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以大量實驗數(shù)據(jù)和現(xiàn)場測試資料為依據(jù)免费国内精品久久久久久久，研究了隱伏煤田基巖風(fēng)化帶巖體的分布特點及工程地質(zhì)特性，重點論述了鄰近風(fēng)化帶開采的覆巖破壞和礦山壓力顯現(xiàn)規(guī)律以及縮小防護(hù)煤柱的機理中文字幕欧洲有码无码，為類似礦井的資源回收與安全開采提供了依據(jù)日本XXXX厕所偷拍视频。

Using the technology of injecting FCL-C serous fluid into fracture zone of faults, the water transmissibility of F_(25-1) and F_(east-1) faults can be changed. Using that and other security technology steps, the waterproof coal pillar in faults can be mined safely.

并利用FCL—C漿液，注漿加固斷層破碎帶技術(shù)白浆AA片，改變F_(25—1)和F_(東—1)斷層的導(dǎo)水性人人网人人摸人人操，并通過采取其它的安全技術(shù)措施，實現(xiàn)斷層防水煤柱的安全開采日韩第一视频。

Then checking up mining practice, analyzing the observation and prediction data of dripping water amount and effusing water amount throughout mining. It is obvious from the research that the definitive width of waterproof pillar

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stonework：砌石

stonewall 石墻 | stonework 砌石 | stoop 安全煤柱

barrier pillar：安全煤柱

barrier method 柱式開采法 | barrier pillar 安全煤柱 | barrier system 柱式開采法