构造带内巷道定向聚能爆破掘进围岩损伤特征试验研究

doi:10.13722/j.cnki.jrme.2018.0344

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Abstract The disorderly propagation of cracks formed by the traditional drilling blasting is liable to cause gas dynamic disasters when encountered with the tectonic coal and rock. Tunneling in structural coal and rock with directional concentrated energy blasting is studied in this paper. The mechanical model of rock fracturing under shaped energy blasting is established and the crack initiation and propagation under shaped energy blasting and ordinary blasting are compared and analyzed. The comminuted zone formed by shaped energy blasting and ordinary blasting and the multiple relations of peak stress are obtained. A blasting experimental platform for simulating ground stress and gas pressure was set up，the coal and rock blocks containing structural weak coal seam were constructed，and the modelling experiments under common blasting and shaped blasting were carried out. The experimental results show that the crushed area formed in the shaped energy direction is 0.838 times of that in the same direction under the ordinary blasting，the peak stress value is 1.58 times of that of the ordinary blasting. Compared with that of the ordinary blasting，the period of static action of the explosive gas was prolonged 300 μs in the direction of shaped energy，and was shortened 250 μs in the direction of non-shaped energy. The crack propagation range in the shaped energy direction is increased and the crack propagation range in the non-accumulative energy direction is reduced. The blasting efficiency was improved when the shaped blasting was applied to the tunneling in structural belt. The damage degree to supporting rock mass and structural coal was reduced，and the gas dynamic disaster accident induced by blasting excavation was restrained.

Key words： rock mechanics cumulative blasting tunnel excavation structural coal coal and gas outburst damage characteristics

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	Articles by authors
	ZHU Feihao1
	2
	LIU Zegong1
	2
	GAO Kui1
	2
	LIU Jian1
	2

Cite this article:

ZHU Feihao1,2,LIU Zegong1, et al. Experimental study on rock damage of roadway excavation by cumulative blasting in structural coal[J]. , 2018, 37(9): 2037-2047.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2018.0344 OR http://www.rockmech.org/EN/Y2018/V37/I9/2037

