高位岩浆岩条件下瓦斯运移通道发育特征及瓦斯运移规律研究

发布时间：2018-05-27 23:03

  本文选题：高位岩浆岩 + 相似模拟　； 参考：《中国煤炭》2017年12期

【摘要】：为研究关键层条件下瓦斯运移通道发育特征,以杨柳煤矿104采区为工程背景,通过相似材料试验,模拟了高位岩浆岩条件下离层裂隙发育规律。研究表明:随着工作面的不断推进,覆岩裂隙逐渐向上发育,并止于岩浆岩底部;高位岩浆岩的存在对离层裂隙发育起着控制作用,岩浆岩破断前,其底部形成大面积离层空间,为离层瓦斯的形成提供了条件;硬厚岩浆岩底部离层空间长时间大量扩展,为离层瓦斯积聚提供了孕育空间;岩浆岩发生破断后,离层瓦斯受强动压冲击作用,通过断裂裂隙突涌至工作面或采空区内,造成瓦斯突涌事故。通过离层注浆、抽采离层瓦斯等措施防治硬厚岩层下瓦斯突涌。
[Abstract]:In order to study the development characteristics of gas migration channels in key strata, taking the No. 104 mining area of Yangliu Coal Mine as the engineering background, through the similar material test, the development law of the fissure in the separated layer under the condition of high magmatic rock is simulated. The results show that: with the continuous advance of the working face, the overburden fissures gradually develop upward and stop at the bottom of the magmatic rocks, the existence of the upper magmatic rocks plays a controlling role in the development of the fissures in the separated strata, and before the magmatic rocks break down, A large area of separation space is formed at the bottom of the rock, which provides the condition for the formation of gas in the separation layer; the space of separation layer at the bottom of hard and thick magma is extended for a long time, which provides breeding space for gas accumulation in the separation layer; the magmatic rock is broken, Under the strong dynamic pressure, the gas burst into the face or the goaf through the fracture crack, which caused the gas burst accident. Measures such as grouting and gas extraction are used to prevent gas outburst under hard and thick strata.
【作者单位】： 山东科技大学矿业与安全工程学院;山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地;山东科技大学资源与土木工程系;
【基金】：国家自然科学基金资助项目(51374139) 山东省自然科学基金项目(ZR2013EEM018)
【分类号】：TD712
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本文编号：1944152