矿用无机固化泡沫充填材料研究及应用

Research and application on inorganic solidified foam filling material for mine

针对井下堵漏风和密闭墙构建时存在的劳动强度大,密封效果差等缺点,研制了一种无机固化泡沫充填材料,通过大量的实验研究了泡沫掺量、水灰比和胶凝剂对材料性能的影响,并对其进行了现场应用。研究结果表明:泡沫掺量的增加和水灰比的增大均能使初凝时间增加,硫铝酸盐水泥充填材料的初凝时间是普通水泥充填材料的31%~44%;抗压强度随泡沫掺量增加而明显降低,硫铝酸盐水泥为胶凝剂时的充填材料抗压强度较大;泡沫掺量为1,2,3倍时的材料密度是未添加泡沫时的40%~46%,23%~33%和18%~24%,可以显著降低劳动强度;硫铝酸盐充填材料在内部孔结构方面优于普通水泥充填材料。研究成果可用于确定最佳的无机固化泡沫充填材料配方,现场应用表明材料密封效果和抗压强度好,具有广阔的应用空间。

Aiming at the shortcomings of large labor intensity and poor sealing effect when sealing the air leakage and constructing the sealing wall in underground mine,an inorganic solidified foam filling material was developed. The influence of foam content,water cement ratio and gelling agent on the performance of the filling material was studied by a large number of experiments,and its field application was carried out. The results showed that with the increase of both foam content and water cement ratio,the initial setting time increased,and the initial setting time of sulphoaluminate cement filling material was31%-44% of ordinary cement filling material. The compressive strength decreased obviously with the increase of foam content,and the compressive strength of filling material when taking sulphoaluminate cement as the gelling agent was larger.When the foam content was 1,2 and 3 times,the density of the material was 40%-46%,23%-33% and 18%-24% of that without adding foam,which can significantly reduce the labor intensity. The internal pore structure of sulphoaluminate filling material was superior to the ordinary cement filling material. The results can be used to determine the optimal formula of inorganic solidified foam filling material. The field application showed that the sealing effect and compressive strength of the material were good,and the material has a wide application space.