本文選題：風(fēng)積砂似膏體 + 連采充填工作面　； 參考：《煤炭科學(xué)技術(shù)》2017年11期

【摘要】：為了防止膠結(jié)充填開采中充填體凝固過程放熱引起相鄰煤體自燃風(fēng)險,分別進行了井下充填體溫度場實測和煤自燃指標氣體試驗。在風(fēng)積砂似膏體連采充填工作面支巷1 386 m~3充填體內(nèi)部、與外部交界面及相鄰煤體不同位置設(shè)置了16個測點,進行了為期50 d的充填體水化溫度場監(jiān)測,結(jié)果表明:溫度變化分為"快速上升"、"較快下降"和"緩慢下降"3個階段,94~98 h內(nèi)部溫度達到峰值63.5~64.4℃,水化溫度持續(xù)時間約30 d;相鄰煤體受水化熱影響深度約0.5 m。實驗室自燃指標氣體(CO、C_2H_4和C_3H_8)試驗表明,受充填體水化熱影響的煤樣指標氣體生成的初始溫度低于常規(guī)煤樣,且相同溫度下前者指標氣體濃度大于后者,表明前者更容易自燃。研究表明膠結(jié)充填采空區(qū)煤體自燃風(fēng)險不容忽視。
[Abstract]:In order to avoid the risk of spontaneous combustion of adjacent coal mass caused by the heat release of filling body during cemented filling mining, the temperature field of the filling body and the gas test of coal spontaneous combustion index were carried out respectively. In this paper, 16 measuring points were set up at the branch roadway of 136mm3 filling face in the wind-sand like paste continuous mining and filling working face, and 16 measuring points were set up at the interface with the outside and different positions of adjacent coal bodies. The hydration temperature field of the filling body was monitored for 50 days. The results show that the temperature variation can be divided into three stages: "rapid rise" and "slow drop". The internal temperature reaches the peak value of 63.5 鈩，

本文編號：1971170