深厚冻结井壁壁间前注浆机理与应用  

Early grouting mechanism and application between thick freezing shaft walls

作　　者：盛天宝[1] 

机构地区：[1]焦作煤业(集团)有限责任公司,河南焦作454002

出　　处：《煤炭学报》2009年第7期912-916,共5页Journal of China Coal Society

基　　金：河南省2006年科技发展计划基金资助项目(064460002)

摘　　要：实测了焦作煤业(集团)有限责任公司赵固一矿526 m深厚冲积层冻结井内、外层井壁温度.研究得出,在套内壁结束至冻结壁解冻透水前,有2个时间段壁间处于正温度状态,能实施透水前壁间注浆.前注浆的井壁密实度高,井壁结构整体性强,能有效防止解冻后壁间充水,改变后注浆的由内层井壁单独承载水压为井壁全厚承载水压的作用.基于前注浆井壁作用机理提出并采用"按前注浆压力计算内层井壁厚度"的新方法,优化了副、风井井壁厚度设计,比初设按常规的静水压力计算选取内层井壁厚度减薄150和100 mm.研究和工程应用表明,前注浆能充分发挥井壁的整体作用能力和强度.Measured the temperature of inside and outside Mine of Zhaogu, Jiaozuo Coal Industrial Group Co. Ltd.. freezing shaft walls of 526 m thickness alluvium in No. 1 The research shows that at the end of the inside wall cased and before the freezing wall thawed and seeped, in two period of time walls are in positive temperature, and grouting between walls before seeping can be carried out. After using early grouting, the wall＇ s degree of density is higher and structure is more integrity. This can prevent priming between walls after thawing effectively and change the function from the inner wall bearing the weight of water pressure alone to the whole walls by using late grouting. Based on the mechanism of early grouting, ＂the new way of calculating the thickness of inner wall according to early grouting pressure＂ was used and the wall＇ s thickness design of auxiliary shaft and air shaft was optimized. And this thinned 150 and 100 mm of inner wall＇ s thickness than according to the pressure of still water. The research and application show that early grouting is the best choice, it can develop the integral ability and strength.

关 键 词：深厚冻结井壁 前注浆 井壁厚度 

分 类 号：TD265.3[矿业工程—矿井建设]