鋼梁
在鋼梁支持下,天篷是一個堅(jiān)實(shí)的作品和基地既可以是堅(jiān)實(shí)的一件或兩部分連接鋼筋,在后方和/或前端.在這兩種情況下一個大的開放空間,是留在中心定位雙動液壓內(nèi)存是用來推拉,分別為,鏈?zhǔn)捷斔蜋C(jī)和鋼梁整體股.這種體制也可以用來在盾牌和鋼梁盾牌.
再次,全液壓腿垂直安裝間基地和傘蓋.數(shù)目不等的雙腿從3to 6 ,但四腿chocks是目前最流行的.在大多數(shù)鋼梁支撐,有鉸之間的連接腿和樹冠之間,腿和基地.但為了增加縱向穩(wěn)定性,它是鋼筋大多是同一個方框形鋼架之間基數(shù),每腿.一條腿恢復(fù)設(shè)備安裝大約每腿在頂部的盒形鋼架.
該chocks適合中等至堅(jiān)硬頂板.當(dāng)頂板overhangs早已進(jìn)入采空區(qū),并要求誘導(dǎo)崩落,chocks可以充分利用采空區(qū).
盾牌
盾牌,一個新入職,在七十年代初期,其特點(diǎn)是增設(shè)了一個放頂盾后方年底之間基地和傘蓋.④對放頂盾,而在一般傾向,是鉸鏈聯(lián)合向樹冠和基地,使盾牌一動穩(wěn)定支持,一大優(yōu)勢超過了幀和chocks .⑤
液壓腿在盾牌一般都傾向于提供更多休憩空間,為交通.因?yàn)樘炫?放盾和基地之間相互關(guān)聯(lián),它可以抵御水平力而不彎曲雙腿.因此不像固體約束在幀/鋼梁支持,銷之間的聯(lián)系,腿部和樹冠之間,腿和基地盾牌支持,使之有可能的角度傾斜的液壓腿隨采礦臺階.⑥自只有垂直分量的液壓站壓力可承托屋頂,實(shí)際承載能力的盾也有差異與礦業(yè)的高峰.
鋼梁盾牌
該鋼梁盾相結(jié)合的特點(diǎn),該chocks和盾牌.因此,它擁有兩地優(yōu)勢.⑦
如果所有的四或六只腳都安裝之間林冠和基礎(chǔ),它是被稱為鋼梁擋箭牌.有定期的四或六腿鋼梁盾牌,其中所有的雙腿垂直與平行.另從V或X形.一些檐篷是一個單一的作品,有些是兩件與液壓內(nèi)存在鉸鏈聯(lián)合.
該座屏最高支持效率.它們是否適合堅(jiān)硬頂板.
英語翻譯
英語翻譯
Chock
In a chock support,the canopy is a solid piece and the base may be either a solid piece or two separate parts connected by steel bars at the rear and/or the front ends.In both cases a large open space is left at the center for locating the double-acting hydraulic ram which is used to push and pull,respectively,the chain conveyor and the chock in a whole unit.This setup is also used in the shields and chock shields.
Again,all hydraulic legs are installed vertically between the base and the canopy.The number of legs ranges from 3to 6,but the four-leg chocks are by far the most popular ones.In most chock supports,there are hinge joint connections between the legs and the canopy and between the legs and the base.But in order to increase the longitudinal stability,it is reinforced mostly with a box-shaped steel frame between the base and each leg.A leg restoring device is installed around each leg at the top of the box-shaped steel frame.
The chocks are suitable for medium to hard roof.When the roof overhangs well into the gob and requires induced caving,the chocks can provide access to the gob.
Shield
Shields,a new entry in the early seventies,are characterized by the addition of a caving shield at the rear end between the base and the canopy.④The caving shields,which in general are inclined,are hinge-joint to the canopy and the base making the shield a kinematically stable support,a major advantage over the frames and the chocks.⑤
The hydraulic legs in the shields are generally inclined to provide more open space for traffic.Because the canopy,caving shield,and base are interconnected,it can well resist the horizontal force without bending the legs.Thus unlike the solid constraint in the frame/chock supports,the pin connections between the legs and canopy and between the legs and the base in a shield support make it possible that the angle of inclination of the hydraulic legs varies with the mining heights.⑥Since only the vertical component of the hydraulic leg pressure is available for supporting the roof,the actual loading capacity of the shield also varies with the mining heights.
