Coal Mine Hydraulic Fracturing Underground Drainage Research and Engineering Application

Abstract:

Using elastic mechanics and fracture mechanics, analyzing the coal seam hydraulic fracturing breakdown pressure, given its theoretical formula. According to hydraulic fracturing stress status, given the form of two typical hydraulic fracture morphology. Analyzing hydraulic fracturing highly elliptical shape. The displacement field in plane stress state is given, and the theoretical formula of fracturing radius of hydraulic fracturing is deduced. The fracturing technology of underground fracturing is presented, and the fracturing location and fracturing parameters are determined. In Sihe Coal Mine conducted fracturing test, the test results showed that: the average of drainage volume of fracturing hole improved 4.4 times compared with non-pressed-hole. The extraction compliance time is reduced by 38%. Roadway tunneling speed was improved by 15%. It can solve the problem of gas overrun in roadway excavation well, and has a good application and popularization value.

• Periodical: Applied Mechanics and Materials (Volume 863)
• Pages: 334-341
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.863.334
• Online since: February 2017
• Authors: Jun Hui Fu*, Guang Cai Wen, Fu Jin Lin, Hai Tao Sun, Ri Fu Li, Wen Bin Wu
• Keywords: Fracturing Pressure, Fracturing Radius, Ground Hydraulic Fracturing, Underground Drainage

References

[1] B. X. Huang, Coal and rock mass hydraulic fracturing weakening theory and research application, Xuzhou: China University of Mining and Technology, (2009).

[2] B. X. Huang, G. ZH. Deng, C. Y. Liu, Coal and rock mass hydraulic fracturing weakening technology and progress, China Eng. Sci. 9(4) (2007) 83-88.

[3] G. ZH. Deng, Coal crack soften theory and application, Xi an: Shanxi science and technology press, (2003).

[4] J. H. Fu, The impact of research on the stope underground pressure by Coal Seam Hydraulic fracturing anti-reflection and weaken, Xuzhou, China University of Mining and Technology, (2011).

[5] B. X. Huang, CH. Y. Liu, Q. Y. Cheng, Failure analysis of coal and rock meso structural by Fracture water pressure, Hunan Univ. Sci. Technol. J 24(1) (2009) 1-4.

[6] Q. Y. Cheng, B. X. Huang, Fracture mechanics analysis of water pressure of crack propagation of hole wall, new theories and technologies of Coal mining, China University of Mining and Technology press, 2006, 284-289.

[7] G. ZH. Deng, SH. B. Wang, B. X. Huang, Characteristic research of coal water pressure crack propagation behavior, Rock Mech. Eng. 23(20) (2004) 3489-3493.

[8] G. ZH. Deng, SH. B. Wang, B. X. Huang, G. D. Wang, etc. Pressure parameters theory analysis of crack of water expansion of hole wall, Xi'an U. Sci. Technol. J. 23(24) (2003) 361-364.

[9] Z. Zh, H. Kim, B. Haimson, Hydraulic fracturing initiation in granite, Rock Mechanics, Aubertin, Hassani and Mitri(eds), Balkema Publishers, Rotterdam, 1996, 1279-1284.

[10] X. M. Wu, Z. H. Tu, The analysis of Coal Seam hydraulic fracturing typical fracture morphology and the confirmation of basic size, Earth Science-China Univ. Geosci. J. 20(1) (1995) 112-116.

[11] H. L. Ewalds, R. J. H. Wanhill, Y. C. Zhu, S. Y. Pu, et al., Translated. Fracture Mechanics, Beijing: Beijing University of Aeronautics and Astronautics Press, (1988).