Influence of hydraulic fracturing parameters of reused coal pillar roadway on pressure relief effect
-
摘要: 针对煤柱留巷围岩变形控制采用的水力压裂卸压技术，为确定水力压裂参数，以山西晋城无烟煤矿业集团有限责任公司长平煤矿43122煤柱留巷为研究对象，利用平面离散元UDEC软件对水力压裂钻孔压裂次数和压裂位置对卸压效果的影响进行了数值模拟。结果表明：压裂分段长度越大，相应压裂次数越少，水力压裂对顶板的弱化效果越差，压裂分段长度以不超过4 m为宜；压裂钻孔位于下区段工作面煤柱侧时会引起煤柱应力升高，压裂钻孔位于上区段工作面采空区侧和煤柱上方时均能实现煤柱应力降低，其中压裂钻孔位于上区段工作面采空区侧时卸压效果最明显。根据数值模拟结果确定的水力压裂参数进行了现场试验，结果表明，采用水力压裂卸压后，煤柱留巷围岩变形稳定期较未压裂时缩短33.3%，煤柱留巷顶底板移近量和两帮移近量较未压裂时分别降低63.5%和45.5%，煤柱留巷围岩变形量显著减小。Abstract: Hydraulic fracturing pressure relief technology is used to control surrounding rock deformation of reused coal pillar roadway. In order to determine parameters of hydraulic fracturing, 43122 reused coal pillar roadway of Changping Coal Mine of Shanxi Jincheng Anthracite Mining Group Co., Ltd. was taken as research object, influence of fracturing times and fracturing positions on pressure relief effect were numerically simulated by use of plane discrete element UDEC software. The results show that the longer the fracturing segment length is, the less the corresponding fracturing times will be, and the weaker the effect of hydraulic fracturing on roof will be. Fracturing segment length should not exceed 4 m. Fracturing borehole will increase stress of coal pillar when it is located at coal pillar side of lower section working face, and reduce stress of coal pillar when it is located at goaf side of upper section working face and above the coal pillar, and pressure relief effect is the most obvious when fracturing borehole is located at goaf side of upper section working face. The hydraulic fracturing parameters determined by numerical simulation results were tested in field, the results show that after hydraulic fracturing is used for pressure relief, deformation stability period of surrounding rock of reused coal pillar roadway is 33.3% shorter than that of non-fractured roadway, and displacement of roof and floor and two side walls of reused coal pillar roadway is 63.5% and 45.5% lower than that of non-fractured roadway, which indicates deformation of surrounding rock of reused coal pillar roadway decreased significantly.
-
-
期刊类型引用(16)
1. 程刚，陈杰，潘泽烨，魏溢凡，陈森森. 基于水传热和红外热成像的煤矸识别方法. 工矿自动化. 2024(01): 66-71+137 . 
本站查看
2. 李嘉豪，司垒，王忠宾，魏东，顾进恒. 综放工作面煤矸识别技术及其应用. 仪器仪表学报. 2024(01): 1-15 . 百度学术
3. 高琳，于鹏伟，董红娟，梁朝辉，张志远. 基于机器视觉的煤矸石识别方法综述. 科学技术与工程. 2024(26): 11039-11049 . 百度学术
4. 冯永安，韩晓天，刘铁，吕伏. 2020–2021年陕晋冀地区五种破坏类型井下构造煤的深度学习图像数据集. 中国科学数据(中英文网络版). 2024(04): 383-390 . 百度学术
5. 李伟，刘化广. 基于LBP算法的SVM煤矸识别. 黑龙江科技大学学报. 2023(02): 153-158+166 . 百度学术
6. 张光磊，汪海涛，张磊. 基于虚拟现实技术的综放工作面仿真研究. 自动化技术与应用. 2023(06): 62-65+86 . 百度学术
7. 王闰泽，郎利影，席思星. 用于智能煤矸分选机器人的改进型VGG网络煤矸识别模型. 煤炭技术. 2022(01): 237-241 . 百度学术
8. 杨胜利 ，王家臣 ，李明 . 煤矿采场围岩智能控制技术路径与设想. 矿业科学学报. 2022(04): 403-416 . 百度学术
9. 张红，李晨阳. 基于光学图像的煤矸石识别方法综述. 煤炭工程. 2022(07): 159-163 . 百度学术
10. 申利飞，田子建，白林绪. 改进纹理模糊筛选下煤矸石X射线图像处理. 激光与红外. 2022(07): 1090-1097 . 百度学术
11. 司垒，谭超，朱嘉皓，王忠宾，李嘉豪. 基于X射线图像和激光点云的煤矸识别方法. 仪器仪表学报. 2022(09): 193-205 . 百度学术
12. 朱金波，尹建强，杨晨光，周伟，朱宏政，张勇，史苘桧，曾秋予，郭永存，杨科. 矿物组分对智能分选X射线识别规律研究. 洁净煤技术. 2021(01): 202-208 . 百度学术
13. 胡璟皓，高妍，张红娟，靳宝全. 基于深度学习的带式输送机非煤异物识别方法. 工矿自动化. 2021(06): 57-62+90 . 本站查看
14. 尹建强，朱金波，曾秋予，杨晨光，张勇，史苘桧. X射线煤矸识别过程中图像分割精度研究. 选煤技术. 2021(04): 24-29 . 百度学术
15. 杜京义，史志芒，郝乐，陈瑞. 轻量化煤矸目标检测方法研究. 工矿自动化. 2021(11): 119-125 . 本站查看
16. 李黎，熊英，荆瑞俊. 基于支持向量机的煤矸识别研究. 山西电子技术. 2021(06): 85-87 . 百度学术
其他类型引用(9)
计量
- 文章访问数: 83
- HTML全文浏览量: 13
- PDF下载量: 13
- 被引次数: 25
下载:
