本文關(guān)鍵詞： 綜放開(kāi)采 窄煤柱 支護(hù)技術(shù) 數(shù)值模擬　出處：《太原理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：針對(duì)煤礦開(kāi)采技術(shù)的不斷發(fā)展，綜合機(jī)械化放頂煤開(kāi)采技術(shù)已被廣泛應(yīng)用于煤礦工程實(shí)踐中。同時(shí)為了提高煤炭資源的利用率，回采巷道一側(cè)為開(kāi)采煤體另一側(cè)多采用窄煤柱布置。窄煤柱的留設(shè)一方面可提高資源的采出率，避免造成資源浪費(fèi)；另一方面卻面臨在工作面周期來(lái)壓不斷作用下，回采巷道變形明顯，支護(hù)變得困難。在眾多條件下，對(duì)于綜放工作面窄煤柱回采巷道支護(hù)研究就顯得十分必要。根據(jù)工作面頂板巖層垮落規(guī)律和礦壓顯現(xiàn)規(guī)律分析，同時(shí)結(jié)合實(shí)際工作面礦壓規(guī)律的實(shí)測(cè)數(shù)據(jù)，理論計(jì)算得出了窄煤柱的尺寸大小，并借助FLAC3D數(shù)值模擬技術(shù)模擬了不同條件下窄煤柱應(yīng)力和位移的變化。在確定窄煤柱尺寸大小的基礎(chǔ)上，通過(guò)分析窄煤柱破碎巖體注漿加固技術(shù)，確定注漿加固參數(shù)，并最終確定了窄煤柱回采巷道錨注支護(hù)方案和參數(shù)。 本文主要針對(duì)三元煤業(yè)綜放工作面窄煤柱回采巷道技術(shù)研究，主要結(jié)論如下： （1）通過(guò)對(duì)工作面上覆巖層的垮落特征分析并結(jié)合工作面實(shí)際礦壓規(guī)律的觀測(cè)得到1308工作面回風(fēng)順槽在回采過(guò)程中的表面位移、深部位移均控制在合理范圍之內(nèi)，錨—網(wǎng)支護(hù)效果較好，可以保證該巷道使用壽命滿足開(kāi)采需求；1308工作面回風(fēng)順槽在工作面超前50米范圍內(nèi)變形加速，錨索、錨桿受力較大，應(yīng)注意加強(qiáng)支護(hù)，控制其變形；1308工作面保護(hù)煤柱支承壓力峰區(qū)在6.5m以外，根據(jù)巷道煤柱寬度確定要求，可以將煤柱寬度設(shè)計(jì)在6m以內(nèi)；沿空掘巷布置工作面回風(fēng)順槽時(shí)，應(yīng)加大巷道斷面，防止頂板下沉量、兩幫移近量過(guò)大影響生產(chǎn)；加長(zhǎng)錨桿、錨索長(zhǎng)度并增加其均勻布置的數(shù)量，保證巷道圍巖成為一個(gè)錨固整體；1310工作面小煤柱寬度應(yīng)控制在6米的范圍以內(nèi)。 （2）通過(guò)FLAC3D軟件進(jìn)行數(shù)值模擬建立模型，分別模擬了掘進(jìn)期間和回采期間煤柱圍巖屈服破壞特征、小煤柱的應(yīng)力和位移分布特征，及隨工作面向前推進(jìn)煤柱寬度對(duì)巷道圍巖位移變化的影響，同時(shí)確定了小煤柱的合理寬度為5.0m。 （3）對(duì)破碎巖體注漿加固機(jī)理進(jìn)行研究得到，注漿加固主要有以下特點(diǎn)：漿液固化網(wǎng)絡(luò)骨架作用；充填壓密提高圍巖強(qiáng)度；減少巷道圍巖破碎區(qū)；注漿固化封閉水源；改善錨桿受力狀況。并結(jié)合工作面實(shí)際地質(zhì)情況確定了注漿加固參數(shù)。 （4）經(jīng)分析計(jì)算最終得出了回采巷道支護(hù)方案和參數(shù)，選用“錨桿+金屬網(wǎng)+鋼筋梁+錨索補(bǔ)強(qiáng)+注漿加固”的聯(lián)合支護(hù)方案；頂錨桿：錨桿長(zhǎng)度2400mm，間排距900m m800mm，錨固長(zhǎng)度1200mm，頂錨索：錨索長(zhǎng)度8000mm，錨固長(zhǎng)度為1800m m，錨索排距2400mm，，幫錨桿：錨桿長(zhǎng)度2000mm，錨固長(zhǎng)度為600mm。
[Abstract]:According to the continuous development of coal mining technology, comprehensive mechanized coal caving mining technology has been widely used in coal mine engineering practice. At the same time in order to improve the utilization rate of coal resources, coal mining roadway side to the other side of the narrow coal pillar layout. The narrow pillar on the one hand can improve the recovery rate of resources, to avoid waste of resources; on the other hand are in the face of periodic pressure continuously under the action of roadway deformation obviously, supporting difficult. In many conditions, for fully mechanized caving face of narrow coal pillar roadway supporting research is very necessary. According to the working face roof caving rule of law and strata pressure, measured data and combining with the actual working face of mine pressure law, we calculate the theoretical size of narrow coal pillar, and by means of FLAC3D numerical simulation technology to simulate the narrow coal pillar under different conditions should be On the basis of determining the size of narrow coal pillar, through analyzing the grouting reinforcement technology of narrow coal pillar broken rock, the parameters of grouting reinforcement are determined, and finally, the bolting and grouting support scheme and parameters of narrow coal pillar mining roadway are determined finally.
This paper mainly focuses on the technical research of narrow coal pillar mining roadway in three yuan coal caving face. The main conclusions are as follows:
(1) through the analysis of the characteristics of overlying rock caving working face reality and combining with the observation of mine pressure law are 1308 working face return along the groove surface displacement in the process of mining, deep displacement are controlled in a reasonable range, anchor net supporting effect is good, can guarantee the use of roadway to meet the demand of mining life; 1308 working face return roadway in front within 50 meters of deformation acceleration, anchor, anchor force, should pay attention to strengthening the support to control its deformation; 1308 working face protection coal pillar abutment pressure peak area outside of 6.5m, according to the roadway width of coal pillar coal can be determined, column width design within 6m; along goaf working face layout of air trough, should increase the roadway, prevent the subsidence of roof, two sides closer to the large amount of production; the length of the anchor bolt is lengthened, and increase the number of uniform arrangement, guarantee The surrounding rock of the tunnel becomes an anchorage whole, and the width of the small coal pillar in the 1310 working face should be within the range of 6 meters.
(2) to establish model of numerical simulation by FLAC3D software was used to simulate the failure characteristics of yield during the driving period and mining coal pillars surrounding rock stress and displacement distribution of small coal pillar, and the work for the advance effect of coal pillar width on the change of displacement of surrounding rock, and to determine the reasonable width of small coal pillar 5.0m.
(3) to study the reinforcement mechanism of rock grouting get broken, grouting has the following characteristics: solidification network skeleton; filling compaction to improve the rock strength; reduce surrounding rock broken zone; grouting and solidifying closed water; improve the bolt stress condition. And combined with the working face of the actual geological conditions determine the grouting parameters.
(4) through analysis concluded that the roadway support scheme and parameter selection, the supporting scheme of joint bolt + + metal mesh reinforced beam + anchor reinforcement grouting + "; top anchor bolt length 2400mm, spacing 900m m800mm, anchorage length 1200mm, top anchor: anchor cable length 8000mm 1800m m, anchor length, anchor spacing for anchor bolt length: 2400mm, 2000mm, anchorage length is 600mm.

