【正文】 采礦輔助工程部分主要包括通風(fēng)、排水、供電等項(xiàng)。各分段與斜坡道和電梯井相通，人員、材料、設(shè)備可通過(guò)斜坡道或電梯井到達(dá)各分段，基建開(kāi)拓340m中段沿脈和通往XX山的運(yùn)輸大巷。廢石從中段廢石溜井用14t電機(jī)車(chē)運(yùn)到XX山廢石裝卸站，經(jīng)廢石主溜井直接下放到590m裝礦水平，裝箕斗后經(jīng)新主井提升至地表廢石倉(cāng)。XX寺現(xiàn)有主副井開(kāi)拓系統(tǒng)只能服務(wù)到200m中段，200m中段以下生產(chǎn)時(shí)，不再延伸現(xiàn)有主井和副井，也不開(kāi)掘主井和副井，而是利用XX山新主井提升XX寺的礦石和廢石，利用XX寺現(xiàn)有副井、新開(kāi)掘的電梯井和斜坡道下放人員、材料和設(shè)備，人員、材料和設(shè)備等從現(xiàn)有副井下放到200m中段，然后從電梯井或斜坡道運(yùn)至各分段。人員、材料、設(shè)備的提升由中央副井承擔(dān)，新主井投入運(yùn)營(yíng)后，將現(xiàn)中央主井改為風(fēng)井，由現(xiàn)中央主井、中央副井和西副井進(jìn)風(fēng)，東副井和西回風(fēng)井出風(fēng)。采礦工程擴(kuò)建項(xiàng)目以XX山礦為主，建設(shè)方案是：在現(xiàn)中央主井西北側(cè)新建一條主井，擔(dān)負(fù)全部礦石和相應(yīng)掘進(jìn)廢石的提升任務(wù)，為充分利用現(xiàn)有的溜破系統(tǒng)和340m中段井底車(chē)場(chǎng)，新主井在590m和755m設(shè)有兩個(gè)裝礦水平，410m以上生產(chǎn)時(shí)，礦石經(jīng)現(xiàn)有溜破系統(tǒng)后，下放到590m裝礦水平，經(jīng)新主井提升到地表礦倉(cāng)；廢石從各中段車(chē)場(chǎng)經(jīng)廢石溜井直接下放到590m裝礦水平，經(jīng)新主井提升至地表。工作制度：年運(yùn)行操作時(shí)間333d，每天3班，每班8h。工作制度：年工作310d，每天3班，每班8h。即7344小時(shí)。采礦車(chē)間勞動(dòng)定員855人，勞動(dòng)生產(chǎn)率為3509t/人a。產(chǎn)品質(zhì)量符合GB53489所規(guī)定的一級(jí)品標(biāo)準(zhǔn)。所產(chǎn)硫精礦除滿(mǎn)足供應(yīng)礦山硫酸廠生產(chǎn)6萬(wàn)t/硫酸所需外，其余部分和鐵精礦一并外運(yùn)銷(xiāo)售。⑵選礦選礦廠原礦處理能力為300萬(wàn)t/a，產(chǎn)品為鐵精礦、硫精礦。⑴采礦采礦生產(chǎn)規(guī)模為300萬(wàn)t/a，控制性工程留有350萬(wàn)t/a的生產(chǎn)能力。 ●硫酸廠于1999年5月建成投產(chǎn)，設(shè)計(jì)能力為年產(chǎn)100%硫酸4萬(wàn)噸，目前已達(dá)到設(shè)計(jì)能力。多年來(lái)，選礦廠基本上維持建廠時(shí)的原狀，生產(chǎn)設(shè)施和設(shè)備日漸陳舊，目前的生產(chǎn)流程難以滿(mǎn)足形勢(shì)發(fā)展的需要，表現(xiàn)較為突出的是原礦中廢石混入率高、大塊預(yù)選拋尾不完全、電耗高、設(shè)備老化、自動(dòng)化程度低等問(wèn)題。鐵精礦中含F(xiàn)e量在62%左右，硫精礦中含S量約為33～35%。2002年實(shí)際生產(chǎn)能力170萬(wàn)t/a，產(chǎn)鐵精礦80萬(wàn)t/a。%左右。2002年實(shí)際生產(chǎn)開(kāi)采原礦109萬(wàn)t/a，其中：XX山礦區(qū)86萬(wàn)t/a，XX寺礦區(qū)23萬(wàn)t/a。地 點(diǎn)：XX省XX市XXX鐵礦礦區(qū)（參見(jiàn)附圖A擬建工程地理位置圖）建設(shè)單位：XX鋼鐵集團(tuán)礦業(yè)有限責(zé)任公司●XXX鐵礦包括XX山和XX寺兩個(gè)礦區(qū)。Lesson72 A car called Bluebird “藍(lán)鳥(niǎo)”汽車(chē)Lesson71 A famous clock 一個(gè)著名的大鐘 Red for danger 危險(xiǎn)的紅色 he said, in a mournful voice,39。 I continued driving and after some time, the examiner tapped loudly. Though the sound could be heard clearly, it took me a long time to react. I suddenly pressed the brake pedal hard and we were both thrown forward. The examiner looked at me sadly. 39。I was being tested for a driving licence for the third time. I had been asked to drive in heavy traffic and had done so successfully. After having been instructed to drive out of town, I began to acquire confidence. Sure that I had passed, I was almost beginning to enjoy my test. The examiner must have been pleased with my performance, for he smiled and said, 39。s always plenty to read in the 39。 he answered.39。 Then I39。but I39?！?Not at all,39。Would you mind my ing with you ?39。 I39。 No, not at all,39。 I was just wondering how to spend the morninguntil I saw you. You39。Hullo, Elizabeth,39。 I said. 39。39。