Study of plastic zone width and sealing length based on different elastic constitutive equations

WANG Gang; XU Hao; WU Meng-meng; WANG Rui; SONG Xiang; ZHOU Xiao-hua

doi:10.16285/j.rsm.2017.1879

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Study of plastic zone width and sealing length based on different elastic constitutive equations

更新时间：2026-06-25

- Study of plastic zone width and sealing length based on different elastic constitutive equations
- Vol. 39, Issue 7, Pages: 2599-2608(2018)
- 作者机构：
  
  1. 山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东,青岛,266590
  2. 山东科技大学矿业与安全工程学院,山东,青岛,266590
  3. 香港城市大学土木与建筑工程系,香港,999077
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2017.1879
  CLC： TD82
- Online First：05 August 2018，
  
  Published：2018
- 稿件说明：
移动端阅览
WANG Gang, XU Hao, WU Meng-meng, et al. Study of plastic zone width and sealing length based on different elastic constitutive equations[J]. 2018, 39(7): 2599-2608.
DOI：

WANG Gang, XU Hao, WU Meng-meng, et al. Study of plastic zone width and sealing length based on different elastic constitutive equations[J]. 2018, 39(7): 2599-2608. DOI： 10.16285/j.rsm.2017.1879.

摘要

煤层注水是煤矿开采过程中重要的增透卸压手段，而封孔长度是影响注水压裂效果的一个关键因素。为了确定出合理的封孔长度，根据Lippmann煤层失稳基本理论，选取了6种不同的弹性区本构方程，引入非线性动态瓦斯压力分布的表达式，构建了含瓦斯煤层力学理论模型，得到煤层垂直、水平应力和塑性区宽度的解析式，之后结合高家堡的现场情况，对比分析6种弹性本构方程下的煤层应力分布曲线及塑性区宽度，并进行了现场封孔试验。结果表明：封孔长度在9.5 m时孔洞漏水量小、未出现异常现象，封孔效果良好，最终确定出了合理的封孔长度为9.5 m；相对于其他3种弹性本构方程，选取第i、v、vi种弹性本构方程对封孔长度进行理论计算分析，更加符合现场实际情况。

Abstract

The water injection into coal seam is an effective means of increasing and discharging pressure during coal mining. The sealing length is a key factor affecting the effect of water injection fracturing. To determine the reasonable sealing length

six different elastic constitutive equations were selected according to the basic theory of Lippmann coal seam instability. The expression of nonlinear dynamic gas pressure distribution was introduced

and the mechanical theory model of gas-containing coal seam was constructed. Accordingly

this study obtained the formulas for the vertical

horizontal stress and plastic zone width of coal seam. Combined with the Gaojiapu coal mine

this study compared and analysed the stress distribution curves and the plastic zone widths of the coal seam calculated by three elastic constitutive equations. Moreover

the field sealing experiment was carried out. The results show that the hole leakage is small and not abnormal when the sealing hole length is 9.5 m

which indicates the sealing effect is good and a reasonable sealing length is 9.5 m. Compared with the other three elastic constitutive equations

the calculated results by i

v and vi elastic constitutive equations well confirm with the actual length of the sealing.

关键词

Keywords

references

Views

253

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Mechanical model and test study of sealed drilling for hydraulic fracturing in underground coal mines

Model experimental study of deformation and failure mechanism of low-angled slopes with interbedding of soft and hard rocks

Mechanism of the effect of long-term water injection on mechanical properties of tight sandstone

Simulation of waste temperature changed by single well water injection in a landfill

Evaluation of liquefaction flow characteristics and soil state of saturated sand based on tension and compression apparent viscosity

Related Author

CHEN JIU-fu

XIA Bin-wei

LU Yi-yu

MEI Xu-dong

GE Zhao-long

SONG Ya-fen

ZHOU Yi-chao

XIA Tian-you

Related Institution

State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University

Songzao Coal-Electricity Co., Ltd., Chongqing Energy Investment Group

State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences

CNSIC Survey and Design Institute Co. Ltd.

College of Petroleum Engineering, China University of Petroleum

AI问答

⁰