mining needs three index， fault density-fault number in unit area； fault length-sum of fault length in unit area； fault fall exponent-ratio of fault fall and seam thicknes

13、s.(2) variation of coal seam and band coefficient： ratio of seam thickness sample standard deviation and seam thickness mean.(3) Seam thickness： seam sample thickness mean.(4) Seam angle： seam sample angle mean.(5) Seam hardness： seam compression strength.(6) Immediate roof hardness： immediate roof

14、compression strength.(7) Main roof holding power：(8) False roof effect： false roof thickness.(9) Immediate bottom hardness： immediate roof compression strength.(10) Coal face length(11) Coal face advance 3.3 MEMBERSHIP FUNCTIONS OF EVALUATION FACTORSThe membership function of evaluation factor is th

15、e quantitative description on fuzzy relationship between the change of a geological factor and the mining effect. Membership function is the foundation to build a fuzzy evaluation model.Adopting statistic analogism method， method of undetermined coefficients and heterogeneous fuzzy statistic method， membership functions are obtained as follows：（1）membership function of fault effecta=2/ （1+exp（0.0018+0.042q1+0.064q2+0.00071q3）（2）membership function of variation of coal seam and band coefficient（3）membership function of seam thickness（4）membership function of seam angle（5）member