采矿专业毕业设计外文资料翻译--千万吨级矿井综采工作面的开采工艺性评价

英文原文Fuzzy evaluation on coal seam geological condition of coal face inten 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 face 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 exploited 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 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 evaluation 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 three sections that are exploited in Jisan Mine，i.e. north section﹑east section﹑west 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. Rock 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 thantwenty metres，and there are many smaller faults. Based on the coal seam geological conditions，strike longwall mining method in fully mechanized coalface is adopted.3 FACTORS AND INDEX OF EV ALUATION3.1 STRUCTURE OF EV ALUATION 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 consists of seven compound factors and eleven smaller factors，these factors are quantified by fault density q1﹑fault length exponent q2﹑fault fall exponent q3﹑variation of coal seam and band coefficient γ﹑seam thickness m﹑seam angle α﹑seam hardness R﹑immediate roof hardnessσ﹑ratio of immediate roof and seam mining thickness N﹑false roof thickness h0﹑immediate bottom hardness q c﹑coal face length l and coal face advance length s.Figure 3-1 structure of evaluation factors of coal face3.2 INDEX SYSTEM OF EV ALUATIONExplanation of eleven smaller evaluation factors is as follows：(1)fault effect：describing fault effect on mining needs three index，faultdensity-fault number in unit area；fault length-sum of fault length in unit area；fault fall exponent-ratio of fault fall and seam thickness.(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 compression strength. (7) Main roof holding power ：(8) False roof effect ： false roof thickness.(9) Immediate bottom hardness ： immediate roof compression strength. (10) C oal face length (11) C oal face advance3.3 MEMBERSHIP FUNCTIONS OF EV ALUATION FACTORSThe membership function of evaluation factor is the 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 effectμa =2/ （1+exp （0.0018+0.042×q 1+0.064×q 2+0.00071×q 3））（2）membership function of variation of coal seam and band coefficient（3）membership function of seam thickness⎪⎩⎪⎨⎧><≤+⨯-<=5.01.05.02.06.132.00.1)(000000h h h h h h μ（4）membership function of seam angle⎪⎩⎪⎨⎧≥<≤<=3N 1.03N 0.31.8 + N) Exp(-0.29 1.9-0.3N 0.05(N)μN（5）membership function of seam hardness0.17.2()0.51ln 0.917.2421.042c c R c c c c R R R R R μ<⎧⎪=⨯-≤≤⎨⎪>⎩⎪⎪⎩⎪⎪⎨⎧<≤>≥-<≤+⨯+⨯<=-8040403002.08.10.1301671.0012.01069.1ln(164.0)(24σσσσσσσσμσ（6）membership function of immediate roof hardness100010001001000.17.2)ln(5.00)(≥≤<≤⎪⎩⎪⎨⎧-=s s s s s S μ（7）main roof holding power⎪⎪⎪⎩⎪⎪⎪⎨⎧<≤+-<≤+-<≤+-<≤<≤=5036528.10286.036180.101389.018125.104167.01260.1631667.0)(R R R R R R R R R R R μ（8）false roof effect⎩⎨⎧≥<≤⨯-=25.0025.00)(21)(5.0γγγγμγ（9）immediate bottom hardness⎪⎪⎪⎪⎩⎪⎪⎪⎪⎨⎧≥<≤-⨯<≤+⨯<≤-⨯<≤-⨯<≤-⨯=1500.1150130275.00085.0130100483.0000667.0100805.00125.080607.0015.060401.0005.0)(l l l l l l l l l l l l L μ （10）coal face length⎪⎪⎪⎪⎪⎩⎪⎪⎪⎪⎪⎨⎧≥<≤<≤+⨯-<≤<≤-⨯<≤+⨯<≤-⨯<≤+⨯=0.50.10.55.470.05.45.370.12.05.38.20.18.25.252.19.05.20.243.012.00.24.123.045.04.10.105.025.0)(m m m m m m m m m m m m m m m μ （11）coal advance length⎪⎪⎪⎪⎪⎩⎪⎪⎪⎪⎪⎨⎧≥<≤<≤+⨯-<≤<≤-⨯<≤+⨯<≤-⨯<≤+⨯=0.50.10.55.470.05.45.370.12.05.38.20.18.25.252.19.05.20.243.012.00.24.123.045.04.10.105.025.0)(m m m m m m m m m m m m m m m μ 3.4 WEIGHTS OF EV ALUATION FACTORSWeight of evaluation factors is a quantity that show relative importance of per factor in system ，it is the key to unify systemic structure and function.Coam seam geological evaluation of coal face ascertains weights of evaluation factors by AHP.AHP is a easy method to quantify the quanlitative event.Appliacation of AHP needs five steps ：building hierarchical model 、constructing judgement matrix 、single hierarchy collation and consistency check 、total hierarchy collation 、consistency check of total hierarchy collation.Comfirmatiom of judgement matrix is the key to use AHP ，value of judgement matrix is the quantitative description on relative importance of per factor ，the valves are one to nine and their reciprocals.Table1 shows the value ，Table2 to 4 show judgement matrix ，Table5 shows weights of evaluation factors.Figure 3B6~C judgement matrix3.5 FUZZY EV ALUATION MODELCoal seam geological conditions are multilayered evaluated by fuzzy evaluation model，fuzzy evaluation model images single factor evaluation value to total evaluation value by certain algorithm，whether propertis of evaluation sample is bad orgood are assured by total evaluation valve ，in order to comprehesively consider effect degree of per factor ，weighted avarage evaluation model is used ，the model ：∑==⋅=ni ij i j m j r W b 1.....,1,2, In fomula ：b j ——evaluation valve ； W i ——weight matrix 。