山区沟谷地形采动覆岩移动变形数值模拟
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摘要
针对山区沟谷地形条件下的开采沉陷问题,以山西宏盛煤矿为工程背景,采用UDEC数值模拟软件建立了沟谷地形条件下采动过程中覆岩与地表移动变形数值模型,重点分析了采动过程中覆岩与地表的力学损伤状态及位移变化.研究表明:采动程度对覆岩与地表的损伤状态具有重要影响,即采动程度越大,处于塑性破坏区的覆岩范围越大;沟谷地形地面坡度产生的附加水平移动对冲是形成谷底地表隆起的主要原因.
Aiming at the problem of mining subsidence under the condition of gully topography in the mountainous area,a numerical model of overburden and surface movement and deformation in mining process under the condition of gully topography is established by using UDEC numerical simulation software,taking a mine in Shanxi Province as the engineering background. The damage state of mechanics and displacement change of overburden and surface during mining are analyzed. The study shows that the extent of mining has an important effect on the damage state of overburden and surface,that is,the larger the mining degree is,the larger the overburden in the plastic failure zone is. The main reason for the surface uplift of valley bottom is the additional horizontal movement hedge caused by the slope of valley topography.
Aiming at the problem of mining subsidence under the condition of gully topography in the mountainous area,a numerical model of overburden and surface movement and deformation in mining process under the condition of gully topography is established by using UDEC numerical simulation software,taking a mine in Shanxi Province as the engineering background. The damage state of mechanics and displacement change of overburden and surface during mining are analyzed. The study shows that the extent of mining has an important effect on the damage state of overburden and surface,that is,the larger the mining degree is,the larger the overburden in the plastic failure zone is. The main reason for the surface uplift of valley bottom is the additional horizontal movement hedge caused by the slope of valley topography.
引文
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[12]刘腾,王金安,高治国,等.山区地下开采地表移动相似模拟实验研究[J].金属矿山,2014(10):161-165.
[13]白光宇,张德强,张进德,等.山区开采沉陷地表移动变形规律[J].辽宁工程技术大学学报(自然科学版),2017,17(7):684-688.
[2]马荷雯,刘长星.深埋煤层采动山区地表移动规律实测研究[J].煤炭技术,2015(12):104-106.
[3]赵振远,韦开行,潘喆.岩溶山区采煤地表移动规律研究[J].地下水,2014(4):216-219.
[4]张海港.山区首采面大采深大采高地表移动变形规律研究[J].矿山测量,2014(1):65-68.
[5]李威,胡海峰,李俊芳.山区微地貌对开采沉陷规律的影响[J].煤矿安全,2014(10):211-213.
[6]王启春,李天和,郭广礼.基岩裸露山区煤层倾角对地表移动规律的影响研究[J].煤炭科学技术,2016,44(9):155-160.
[7]王启春,李天和,贾鹏举,等.基岩裸露山区采动地表移动规律研究[J].煤炭工程,2016(3):95-98.
[8]徐涵洵,张和生,秦世界.井工开采条件下地表坡度对地表移动变形的影响研究[J].煤炭技术,2014(8):118-120.
[9]廉旭刚,胡海峰,郭博婷.山区开采地表动态移动变形规律[J].金属矿山,2016(9):151-156.
[10]韩奎峰,康建荣,王正帅,等.山区采动地表裂缝预测方法研究[J].采矿与安全工程学报,2014,31(6):896-900.
[11]李小磊,白易彬.采动影响下山区与平原地区地表移动规律比较[J].中州煤炭,2011(7):35-36.
[12]刘腾,王金安,高治国,等.山区地下开采地表移动相似模拟实验研究[J].金属矿山,2014(10):161-165.
[13]白光宇,张德强,张进德,等.山区开采沉陷地表移动变形规律[J].辽宁工程技术大学学报(自然科学版),2017,17(7):684-688.