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On the basis of the materials collected on the scene of accident, this mine is a coal and gas outburst mine and it has complicated geological conditions[5].
The method of tunnel supporting system is the metal stents and its material is heavy-duty rail and that has a trapezoid section.
(2) According to the calculation of the peak of pressure at every point, we can use relevant anti-blast structures and anti-explosion materials to guide the design of the anti-blast engineering
References [1] Chen Hong, Qi Hui, Tan Hui: China Mining Magazine Vol. 14(2005), p. 64 (in Chinese) [2] YIN Changwang: Coal Technology Vol. 26(2007), p. 72 (in Chinese) [3] Lin Baiquan: Journal of coal science and engnieering Vol. 4(1998), p. 53 (in Chinese) [4] Peter N, Daniele B: J Loss Prevention in Process Industries Vol. 15(2002), p. 189 (in Chinese) [5] Xueyi Hu: Blasting Vol. 20(2003), p. 3 (in Chinese) [6] Xiantang Zhang, Xiaoming Zhang, Yuanping Sun, Xiaochen Zhou: Journal of Shandong University of Science and Technology(Natural Science), Vol. 29 (2010), p. 48 (in Chinese) [7] FENG Changgen, CHEN Linshun & QIAN Xinming: Journal of Safety and Environment Vol. 1(2001), p. 56 (in Chinese) [8] Gao Taiyin, Huang Juntao, Li Yuanming, Gao Yue, Xin Yibing: Explosion and Shock Waves Vol. 18(1998), p. 323 (in Chinese) [9] Li Run-zhi: Explosion and Shock Waves Vol. 30(2010), p. 529 (in Chinese) [10] Zhao Hengyang: Theory of gas and dust explosion( Beijing Institute of Technology
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The use of fiberglass materials is especially widespread, as an affordable and already well-studied material.
Devyaterikova, Composite tube damage evaluation in aggressive oil-gas field, IOP Conference Series: Materials Science and Engineering, 986, (2020), 012040
Asiri Adel Badghaish, Saudi aramco details nonmetallic products deployment in oil, gas, Oil & Gas Journal, 53 (2018)
Series: Materials Science and Engineering.
International Scientific Practical Conference on Materials Science 889 (2020) 012020.

The main reasons are: ● The disorder of the organization, management and use of materials lead to a large difference between the production gradation and design gradation.
Journal of Highway and Transportation Reseach andk Development，2001，18(6):20-24.
Journal of Tongji University(Natural Science)，2007，12(35):1621-1626.
Journal of Chang′an University(Natural Science Edition)，2006，26(3):96-99.
Journal of Materials in Civil Engineering，1998，10(2):76-85.

The abundance and availability of agricultural by-product make them good source as the raw materials for activated carbon production.
Experimental Selections of Raw Materials.The preparation of activated carbon involves selection of raw material, raw material analysis and preparation of activated carbon.
Futher heating above 400oC demonstrate a constant trend of weight loss indicating the formation of volatile carbon materials like CO and CO2 [2].
Journal of Microporous and Mesoporous Materials. 52. 105-117
Dewi, (2010), “ESR Study of Electron Trapped on Activated Carbon bu KOH and ZnCl2 Activation”, Journal of Materials Science and Engineering, Vo. 4, Number 3, pg.21-25.

With unique machining method, lesser cutting force and no thermal influence on target material, the AWJ has a wide range of machinable materials [1].
The impact pressure of waterjet is prone to cause crack in brittle materials because of the stress waves interference or distortion up to remove in plastic materials [8].
Hence, under the action of stagnancy layer, static pressure cracks will occur in brittle materials and plastic distortion will occur in plastic materials.
Under the action of contact stress, micro-cracks in brittle materials or irreversible deformations in plastic materials will occur on the bound of contact crater where contact stress reaches maximum.
Momber: Experimental Thermal and Fluid Science, Vol.25 (2001), pp.31-41

