高瓦斯多煤層大采高工作面覆巖裂隙演化規(guī)律研究
本文選題:大采高工作面 + 覆巖; 參考:《中國(guó)礦業(yè)》2017年03期
【摘要】:高瓦斯多煤層礦井運(yùn)用大采高技術(shù)以實(shí)現(xiàn)礦井高產(chǎn)高效,開(kāi)采工藝不同導(dǎo)致工作面瓦斯涌出規(guī)律的變化。以沁水煤田15#煤層大采高工作面煤層賦存條件和覆巖分布特征為背景開(kāi)展采動(dòng)覆巖裂隙演化規(guī)律研究,運(yùn)用UDEC數(shù)值模擬大采高工作面在不同推進(jìn)距離時(shí)覆巖裂隙形態(tài)發(fā)育及位移量,并提出基于示蹤原理的實(shí)測(cè)覆巖裂隙發(fā)育規(guī)律的驗(yàn)證方法。研究表明:大采高工作面推進(jìn)至120m時(shí),煤層上覆巖層裂隙極限發(fā)育高度為65m,大采高工作面上鄰近層8#煤層處于采動(dòng)卸壓范圍,示蹤氣體法現(xiàn)場(chǎng)測(cè)試數(shù)據(jù)驗(yàn)證了數(shù)值模擬的準(zhǔn)確性。由于大采高工作面覆巖裂隙發(fā)育范圍擴(kuò)展至上鄰近層8#煤層,所以工作面回采過(guò)程中應(yīng)增加上鄰近層瓦斯抽采工藝。
[Abstract]:Large mining height technique is used to realize high yield and high efficiency in high gas multi coal seam mine. Different mining techniques result in the change of gas emission law in working face. Based on the coal seam occurrence conditions and overburden distribution characteristics of the large mining face of No. 15 coal seam in Qinshui coalfield, the evolution law of mining overburden cracks is studied. In this paper, UDEC is used to simulate the formation and displacement of overburden cracks at different propulsive distances, and a method to verify the law of overburden fracture development based on tracer principle is put forward. The study shows that the limit height of fracture development of overlying strata is 65 m when the working face of large mining height is advanced to 120 m, and the coal seam near seam 8# on the face of large mining height is in the range of mining and unloading pressure. The accuracy of numerical simulation is verified by field test data of tracer gas method. Since the development range of overburden cracks in large mining face extends to the upper adjacent seam 8# coal seam, the gas drainage technology of upper adjacent strata should be increased in the mining process of working face.
【作者單位】: 東北大學(xué)資源與土木工程學(xué)院;
【基金】:國(guó)家科技重大專(zhuān)項(xiàng)資助(編號(hào):2016ZX05067) 遼寧省自然科學(xué)基金項(xiàng)目資助(編號(hào):2013020137)
【分類(lèi)號(hào)】:TD712
【參考文獻(xiàn)】
相關(guān)期刊論文 前9條
1 匡鐵軍;;特厚煤層大采高綜放工作面端部覆巖活動(dòng)規(guī)律研究[J];煤炭科學(xué)技術(shù);2016年06期
2 張蓓;;大采高厚煤層采場(chǎng)覆巖結(jié)構(gòu)與運(yùn)動(dòng)分析[J];中國(guó)礦業(yè);2016年06期
3 李曉璐;歐陽(yáng)振華;李少剛;;基于相似模擬的淺埋深煤層覆巖采動(dòng)裂隙分析[J];中國(guó)礦業(yè);2016年04期
4 Li Huamin;Syd Peng;Li Huigui;Xu Yongxiang;Yuan Ruifu;Yue Shuaishuai;Li Kun;;Trial of small gateroad pillar in top coal caving longwall mining of large mining height[J];International Journal of Mining Science and Technology;2016年01期
5 苗磊剛;石必明;穆朝民;秦如祥;;大采高采動(dòng)覆巖變形的相似模擬試驗(yàn)研究[J];中國(guó)安全科學(xué)學(xué)報(bào);2016年01期
6 解盤(pán)石;伍永平;王紅偉;任世廣;;大傾角煤層大采高綜采圍巖運(yùn)移與支架相互作用規(guī)律[J];采礦與安全工程學(xué)報(bào);2015年01期
7 張軍;王建鵬;;采動(dòng)覆巖“三帶”高度相似模擬及實(shí)證研究[J];采礦與安全工程學(xué)報(bào);2014年02期
8 楊建立;左建平;孫凱;孟冰冰;林軒;;大采高多斷層工作面綜放誘發(fā)地表沉陷觀測(cè)及數(shù)值分析[J];巖石力學(xué)與工程學(xué)報(bào);2011年06期
9 郭保華,李培,雷清泉;淺談我國(guó)大采高綜采技術(shù)[J];礦業(yè)安全與環(huán)保;2003年06期
【共引文獻(xiàn)】
相關(guān)期刊論文 前10條
1 張偉;許開(kāi)立;;高瓦斯多煤層大采高工作面覆巖裂隙演化規(guī)律研究[J];中國(guó)礦業(yè);2017年03期
2 郭壽松;;霍爾辛赫3207大采高工作面上覆巖層運(yùn)移數(shù)值模擬分析[J];礦業(yè)安全與環(huán)保;2017年01期
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