本文關(guān)鍵詞： 動(dòng)壓巷道 錨桿支護(hù) 圍巖穩(wěn)定性 大變形　出處：《安徽理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：煤炭是我國的主要能源,隨著煤炭的不斷開采,開采深度不斷增加,煤巷支護(hù)技術(shù)就越發(fā)顯得重要。本課題以黃陵二號(hào)煤礦409輔助運(yùn)輸巷和407回風(fēng)巷開展的典型動(dòng)壓巷道具體成果為基礎(chǔ),形成針對(duì)黃陵二礦采動(dòng)巷道的合理支護(hù)技術(shù)體系。黃陵二號(hào)煤礦工作面采用“一面三巷”的巷道布置方式,分別為膠帶巷、回風(fēng)巷和輔助運(yùn)輸巷,其中輔助運(yùn)輸巷與膠帶巷之間以30m煤柱相隔,輔助運(yùn)輸巷在本工作面回采結(jié)束后,還將作為鄰近的下一工作面回風(fēng)巷繼續(xù)使用。由于受到多次采動(dòng)影響,輔助運(yùn)輸巷在二次復(fù)用期間(即作為下一工作面回風(fēng)巷時(shí))將發(fā)生劇烈變形,尤其是煤幫與底板的變形量最大將超過1000mm,導(dǎo)致巷道斷面急劇收縮,嚴(yán)重地影響了工作面的安全高效生產(chǎn)。 目前黃陵礦區(qū)整體支護(hù)技術(shù)處于普通高強(qiáng)度錨桿支護(hù)階段,高強(qiáng)錨桿支護(hù)技術(shù)對(duì)于普通煤巷支護(hù)具有一定的適應(yīng)性,但難以實(shí)現(xiàn)大跨度、大斷面、強(qiáng)采動(dòng)條件下巷道的有效維護(hù)。論文針對(duì)409輔助運(yùn)輸巷,強(qiáng)化頂部厚煤層頂板的控制,強(qiáng)化幫部圍巖控制,強(qiáng)化煤柱幫的完整性控制和承載性能。頂板及兩幫采用高強(qiáng)預(yù)應(yīng)力錨帶網(wǎng)索支護(hù),底板用快硬水泥進(jìn)行加固。409工作面回采結(jié)束后,根據(jù)輔助運(yùn)輸巷的維護(hù)狀況和礦壓觀測結(jié)果,針對(duì)局部大變形區(qū)域進(jìn)行適當(dāng)擴(kuò)刷和二次加固。論文結(jié)合407回風(fēng)巷,采用綜掘機(jī)割底,將巷道刷至設(shè)計(jì)高度。再對(duì)巷道圍巖表面進(jìn)行處理,局部出現(xiàn)巖塊兜網(wǎng)的情況,可將其放掉,再根據(jù)具體情況在該位置補(bǔ)打錨桿索,片幫處應(yīng)及時(shí)補(bǔ)打錨桿。對(duì)于已經(jīng)松弛、破斷等失效錨桿,在原位置附近補(bǔ)打單體錨桿或單體錨索。 經(jīng)過計(jì)算機(jī)數(shù)值模擬分析及實(shí)際礦壓觀測,表明支護(hù)能夠滿足掘進(jìn)與回采期間的對(duì)巷道變形控制要求,保證了巷道的穩(wěn)定性及正常使用,為工作面的安全高效回采提供了必備條件。
[Abstract]:Coal is the main source of energy in our country. With the continuous exploitation of coal, the mining depth is increasing. The technology of coal roadway support is becoming more and more important. This subject is based on the concrete achievements of the typical dynamic pressure roadway developed by 409 auxiliary transport lane and 407 return air roadway in Huangling No. 2 Coal Mine. To form a reasonable supporting technology system for mining roadway in Huangling No.2 Coal Mine. Huangling No. 2 coal face adopts "one side and three roadways" roadway layout mode, which are belt roadway, return air roadway and auxiliary transportation roadway, respectively. The auxiliary transport roadway is separated by 30m coal pillar between the belt roadway and the auxiliary transport roadway. After the mining of this working face is finished, the auxiliary transport roadway will continue to be used as the return air roadway of the next adjacent working face. The auxiliary transportation roadway will undergo severe deformation during the second reuse period (that is, as the next working face return air lane), especially the maximum deformation of coal side and floor will exceed 1000mm, which will lead to the sharp contraction of roadway section. Seriously affected the face of the safety and efficiency of production. At present, the whole support technology of Huangling mining area is in the stage of ordinary high strength bolt support. The high strength bolt support technology has certain adaptability to the ordinary coal roadway support, but it is difficult to realize the large span and large section. The effective maintenance of roadway under strong mining conditions. Aiming at 409 auxiliary transportation roadway, this paper strengthens the control of roof of thick coal seam at the top and surrounding rock control of side wall. Strengthening the integrity control and bearing capacity of coal pillar side. The roof and two sides are supported by high strength prestressed anchor with mesh and cable, and the bottom plate is strengthened with quick hard cement after mining, according to the maintenance condition of auxiliary transportation roadway and the result of observation of mine pressure, This paper combines 407 return air roadway, adopts fully-mechanized excavator to cut the bottom of roadway, brushes the roadway to the design height, and then treats the surrounding rock surface of the roadway, and the local situation of rock block draining net appears. It can be released, and then in accordance with the specific situation in the position to fill the anchor cable, the patch should be in time to make up the anchor bolt. For the already relaxed, broken and other failure of the anchor, in the original position in the vicinity of the repair of the single anchor or single anchor cable. Through computer numerical simulation analysis and actual mine pressure observation, it is shown that the support can meet the requirements of roadway deformation control during tunneling and mining, and ensure the stability and normal use of roadway. It provides necessary conditions for safe and efficient mining.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD353

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