【作者】 戚斐文；

【导师】 王建国；

【作者基本信息】 西安科技大学 ， 安全科学与工程， 2019， 硕士

【摘要】 硫化氢是煤矿有害气体的一种,一些埋藏较浅的矿井并不常见,但有一些矿井由于埋藏较深、成煤时期地质活动剧烈等原因会使得煤层中富含硫化氢气体,在矿井开采时大量涌出,给正常的生产活动带来严重的阻碍,对工人身体造成极大伤害。随着煤矿开采范围的扩张以及采掘深度的不断增加,己探明或正在开采作业的矿井井下越来越呈现出硫化氢异常涌出的现象。本文从成因及演化理论分析、煤层物性参数测定和数值模拟仿真三个角度研究了采用煤层注碱的方法治理小庄矿4#煤硫化氢涌出灾害的可行性及注碱治理硫化氢的效果。主要从以下方面进行了研究:通过分析小庄矿成煤环境、地层和热演化规律,初步明确了小庄矿煤层硫化氢的成因和来源,结果表明,小庄矿4#煤硫化氢的主要成因为生物硫酸盐还原作用;提出了以PH值和煤层气含量测定为基础的煤层硫化氢测定方法,测得小庄矿4#煤吨煤硫化氢含量为5.63×l0-3m/t到8.37×l0-3m3/t;根据国家标准规定的煤层可注水性判定方法,测定了 4#煤层煤的力学特性和物性参数,结果显示,4#煤层具有良好的可注水性;建立了小庄矿4#煤层注碱除硫化氢的数学和物理模型,在COMSOL Multiphysics数值仿真软件中模拟研究了注液过程中碳酸氢钠溶液的流动和扩散规律及伴随该过程的化学反应的热效应及煤层中的除硫效果,对比分析5m和10m孔距注液的优劣,确定了更为合理的注碱孔距;在理论分析和数值模拟的基础上研究了4#煤层的注碱钻孔参数及注碱参数。论文为小庄矿硫化氢涌出灾害治理在技术参数及现场实践方面提供了有力的支持,对煤矿井下硫化氢涌出灾害的判定和治理具有理论指导意义。更多还原

【Abstract】 Hydrogen sulfide is a kind of harmful gas in coal mines,Some shallow mines are unusual However,some mines are rich in hydrogen sulfide gas in coal seams due to deep burial and severe geological activities during coal formation,A larme amount of gushing out during mine mining has caused serious obstacles to normal production activities and caused great harm to workers’ bodies.With the expansion of coal mining scope and the inreasing depth of mining,the abnormal underground hydrogen sulfide is more and more present in mines that have been proven or are being minedThis paper studies the feasibility of using coal seam injection method to control the hydrogen sulfide flooding of 4#coal in Xiaozhuang Mile from the perspectives of genesis and evolution theory,coal seam physical property measurement and numerical simulation.The research is mainy carried out from the following aspects:by analyzing the coal-forming environment stratum and thermal evolution of Xiaozhuang Mine,the origin and source of hydrogen sulfide in Xiaozhuang Coal Seam are preliminarily identified,The results show that the main cause of hydroen sulfide in Xiaozhuang Mine 4#coal Because of the biological sulfate reduction;a method for determining hydrogen sulfide in coal seam based on the determination of PH value and coalbed methane content is proposed,The hydrogen sulfide content of 4#coal ton coal in Xiaozhuang Mine is 5.63×10-3m3/t to 8.37×10-3m3/t;According to the national standard for determining the water injection.capacity of coal seam,the physical property parameters of coal seam of 4#coal seam were measured,The results show that the 4#coal seam has good water injection;the 4#coal seam of Xiaozhuang Mine is established,In addition to the mathematical and physical models of hydrogen sulfide injection,the flow and diffusion of sodium bicarbonate solution during the injection process and the thermal effects of the chemical reactions accompanying the process and the sulfur removal effect in the coal seam were simulated in the COMSOL Multiphysics numerical simulation software,Contrasting and analyzing the advantages and disadvantages of 5m and 10m drill injection,determined a more reasonable injection drill spacing;based on theoretical analysis and numerical simulation,studied the lye injection drilling parameters and lye injection parameters of 4#coal seam.This paper provides strong support for the technical parameters and field practice of the disaster management of hydrogen sulfide emission in Xiaozhuang mine,and has guiding significance for the judgment and management of the disaster.更多还原