首页|地质因素对土城矿瓦斯赋存的控制作用

地质因素对土城矿瓦斯赋存的控制作用

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根据矿区大地构造位置、构造演化和区域构造应力场的特点,分析了土城矿构造特征及其对煤层瓦斯的控制作用,发现土城矿处于盘江矿区"三角形弧系"构造应力场作用下的强变形区内,发育的NE向、NW向断裂构造是矿井瓦斯赋存和构造煤发育的控制因素,大中型断层控制着矿井瓦斯赋存与分布,而小型构造是煤与瓦斯突出的控制因素.土城矿井田西部发育的大中型断裂形成了煤层瓦斯运移和逸散的通道,不利于煤层瓦斯的保存,导致该区域煤层瓦斯含量相对低;井田东部的断裂构造不发育,煤层整体上保存较为完整,煤层瓦斯含量整体较高.小型断层附近瓦斯富集、构造煤发育,尤其在断层上盘、断层尖灭端与断层交汇的地段,煤体破坏严重,是煤与瓦斯突出事故易发地段.土城矿瓦斯防治工作应分区域实施,井田西部应关注煤层瓦斯含量随埋深增大而增加的规律并及时防范深部区域可能出现的瓦斯灾害,而井田东部则应在强化对隐伏断层探测基础上优先实施开采保护层和抽采煤层瓦斯等综合治理措施.
Control of Geological Factors on Gas Occurrence in Tucheng Mine
Based on the characteristics of the geotectonic location,tectonic evolution and regional tectonic stress field in the mining area,the structural characteristics of Tucheng mine and its control on coal seam gas are analyzed,it is found that the Tucheng mine is located in the strong deformation area under the action of the"triangle arc system"tectonic stress field in the Panjiang mining area,and the NE-and NW-trending faults are the controlling factors for the occurrence of mine gas and the development of structural coal.Large and medium faults control the occurrence and distribution of mine gas,while small structures are the controlling factors of coal and gas outburst.The large and medium-sized faults developed in the western part of Tucheng coal mine formed channels for coal bed gas migration and escape,which are not conducive to the preservation of coal bed gas and lead to a relatively low content in this area.The faults in the eastern part are very few,the coal seam as a whole is well preserved and its gas content is high.Structural coal is developed near the small fault and the gas is assembled,especially in the section of the upper wall of the fault,the tip of the faults and the intersection area of the faults,where the coal seams are seriously damaged,which lead to a greater risk of coal and gas outburst.The gas prevention and control work in different regions in Tucheng mine should be carried out.The law gas content of coal seam increases with the depth of coal should be paid attention to the western area.The gas disasters in deep regions of eastern area should be prevented by comprehensive measures such as carrying out protective seam mining,gas extraction and so on,on the basis of enhancing the detection of hidden faults.

"triangle arc system"structuremine structuregas occurrencecoal and gas outburst

关金锋、周侃、司中应、成春莲、许国胜、王建华

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贵州工程应用技术学院矿业工程学院,贵州毕节 551700

贵州师范大学材料与建筑工程学院(贵州应急管理学院),贵州贵阳 550025

盘州市能源局,贵州盘州 553501

"三角形弧系"构造 矿井构造 瓦斯赋存 煤与瓦斯突出

贵州省科技计划项目&&高层次人才科学研究项目高层次人才科学研究项目贵州省青年科技人才成长项目毕节市科学技术项目

黔科合支撑[2019]2876号黔科合基础ZK[2022]一般165院科合字G2018014号G2018010号黔教合KY字[2022]128号毕科联合[2023]11号

2024

10.3969/j.issn.1674-1803.2024.02.01

中国煤炭地质
中国煤炭地质总局

中国煤炭地质

CSTPCD
影响因子：0.652
ISSN：1674-1803
年,卷(期)：2024.36(2)
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