煤岩瓦斯动力灾害主控地质体理论及地质作用机理

发布时间：2018-08-10 22:09

【摘要】：为研究煤岩瓦斯动力灾害地质作用机理,初次提出了控制煤岩瓦斯动力灾害的"主控地质体"的概念,并进行了定义及分类,采用理论分析、实验室实验、现场实测及现场考察等手段进行了相关研究。研究认为:煤系地层区域沉积体系、地层层序位置决定着煤层厚度、顶底板岩性及粒度、煤层赋存状况等,越靠近海(湖)侵体系域最大海(湖)泛面位置,煤层瓦斯赋存量越大(顶底板石灰岩煤层除外)、煤层煤岩瓦斯动力灾害危险性越大,解释了煤层群中不同煤层煤岩瓦斯动力灾害程度差异;煤岩瓦斯动力灾害地质作用机理为地层沉积埋藏作用、地质构造作用、热作用、生烃作用等时空配置控制着煤层的改造程度、瓦斯的生成、保存及逸散程度,以及自重应力、构造应力的分布情况,进而控制煤岩瓦斯动力灾害区域分布及灾害程度;初步建立了主控地质体理论、分析方法及判识依据。研究成果在水城矿区进行了应用,验证了该方法的合理性和适用性。
[Abstract]:In order to study the geological action mechanism of coal-rock gas dynamic hazard, the concept of "main controlled geological body" for controlling coal-rock gas dynamic disaster is put forward for the first time, and the definition and classification are carried out. Theoretical analysis and laboratory experiments are adopted. Related research was carried out by means of field measurement and field inspection. It is considered that the stratigraphic sequence position determines the coal seam thickness, roof and floor slate size, coal seam occurrence and so on, and is closer to the largest sea (lake) flooding position in the transgressive system tract of the sea (lake). The greater the amount of gas stored in coal seam (except limestone seam of roof and floor), the greater the risk of coal and rock gas dynamic disaster in coal seam, which explains the difference of dynamic disaster degree of coal gas in different coal seam in coal seam group. The geological mechanism of coal and gas dynamic hazard is stratigraphic sedimentary burial, geological tectonism, thermal action, hydrocarbon generation and so on, which control the degree of transformation of coal seam, the degree of gas generation, preservation and emission, and the gravity stress. The distribution of tectonic stress and the regional distribution and degree of gas dynamic hazard in coal and rock are controlled, and the theory, analysis method and recognition basis of main control geological body are established preliminarily. The research results are applied in Shuicheng mining area, and the rationality and applicability of the method are verified.
【作者单位】：西安科技大学能源学院;重庆大学资源及环境科学学院;
【基金】：国家科技重大专项(2011ZX05040-005-012);国家科技重大专项(2016ZX05045-004) 国家青年科学基金(51404190) 国家重点研发计划(2016YFC0801402)
【分类号】：TD712

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