缺點:
1)采準(zhǔn)切割工程量大,并且施工機械化程度低。其底部結(jié)構(gòu)復(fù)雜,它的工程量約占整個采準(zhǔn)切割工程的一半。
2)礦石損失貧化比較大,在礦體傾角不陡、厚度不大的情況下較大些。一般礦石損失率為15~20%,礦石貧化率為20~30%。
有底柱崩落法的改進:
該方法今后的改進有下列各項:
(1)實施集中作業(yè),強化開采,推廣三強(強掘、強采、強出)經(jīng)驗;
(2)簡化采場結(jié)構(gòu),特別是簡化底部結(jié)構(gòu);
(3)采用高效率的出礦設(shè)備和鑿巖設(shè)備;
(4)振動出礦機應(yīng)用于漏孔負(fù)擔(dān)出礦量較大的有底柱崩落法中;
(5)加強礦石損失貧化管理工作;jsgfjc8788199
(6)重視地壓與回采順序的研究,掌握有底柱分段崩落法地壓活動規(guī)律。
Therefore, it can be seen that the toughness of the jade - Hetian jade, in the process of processing, plasticity is very strong,
At the same hardness or higher than that of the Mohs hardness of the gem, and Tian Yu in the process of carving, Yin line will never play from the ballast collapsed, so its fine texture, gentle. Of course, toughness hardness is also affected by jade impurities. By measuring toughness and hardness, we can also understand the impurities. This is a relatively large factor in determining the use of a piece of jade. For example, it is not very strict to make a Yushan jade or a utensil for a magazine of jade, but it requires jade to be pure and uniform when making jewelry parts.
The hardness of jade is one of the important bases for the identification of jade, and the luster of precious jade is also the basic standard for the identification of the authenticity and grade of gem stone.
Generally speaking, the brightness of gems and jades can be classified into "bright lights", "burning light", "flash" and "weak light" simply. Bright light is the strongest brightness, people must be narrowed his eyes, such as sharpening diamond total reflection surface has the brightness of this light brightness; burning light is also very high, dazzling light, after the stone polishing high hardness with burning brightness; flash is generally divided into bright glass, strong and weak flash flash, high hardness of jade is generally strong flash, low hardness of jade and stone for the weak light; low hardness of the surface polishing, with weak light intensity.
詞條
詞條說明
一.檢測目的倉儲貨架是存儲設(shè)備,是基于包裝、運輸、裝卸、分揀、信息管理是物流的六大基本功能。但在日常物流活動中,由于叉車碰撞,貨物堆放,容易導(dǎo)致貨架結(jié)構(gòu)損壞或損傷產(chǎn)生安全隱患,因此對貨架承重檢測是非常有必要的。檢測步驟現(xiàn)場提供測試的重物(砝碼、托盤等)、有校準(zhǔn)證書的電子秤(用于稱重)、叉車一臺測試步驟:1,目測貨架立柱、橫梁、銷等部位,觀察有無損壞,變形,脫落。2,測量貨架橫梁原始尺寸,并且記錄數(shù)
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絕緣工具送檢地址 合格檢驗報告申請電力安全工具檢測項目:1、使用高壓驗電器前,要按所測設(shè)備(線路)的電壓等級將絕緣棒拉伸至規(guī)定長度,選用合適型號的指示器和絕緣棒,并對指示器進行檢查,投人使用的高壓驗電器必須是經(jīng)電氣試驗合格的。2、用高壓驗電器進行測試時,必須戴上符合要求的絕緣手套;不可一個人單獨測試,身旁必須有人監(jiān)護;測試時,要防止發(fā)生相間或?qū)Φ囟搪肥鹿?;人體與帶電體應(yīng)保持足夠的安全距離,10kV
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公司名: 廣分檢測技術(shù)(蘇州)有限公司
聯(lián)系人: 周志琴
手 機: 18662248593
電 話: 18662248593
地 址: 江蘇蘇州吳中區(qū)孫武路76號萬耀產(chǎn)業(yè)園303室
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