Mechanical Analysis of Weakly Cemented Roof of Gob-side Entry Retaining in Fully-Mechanized Top Coal Caving Mining

被引：10

作者：

Gu, Qingheng ^{[1
,2
,3
]}

Ru, Wenkai ^{[3
]}

Tan, Yunliang ^{[1
,2
,3
]}

Ning, Jianguo ^{[1
,2
,3
]}

Xu, Qiang ^{[3
]}

机构：

[1] Shandong Univ Sci & Technol, State Key Lab Min Disaster Prevent & Control Co F, Qingdao 266590, Shandong, Peoples R China

[2] Shandong Univ Sci & Technol, Minist Sci & Technol, Qingdao 266590, Shandong, Peoples R China

[3] Shandong Univ Sci & Technol, Sch Min & Safety Engn, Qingdao 266590, Shandong, Peoples R China

来源：

GEOTECHNICAL AND GEOLOGICAL ENGINEERING | 2019年 / 37卷 / 04期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Weakly cemented; Fully-mechanized top coal caving mining; Gob-side entry retaining; Immediate roof; Equivalent block structure; DEFORMATION;

D O I：

10.1007/s10706-019-00816-1

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

To investigate the mine pressure behavior of weakly cemented roof of gob-side entry retaining (GER) in fully-mechanized top coal caving mining, the structural characteristics of lateral immediate roof in 4-1101 working face of Awuzisu Coal Mine were studied by using of numerical simulation, theoretical analysis and in-site measurement. Mechanical model of equivalent block composite structure of immediate roof was established, and verified by field test. The results indicate that weakly cemented roof has a large caving range, and it is easy to form the equivalent block composite structure in mechanized top caving mining. This structure affects roof breaking, and provide vertical constraint to the roof of GER. It explains the phenomenon that, the roof pressure of GER increases with the advancing of the working face, but the growth rate decreases gradually before the main roof breaking. This research can provide reference to roadside support design and surrounding rock control of GER with weakly cemented roof.

引用

页码：2977 / 2984

页数：8

共 20 条

[1]

Barton N., 1977, Rock Mechanics, V10, P1, DOI 10.1007/BF01261801

[2] New Method of Calculation About Shallow Buried Seam Loosing Pressure [J].

Ding L. ;

Liu Y. .

Geotechnical and Geological Engineering, 2018, 36 (04) :2701-2706

[3]

Du F, 2013, J CHINA COAL SOC, V38, P376

[4]

GAO Yufang, 2018, THESIS

[5] Characteristics of deformation and stress distribution of small coal pillars under leading abutment pressure [J].

Hai, Wu ;

Nong, Zhang ;

Wang Weijun ;

Zhao Yiming ;

Peng, Cao .

INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY, 2015, 25 (06) :921-926

[6]

Jin X. L., 2014, J CHINA COAL SOC, V39, P191, DOI [10.13225/j.cnki.jccs.2013.0889, DOI 10.13225/J.CNKI.JCCS.2013.0889]

[7] Structure and deformation measurements of shallow overburden during top coal caving longwall mining [J].

Li Sheng ;

Fan Chaojun ;

Luo Mingkun ;

Yang Zhenhua ;

Lan Tianwei ;

Zhang Haifeng .

INTERNATIONAL JOURNAL OF MINING SCIENCE AND TECHNOLOGY, 2017, 27 (06) :1081-1085

[8]

Liu Q.L., 2016, COAL SCI TECHNOL, V44, P122

[9]

Ning J. G., 2014, J MINING SAFETY ENG, V31, P569

[10]

[宋振骐 Song Zhenqi], 2010, [煤炭学报, Journal of China Coal Society], V35, P705

← 1 2 →