增压型地质构造破断区诱发煤与瓦斯突出特性研究

项目名称： 增压型地质构造破断区诱发煤与瓦斯突出特性研究

项目编号： No.51304112

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 矿业工程

项目作者： 张春华

作者单位： 辽宁工程技术大学

项目金额： 25万元

中文摘要： 地质构造对突出起重要作用，但不同形态地质构造的诱突机制迄今没有形成统一的认识，仍在探索。前期研究认为增压型地质构造比减压型地质构造更具突出的条件，可以此为切入点开展研究，深入揭示地质构造诱突机制。拟运用自制的三维液压加载突出模拟装置和具有含瓦斯煤岩破裂过程模拟功能的力学软件RFPA2D-GAS，以含增压型地质构造破断区煤层掘进为典型模型进行模拟实验，研究煤层初始应力的异常分布和瓦斯赋存特征，揭示掘进面前方围岩采动应力场与构造应力场的叠加特性及其对瓦斯流动的控制效应，并现场跟踪研究地质构造影响突出情况，最终提出增压型地质构造破断区诱突机制。并研究减压型地质构造对突出的影响，综合对比分析，提出增压型地质构造的辨识依据，初步提出其危险性消除原理。项目研究不仅有助于更深入地揭示地质构造诱发突出机理，还可为地质构造影响下瓦斯突出预测预报和防治提供新的方法，对煤矿安全生产具重要理论指导意义和实用价值。

中文关键词： 增压型地质构造；煤与瓦斯突出；应力叠加；瓦斯；辨识

英文摘要： Tectonic structures play an important role in controlling coal and gas outburst, but there has not formed a unified understanding of the mechanism that how different types of tectonic structures control coal and gas outburst. Basing on previous studies，we find that pressure increasing tectonic structures are more easily to induce coal and gas outburst, the mechanism and icriterion are necessary to further study. We propose to use self-developed three-dimensional hydraulic loading outburst simulation apparatus, by the coal roadway driving which is more prone to happen outburst as the typical similar simulation experiment model, to reveal the initial stress distribution and gas occurrence rule of the coal seam with pressure increasing tectonic structure broken zone, to exploration the superimposed effect of the mining stress field and the tectonic stress field in front of the tunneling face, to expound the control mechanism of the superimposed stress field to the gas flow field. It will reappear and validate the experiment results from micro angle with the gas-solid coupling software RFPA2D-GAS which can simulate the failure process of gassy coal and rock. And in the coal mine field, the influence of tectonic structures to outburst is tracked and analyzed; In addition, the suppression effect of the pressure decrea

英文关键词： pressurized tectonic structure；coal and gas outburst；stress superposition；gas；identification