School of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing
China Pingmei Shenma Energy and Chemical Group Co., Ltd.

为探讨构造应力场对煤与瓦斯突出的控制作用，运用瓦斯地质学、构造物理学和岩石力学方法分析了构造应力场对煤体结构、地应力和煤层瓦斯的作用，结合煤与瓦斯突出实例研究了构造应力场对突出分布、类型和强度的作用，揭示了构造应力场控制煤与瓦斯突出机理和作用形式。研究表明：构造应力场控制煤体结构分布、类型及煤体强度特征，挤压构造应力场是形成构造煤的主要应力作用形式，并于褶皱层间滑动带和压扭性断裂带形成构造煤发育区；构造应力场强度越大，煤体破坏程度越高、煤体强度越低。构造应力场控制地应力类型、大小和方向，强构造应力场作用区域属于大地动力场型并处于高地应力环境，构造应力场方向即地应力的最大水平主应力方向。构造应力场影响煤层瓦斯富集程度，强构造应力场作用区域煤层渗透率低、瓦斯含量高、瓦斯压力大，并于压扭性构造带形成瓦斯富集区。多期构造应力场演化作用造成构造煤、地应力和煤层瓦斯呈区域性分布，进而控制突出的分区分带特征；构造应力场产生的水平挤压作用控制突出类型以压出为主；构造应力场的最大水平主应力方向与巷道轴向夹角越大，应力集中系数越大，突出强度越大；最大水平主应力越大，煤岩体弹性变形能和瓦斯膨胀内能越大，突出强度越大。

To investigate the controlling effect of tectonic stress field on coal and gas outburst, the gas geology, tectonophysics and rock mechanics methods were applied to analyze the influences of tectonic stress field on tectonic coal, in-situ stress and coal seam gas. Based on the case of coal and gas outburst, the effect of tectonic stress field on the distribution, type and strength of coal and gas outburst was studied. The mechanism and action forms of coal and gas outburst controlled by tectonic stress field were revealed. Results show that the tectonic stress field controls the characteristics of coal body structure distribution, coal body structure type and coal body strength. The compressive tectonic stress field is the main form of stress action for the tectonic coal formation, and the compresso-shear fault zone and interlayer-gliding fracture zone of fold form the development area of tectonic coal. The larger the tectonic stress field intensity is, the higher the fracturing degree of the coal body is, and the lower the coal body intensity is. The tectonic stress field controls the type, level and direction of the in-situ stress field. The region dominated by the intensive tectonic stress field belongs to the dynamic stress field and is at the high in-situ stress environment, and the direction of the tectonic stress field is the direction of the maximum horizontal principal stress of in-situ stress. The tectonic stress field affects the coal seam gas enrichment degree. Under the action of the strong tectonic stress field, the coal seam permeability is lower, the gas content and gas pressure are higher, and the compresso-shear structure zone forms the gas enrichment area. Under the action of the multistage tectonic stress filed, the distribution of tectonic coal, in-situ stress and gas of coal seam has the regional characteristic, which controls the partitioning and zonal distribution of coal and gas outburst. The horizontal compressional stress caused by the tectonic stress field controls the coal and gas outburst type dominated by coal and gas press-out. With the increase of the angle between the direction of the maximum horizontal principal stress and the axial direction of the roadway, the stress concentration factor increases and the coal and gas outburst intensity increases gradually. With the increase of maximum horizontal principal stress, the elastic deformation energy of coal and rock mass and gas expansion energy increase and the coal and gas outburst intensity increases. The research results provide a theoretical basis for predicting and preventing coal and gas outburst.

国家自然科学基金重点资助项目(41430640)；国家自然科学基金联合基金重点资助项目(U1704242)

郭德勇，揣筱升，张建国，等. 构造应力场对煤与瓦斯突出的控制作用[J]. 煤炭学报，2023，48(8)：3076−3090.

GUO Deyong，CHUAI Xiaosheng，ZHANG Jianguo，et al. Controlling effect of tectonic stress field on coal and gas outburst[J]. Journal of China Coal Society，2023，48(8)：3076−3090.