辽宁工程技术大学学报(自然科学版)
第
32
卷第
4
期
Vo
1.
32 No
.4
Joumal
of
Liaoning Technical University (Natural Science)
文章编号
1008-0562(2013
)04-04
71-04
2013
年
4
月
Apr. 2013
缓倾斜多煤层顶板岩体变形移动特征数值模拟
吴志平仇圣华胡欣雨李瑛
2
cl
上海应用技术学院城市建设与安全工程学院,
J--.
淘
201418;
2
中国建筑北京建筑设计研究院(上海)第五研究所,上海
200065)
摘
要:针对某缓倾斜多煤层复杂的采矿地质条件,运用有限元软件进行三维数值计算分析,建立三维地质概化
模型时考虑了断层的影响,对不同开采条件所引起的煤层顶板岩体移动和地表沉陷进行了数值计算.得到不同开
来条件下地表、煤层顶板基准点的下沉移动分布
l
曲线,煤层顶板基准点的最大、最小沉降、沉降差,以及煤层开
来后顶板的主应力、剪应力值.研究结果表明:同时回来
3101
、
3102
工作面和错时开来
3101
或
3102
工作面引起的
地面最大沉降和沉降差均变化不大,分别为
520mm
、
498mm
、
515
mm
及
59mm
、
78mm
、
81
mm
该矿开来区域
缓倾斜煤层引起的地表变形状况提供定量依据,为缓倾斜煤层以及类似条件下中小矿山合理、安全、经济的开发
提供参考
关键词:缓倾斜:煤层开来:地表位移:顶板位移:主应力:剪应力;断层:数值模拟
中图分类号
TD325
文献标志码
A
Numerical simulation
of
rock displacement and
deforτnation
characteristics
of
a gentle inclined multi-seam
roof
strata
WU
Zhiping\
QIU
Shenghua
t,
HU
Xinyu
t,
LI
Ying
2
(1. School
ofConstruction
and
Safety
Engineering
,
Shanghai
Institute
ofTechnology
,
Shanghai
201418,
China;
2.
Fifth
Institute
(Shanghai)
,
China
Construction
Beijing
Architecture
Design
and
Research
Institute
,
Shanghai
200065,
China)
Abstract:
In tenns
of
the complex mining geological conditions
of
a gen
t1
e inclined multi-seam, this study uses a
three-dimensional finite
e1
ement numerical analysis
so
仕
ware
to establish a three-dimensional geological model
under the different mining conditions. Considering the fault effect
, the study calculates the multi-seam
roof
strata
movement and surface subsidence caused by different mining conditions. The subsidence distribution curve
of
the
reference points at surface and multi -seam
roof
strata under the different working conditions is obtained. The
maximum
, minimum settlement, differential settlement and the principal stress, shear stress value
of
surf
注
ce
and
multi-seam
roof
strata after mining is also obtained. The results show that a little change
of
maximum surface
subsidence and differential settlement is caused by extracting 3101
& 3102 faces simultaneously or mining 310 1
or 3102 faces in a delayed time. The maximum surface subsidence
, the
surf
注
ce
settlement differences are 520mm,
498mm
, 515mm and 59mm, 78mm, 81mm respectiv
e1
y.
The results provide a quantitative basis for studying the
gen
t1
y inclined coal seam surface defonnation caused by mining.
It
provides a useful reference for reasonable,
safe, economic extraction
of
inclined multi-seam mining under similar conditions.
Key
words:
gen
t1
e inclined; coal mining; surface displacement;
roof
strata displacement; principal stress; shear
stress; faults; numerical simulation
o
31
言
随着煤炭资源的进一步开发,浅部及条件简单
地区的煤炭资源逐渐匾乏,条件复杂地区的煤层开
采己构成了中国目前乃至未来相当长时间内煤矿企
业的攻关课题[叫.开采活动破坏了采场围岩的原始
收稿日期
2012-09-21
应力平衡状态,导致其围岩应力重新分布,以往的
研究常常没有考虑断层的影响,由此可能造成结果
误差较大
[3]
该矿的矿井范围主要发育有
F
26
、
F23
、
F
I
-4 、
F
1
小
FI-6
和
Fx-2
断层,且均为张性断层,对煤
层开采极为不利.通过数值模拟研究不同开采条件时
基金项曰:国家自然科学基金资助项目
(51108268);
上海市教育委员会重点学科建设项目资助项目
(j51502)
作者简介:吴志平(
1968-)
,男,江西金溪人,博士,副教授,主要从事地下结构方面研究本文编校:朱艳华