煤炭地下气化技术腔体生长规律探索  

Cavity growth law exploration of coal underground gasification technology

作　　者：向富果 葛叶子 台俊茹 雷媛媛 梁已花 Xiang Fuguo;Ge Yezi;Tai Junru;Lei Yuanyuan;Liang Yihua(Xi'an Shiyou University,Xi'an Shaanxi 710076,China)

机构地区：[1]西安石油大学,陕西西安710076

出　　处：《煤化工》2023年第6期113-116,共4页Coal Chemical Industry

摘　　要：为直观反映煤炭地下气化过程中多腔室的生长规律特征,在前人研究的基础上进行模型假设,并结合水平井产能公式对水侵规律进行探索。以水侵指数为评价依据,建立了影响腔体生长过程的主要参数的数学模型,发现影响腔体总长度的因素为水侵指数和煤层厚度。通过设计实验方案及数值模型验证,对影响腔体生长过程中的主控因素进行探索。结果表明:煤层水侵指数与煤层厚度、腔体长度呈正相关关系;当腔体长度在一定范围内时,水侵指数与腔体长度呈近似线性相关,但当腔体生长到一定程度时,水侵指数与腔体长度之间的关系逐渐转化为非线性;当腔体长度一定时,水侵指数与煤层厚度呈近似线性关系。In order to directly reflect the characteristics of multi-chamber growth law in the process of coal underground gasification,model assumptions were made on the basis of previous studies,and the water invasion law was explored in combination with the horizontal well production formula.With the water invasion index as the evaluation basis,a mathematical model of the main parameters affecting the cavity growth was established.The factors that affect the total length of the cavity were found to be water invasion index and coal seam thickness.Through the experimental plan and numerical model verification,the main controlling factors affecting the growth process of the cavity were explored.The results showed that the coal seam water invasion index was positively correlated with the thickness of the coal seam and the length of the cavity.When the length of the cavity was within a certain range,the water invasion index was approximately linearly related to the length of the cavity.However,when the cavity grew to a certain extent,the relationship between the water invasion index and the length of the cavity gradually changed into nonlinearity.When the length of the cavity was constant,the water invasion index had an approximate linear relationship with the thickness of the coal seam.

关 键 词：煤炭地下气化技术 气化腔体 煤层顶底板 生长规律 水侵指数 煤层厚度 

分 类 号：TD841[矿业工程—煤矿开采]