Chock Shield
The chock shield combines the features of the chocks and the shield.As such it possesses the advantages of both.⑦
If all of the four or six legs are installed between the canopy and the base,it is called a chock shield.There are regular four-or six- leg chock shields in which all legs are vertical and parallel.Others from V or X shapes.Some canopies are a single piece and some are two pieces with a hydraulic ram at the hinge-joint.
The chock shield has the highest supporting efficiency.They are suitable for hard roof.
Chock
In a chock support,the canopy is a solid piece and the base may be either a solid piece or two separate parts connected by steel bars at the rear and/or the front ends.In both cases a large open space is left at the center for locating the double-acting hydraulic ram which is used to push and pull,respectively,the chain conveyor and the chock in a whole unit.This setup is also used in the shields and chock shields.
Again,all hydraulic legs are installed vertically between the base and the canopy.The number of legs ranges from 3to 6,but the four-leg chocks are by far the most popular ones.In most chock supports,there are hinge joint connections between the legs and the canopy and between the legs and the base.But in order to increase the longitudinal stability,it is reinforced mostly with a box-shaped steel frame between the base and each leg.A leg restoring device is installed around each leg at the top of the box-shaped steel frame.
The chocks are suitable for medium to hard roof.When the roof overhangs well into the gob and requires induced caving,the chocks can provide access to the gob.
Shield
Shields,a new entry in the early seventies,are characterized by the addition of a caving shield at the rear end between the base and the canopy.④The caving shields,which in general are inclined,are hinge-joint to the canopy and the base making the shield a kinematically stable support,a major advantage over the frames and the chocks.⑤
The hydraulic legs in the shields are generally inclined to provide more open space for traffic.Because the canopy,caving shield,and base are interconnected,it can well resist the horizontal force without bending the legs.Thus unlike the solid constraint in the frame/chock supports,the pin connections between the legs and canopy and between the legs and the base in a shield support make it possible that the angle of inclination of the hydraulic legs varies with the mining heights.⑥Since only the vertical component of the hydraulic leg pressure is available for supporting the roof,the actual loading capacity of the shield also varies with the mining heights.
Chock Shield
The chock shield combines the features of the chocks and the shield.As such it possesses the advantages of both.⑦
If all of the four or six legs are installed between the canopy and the base,it is called a chock shield.There are regular four-or six- leg chock shields in which all legs are vertical and parallel.Others from V or X shapes.Some canopies are a single piece and some are two pieces with a hydraulic ram at the hinge-joint.
The chock shield has the highest supporting efficiency.They are suitable for hard roof.
英語人氣：424 ℃時間：2019-10-18 19:35:36
優(yōu)質(zhì)解答
我來回答
類似推薦
- 英語翻譯
- 英語翻譯
- 英漢互譯
- 英語翻譯
- 英語翻譯
- 我進(jìn)步了 作文 500字,急啊!
- 中國的三級階梯分別以什么（地形）為主?
- 某個自然數(shù)的個位的數(shù)是8,將這個8移到這個自然數(shù)左邊首位數(shù)前面,所構(gòu)成的新數(shù)是原數(shù)的8倍,原數(shù)最小是幾?
- 已知f(x)是定義在R上的奇函數(shù),且當(dāng)x>0時,f(x)=3x平方+2x-1,則x
- Kate is a very __(care) girl,she often gets 100 points in her Maths exams
- “露從今夜白,_____________”,用三則成語來形容他們的思鄉(xiāng)之情.
- (x+△x)^3 = x^3 + 3x^2△x + 3x△x^2 + △x^3 //怎么得出來的?按照什么公式算的
猜你喜歡
- 1how clever you ___ A are both B both are
- 2星期六沖虎(戊寅)煞南
- 3題中“某個三角形”與“某個三角形”全等用漢字表述,各邊各角是對應(yīng)的嗎?
- 4一人生在公元前5年,死于公元后45年,活了多少歲?
- 5英語祈使句句法問題
- 6看到的星星與星光
- 72002年末，一個城市城鄉(xiāng)儲蓄存款余額達(dá)147億元，比2001年末增加了32億元，增長百分之幾？
- 82.W_________ to our school.
- 9小明的儲蓄罐你有8枚一元硬幣,還有x張一元紙幣和y張5元紙幣,每種類型的紙幣至少一張,共計(jì)26元,求x和y
- 102009的三次方-2×2009的平方-2007 ÷ 2009的三次方+2009的平方-2010
- 11分子比分母大的分?jǐn)?shù)是假分?jǐn)?shù)． _ （判斷對錯）
- 12you can swim and boat in the park否定祈使句