本文選題：充填開(kāi)采　切入點(diǎn)：充填支架　出處：《太原理工大學(xué)》2017年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：充填開(kāi)采是解決“三下壓煤”的根本途徑,現(xiàn)階段充填開(kāi)采技術(shù)依然無(wú)法滿(mǎn)足高效環(huán)保的綠色理念。究其重要原因在于充填開(kāi)采的工藝設(shè)備無(wú)法達(dá)到工作面所需要的開(kāi)采及充填要求。本文通過(guò)理論分析和模擬研究的手段,以汾西集團(tuán)新陽(yáng)煤礦10203工作面地質(zhì)條件為背景,針對(duì)該礦的支架?chē)鷰r力學(xué)關(guān)系、支架三維模型及壓架模擬實(shí)驗(yàn)設(shè)計(jì)、ANSYS支架結(jié)構(gòu)有限元分析、支架液壓系統(tǒng)模型構(gòu)建與仿真四個(gè)方面展開(kāi)研究。首先,以礦壓基本理論為中心,分析了支架、圍巖所受載荷的情況,建立了充填系統(tǒng)的等效彈簧支護(hù)模型。重點(diǎn)以充填支架與圍巖相互的作用關(guān)系基礎(chǔ)上分析論證,參考前人研究的充填體強(qiáng)度形成規(guī)律,進(jìn)一步建立了充填支架初撐力計(jì)算公式,并得出初撐力的大小隨著充填體壓縮率的增大而增大。隨著工作面推進(jìn)距離的增加,充填支架初撐力大致以對(duì)數(shù)形式增加,并逐漸趨于穩(wěn)定。其次,基于充填支架與圍巖關(guān)系的理論分析、在新陽(yáng)礦原有的支架結(jié)構(gòu)參數(shù)和液壓支架的基本設(shè)計(jì)原則的基礎(chǔ)上,對(duì)膏體充填工作面的充填液壓支架進(jìn)行了輔助機(jī)構(gòu)分析優(yōu)化和主體承載結(jié)構(gòu)的三維建模�；诔涮铋_(kāi)采特殊工況,通過(guò)ANSYS有限元分析對(duì)支架底座扭轉(zhuǎn)、集中加載、頂梁偏載、中部及兩端集中加載方式進(jìn)行壓架實(shí)驗(yàn)。得出充填支架在充填初期的頂梁偏載、底座扭轉(zhuǎn)加載的工況下受到的應(yīng)力最大,其最大應(yīng)力為139.91MPa,支架的后立柱部分受到的應(yīng)力普遍較大,為充填支架的優(yōu)化提供了一定的數(shù)據(jù)支持。最后,針對(duì)該礦的實(shí)際情況,建立了充填液壓支架的液壓系統(tǒng)仿真模型,對(duì)支架立柱系統(tǒng)、控制系統(tǒng)的各部件工作狀態(tài)進(jìn)行模擬仿真,得到充填開(kāi)采初期的立柱升柱特性:在立柱初撐階段,隨著時(shí)間不斷增加立柱升高,當(dāng)達(dá)到12.3s時(shí)完成升柱并上升至2.1m。同時(shí)分析了在膏體充填初期,支架液壓系統(tǒng)安全閥的啟閉特性、閥芯的受力、位移、速度特性。得出了隨著頂板對(duì)支架的來(lái)壓,先導(dǎo)閥芯產(chǎn)生周期性受力的結(jié)論。通過(guò)本文的研究,豐富了膏體充填開(kāi)采、膏體充填支架結(jié)構(gòu)、膏體充填支架液壓系統(tǒng)等研究領(lǐng)域的內(nèi)容,同時(shí)也為支架整體的優(yōu)化設(shè)計(jì)提供了多角度的參考和借鑒。
[Abstract]:Filling mining is the fundamental way to solve the problem of "three lower pressure coal". At present, the filling mining technology still can not meet the green idea of high efficiency and environmental protection. The important reason is that the technological equipment of filling mining can not meet the requirements of mining and filling required by the working face. The means of simulation research, Based on the geological conditions of No. 10203 face of Xinyang Coal Mine of Fenxi Group, this paper aims at the mechanical relationship of support surrounding rock, the three-dimensional model of support and the experimental design of pressure frame simulation. The finite element analysis of support structure with ANSYS is carried out. The modeling and simulation of hydraulic system of support are studied in four aspects. Firstly, taking the basic theory of rock pressure as the center, the load of support and surrounding rock is analyzed. The equivalent spring support model of filling system is established. Based on the interaction between backfill support and surrounding rock, the formula for calculating the initial bracing force of backfill support is further established by referring to the law of strength formation of backfill body studied by predecessors, and based on the analysis and argumentation of the interaction between backfill support and surrounding rock. It is concluded that the initial support force increases with the increase of filling compression ratio. With the increase of working face advance distance, the initial support force increases in logarithmic form and tends to be stable gradually. Based on the theoretical analysis of the relationship between backfill support and surrounding rock, and on the basis of the original structural parameters of support and the basic design principles of hydraulic support in Xinyang Mine, In this paper, the auxiliary mechanism analysis and optimization of the filling hydraulic support in paste filling face and the 3D modeling of the main bearing structure are carried out. Based on the special working conditions of filling mining, the support base torsion, concentrated loading and beam offset load are analyzed by ANSYS finite element analysis. The central and two ends of the concentrated loading mode of the compression frame experiment. It is concluded that the filling support in the initial filling of the top beam bias load, the base torsional loading under the conditions of the maximum stress, The maximum stress is 139.91MPa, and the stress on the back column of the support is generally larger, which provides certain data support for the optimization of the backfill support. Finally, according to the actual situation of the mine, the hydraulic system simulation model of the backfill hydraulic support is established. The working state of the components of the support column system and the control system are simulated and simulated, and the characteristics of the column lifting at the initial stage of filling mining are obtained: in the initial bracing stage of the pillar, the column increases with time, At 12.3 s, the lifting column is finished and rises to 2.1 m.At the same time, the opening and closing characteristics of the safety valve of the hydraulic system of the support, the stress, displacement and velocity characteristics of the valve core during the initial stage of paste filling are analyzed. Through the research of this paper, it enriches the research fields of paste filling mining, paste filling support structure, paste filling support hydraulic system, etc. At the same time, it also provides a multi-angle reference for the optimum design of the support.
【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】：2017
【分類(lèi)號(hào)】：TD355;TD823.7

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