大采高工作面采动围岩活动与瓦斯涌出关系  

Relationship Between Surrounding Rock Movement and Gas Emission in Large Mining Height Working Face

作　　者：何福胜 毕建乙 孙亮 HE Fusheng;BI Jianyi;SUN Liang(Shanxi Coking Coal Group Corporal Limited Production Technology Department, Taiyuan 030000,China;Xiegou Coal Mine, Xis han Jinxing Energy Co., Ltd., Lyuliang 033602, China;China Coal Technology and Engineering Group Shenyang Research Institute, Fushun 113122, China;Stale Key Laboratory of Coal Mine Safety Technology, Fushun 113122, China)

机构地区：[1]山西焦煤集团有限责任公司生产技术部,山西太原030000 [2]山西西山晋兴能源有限责任公司斜沟煤矿,山西吕梁033602 [3]煤科集团沈阳研究院有限公司,辽宁抚顺113122 [4]煤矿安全技术国家重点实验室,辽宁抚顺113122

出　　处：《煤矿安全》2019年第2期183-186,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51204088)

摘　　要：为了研究大采高工作面采动围岩活动与瓦斯涌出的规律,现场实测斜沟煤矿18205工作面的液压支架支护阻力、超前支承压力及瓦斯涌出量,分析回采时支架支护阻力、超前支承压力的变化情况,根据现场实测工作面瓦斯涌出量,确定采动活动与瓦斯涌出的关系。结果证明:18205工作面矿压显现增大时,瓦斯涌出量显著升高;在周期来压时煤岩体卸压增流,工作面瓦斯涌出量明显升高。在周期来压期间覆岩裂隙通道受到挤压和冲击作用,高浓度的瓦斯流涌向工作空间,导致高位钻孔瓦斯抽采量明显增加,其与来压步距基本一致,且高位钻孔能有效拦截采空区及邻近层瓦斯,有效保障了工作面安全回采。In order to study the laws of surrounding rock movement and gas emission in mining face with large mining height, the hydraulic support resistance, advanced support pressure and gas emission of 18205 working face in Xingou Coal Mine were measured on site, and the support resistance of support, advanced abutment pressure changes were analyzed, and the relation between mining activity and gas emission is determined according to the measured gas emission amount in the working face. The results show that the gas emission increases obviously when the strata pressure of 18205 working face increases, and when the pressure comes to a certain extent, the pressure and displacement of the coal and rock mass increase and the gas emission from the working face increases obviously. The crushed rock channel was squeezed and impacted during the period of pressure cycle.High concentration of gas flow flushed into the work space, resulting in a significant increase in gas drainage. The gas drainage was basically consistent with the pressure step, and the high level borehole can effectively block the gob and adjacent layers of gas to effectively protect the face safe mining.

关 键 词：瓦斯涌出 周期来压 超前支承压力 采动裂隙场 矿压显现 采动应力 

分 类 号：TD712[矿业工程—矿井通风与安全]