Testing research of coal layer safe extraction in efflorescent oxygenized belts 風(fēng)氧化帶內(nèi)煤層安全開采的試驗(yàn)研究
The following new opinions : without caving zone coal layer extraction in efflorescent oxygenized belts ; two effects of blocking water and preventing water flowing fractured zone from going on developing after mining effect ; appropriately enlarging the extraction thickness were presented 提出了風(fēng)氧化帶煤層開采無垮落帶;受采動(dòng)影響后,具阻水和抑制導(dǎo)水裂隙帶繼續(xù)發(fā)展的雙重作用以及適當(dāng)加大開采厚度等新觀點(diǎn)。
Based on testing data in worksite and engineering practice , the strata damage movement characteristics , rock properties of weathered zone and qualitative and quantitative analysis of the mechanism of coal layer safety extraction in efflorescent oxygenized belts were discussed 摘要根據(jù)現(xiàn)場(chǎng)觀測(cè)和工程實(shí)踐,論述了風(fēng)氧化帶內(nèi)煤層開采時(shí),覆巖破壞移動(dòng)特征,風(fēng)化帶巖石屬性和風(fēng)氧化帶內(nèi)煤層安全開采機(jī)理的定性、定量分析。
But the grain growth , grain semiconduction and grain boundary insulation were influenced by many factors , such as the type and contents of dopants , sintering temperature and so on . therefore , in this thesis the effect of the restore sintering temperature , the oxygenize temperature , the donor and acceptor dopant on the dielectric and varistor properties of devices were studied . with sem , the microstructure of srtio3 - based double function ceramic was analyzed 而晶粒生長(zhǎng)、晶粒半導(dǎo)化和晶界絕緣化受到多種因素的影響,諸如雜質(zhì)的種類和含量、燒成溫度等,因此本論文研究了還原燒成溫度、中溫氧化溫度、施主和受主摻雜等對(duì)srtio _ 3基陶瓷的壓敏和介電性能的影響,并借助于sem分析對(duì)srtio _ 3基雙功能陶瓷的微觀結(jié)構(gòu)進(jìn)行了分析。
change (a compound) by increasing the proportion of the electronegative part; or change (an element or ion) from a lower to a higher positive valence: remove one or more electrons from (an atom, ion, or molecule) 同義詞:oxygenise,