第
29
卷第
2
期
2014
年
6
月
矿业工程研究
Mineral
Engineering Research
doi: lO. 13582/j. cnki. 1674
-5876.2014.02.001
岩层倾角对巷道结构稳定性的影晌
凌涛
1
气王卫军
l
气张农
1
,
2
,
3
吴海
1
,
2
,
3
彭文庆
1
,
2
(1.湖南科技大学煤矿安全开采技术湖南省重点实验室,湖南湘潭,
411201
;
2.
湖南科技大学能源与安全工程学院,湖南湘潭
411201
;3.
中国矿业大学矿业工程学院,江苏徐州
221116
)
Vo
l.
29
No.2
Jun.
2014
摘
要:为了解决倾斜岩层巷道存在的变形不对称问题,建立了巷道两帮围岩受力力学模型.分析表明,巷道高帮围岩
受到沿岩层倾向向下的"拉力"和岩层法向上的压力作用,围岩容易发生拉破坏;巷道低帮围岩受沿岩层法向和岩层倾向压
力作用,围岩相对稳定.利用
UDEC
软件对不同倾角模型模拟分析发现倾斜岩层巷道结构非均称变形表现为
3
个方面:
(1)巷道高帮变形量大于低帮变形量
;(2)
岩层倾角增加,高低帮水平变形量都增加,高帮水平变形量增加速度大于低帮增
加速度,岩层倾角增加,高低帮垂直变形量先增加再逐渐减小
;(3)
高帮垂直位移量在帮角处最大,随高度增加而减小,低帮
垂直位移量在底角处最小,随高度增加而增加.
关键词:倾斜岩层;变形;不对称;数值模拟;稳定性
中固分类号
:TD322.4
文献标志码
:A
文章编号
:1672
-9102(2014)02-
∞
01
-05
E
fT
ect characteristics
of
rock
strata
with varying
inclinations on stability
of
roadway structure
LING Tao
1
•
2
, WANG Weijun
1
•
2
, ZHANG Nong
1
•
2
.
3
,
WU
Hail.2.3 , PENG Wenqing
1
•
2
( 1. Hunan Provincial
Key
Lab
oratory of Safe Mining Techniques of Coal Mines ,
Hunan University of 5cience and Technology , Xiangtan 411201 , China;
2. School of Mining and 5afety
Engineeri
吨,
Hunan University of Science and Technology , Xiangtan 411201 , China;
3. School of Mining Engineering
, China
Unive
目
ity
of Mining & Technology , Xuzhou 221116, China)
Abstract:
Aiming at the roadway asymmetric
defo
口
nation
within inclined rock strata, the mechanics model
of roadway sidewalls is built.
Th
e analysis shows that the sUITounding rock tensile failure of long side is likely to
occur
under downward tension of inclined rock strata and strata normal direction stress, whereas thesuITounding
rock of short side is relatively stable under strata normal direction
and
inclined rock strata stress. According
ω
出
e
numerical simulation analysis of different dip angles by UDEC (Universal Distinct Element Code) , it is found
that the structure asymmetric deformation of the inclined rock strata roadway has three characteristics as follows:
( 1 ) the high side deformation degree is greater than that of
low
side within roadway;
(2)
the dip angles of rock
strata increases
, it naturally follows the sidewalls horizontal deformation degree and the increase of high side
horizontal deformation degree is faster than that of
low
side, while the sidewalls vertical deformation degree
increases at first and gradually decreases when the dip angles of rock strata increases;
(3)
the high side vertical
displacement presents the greatest degree at the base angle and decreases
wi
也
the
height increases , while the
low
side vertical displacement
presents
也
e
slightest degree at the base angle and increases
wi
由
the
height increase.
Key
words:
inclined rock strata; deformation; asymmetric; numerical simulation; stability
收稿日期
:2013
-03
-11
基金项目
t
国家自然科学基金资助项目
(51374105)
;湖南省高等学校科学研究资助项目
(12C0125
; 13C308)
;湖南省高校产业化培育
资助项目
(12CY013)
;湖南科技大学研究生创新基金资助项目(
513
∞
03)
通信作者:王
E
军(1
965-)
,男,湖南涟源人,博士,教授,研究方向:巷道围岩控制.
E-mail:
wjwang@hnus
t.
cn