广东大兴煤矿特大突水事故机理分析  

Mechanism analysis of water inrush in Daxing coal mine

作　　者：赵苏启[1] 武强[1] 尹尚先[2] 

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083 [2]华北科技学院安全工程中心,北京101601

出　　处：《煤炭学报》2006年第5期618-622,共5页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(40572149);教育部重大科学技术研究项目(2004-295);教育部新世纪优秀人才计划联合资助项目(NCET-04-0254)

摘　　要：通过实地调查、测量以及地质及地球物理勘探,分析认为大兴煤矿“8.7”突水事故的突水机理为:防水煤柱受断层破碎带的影响,在上部水压、采动矿压、煤层自重、地下水的联合动力作用下,破碎的岩体沿垂向固有构造裂隙面向上塌落形成椭圆形柱体,待形成自然平衡拱后塌陷垮落停止,上覆岩层得到暂时稳定;随着采煤工作面的不断扩大,自然平衡拱被再一次打破,椭圆形柱体内的垮落继续向上发展,直至最后的关键层破坏或破碎达到临界突水系数而发生突水.Study showed by field survey, geological and physical geographical exploration that mechanism of water inrush happened in Daxing coal mine, Guangdong Province is as follows： crashed rocks in water barrier pillars collapse upwards follow the vertical original fracture surface by influence of fault crash zone and the ellipse column cave is formed under the dynamical actions of water pressure, mining pressure, rock mass gravity, and groundwater. Collapses stop after natural balance arch formed and overburdens keep stabilization briefly. As face expanding continually, natural balance arch is broken again, collapses keep on developing upwards in the ellipse column cave. At last, water inrush occurs because key stratum.is broken and critical coefficient of water inrush is satisfied.

关 键 词：突水机理 垮落 水压 突水系数 

分 类 号：TD745[矿业工程—矿井通风与安全]