高应力硐室底鼓控制的应力转移技术  

Stress Transfer Technique of Controlling Chamber's Floor Heave Under High Mining Stress

作　　者：李学华[1] 黄志增[1] 杨宏敏[1] 马立强[1] 

机构地区：[1]中国矿业大学能源与安全工程学院,江苏徐州221008

出　　处：《中国矿业大学学报》2006年第3期296-300,共5页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(50374065)

摘　　要：煤矿硐室受煤层跨采影响产生的采动应力通常在其原岩应力的3倍以上,这是造成硐室严重底鼓的主要原因.从围岩应力控制的角度出发,提出了控制硐室底鼓的应力转移新技术,即通过在硐室底板掘巷,并结合在底板开掘巷道间、或底角进行松动爆破,形成一定范围的围岩弱化区的方法.这一方法可将硐室围岩附近因开采形成的高采动应力转移到围岩较深部,同时降低采动应力向硐室底板传递的强度,以此使被保护硐室处于应力相对较低的区域中,达到有效控制硐室底鼓的目的.进而利用数值模拟研究的方法对该应力转移技术的主要参数进行了分析和确定了施工方案.工程应用结果表明,应用该技术可以显著地降低硐室围岩附近的高应力,从而有效地控制硐室底鼓,为矿井的安全生产创造条件.The mining stress in surrounding rock of chamber affected by overhead mining is Usually over 3 times than that of the original stress. This is the main reason of severe floor heave of chamber. From the view of stress controlling, a new technique of stress transfer to control floor heave of chamber was presented. The main principle of the method is to form a weakening surrounding rock zone by driving roadways in the floor of the chamber and loosening blasting the surrounding rock between the roadways or the joints of the wall and the floor of the roadways. The high mining stress around the chamber can be transferred to the deeper of surrounding rock; at the same time the intensity of the mining stress transmitted to the floor of the chamber will be reduced obviously. As a result, the protected chamber locates in a zone with low stress and the floor heave of chamber can be controlled effectively. The main parameters of the construct project were discussed and determined using numerical simulation method. The application result shows that the high stress in the surrounding rock of the chamber can be reduced evidently and the floor heave of the chamber can be controlled effectively.

关 键 词：应力转移 高应力硐室 底板掘巷 底鼓 

分 类 号：TD32[矿业工程—矿井建设]