摘要
为了研究马兰矿瓦斯抽采钻孔合理的孔间距,基于太沙基有效应力和弹性力学的基本原理,建立了10505工作面瓦斯抽采的固气耦合模型,通过数值模拟软件分析了单一钻孔的抽采情况并进一步确定了有效抽采半径为1.52 m,根据采掘接替的要求,分析了预抽期为180天时孔间距分别为2.6 m和3 m时孔周的瓦斯压力分布情况。研究表明:马兰矿10505工作面顺层钻孔合理的孔间距应为2倍的有效抽采半径,即3 m.
To study the reasonable distance between the gas drainage holes in Malan coal mine, bases on the theory of Terzaghi effective stress and elastic mechanics, solid-gas coupled model of 10505 working face gas extraction is established. The situation of single drainage hole is analyzed by numerical simulation software, and the effective radius of gas drainage is determined as 152 m. According to the requirement of mining and development replacement, when pre-draining time is 180 days analyzes the gas pressure distribution situation around the holes of which space is respectively 26 m and 3 m. The study shows that the reasonable distance between the holes of 10505 working face bedding in Malan coal mine is the double of effective drainage radius, namely 3 m.
出处
《山西焦煤科技》
2015年第7期39-41,56,共4页
Shanxi Coking Coal Science & Technology
关键词
瓦斯抽采
孔间距
太沙基有效应力
弹性力学
固气耦合模型
数值模拟软件
Gas drainage
Distance between the holes
Terzaghi effective stress
Elastic mechanics
Solid-gas coupled model
Numerical simulation software
