本文選題：箕斗裝載硐室 + 圍巖穩(wěn)定性　； 參考：《安徽理工大學(xué)》2015年碩士論文

【摘要】：隨著人類(lèi)對(duì)礦產(chǎn)需求量的不斷增加,煤炭的開(kāi)采強(qiáng)度和深度在不斷擴(kuò)大,進(jìn)而煤礦箕斗裝載硐室的設(shè)計(jì)規(guī)模也在變大,對(duì)位于深部的斷面大的、結(jié)構(gòu)復(fù)雜的裝載硐室支護(hù)變得更加困難。因此,研究深部礦井大型箕斗裝載硐室的圍巖穩(wěn)定性,提出箕斗裝載硐室支護(hù)優(yōu)化方案,確保煤礦生產(chǎn)安全,有著十分重要的意義。論文對(duì)圍巖的穩(wěn)定性影響因素以及硐室圍巖的的變形與破壞進(jìn)行了分析；研究了影響硐室圍巖穩(wěn)定性因素,硐室圍巖變形破壞的具體表現(xiàn)形式,闡述了硐室的開(kāi)挖方法和支護(hù)技術(shù)。 針對(duì)潘三礦深部礦井裝載硐室埋深大,斷面尺寸大,圍巖條件差等特點(diǎn),對(duì)其支護(hù)結(jié)構(gòu)進(jìn)行了優(yōu)化,減小了錨桿、錨索的間排距,并補(bǔ)打了錨索,與原支護(hù)結(jié)構(gòu)計(jì)算結(jié)果進(jìn)行了對(duì)比分析,結(jié)果表明：采用優(yōu)化方案的支護(hù)結(jié)構(gòu)應(yīng)力和圍巖變形均明顯小于原設(shè)計(jì)方案的結(jié)構(gòu)應(yīng)力和圍巖變形,且能夠滿足硐室圍巖受力及變形要求,使得支護(hù)體受力得到較為明顯的改善,具有一定的安全儲(chǔ)備；其次,為研究箕斗裝載硐室曲墻四心圓和直墻半圓拱這兩種支護(hù)結(jié)構(gòu)的的差異性,采用FLAC3D數(shù)值模擬軟件對(duì)兩種支護(hù)結(jié)構(gòu)作了對(duì)比分析,發(fā)現(xiàn)當(dāng)遇到大斷面的的箕斗裝載硐室,并且地壓較大、圍巖較差的時(shí)候,曲墻四心圓支護(hù)結(jié)構(gòu)更有優(yōu)勢(shì),能發(fā)揮更大的作用。最后對(duì)風(fēng)井箕斗裝載硐室的支護(hù)結(jié)構(gòu)進(jìn)行了實(shí)時(shí)監(jiān)測(cè),監(jiān)測(cè)結(jié)果表明：支護(hù)結(jié)構(gòu)鋼筋應(yīng)力、混凝土應(yīng)變趨于穩(wěn)定,并且小于設(shè)計(jì)值,由此可見(jiàn)優(yōu)化后的支護(hù)結(jié)構(gòu)處于安全狀態(tài),可為類(lèi)似結(jié)構(gòu)的支護(hù)設(shè)計(jì)提供參
[Abstract]:With the increasing human demand for mineral resources, the mining intensity and depth of coal are expanding, and the design scale of the coal skip loading chamber is also becoming larger, and the section located in the deep section is large. The complex structure of loading chamber support becomes more difficult. Therefore, it is of great significance to study the stability of surrounding rock of large skip loading chamber in deep mine, to put forward the optimized support scheme of skip loading chamber and to ensure the safety of coal mine production. This paper analyzes the factors affecting the stability of surrounding rock and the deformation and failure of surrounding rock of chamber, studies the factors affecting the stability of surrounding rock of chamber and the concrete manifestation of deformation and failure of surrounding rock of chamber. The excavation method and supporting technology of chamber are expounded. In view of the characteristics of large depth of loading chamber, large cross section size and poor surrounding rock condition of deep mine loading chamber in Panshan No. 3 Mine, the supporting structure is optimized to reduce the spacing between anchors and cables, and to make up for the anchoring cables. Compared with the calculation results of the original support structure, the results show that the stress of the supporting structure and the deformation of the surrounding rock in the optimized scheme are obviously smaller than the structural stress and the deformation of the surrounding rock in the original design scheme. And can meet the chamber surrounding rock force and deformation requirements, so that the force of the support body has been significantly improved, with a certain amount of safety reserves; secondly, In order to study the difference between the four center and half circular arch support structures of skip loading chamber, the FLAC3D numerical simulation software is used to compare the two support structures, and it is found that when the skip loading chamber with large section is encountered, And when the ground pressure is large and the surrounding rock is poor, the four-center circular support structure of curved wall has more advantages and can play a greater role. The monitoring results show that the reinforcement stress and concrete strain of the supporting structure tend to be stable and smaller than the design value, which shows that the optimized support structure is in a safe state. It can provide reference for the support design of similar structure.
【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(lèi)號(hào)】：TD354

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本文編號(hào)：1928928