本文選題：近淺埋煤層　切入點(diǎn)：綜放　出處：《山東科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：阿吾孜蘇煤礦4#煤層為厚—特厚煤層,平均厚度8.22m,埋深約220m,煤層上方頂板巖性較軟,但基巖層厚度較大,為近淺埋煤層。4#煤層工作面采用綜放開采,運(yùn)輸平巷采用巷旁充填沿空留巷。為了保障沿空留巷圍巖的穩(wěn)定,需對沿空留巷頂板破斷形態(tài)及巷旁充填體受力進(jìn)行研究。因此,本文采用理論分析、相似材料模擬、數(shù)值計(jì)算和現(xiàn)場監(jiān)測相結(jié)合的方法,對阿吾孜蘇煤礦4#煤層綜放工作面沿空留巷頂板破斷結(jié)構(gòu)及巷旁支護(hù)機(jī)理進(jìn)行研究,獲得的主要結(jié)論如下:(1)根據(jù)阿吾孜蘇煤礦地質(zhì)勘探資料及4#煤層頂板巖層物理力學(xué)參數(shù),進(jìn)行了近淺埋煤層綜放面沿空留巷相似材料模擬,獲得了 4#煤層開采時(shí)工作面?zhèn)认蝽敯迤茢嘌莼^程及頂板(煤)的斷裂位置與垮落角等。(2)通過UDEC數(shù)值模擬軟件對近淺埋煤層綜放面沿空留巷頂板運(yùn)動規(guī)律及巷旁充填體應(yīng)力變化進(jìn)行了模擬。結(jié)果表面:沿空留巷頂板運(yùn)動初期,巷旁充填體內(nèi)壓力增長較快,隨著直接頂?shù)目迓浼安煽諈^(qū)矸石對側(cè)向直接頂?shù)募s束,巷旁充填體內(nèi)壓力增長速率逐漸放緩,在基本頂觸矸并逐漸壓實(shí)采空區(qū)矸石過程中,巷旁充填體內(nèi)壓力增加很少并逐漸趨于穩(wěn)定。(3)在相似材料模擬和數(shù)值計(jì)算研究基礎(chǔ)上,構(gòu)建了近淺埋煤層綜放面沿空留巷頂板破斷結(jié)構(gòu)演化模型,推導(dǎo)了綜放面沿空留巷巷旁支護(hù)阻力的計(jì)算公式。(4)根據(jù)阿吾孜蘇煤礦4-1101工作面生產(chǎn)地質(zhì)條件及開采參數(shù),計(jì)算了工作面回采過程中巷旁充填體所需提供的早期和長期支護(hù)阻力,并結(jié)合充填材料的可泵性確定了充填材料的最優(yōu)配比,將充填材料應(yīng)用于4-1101工作面運(yùn)輸平巷,并對巷道圍巖變形量進(jìn)行監(jiān)測。結(jié)果表明:沿空留巷頂?shù)装逡平孔畲鬄?18mm,兩幫移近量最大為131mm,圍巖變形控制效果較好。
[Abstract]:The coal seam in Awusu coal mine is thick to very thick, with an average thickness of 8.22 m and a buried depth of about 220 m. The roof lithology of the coal seam is relatively soft, but the bedrock layer is relatively thick, so the coal face of near shallow coal seam. The coal seam is fully mechanized caving mining. In order to ensure the stability of the surrounding rock along the gob, it is necessary to study the broken form of roof and the force of the backfill beside the roadway. Therefore, the theoretical analysis and the simulation of similar materials are used in this paper. Combined with numerical calculation and field monitoring, the roof breaking structure and the mechanism of roadside support of top-coal caving face along goaf in Awuzisu coal mine are studied. The main conclusions obtained are as follows: (1) based on the geological exploration data of Awuzisu coal mine and the physical and mechanical parameters of the roof strata of the coal seam, the similar materials along the goaf of the fully mechanized caving face of the near shallow coal seam are simulated. The evolution process of lateral roof breaking in coal face, the fracture position and collapse angle of roof (coal), etc. (2) the movement law and roadway along the goaf of fully mechanized caving face in near shallow coal seam are obtained by UDEC numerical simulation software. The change of side filling stress was simulated. Results: the surface: at the beginning of the roof movement along the gob, The pressure of roadway side filling is increasing rapidly. With the collapse of the direct roof and the restriction of gangue on the side of the goaf, the pressure growth rate of the roadway side filling gradually slows down, and in the process of basically touching the gangue on the top and compacting the gangue in the goaf gradually, On the basis of similar material simulation and numerical calculation, an evolution model of roof breaking structure along goaf of fully mechanized caving face in shallow coal seam is established. Based on the production conditions and mining parameters of 4-1101 face in Awusu Coal Mine, the early and long-term support resistance required by roadway side filling in the process of mining is calculated. Combined with the pumpability of filling material, the optimum proportion of filling material is determined, and the filling material is applied to transport roadway of 4-1101 face. The results show that the maximum displacement of roof and floor along goaf is 118mm, the maximum of two-side is 131mm, and the control effect of surrounding rock deformation is better.
【學(xué)位授予單位】：山東科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD353

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