沿空留巷巷旁充填材料选择及试验

Selection and Test of Road-side Filling Material in Gob-side Entry Retaining

摘要: 通过对圆柱形试件、纯水泥砂浆试件、以及含矸率不同条件下的立方体试件进行抗压强度试验和试件压剪破坏全过程声发射事件动态监测。提出试件强度值的变化随着水灰比浓度的增加而有所降低,含矸试件强度要大于纯水泥试件;声发射的频数和能率与试件所受的荷载有某种关联,当应力逐渐增加时,试件的声发射频数和能率也逐渐增加,当应力在峰后逐渐降低时,试件的声发射频数和能率也逐渐降低。
- 沿空留巷 /
- 充填材料 /
- 声发射 /
- 抗压强度
Abstract: Compressive strength test and dynamic monitoring of whole process-acoustic emission of speciments compression-shear failure were implemented with cylindrical specimen,pure cement-mortar specimen and different refuse-rate cube specimens.The results showed that changes of specimens strength reducuing with concentration increase of water-cement,strength of specimens with refuse are more than cement-mortar.Frequency and energy-ratio of acoustic emission were related with specimens load.Acoustic emission frequency and energy-ratio of specimens increasing gradually with the increasing of stress.Acoustic emission frequency and energy-ratio of specimens were decreased gradually with the decreasing of stress after peak.
- gob-side entry retaining /
- filling material /
- acoustic emission /
- compressive strength

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