The heating period of EUROCODE model can be described as (3) Where, , , is the ventilation factor; is the thermal inertia of wall materials; is the thermal conductivity of wall materials; is the massive density of wall materials; is the specific heat of wall materials.
Table 2 Statistical properties of materials Material Mean value (MPa) Standard deviation (MPa) Coefficient of variation Distribution type C60 46.17 4.661 0.101 Normal HRB400 448 26.8 0.060 Normal The randomness of fire and materials at room temperature together contribute to the randomness of materials during the fire.
Lu, Reliability of four-face fired reinforcement concrete columns, Journal of Huazhong University of Science & Technology (Natural Science Edition). 12 (2008) 125-127 (in Chinese)
Sultan, Effect of temperature on thermal properties of high-strength concrete, Journal of Materials in Civil Engineering. 15 (2003) 101-107
Journal of Harbin University of Commerce (Natural Sciences Edition). 20 (2004) 604-607(in Chinese)

Abtew, "Lead-free Solders in Microelectrics," Materials Science and Engineering, vol. 27, pp. 95-141, 2000
Kim, "Sn–Zn low temperature solder," Journal of Materials Science: Materials in Electronics, vol. 18, pp. 121-127, 2007
Peng, "Influence of minor Bi additions on the interfacial morphology between Sn–Zn–xBi solders and a Cu layer," Journal of Materials Science: Materials in Electronics, vol. 20, pp. 1112-1117, 2009
Yu, "Development of Sn–Zn lead-free solders bearing alloying elements," Journal of Materials Science: Materials in Electronics, vol. 21, pp. 1-15, 2010
Jung, "Solid state intermetallic compound layer growth between Sn-8Zn-3Bi solder and bare copper substrate," Journal of Materials Science: Materials in Electronics, vol. 16, pp. 523-528, 2005

Preparation and characterization of fly ash and aluminium waste geopolymer Sujitra Onutai1, 2, a , Sirithan Jiemsirilers1,2, b , Shigetaka Wada1, 2 and Parjaree Thavorniti 1 Research Unit of Advanced Ceramics, Department of Materials Science, Faculty of Science, Chulalongkorn University, Bangkok, 10330,Thailand 2 Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University, Bangkok, 10330, Thailand 3 National Metal and Materials Technology Center, Klong Luang, Phathumthani, 10120, Thailand asujitra.onutai@gmail.com, bsirithan.j@chula.ac.th Keywords: Geopolymer, Fly ash, Aluminium waste Abstract Geopolymer is made from three dimensional amorphous structures of alumino-silicate materials.
Acknowledgments The authors also would like to thank Research Unit of Advanced Ceramics, Department of Materials Science, Faculty of Science, Chulalongkorn University, Center of Excellence on Petrochemical and Materials Technology, Chulalongkorn University and Thailand Graduate Institute of Science and Technology (TGIST).
International Journal of Minerals, Metallurgy and Materials. 16 (2009) 720-726
Materials Science and Engineering: A. 528 (2011) 7395-7401
International Journal of Inorganic Materials. 2 (2000) 309-317.

The paper presents the materials on researching the use of current conductor copper waste for getting new functional materials.
The researches [1, 2] demonstrate the use of industrial waste, such as copper slag, silica, and polymer materials for manufacturing new materials with special properties.
The given paper presents the materials on researching the use of current conductors copper waste for getting new functional materials.
Kumaravel, Construction materials from industrial wastes - A review of current practices, International Journal of Environmental Research and Development.
Dyadichev, Corrosion and Corrosion Protection of Materials, Monograph: Simferopol: Antiqua LLC, 2019

Khatak, Baldev Raj, Materials Science and Engineering A 407 (2005) 188–195
Debbouz, Journal of Materials Science 34 (1999) 1073
Navaï, Journal of Materials Science 30 (1995) 1166
Bhattacharya, Materials Characterization 54 (2005) 141
De, Journal of Nuclear Materials 334 (2004) 115–132 [32] Daisuke Shintani, Toshio Ishida, Hirokazu Izumi, Tomokazu Fukutsuka, Yoshiaki Matsuo, Yosohiro Sugie, Corrosion Science 50 (2008) 2840–2845