摘要
为了揭示采空区顶板诱发煤与瓦斯突出机理,进行了相关数值模拟研究。研究结果表明:采空区悬顶导致上覆岩层的重力传导至工作面附近煤体中,诱使煤体内部应力集中现象严重,塑性区范围增大。同时使得煤体内部的裂隙较为发育,裂隙范围也相对较大,为瓦斯的运移和储存提供了良好的地质条件;煤体内部的压力增大有利于瓦斯的吸附解吸活动;采空区悬顶使得工作面附近煤体产生应力集中且有利于裂隙发育而提高了瓦斯的运移和储存;隐伏断层的存在加剧了上述情况,使得煤与瓦斯突出的危险性进一步提升;通过3DEC模拟出了隐伏断层失稳时的泄压现象。
In order to reveal the mechanism of flap top of goaf induce coal and gas outburst, the related numerical simulation is carried out. The experiment results show that flap top of goaf lead to gravity of overlying rock strata is conducted .through the nearby coal mass of coal face, aggravate stress concentration and fracture development in coal mass, enlarge the radius of plastic zone and fracture, it forms a fine geological conditions to the transport and the storage of the gas; pressure in coal mass increases is beneficial to adsorption-desorption action of gas; but buried fault aggravate the situations above again, induce further risk of coal and gas outburst; under circumstance of buried fault, abrupt pressure leak fits pressure leak happens in gas outburst accidents.
出处
《煤炭技术》
CAS
2018年第1期139-141,共3页
Coal Technology
基金
国家自然科学基金项目(51574093
51427804)
贵州省应用基础研究计划重大项目(JZ字[2014]2005)
贵州省高层次创新型人才培养项目(黔科合人才(2016)4011号)
国家“十二五”科技支撑项目课题(2012BAB08B06)
贵州大学研究生创新基金项目(研理工2017083)
关键词
采空区悬顶
瓦斯突出
隐伏断层
数值模拟
flap top of goal
gas outburst
buried fault
numerical simulation
