Study on the Structure Characteristics and Ground Pressure Behavior of Overlying Strata with Shallow Buried Coal Seam

Abstract:

The mine pressure behavior characters of shallow buried coal seam differed from both shallow seam mining and general depth seam. Mine pressure observation and numerical analysis were applied to research mine pressure behavior laws in fully mechanized face of shallow buried coal seam with thick bedrock and thin alluvium. It showed that the ground subsidence level phenomenon did not appear obviously although with obvious dynamic loading of fully mechanized face during the pressure period. The appearance was due to non-synchronized fracture from two key layers in the overlying rock layers and their interaction, which leaded to roof breaking initially and caving rocks with the form of an arch. Due to the periodic breaking and caving characteristics appearing as fully cut-down and arch alternately, the periodic pressure of shallow buried coal seam face showed as different size. The conclusion could be a reference for similar working face control.

• Periodical: Advanced Materials Research (Volumes 255-260)
• Pages: 3780-3785
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.255-260.3780
• Online since: May 2011
• Authors: Lei Yu, Zhi Zhong Fan, Gang Xu
• Keywords: Fully Mechanized Face, Mine Pressure Behavior Laws, Overburden Structure, Shallow Buried Coal Seam

References

[1] Minggao Qian, Pingwu Shi. Mine ground Pressure and Strata Control[M]. China of University Mining and Technology Press, Xuzhou(2003), in Chinese.

[2] Qingxiang Huang. Study on Roof Strata and Control in Shallow Seam Longwall Mining. China of University Mining and Technology Press, Beijing (2000), in Chinese.

[3] Shenlin Zhao, Hongzhu Zhao. Technology in Underground Mining of Buried Depth and Thin Bed Rock. China of University Mining and Technology Press, Xuzhou (2003), in Chinese.

[4] Wenjun Zhang, Haihong Shen,Cai Guibao. Numerical Analysis on Movement Rule of Overlying Strata of Shallow Coal Seam Covered with Thin Bedrock. Journal of Liaoning Technical University (Natural Science Edition) Vol.21(2002), pp.143-145.

[5] Zhongjie Hou, Jie Zhang. Protection Pillar Stability Nnmerical Simulation in Shallow Seam Covered with Rock Soil and Sand. Chinese Journal of Rock Mechanics and Engineering Vol.24 (2005), pp.2255-2259.

[6] Xinyuan Li, Peihua Chen. Study on Regularuty of Stryctural Behaviours Around Coal Face Under The Shallow-buried Loose Roof.Chinese Journal of Rock Mechanics and Engineering Vol.24 (2004), pp.3305-3309.

[7] Yanfang Ren. Study on Roof Strata and Characteristic in Shallow Seam Longwall Mining. China Coal Research Institute, Beijing (2008), in Chinese.

[8] Yuanwei Shi. The principle and techniques of surrounding rock control in coal face. China of University Mining and Technology Press. Xuzhou (2003), in Chinese.

[9] Zhifa Lu. Study on Strata Mechanical Structure and Support Adaptability of Shallow Seam. China Coal Research Institute, Beijing(2007), in Chinese.

[10] Wenxiang Wu. Research on Failure Laws of Overlying Rock and Support Resistance in Fully-mechanized Face in Shallow Seam of Thick Clay Layers. Xi'an University of Science and Technology, Xi'an(2007), in Chinese.

[11] Benqiang Shi, Zhoujie Hou. Post-buckling behavior for roof strata in shallow seam longwall mining. Vol.24(2007), pp.357-360.

[12] Beijing Mining Dept. of Tiandi Science & Technology co. Ltd. Research on strata-pressure behavior and control technique of Tang Gonggou Mine, Beijing(2008), in Chinese.

[13] Lei Yu. Research about Strata behavior regularity of Fully mechanized face from Cover rock shallow coal seam. Liaoning Engineering Technology University, Fuxin(2009), in Chinese.