文章來源：神華集團有限責任公司(si) 發布時間：2013-12-05
近日，神華神寧煤業集團麥垛山礦實施的兩條立井凍結工程獲得成功，所采用的凍結法施工技術獲得了國家專利，填補了國內局部凍結技術的空白，對神華集團乃至全國礦井建設具有重要的借鑒意義。
該籌建處副立(li)井(jing)(jing)(jing)、回(hui)風(feng)立(li)井(jing)(jing)(jing)井(jing)(jing)(jing)筒采(cai)用普(pu)通法(fa)(fa)(fa)掘(jue)砌250米左右時(shi)遇強含(han)(han)水層，在(zai)(zai)采(cai)用注漿、降(jiang)水等方(fang)案均未達到安全施(shi)(shi)工(gong)(gong)要求的(de)(de)情況下，改為(wei)凍(dong)(dong)(dong)(dong)(dong)(dong)(dong)結(jie)(jie)法(fa)(fa)(fa)施(shi)(shi)工(gong)(gong)。在(zai)(zai)凍(dong)(dong)(dong)(dong)(dong)(dong)(dong)結(jie)(jie)施(shi)(shi)工(gong)(gong)過程(cheng)中充分(fen)(fen)吸取了(le)局部凍(dong)(dong)(dong)(dong)(dong)(dong)(dong)結(jie)(jie)的(de)(de)經驗教訓，將上(shang)段已成井(jing)(jing)(jing)壁保護作為(wei)技術攻關的(de)(de)重點(dian)，研發出(chu)凍(dong)(dong)(dong)(dong)(dong)(dong)(dong)脹(zhang)模(mo)擬試驗模(mo)型，利(li)用模(mo)擬試驗和(he)數值模(mo)擬的(de)(de)方(fang)法(fa)(fa)(fa)，研究了(le)凍(dong)(dong)(dong)(dong)(dong)(dong)(dong)結(jie)(jie)和(he)強制解(jie)凍(dong)(dong)(dong)(dong)(dong)(dong)(dong)溫度場的(de)(de)分(fen)(fen)布(bu)規律，分(fen)(fen)析了(le)凍(dong)(dong)(dong)(dong)(dong)(dong)(dong)結(jie)(jie)施(shi)(shi)工(gong)(gong)產生凍(dong)(dong)(dong)(dong)(dong)(dong)(dong)脹(zhang)的(de)(de)機理，獲(huo)得軟弱、富(fu)含(han)(han)水地層非全井(jing)(jing)(jing)凍(dong)(dong)(dong)(dong)(dong)(dong)(dong)結(jie)(jie)溫度場分(fen)(fen)布(bu)規律及凍(dong)(dong)(dong)(dong)(dong)(dong)(dong)結(jie)(jie)相關的(de)(de)基本參數，提出(chu)了(le)適合寧東地區地層特點(dian)的(de)(de)非全井(jing)(jing)(jing)凍(dong)(dong)(dong)(dong)(dong)(dong)(dong)結(jie)(jie)法(fa)(fa)(fa)施(shi)(shi)工(gong)(gong)的(de)(de)設計方(fang)法(fa)(fa)(fa)、監測和(he)施(shi)(shi)工(gong)(gong)方(fang)法(fa)(fa)(fa)、既有井(jing)(jing)(jing)筒的(de)(de)各種保護措施(shi)(shi)及保護井(jing)(jing)(jing)筒的(de)(de)施(shi)(shi)工(gong)(gong)要求。