Lesson68 Persistent 糾纏不休Haroun Tazieff the Polish scientist, has spent his lifetime studying active volcanoes and deep caves in all parts of the world. In 1948, he went to lake Kivu in the Congo to observe a new volcano which he later named Kituro. Tazieff was able to set up his camp very close to the volcano while it was erupting violently. Though he managed to take a number of brilliant photographs, he could not stay near the volcano for very long. He noticed that a river of liquid rock was ing towards him. It threatened to surround him pletely, but Tazieff managed to escape just in time. He waited until the volcano became quiet and he was able to return two days later. This time, he managed to climb into the mouth of Kituro so that he could take photographsThe Hatheld Puffin is a modern aeroplane, but its designer, Mr John Wimpenny, is finding it difficult to get it off the ground. The reason for this is that this plane is also a bicycle. Its pilot has to pedal hard to get it into the air. After Mr Wimpenny had the plane built, it was tested thoroughly. In 1961, it was the first manpowered aircraft to fly half a mile. While being flown by a champion amateur cyclist in 1963, the plane crashed on an airfield. Since then, Mr Wimpenny has had it rebuilt. He has had the length of the wings increased so that they now measure 93 feetalmost as long as those of a Dakota. Many people have shown interest in this new and unusual sport. But though air cyclists may learn how to fly over short distances, and may, eventually, even get across the English Channel, it is doubtful whether they will ever cycle across the Atlantic.so it was fortunate that we didn39。Jumbo must weigh a few tons,39。guard of honour39。Last Christmas, the circus owner, Jimmy Gates, decided to take some presents to a children39。In l858, a French engineer, Aime Thome de Gamond, arrived in England with a plan for a twentyone mile tunnel across the English Channel. He said that it would be possible to build a platform in the centre of the Channel. This platform would serve as a port and a railway station. The tunnel would be wellventilated if tall chimneys were built above sealevel. In 1860, a better plan was put forward by an Englishman, William Low. He suggested that a double railway tunnel should be built. This would solve the problem of ventilation, for if a train entered this tunnel, it would draw in fresh air behind it. Fortytwo years later a tunnel was actually begun. If, at the time, the British had not feared invasion, it would have been pleted. Recently, there has again been great interest in the idea of a Channel Tunnel. If it is built, it will connect Britain to Europe for the first time in history.t. Geoffrey asked her why this was so and she told him that she did not like to see so many people laughing at him!Geoffrey Hampden has a large circle of friends and is very popular at parties. Everybody admires him for his fine sense of humoreverybody, that is, except his sixyearold daughter, Jenny. Recently, one of Geoffrey39。Firemen had been fighting the forest fire for nearly three weeks before they could get it under control. A short time before, great trees had covered the countryside for miles around. Now, smoke still rose up from the warm ground over the desolate hills. Winter was ing on and the hills threatened the surrounding villages with destruction, for heavy rain would not only wash away the soil but would cause serious floods as well. When the fire had at last been put out, the forest authorities ordered several tons of a special type of grassseed which would grow quickly. The seed was sprayed over the ground in huge quantities by aeroplanes. The planes had been planting seed for nearly a month when it began to rain. By then, however, in many places the grass had already taken root. In place o