| 掘进巷道蝶型煤与瓦斯突出机理猜想 |
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| 作者姓名： | 马念杰 赵希栋 赵志强 郭晓菲 刘洪涛 贾后省 |
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| 作者单位： | 1.中国矿业大学(北京)资源与安全工程学院,北京100083;2.河南理工大学能源科学与工程学院,河南焦作454003 |
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| 基金项目： | 国家自然科学基金重点项目(51434005) |
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| 摘 要： | 借鉴巷道蝶型冲击地压理论及非线性动力系统理论,提出了掘进巷道蝶型煤与瓦斯突出机理的猜想,认为掘进巷道煤与瓦斯突出的力学本质是巷道掘进工作面前方极短时间内出现一定程度的蝶形塑性区增量,引发围岩内弹性能与瓦斯能的叠加并迅速释放,进而发生煤与瓦斯突出。从蝶型冲击地压与蝶型煤与瓦斯突出在塑性区变化规律上的一致性及突出能量源的大小等方面对猜想的合理性进行了论证,构建了煤与瓦斯突出危险性的评估指标体系,提出了发生煤与瓦斯突出的强度、应力、角度和触发事件等4个必要条件,确定了发生煤与瓦斯突出的充分条件;首次对煤与瓦斯突出现象、发生条件与过程进行了定量分析与定量(非定性)解释。研究成果为煤层巷道煤与瓦斯突出的预测、预报和防治提供了全新的思路。
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| 关 键 词： | 蝶型 冲击地压 煤与瓦斯突出 机理 综述 |
| 收稿时间： | 2017-02-20 |
Conjecture about mechanism of butterfly-shape coal and gas outburst in excavation roadway |
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| Affiliation: | 1.College of Resources and Safety Engineering,China University of Mining and Technology,Beijing 100083,China;2.School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo,Henan 454003,China |
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| Abstract: | Referring to roadway butterfly shape rock burst mechanism and nonlinear dynamic system theory,a conjecture about butterfly-shape coal and gas outburst mechanism in excavation roadway has been made,In this conjecture,the mechanical essence of coal and gas outburst in excavation roadway is that a certain degree of butterfly shape plastic zone increment appears in front of excavation face in an extremely short period of time,triggering in the quick release of surrounding rock elastic energy and gas energy,thus resulting in coal and gas outburst.From the aspects of consistency of plastic zone changing laws between butterfly rock burst and coal and gas outburst,the outburst energy source and the rationality of conjecture was verified,and the risk evaluation system of coal and gas outburst was established as well.Four necessary conditions of strength,stress,angle and triggering event for coal and gas outburst were put forward,besides,the sufficient conditions of coal and gas outburst were determined; Quantitative analysis and explanation(not qualitative)of the phenomenon,occurring condition and process of coal and gas outburst were studied for the first time.The research result has provided a new idea for the research work in the field of coal and gas outburst forecast,prediction and prevention in coal seam roadway. |
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