【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD353

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 馬鉞,方祖烈,馬強(qiáng);巖石力學(xué)離散介質(zhì)數(shù)值方法及應(yīng)用程序研究綜述[J];東北煤炭技術(shù);1999年03期

2 苗國(guó)航;我國(guó)預(yù)應(yīng)力巖土錨固技術(shù)的現(xiàn)狀與發(fā)展[J];地質(zhì)與勘探;2003年03期

3 魯巖;鄒喜正;崔道品;于新峰;;圍巖破碎圈的理論分析與實(shí)踐[J];遼寧工程技術(shù)大學(xué)學(xué)報(bào);2007年02期

4 李志平;鄒正盛;羅平平;杜家慶;;井巷支護(hù)技術(shù)發(fā)展與現(xiàn)狀[J];礦山機(jī)械;2009年08期

5 王學(xué)軍;錢(qián)學(xué)森;馬立強(qiáng);張煒;;厚煤層大采高全厚開(kāi)采工藝研究與應(yīng)用[J];采礦與安全工程學(xué)報(bào);2009年02期

6 鄭雨天，朱浮聲;預(yù)應(yīng)力錨桿體系──錨桿支護(hù)技術(shù)發(fā)展的新階段[J];礦山壓力與頂板管理;1995年01期

7 靖洪文，董方庭，吳蘭蓀，牟彬善;回采巷道錨桿支護(hù)問(wèn)題探討與實(shí)踐[J];礦山壓力與頂板管理;1995年Z1期

8 鄒喜正,侯朝炯,李華祥;THE CLASSIFICATION OF THE SURROUNDINGS OF COAL MINING ROADWAYS[J];Journal of Coal Science & Engineering(China);1996年02期

9 王衛(wèi)軍,侯朝炯;Study of mechanical principle of floor heave of roadway driving along next goaf in fully mechanized sub-level caving face[J];Journal of Coal Science & Engineering(China);2001年01期

10 侯朝炯;Review of roadway control in soft surrounding rock under dynamic pressure[J];Journal of Coal Science & Engineering(China);2003年01期

本文編號(hào)：1517713