摘要
为揭示盘江矿区煤与瓦斯突出灾害发生规律,提高瓦斯防治工作的针对性,根据Apriori算法规则的原理和方法,对盘江矿区37起煤与瓦斯突出事故点的瓦斯地质参数进行了统计分析,以最小支持度为40%、最小置信度为75%的二项关联规则基准开展了数据挖掘试验。结果表明:煤层瓦斯压力1~2 MPa与埋深200~400 m、煤厚2~4 m与煤的瓦斯放散初速度≥15mmHg、煤厚2~4 m与煤厚变异系数≤0.2、泥岩厚度≤5 m与围岩强度系数≥2,是具有强关联特征的参数组合类型,盘江矿区发生煤与瓦斯突出地点都呈现浅埋深、高瓦斯压力、厚煤层和围岩强度大的典型特征;在特殊的山地浅埋深条件下(200~400 m),煤层原始地应力往往不大,高瓦斯压力是煤与瓦斯突出的主要影响因素,煤层瓦斯压力普遍达到1~2 MPa;煤厚增大、瓦斯放散初速度高反映出煤体结构受到过强烈破坏,局部发育具有煤与瓦斯突出倾向的构造煤,煤厚变异系数小预示煤层遭受的破坏形式不以煤层局部变异为特征,可能存在以分层构造煤特征的煤体结构破坏的形式;在煤层的顶底板砂岩等强岩层普遍较厚的情况下,煤层高强度砂岩顶板在开采扰动下产生的动载荷条件,叠加形成了煤与瓦斯突出发生强应力场条件;高瓦斯压力、构造煤与顶板围岩特性是影响盘江矿区煤与瓦斯突出的主要因素,在煤矿开采过程中,应以瓦斯压力作为主导参数指标,并重视结合构造煤、顶板岩性的特征来开展煤层突出预测与治理工作。
In order to reveal the occurrence law of coal and gas outburst disaster in Panjiang Mining area and improve the targeted work of gas prevention and control,the gas geological parameters of 37 coal and gas outburst accident points in Panjiang Mining Area were statistically analyzed according to the principle and method of Apriori algorithm.Data mining experiments are carried out on binomial association rules with minimum support of 40%and minimum confidence of 75%.The results show the following.The results show that:coal seam gas pressure(1-2 MPa)and buried depth(200-400 m),coal thickness(2-4 m)and coal initial gas release speed(≥15 mmHg),coal thickness(2-4 m)and coal thickness variation coefficient(≤0.2),mudstone thickness(≤5 m)and wall rock strength coefficient(≥2)are strongly correlated parameter combination types,and the coal and gas outburst sites in Panjiang Mining Area show the typical characteristics of shallow burial depth,high gas pressure,thick coal seam and high strength of surrounding rock;under special conditions of shallow mountain burial depth(200-400 m),the original ground stress of coal seam is often not large,high gas pressure is the main factor affecting coal and gas outburst,and the gas pressure of coal seam generally reaches1-2 MPa;the increase of coal thickness and the high initial velocity of gas release reflect that the coal structure has been too strongly damaged,and the local development of structural coal with coal and gas outburst tendency and the small variation coefficient of coal thickness indicates that the failure form of coal seam is not characterized by local variation of coal seam,but may exist in the form of coal structure failure characterized by stratified structural coal;in the case that the strong rock strata such as the top and bottom sandstone of coal seam are generally thick,the dynamic load conditions generated by the mining disturbance of the high strength sandstone roof of coal seam are superimposed to form the strong stress field conditions of coal and gas outburst;high gas pressure,structural coal and roof surrounding rock characteristics are the main factors affecting coal and gas outburst in Panjiang Mining Area.In the process of coal mining,gas pressure should be taken as the main parameter index,and the characteristics of structural coal and roof lithology should be combined to predict and control coal seam outburst.
作者
周侃
杨宏民
关金锋
司中应
ZHOU Kan;YANG Hongmin;GUAN Jinfeng;SI Zhongying(School of Materials and Architectural Engineering,Guizhou Normal University,Guiyang 550025,China;School of Emergency Management,Guizhou Normal University,Guiyang 550025,China;School of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China;Engineering Research Center of Ministry of Education for CoalMine Disaster Prevention and Emergency Relief,Jiaozuo 454000,China;State Collaborative Innovation Center of Coal Work Safety and Clean-efficiency Utilization,Jiaozuo 454000,China;College of Mining Engineering,Guizhou University of Engineering Science,Bijie 551700,China;Panzhou Energy Bureau,Panzhou 553500,China)
出处
《煤矿安全》
CAS
北大核心
2024年第7期1-8,共8页
Safety in Coal Mines
基金
国家自然科学基金面上资助项目(52074104)
贵州省科技计划资助项目(黔科合支撑[2019]2876号)。
关键词
煤与瓦斯突出
APRIORI算法
瓦斯压力
构造煤
围岩特性
coal and gas outburst
Apriori algorithm
gas pressure
tectonically deformed coal
surrounding rock characteristics
