坚硬覆岩下采动离层水涌突规律及防治技术  

Water Inrush Law in Bed Separation Due to Coal Mining Under Hard Rock and Its Control

作　　者：王启庆[1] 李文平[1] 李小琴[1] 孙如华[1] 王丹志[1] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221008

出　　处：《煤矿安全》2014年第7期59-62,66,共5页Safety in Coal Mines

摘　　要：基于厚硬覆岩采动破断会引起离层水涌突这一特征,通过分析某煤矿首采区覆岩空间赋存、岩体结构、力学性质等地质工程条件,采用力学计算、数值模拟等方法,对采区首采面及后续工作面开采厚硬岩浆岩岩床破断引起的离层初次闭合及周期闭合的距离,进行了理论计算和数值模拟分析。结果显示,首采面开采离层初次闭合距约300 m,周期闭合约130 m;后续工作面开采时受邻近采空区影响,初次闭合距约260 m,周期闭合约120 m。针对离层闭合规律提出了相应的离层水害防治措施,确保了工作面的开采安全。Based on the characterization of inrush of water in bed separation caused hard and thick overburden breakage, we analyzed the geological engineering conditions in a coal mine first mining, such as overlying strata spatial occurrence, rock mass structure, mechanical properties. The first mining face and the subsequent face overlying hard magmatite rock sill rupture caused by bed separation first closure distance and cycle closure distance was calculated and simulated by using thin plate theory and numerical simulation meth- ods. The resuhs showed, bed separation first closure distance is about 300 m and cycle closure distance is about 130 re;because subsequent work mining was effected by the adjacent mining face goal, initial closure distance is about 260 m and cycle closure distance is about 120 m. The results are in accordance with the field case analysis. According to the bed separation closure rules, we proposed the water in bed separation disaster prevention measures. The achievements were applied to the working faces to guarantee mining safe.

关 键 词：离层水 坚硬岩层 理论分析 数值模拟 离层闭合 

分 类 号：TD745[矿业工程—矿井通风与安全]