Anchorage performance of large-diameter FRP bolts and their application in large deformation roadway

钢筋 纤维增强塑料 煤矿开采 极限抗拉强度 结构工程 螺栓连接 刚度 材料科学 复合材料 变形(气象学) 剪切(地质) 岩土工程 工程类 废物管理
作者
Jun Han,Zuoqing Bi,Bing Liang,Chen Cao,Shuangwen Ma
出处
期刊:International journal of mining science and technology [Elsevier]
卷期号:33 (8): 1037-1043 被引量:5
标识
DOI:10.1016/j.ijmst.2022.09.028
摘要

In underground coal mines, fibre reinforced polymer (FRP) bolt is ideal for mined rib reinforcements as it can prevent gas explosions caused by shearer frictional spark. With increasing mining depth, small diameter FRP bolts used in shallow underground mining cannot fulfil the rib support requirements. Under the engineering background of deep underground shortwall mining in Wudong coal mine, this paper systematically studies Φ27 mm FRP bolt support for large deformation coal rib. Specimens with a fan-shaped cross-section were used to enable the tensile testing of the bolt rod, the measured average tensile strength of the studied FRP bolt was (486.1 ± 9.6) MPa with a maximum elongation of 5.7 % ± 0.6 %. The shear strength of the bolt was measured as approximately 258 MPa using a self-made double shear testing apparatus. Based on the equivalent radial stiffness principle, a laboratory short encapsulation pullout test (SEPT) method for rib bolting has been developed undertaken consideration of the mechanical properties of the coal seam. Results showed that the average peak anchorage forces of the Φ27 mm FRP bolt and Φ20 mm steel rebar bolt were 108.4 and 66.4 kN, respectively, which were agreed with the theoretical calculations and field measurements. Based on theoretical analysis of the loading states of the bolt under site conditions, bolting method of full-length resin grouting was adopted to offset the weaknesses of the FRP bolt. Numerical method was employed to compare the bolting effect using Φ27 mm FRP bolts and steel rebar bolts. Large diameter FRP bolting was determined as the optimum rib support scheme to increase the productivity of the coal mine and to enhance the ground control capability for +425 level mining roadways. This study provides the laboratory testing design and theoretical prediction of large diameter FRP bolts used for rib support in large deformation roadways.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
1秒前
1秒前
Orange应助白若可依采纳,获得10
3秒前
逆蝶完成签到,获得积分10
3秒前
xiuxiuxiuxiu完成签到,获得积分10
4秒前
安详怜蕾发布了新的文献求助10
4秒前
handan发布了新的文献求助10
5秒前
Vedia完成签到,获得积分10
7秒前
NexusExplorer应助jjamazing采纳,获得10
8秒前
8秒前
文艺水风完成签到 ,获得积分10
9秒前
幸福采柳完成签到,获得积分10
9秒前
帅气凝云完成签到 ,获得积分10
9秒前
10秒前
10秒前
汉堡包应助hahhh7采纳,获得10
10秒前
rachel-yue发布了新的文献求助50
11秒前
12秒前
乔心发布了新的文献求助10
14秒前
14秒前
Lucky完成签到,获得积分10
15秒前
大红豆子发布了新的文献求助10
17秒前
18秒前
18秒前
18秒前
JYM完成签到,获得积分10
19秒前
20秒前
柔弱山芙完成签到,获得积分10
21秒前
handan完成签到,获得积分10
21秒前
dake2021完成签到,获得积分10
21秒前
王龑完成签到,获得积分20
22秒前
22秒前
22秒前
23秒前
hahhh7发布了新的文献求助10
23秒前
23秒前
小耿完成签到 ,获得积分10
23秒前
23秒前
Kathy发布了新的文献求助30
24秒前
张钰婷啦啦啦完成签到,获得积分10
25秒前
高分求助中
Mantiden: Faszinierende Lauerjäger Faszinierende Lauerjäger Heßler, Claudia, Rud 1000
PraxisRatgeber: Mantiden: Faszinierende Lauerjäger 1000
Natural History of Mantodea 螳螂的自然史 1000
A Photographic Guide to Mantis of China 常见螳螂野外识别手册 800
Autoregulatory progressive resistance exercise: linear versus a velocity-based flexible model 500
Spatial Political Economy: Uneven Development and the Production of Nature in Chile 400
山海经图录 李云中版 400
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 物理化学 催化作用 细胞生物学 免疫学 冶金
热门帖子
关注 科研通微信公众号,转发送积分 3327916
求助须知:如何正确求助?哪些是违规求助? 2958108
关于积分的说明 8589214
捐赠科研通 2636402
什么是DOI,文献DOI怎么找? 1442937
科研通“疑难数据库(出版商)”最低求助积分说明 668449
邀请新用户注册赠送积分活动 655663