1.School of Energy and Mining Engineering，China University of Mining & Technology (Beijing), Beijing ,China;2.Beijing Key Laboratoryfor Precise Mining of Intergrown Energy and Resources, China University of Mining and Technology (Beijing),Beijing ,China;3.NationalDemonstration Center for Experimental Safe Coal Mining and Geological Guarantee Education,China University of Mining and Technology(Beijing), Beijing ,China;4.Beijing University of Posts and Telecommunications, Beijing ,China

为了解决华丰煤矿冲击地压频发、破坏严重的安全生产难题,采用理论分析、相似模拟、数值模拟等综合研究方法,分析了华丰煤矿冲击地压发生的影响因素，在此基础上，提出了“负煤柱”理念，作为一种有效的防冲开采技术，对负煤柱巷道布置防治冲击地压机理进行了分析研究，并提出了负煤柱开采保护层的防冲新方法。研究结果表明：巨厚砾岩层、煤层埋深是华丰煤矿冲击地压的动力能量来源；在高应力作用下，回采工作面会形成煤柱型冲击地压，而煤层倾角32°是造成工作面上平巷冲击地压频发的原因；负煤柱巷道布置开采突破了巷道承载与埋深相关的常识性束缚,负煤柱开采保护层的新方法实现了被保护层充分、连续卸压;生产实践中，结合负煤柱巷道布置开采的矿山压力显现特征，工作面巷道变形得到有效控制，工作面推进速度显著提高，实现了冲击地压的“有震无害”及冲击地压工作面的安全开采。

In order to solve the serious damage safety production problems of the mine rock bursts frequently occurred in Huafeng Mine, a theoretical analysis, similar simulation, numerical simulation and other comprehensive study method were applied to study and analyze the factors affected to the mine rock bursts occurred in Huafeng Mine. Based on the circumstances, a "negative coal pillar" idea was provided and could be an effective mining technology with the rock burst prevention. An analysis and study was conducted on the rock burst prevention mechanism of the negative coal pillar gateway layout. The paper stated the new characteristics of the overburden strata migration in the negative coal pillar gateway layout. A new method of the protective layer for the non pillar mining was provided. The study result showed that the geological tectonics and the seam depth would be the dynamic energy sources of the mine rock burst in Huafeng Mine. Under the function of the high stress, the coal mining face in Huafeng Mine would appear a coal pillar type rock burst and the 32° inclination of the seam would be the cause of the mine rock bursts frequently occurred in the top gateway of the coal mining face. It was found that the load of the gateway was only related to the height of the caving zone and could change the common sense understanding on the seam depth related. The new method of the protective layer for the non coal pillar mining could realize the protected layer to have fully and continuously the pressure released. In the production practices, in combination with the two methods of the mining with the negative coal pillar gateway layout and the non coal pillar mining with the protective layer, the gateway deformation of the coal mining face was effectively controlled and the pushing rate of the coal mining face was obviously improved. The rock burst seam with “seismic and non-damage” was realized and the safety mining of the coal mining face with the rock burst was realized.