Investigation on surface cracking and roof caving in overlying goaf during mining of 30#orebody in Huangshan Copper-Nickel Mine
  
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DOI:10.3969/j.issn.1671-4172.2020.01.001
KeyWord:surface cracking; roof fall; subsidence area; microseismic monitoring
                       
AuthorInstitution
SHI Feng1,2 (1.北京矿冶科技集团有限公司,北京 ; 2.金属矿山智能开采技术北京市重点实验室,北京 ; 3.新疆亚克斯资源开发股份有限公司,新疆 哈密 )
HUANG Fakai3 (1.北京矿冶科技集团有限公司,北京 ; 2.金属矿山智能开采技术北京市重点实验室,北京 ; 3.新疆亚克斯资源开发股份有限公司,新疆 哈密 )
WANG Ping1,2 (1.北京矿冶科技集团有限公司,北京 ; 2.金属矿山智能开采技术北京市重点实验室,北京 ; 3.新疆亚克斯资源开发股份有限公司,新疆 哈密 )
HE Deqiang3 (1.北京矿冶科技集团有限公司,北京 ; 2.金属矿山智能开采技术北京市重点实验室,北京 ; 3.新疆亚克斯资源开发股份有限公司,新疆 哈密 )
CAI Yongshun1,2 (1.北京矿冶科技集团有限公司,北京 ; 2.金属矿山智能开采技术北京市重点实验室,北京 ; 3.新疆亚克斯资源开发股份有限公司,新疆 哈密 )
GONG Yuanzhang3 (1.北京矿冶科技集团有限公司,北京 ; 2.金属矿山智能开采技术北京市重点实验室,北京 ; 3.新疆亚克斯资源开发股份有限公司,新疆 哈密 )
YUAN Bensheng1,2 (1.北京矿冶科技集团有限公司,北京 ; 2.金属矿山智能开采技术北京市重点实验室,北京 ; 3.新疆亚克斯资源开发股份有限公司,新疆 哈密 )
LIU Qiang1,2 (1.北京矿冶科技集团有限公司,北京 ; 2.金属矿山智能开采技术北京市重点实验室,北京 ; 3.新疆亚克斯资源开发股份有限公司,新疆 哈密 )
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Abstract:
      The roof of the overlying goaf was easy to fall in a wide range and penetrate the surface during the mining process of No.30 orebody in Huangshan Copper-Nickel Mine. A microseismic monitoring system was established and optimized to effectively monitor the regularity of surface cracking and roof caving in overlying goaf. Results indicated that three sudden increases in microseismic events occurred near the surface and the range of roof rupture decreased gradually from May to June 2019. The microseismic events tended to 32# subsidence area and its eastern development, and there was a penetrating trend between the surface and the roof gradually. The stress characteristic of surface rock mass was analyzed based on microseismic events, which can provide technical guarantee for safe production of mines.
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