为克服采用岩移观测的方式评价充填效果周期长、费用高、劳动量大等缺点,采用自主研发的采空区充填膏体在线监测系统对膏体充填体压缩量、受力情况和材料水化程度进行监测,利用其监测结果对充填效果进行评价。结果表明:膏体充填体最大压缩量为104.3 mm,压缩率约为3.85%,膏体骨料级配合理;膏体充填体最大应力为5.1 MPa,上覆岩层的弯曲变形较小;膏体充填体的水化温度最高达到54℃,水化反应第2 d最为强烈,膏体充填体早期强度上升较快,并在提高充填工作面效益同时,膏体充填体也能较好地控制上覆岩层运动。

In order to overcome the disadvantages of the long period, high cost, and high labor, an on-line monitoring and measuring system of the pastes backill b ody in the goaf was self researched and developed and was applied to the monitoring and measuring of the backfill body compression value, stressing and hydration re action.The results could be applied to the evaluation of the backfill effect.The monitoring and measurement, showed that the compression value of the pastes backfill bo dy was 104.3 mm, the compression rate was only about 3.85% and the aggregate mixed rate of the paste was rational.The max stress of the pastes backfill body was 5. 1 MPa and the bending deformation of the overburden strata was small.The hydration temperature of the pastes backfill body could reach 54 °C in max and the hydratio n reaction would be most serious at the second day.The initial strength of the pastes backfill body would be increased quickly and could be favorable to improve the pro duction of the backfill mining coal face.The pastes backfill body would have a good effect to control the overburden strata movement.

国家自然科学基金资助项目(50874070)；山东省自然科学基金资助项目(Y2008F01)；山东省高等学校科技计划资助项目(J11LE14)；山东科技大学研究生创新基金资助项目(YCA120306)；