（6）工作面应具有的最小生产能力由下式计算：Qh=Qy×f/[D×(N

(6) The minimum production capacity the working face should have is calculated by the following formula: <br>Qh = Qy × f / [D × (NM) × t × K] = 2400000 × 1.5 ÷ [330 × 3 × 8 × 0.65] = 699.3t / h <br>type: Qh——¬¬minimum production capacity of working face equipment, t / h; <br>Qy ——— ¬face design annual output, 2400000t, <br>D ——— annual working system, 330d; <br>f ——— Capacity Wealth Coefficient, 1.5; <br>N——Number of daily work shifts, 3 shifts; <br>M——Daily maintenance shifts, 1 shift; <br>t——Work hours per shift, 8h; <br>K ——— Boot rate, 0.65. <br>(7) Shearer traction speed <br>Shearer average traction speed Vc <br>Vc = Qh / (60 × B × H × γ × C × K) = 5.42 <br>where: Vc ——— average cutting traction speed of the shearer, m / min; <br>Qh——the production capacity that the coal shearer should achieve, 699.3t / h; <br>H——the average mining height, which is 4m; <br>B——the depth of cut, 0.8m; <br>γ——the bulk density of the coal , 1.4 t / m³ <br>C ——— coal mining rate, 0.96; <br>K ——— effective coal cutting time utilization rate, 0.5. <br>After calculation, the average cutting traction speed of the shearer Vc = 5.42 m / min. <br>(8) Production capacity of MG300 / 730-WD type coal <br>mining machine Q mining = 60MBVmrK = 730.00t / h <br>Where: Q mining—achievable production capacity of coal mining machine, t / h <br>M—mining height at working face , M; <br>B-cutting depth, 0.8m;<br>Vm-the actual hauling speed of the shearer, 7.6m / min; <br>r-the actual apparent density of the coal, 1.37t / m³; <br>K-the mining rate of the working face, 50%; <br>calculated by the shearer The production capacity Q mining = 730t / h> Qh. MG300 / 730-WD type shearer can meet the requirements of mine design and production capacity

(6) The minimum production capacity of the work surface should be calculated by the following formula:<br>Qh-Qy x f/ (N-M) x t-K? 2400000x1.5 x 330 x 8 x 0.65?<br>Type: Qh ———, the minimum production capacity required for the face equipment, t/h;<br>Qy———, annual production of work surface design, 2.4 million,<br>D——— year working system, 330d; <br>f——— capacity-rich factor, 1.5;<br>N——— day shifts, 3 classes;<br>M——— daily maintenance class, 1 shift;<br>t——— hours per shift, 8h;<br>K——— power-on rate, 0.65.<br>(7) The traction speed of the shearer<br>Average traction speed Vc for shearers<br>Vc-Qh/(60 x B x H x X C x K) s 5.42<br>In: Vc ——— the average cut traction speed of the shearer, m/min;<br>Qh——— the production capacity to be realized by the shearer, 699.3t/h;<br>H——— average high, take 4m;<br>B——— depth, 0.8m; <br>Radon ——— coal capacity, 1.4 t/m3<br>C——— work surface recovery rate, 0.96; <br>K ——— effective coal cutting time utilization rate, 0.5.<br>The average cut traction speed of the shearer is calculated to be 5.42 m/min.<br>(8) MG300/730-WD-type shearer production capacity<br>Q pick s 60MBVmrK s 730.00t/h<br>Type: Q mining - the production capacity of the shearer can be achieved, t/h<br>M-face height, m; <br>B - Cut depth, 0.8m;<br>Vm-Shearer's actual traction speed, 7.6m/min;<br>r- coal's solid-view density, 1.37t/m3;<br>K - work surface extraction rate, 50%;<br>The calculated production capacity of the shearer is Q-mining of 730t/h-Qh. MG300/730-WD-type shearer can meet the requirements of mine design production capacity

(6) The minimum production capacity of the working face shall be calculated by the following formula:<br>Qh=Qy×f/[D×(N-M)×t×K]=2400000× One point five ÷[330×3×8× zero point six five = = 699.3t/h<br>Where: QH --- the minimum production capacity required by the equipment in the working face, t / h;<br>QY --- designed annual output of working face, 2400000t,<br>D -- annual work system, 330D;<br>F -- capacity margin coefficient, One point five ;<br>N -- number of daily operation shifts, 3 shifts;<br>M -- daily maintenance shift, 1 shift;<br>T -- working hours of each shift, 8h;<br>K -- power on rate, zero point six five 。<br>(7) Haulage speed of Shearer<br>Average haulage speed of shearer VC<br>Vc=Qh/（60×B×H×γ×C×K）＝ five point four two<br>Where: VC - average cutting traction speed of shearer, M / min;<br>QH -- the production capacity that the shearer should achieve, 699.3t/h ;<br>H - average mining height, 4m;<br>B -- cut depth, 0.8m ;<br>γ - unit weight of coal, one point four t/m³<br>C -- recovery rate of working face, zero point nine six ;<br>K -- utilization rate of effective coal cutting time, Zero point five 。<br>After calculation, the average cutting traction speed VC of the shearer= five point four two m/min。<br>(8) Production capacity of MG300 / 730-wd Shearer<br>Q mining = 60mbvmrk= 730.00t/ H<br>In the formula: Q mining - achievable production capacity of shearer, t / h<br>M - mining height of working face, m;<br>B -- cut depth, Zero point eight ｍ；<br>VM - actual traction speed of shearer, Seven point six ｍ/min；<br>R -- apparent density of coal, 1.37t/m ³；<br>K - recovery rate of working face, 50%;<br>Through calculation, the production capacity of the shearer is Q mining = 730t / H > QH. MG300 / 730-wd coal mining machine meets the requirements of mine design production capacity<br>