本文選題：大采深 + 底板破壞��； 參考：《河北工程大學(xué)》2017年碩士論文

【摘要】：九龍礦建礦至今,先后有4個(gè)工作面位于野青煤層之中。每個(gè)工作面都不盡相同的有或大或小的突水。本論文以峰峰集團(tuán)九龍礦野青4號(hào)煤層15445N工作面為研究對(duì)象,該工作面平均埋深850m,屬于大采深工作面。結(jié)合九龍礦水文地質(zhì)資料及對(duì)之前野青煤層工作面的開采經(jīng)驗(yàn),采用從理論分析,到數(shù)值模擬,最后現(xiàn)場(chǎng)使用鉆孔注水法實(shí)測(cè)的研究方法過程,對(duì)可能造成15445N工作面底板破壞原因的進(jìn)行理論分析,并對(duì)工作面底板破壞深度及特征規(guī)律做了模擬預(yù)測(cè)和現(xiàn)場(chǎng)實(shí)測(cè),并得到以下成果:(1)底板破壞的原因有多種,包括底板下含水層的壓力、底板巖體的巖性搭配、節(jié)理裂隙等地質(zhì)構(gòu)造因素,還有工作面的回采工藝及工程采動(dòng)因素,這些因素柔和在一起,都是研究底板破壞所要考慮的因素。(2)使用數(shù)值模擬技術(shù),對(duì)工作面開采過程中底板不同深度應(yīng)力狀況及底板塑性變形范圍和特征進(jìn)行了模擬研究。工作面底板破壞最大破壞深度32m。(3)通過工程試驗(yàn)測(cè)得開采對(duì)監(jiān)測(cè)點(diǎn)開始產(chǎn)生影響的距離為66m左右,監(jiān)測(cè)點(diǎn)越淺影響距離越遠(yuǎn);最大破壞位置位于工作面前方5m處,采動(dòng)影響范圍為工作面前后20~55m范圍內(nèi),工作面監(jiān)測(cè)點(diǎn)實(shí)測(cè)最大底板破壞深度為34m。
[Abstract]:Jiulong mine up to now, there are four faces in the coal seam. Each face has different water inrush, large or small. This paper takes the 15445N coal face of Yuqing No. 4 coal seam of Fengfeng Group Jiulong Coal Mine as the research object. The average buried depth of this working face is 850m, which belongs to the large mining face. Combined with hydrogeological data of Jiulong mine and mining experience of Qianyeqing coal face, the research method from theoretical analysis to numerical simulation is adopted. This paper makes a theoretical analysis of the possible causes of floor failure in 15445N working face, and makes simulation prediction and field measurement on the depth and characteristics of the floor damage of the working face, and obtains the following results: 1) there are many reasons for the failure of the floor. These factors include the pressure of the aquifer under the bottom plate, the lithologic collocation of the floor rock mass, the geological structural factors such as joints and fissures, as well as the mining process of the working face and the factors of engineering mining, which are soft together. Both are the factors to be considered in the study of floor failure. Numerical simulation technique is used to simulate the stress state of the floor at different depths and the range and characteristics of plastic deformation of the floor during the mining process of the working face. The maximum damage depth of the working face floor is 32m.f3) the distance from which the mining affects the monitoring point is about 66m, the more shallow the monitoring point is, the farther the influence distance is, and the maximum damage location is located at 5m in front of the working face. The influence range of mining movement is 2055 m before and after the working face, and the maximum floor failure depth measured at the monitoring point of the working face is 34 m.
【學(xué)位授予單位】：河北工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TD745

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