[2]	国家安全生产监督管理总局和国家煤矿安全监察局网站事故查调查处理[EB/OL]. http：//www.chinasafety.gov.cn/newpage/zwgk/ tdsgdccl/zwgk_tdsgdccl_lm.htm，2015-08-15.(Investigation and Handling of Accidents on the Websites of the State Administration of Work Safety and the State Administration of Coal Mine Safety[EB/OL]. http：//www.chinasafety.gov.cn/newpage/zwgk/tdsgdccl/zwgk_tdsgdccl_ lm.htm，2015-08-15.(in Chinese))
[3]	罗勇，沈兆武. 聚能爆破在岩石控制爆破中的研究[J]. 工程爆破，2005，11(3)：9-13.(LUO Yong，SHEN Zhaowu. Study on cumulative explosion of controlled blasting of rock mass[J]. Engineering Blasting，2005，11(3)：9-13.(in Chinese))
[13]	宗琦. 岩石炮孔预切槽爆破断裂成缝机理研究[J]. 岩土工程学报，1998，20(1)：30-33.(ZONG Qi. Investigations into mechanism of fracture formation for grooved hole-well blasting[J]. Chinese Journal of Geotechnical Engineering，1998，20(1)：30-33.(in Chinese))
[5]	郭德勇，吕鹏飞，单智勇，等. 瓦斯抽放煤层增透深孔聚能爆破钻孔参数[J]. 北京科技大学学报，2013，35(1)：16-20.(GUO Deyong，LV Pengfei，SHAN Zhiyong，et al. Drilling parameters of deep-hole cumulative blasting to improve coal seam permeability in gas drainage[J]. Journal of University of Science and Technology Beijing，2013，35(1)：16-20.(in Chinese))
[8]	穆朝民，王海露，黄文尧，等. 高瓦斯低透气性煤体定向聚能爆破增透机制[J]. 岩土力学，2013，34(9)：2 496-2 500.(MU Chaomin，WANG Hailu，HUANG Wenyao，et al. Increasing permeability mechanism using directional cumulative blasting in coal seams with high concentration of gas and low permeability[J]. Rock and Soil Mechanics，2013，34(9)：2 496-2 500.(in Chinese))
[15]	戴俊. 柱状装药爆破的岩石压碎圈与裂隙圈计算[J]. 辽宁工程技术大学学报：自然科学版，2001，20(2)：144-147.(DAI Jun. Calculation of radii of the broken and cracked areas in rock by a long charge explosion[J]. Journal of Liaoning Technical University：Natural Science，2001，20(2)：144-147.(in Chinese))
[18]	穆朝民，齐娟. 爆炸荷载作用下煤体裂纹扩展机理模型实验研究[J]. 振动与冲击，2012，31(13)：58-61.(MU Chaomin，QI Juan. Model investigation on cracks propagation in coal under blast loading[J]. Journal of Vibration and Shock，2012，31(13)：58-61.(in Chinese))
[1]	常未斌，樊少武，张浪，等. 基于爆炸应力波和构造煤带孕育煤与瓦斯突出危险状态的模型[J]. 煤炭学报，2014，39(11)：2 226- 2 231.(CHANG Weibin，FAN Shaowu，ZHANG Lang，et al. A model based on explosive stress wave and tectonic coal zone which gestate dangerous state of coal and gas outburst[J]. Journal of China Coal Society，2014，39(11)：2 226-2 231.(in Chinese))
[11]	何满潮，曹伍富，单仁亮，等. 双向聚能拉伸爆破新技术[J]. 岩石力学与工程学报，2003，22 (12)：2 047-2 051.(HE Manchao，CAO Wufu，SHAN Renliang，et al. New blasting technology-bilateral cumulative tensile explosion[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(12)：2 047-2 051.(in Chinese))
[9]	夏彬伟，刘承伟，卢义玉，等. 缝槽水压爆破导向裂缝扩展实验研究[J]. 煤炭学报，2016，41(2)：432-438.(XIA Binwei，LIU Chengwei，LU Yiyu，et al. Experimental study of propagation of directional fracture with slotting hydraulic blasting[J]. Journal of China Coal Society，2016，41(2)：432-438.(in Chinese))
[19]	刘健，刘泽功，高魁，等. 深孔定向聚能爆破增透机制模拟试验研究及现场应用[J]. 岩石力学与工程学报，2014，33(12)：2 490-2 496.(LIU Jian，LIU Zegong，GAO Kui，et al. Experiment study and application of directional focused energy blasting in deep boreholes[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(12)：2 490-2 496.(in Chinese))
[6]	郭德勇，宋文健，李中州，等. 煤层深孔聚能爆破致裂增透工艺研究[J]. 煤炭学报，2009，34(8)：1 086-1 089.(GUO Deyong，SONG Wenjian，LI Zhongzhou，et al. Research on splitting technical of coal bed deep-hole cumulative blasting to improve permeability[J]. Journal of China Coal Society，2009，34(8)：1 086-1 089.(in Chinese))
[16]	YANG Y，GAO Q，YU M，et al. Experimental study of mechanism and technology of directed crack blasting[J]. Journal of China University of Mining and Technology，1995，5(2)：69-77.
[7]	郭德勇，吕鹏飞，王义贵，等. 深孔聚能爆破煤层增透爆破参数研究[J]. 北京科技大学学报，2013，35(12)：1 533-1 537.(GUO Deyong，LV Pengfei，WANG Yigui，et al. Blasting parameter study of deep-hole cumulative blasting to improve coal seam permeability[J]. Journal of University of Science and Technology Beijing，2013，35(12)：1 533-1 537.(in Chinese))
[17]	刘健，刘泽功，高魁. 深孔爆破在综放开采坚硬顶煤预先弱化和瓦斯抽采中的应用[J]. 岩石力学与工程学报，2014，33(增1)：3 361-3 367.(LIU Jian，LIU Zegong，GAO Kui，et al. Application of deep borehole blasting to top-coal pre-weakening and gas extraction in fully mechanized caving[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(Supp.1)：3 361-3 367.(in Chinese))
[4]	郭德勇，赵杰超，吕鹏飞，等. 煤层深孔聚能爆破动力效应分析与应用[J]. 工程科学学报，2016，38(12)：1 681-1 687.(GUO Deyong，ZHAO Jiechao，LV Pengfei，et al. Dynamic effects of deep-hole cumulative blasting in coal seam and its application[J]. Chinese Journal of Engineering，2016，38(12)：1 681-1 687.(in Chinese))
[10]	郭德勇，裴海波，宋建成，等. 煤层深孔聚能爆破致裂增透机理研究[J]. 煤炭学报，2008，33(12)：1 381-1 385.(GUO Deyong，PEI Haibo，SONG Jiancheng，et al. Study on splitting mechanism of coal bed deep-hole cumulative blasting to improve permeability[J]. Journal of China Coal Society，2008，33(12)：1 381-1 385.(in Chinese))
[12]	郭德勇，商登莹，吕鹏飞，等. 深孔聚能爆破坚硬顶板弱化试验研究[J]. 煤炭学报，2013，38(7)：1 149-1 153.(GUO Deyong，SHANG Dengying，LU Pengfei，et al. Experimental research of deep-hole cumulative blasting in hard roof weakening[J]. Journal of China Coal Society，2013，38(7)：1 149-1 153.(in Chinese))
[14]	郭德勇，吕鹏飞，裴海波，等. 煤层深孔聚能爆破裂隙扩展数值模拟[J]. 煤炭学报，2012，37(2)：274-278.(GUO Deyong，LV Pengfei，PEI Haibo，et al. Numerical simulation on crack propagation of coal deep-hole cumulative blasting[J]. Journal of China Coal Society，2012，37(2)：274-278.(in Chinese))
[20]	杨仁树，张召冉，杨立云，等. 基于硬岩快掘技术的切缝药包聚能爆破试验研究[J]. 岩石力学与工程学报，2013，32(2)：317-323.(YANG Renshu，ZHANG Zhaoran，YANG Liyun，et al. Cumulative blasting experiment study of slotted cartridge based on hard-rock rapid driving technology[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(2)：317-323.(in Chinese))