The paper study thin and thick seam with steep dip mining technique of 7417 fully mechanized top-coal caving face,in Zhangshuanglou coal mine,introduce to coal mining method and equipment anti-skid successful experience,provide reliable use for reference mining of resemble face.

通過對張雙樓煤礦7417綜采放頂煤工作面急傾斜較薄厚煤層開采技術的綜合治理研究,系統(tǒng)的介紹了采煤方法、設備防倒防滑的成功經(jīng)驗,可供相似復雜條件下綜放面的安全開采借鑒。

2 Coal Mine, systematically introduce the successful experiences in coal mining method, equipment model selection mating, hyudraulic support anti-skid measures.

通過對國投新集能源股份公司二礦1113107綜采面,在推覆體下大傾角、厚軟煤層開采技術的綜采技術研究,系統(tǒng)地介紹了采煤方法、設備選型配套、液壓支架防倒防滑措施的成功經(jīng)驗,可為相似復雜條件下綜采面的安全開采提供借鑒經(jīng)驗。

It was also evaluated the concentration of treating solution,baking time and baking temperature had effect on water-and oil-proofing.

以全氟辛酸和氨基硅油為原料,合成了一種氟烷基聚硅氧烷防水防油劑,用IR、NMR對其結構進行了表征。

Fire and explosion prevention in railway tunnel is of great significance for ensuring good tunnel condition and traffic safety.

鐵路隧道防火防爆對于確保隧道完好、行車安全具有重要意義。