【摘要】：作為“三下”采煤的主要措施，條帶開采已經(jīng)被我國(guó)各大煤炭集團(tuán)公司廣泛應(yīng)用，其突出的特點(diǎn)是能夠有效減少地表沉陷，保護(hù)地表建（構(gòu)）筑物。缺點(diǎn)是造成滯壓在建（構(gòu)）筑物下的煤炭資源的浪費(fèi)，影響了煤炭企業(yè)的可持續(xù)發(fā)展，但是，條帶開采可以在維持地表處建筑物穩(wěn)定性符合居住的前提下，再次利用積壓浪費(fèi)的費(fèi)碳資源，延長(zhǎng)礦井的壽命，同時(shí)也緩和了工農(nóng)關(guān)系，降低了企業(yè)開采生產(chǎn)的成本，，這方面特別對(duì)一些開采時(shí)間很長(zhǎng)的老礦井顯得尤為重要，因此，對(duì)條帶開采參數(shù)的優(yōu)化，在國(guó)內(nèi)已成為一個(gè)迫切的課題。 本文在研究了萬年煤礦的礦井生產(chǎn)條件、地質(zhì)條件、綜合分考慮地表建（構(gòu)）筑物的因素上，通過分析煤層上覆巖層的巖性以及賦存條件，結(jié)合概率積分法的理論，分別應(yīng)用了下沉系數(shù)和采深的關(guān)系，以及壓力拱的方法確定條帶開采的寬度，在條帶留寬問題上采用單向應(yīng)力法和安全系數(shù)法來確定條帶開采的留寬，對(duì)兩種方案分別就條帶煤柱的穩(wěn)定性和地表沉降處進(jìn)行計(jì)算，得到最優(yōu)的方案，最后應(yīng)用FLAC3D數(shù)值模擬計(jì)算進(jìn)行驗(yàn)證，分析地表各處具體的沉降參數(shù)，對(duì)得出的優(yōu)化參數(shù)進(jìn)行檢驗(yàn)和核準(zhǔn)，綜合分析計(jì)算之后得出最優(yōu)方案。最后結(jié)果表明：優(yōu)化后的條帶煤柱具有足夠的支撐強(qiáng)度和穩(wěn)定性，采出后煤層的上覆巖層不會(huì)引起波浪式下沉，且地表引起的移動(dòng)變形符合地面建筑物《規(guī)定》中規(guī)定的級(jí)采動(dòng)損害的臨街變形值，為企業(yè)提高經(jīng)濟(jì)效益，延長(zhǎng)礦井服務(wù)年限提供有效的理論依據(jù)和技術(shù)經(jīng)驗(yàn)。
[Abstract]:As the main measure of "Sanxia" coal mining, strip mining has been widely used by major coal groups in our country, the outstanding characteristic of which is that it can effectively reduce the surface subsidence and protect the surface building (construction). The drawback is that the waste of coal resources under the hysteretic pressure under the building (construction) has affected the sustainable development of the coal enterprises. However, the strip mining can maintain the stability of the buildings on the surface in accordance with the living conditions. Once again, using the overstocked waste of waste carbon resources to prolong the life of mines, at the same time easing the relationship between workers and farmers, and reducing the cost of mining and production in enterprises, this is especially important for some old mines that have a very long time to mine, so, The optimization of strip mining parameters has become an urgent issue in China. In this paper, on the basis of studying the coal mine production conditions and geological conditions of Wannian coal mine and synthetically considering the factors of surface construction (construction), the lithology and occurrence conditions of overlying strata on coal seam are analyzed, and the theory of probability integration method is combined. The relationship between subsidence coefficient and mining depth and the method of pressure arch are applied to determine the width of strip mining, and the one-way stress method and safety factor method are used to determine the width of strip mining. The stability and surface subsidence of striped coal pillar are calculated, and the optimal scheme is obtained. Finally, the numerical simulation of FLAC3D is used to verify, and the specific settlement parameters are analyzed. The optimized parameters are checked and approved, and the optimal scheme is obtained after comprehensive analysis and calculation. The results show that the optimized strip pillar has sufficient support strength and stability, and the overlying strata of the coal seam after mining will not cause wave subsidence. And the displacement deformation caused by the ground surface accords with the street deformation value of the grade mining damage stipulated in the ground building, which provides an effective theoretical basis and technical experience for the enterprises to improve the economic efficiency and prolong the service life of the mine.
【學(xué)位授予單位】：內(nèi)蒙古科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD823.6

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本文編號(hào)：2236017